Design Proposal
Design Proposal
FA 4740 Transducer Theory
Loudspeaker Project
Tim DeYoung
02/19/2011
I.
Introduction
Simply put, there is no such thing as a perfect loudspeaker, and that is where the
art of loudspeaker design comes into play, it is an art like no other, it is an art of
compromise. The greatest loudspeakers out there arenʼt necessarily the
speakers that have the widest bandwidth, or get the loudest, or even the
smallest; the greatest speakers out there are speakers that have a perfect
balance of compromises. This is where great designers put themselves above
and beyond the average designer, they know that when it comes down to it all
they do is balance out what is more important, be it SPL, bandwidth, or size. If
they balance out these aspects perfectly, they create an awesome loudspeaker;
of course an in-depth knowledge of the physics and characteristics behind the
loudspeaker is a huge advantage also.
II.
Functional Description
By designing a speaker on my own, and using OEM parts, I can hopefully create
a product that far surpasses any commercial product in the same price range. To
much of society music is just music, a form of entertainment. But to me, music is
so much more than simply entertainment; I have always been amazed by the
ability of human beings to put so much of their emotions and so much of
themselves into what is essentially a collection of frequencies into rhythms.
Because of my almost spiritual
connection to music, I need my
speakers to be able to reproduce the
tiniest detail with the highest clarity.
SPL needs are a very important thing
to consider when making a pair of loudspeakers. Speakers that will not be able to
play loud enough will never be fully enjoyed. To make sure that my speakers will
play loud enough, I took SPL measurements in dB (C weighted) of different
genres of music and different music listening levels, and I came to the conclusion
that I need speakers to reproduce music with minimal distortion up to 103dB.
Taking into consideration I will be purchasing a 100W amplifier over the summer,
and also taking into consideration that you get a 3dB increase for every doubling
of power, my 100W amp will give 20dB over the sensitivity of my drivers.
Therefore I will need drivers with a sensitivity of at least 83dB.
To achieve maximum musical appreciation, I need some pretty decent low-end
extension. I did some experiments in which I played some songs that I enjoy and
have listened to on some very hi fidelity systems, and then cut out more and
more low-end. I also did some research into what is known as “time coherent
building”, a speaker designing process in which multiple factors such as phase
and time are taken into consideration along with things such as frequency
response. In studying speaker designers such as Richard Vandersteen and Jim
Thiel (owners of Vandersteen Audio and Thiel, the last two major companies
producing time coherent loudspeakers), I came to the conclusion that my
speakers must have an f3 of at least 40Hz to be able to fully utilize a set of time
coherent speakers.
Although these three tasks seem like un-achievable goals, by utilizing a good
cabinet design, good drivers, and a good crossover, I will be able to achieve all of
my goals, while staying in budget.
III.
Volume, Bandwidth, and SPL Relationships
In John Murpheyʼs book, Introduction to Loudspeaker Design, the author
presents the idea that you have to have trade offs between three things, SPL
output, speaker size, and bandwidth1. Any speaker that has a bandwidth of 20Hz
to 20kHz is guaranteed a floor standing speaker, or has a sensitivity of about 50
dB at 2.83V/1m. For my speakers, the most important aspect of those three is
bandwidth, I need my speakers to be
able to reach down to at least 40Hz
and up to at least 20kHz, but Iʼd like
to go one more octave above that at
40kHz. SPL-wise, I only need my
loudspeakers to have a sensitivity
rating of 83dB at 2.83V/1m, and in
todayʼs day and age most
loudspeakers can do that and more fairly easily, so this isnʼt that large of a factor,
now if I mixed at 95dB it would be a different story. When it comes to the size of
my speaker, I am well aware that with my design criteria require my speaker to
be relatively large, and luckily I donʼt have the nagging wife factor to require size
to be important. But that being said, I am not about to design six-foot tall
speakers that would just be absurd thought there are a surprising number of
people who swear by them. I will be designing a speaker which requires a stand,
but that stand will probably only be about two feet tall.
IV.
Overall Design Goals
Taking everything into consideration, from my design tradeoffs, to the physical
limitations of modern day loudspeakers, my speakers will be able to be:
•
•
•
•
•
Time coherent
Phase coherent
Sustained SPL of 83dB with 20dB of headroom
F3 of 40Hz (at least)
Upper range extending to at least 20kHz
1 John, Murphy, Introduction to Loudspeaker Design (Andersonville, Tennessee:
True Audio, 1998), Pg. 56
•
•
•
As accurate as possible (low harmonic distortion)
Good looking (natural wood tones)
100Hz to 20kHz +/- 2dB
V.
Driver Selection
The aspect of speaker design that I think is the most important is driver selection.
If a designer selects good drivers that fit well together, no matter how much he or
she spends, the loudspeaker will sound good for what they put into it. It is tough
to say that there are bad drivers out there, because sound is such a personal
thing, and every driver has a place in a loudspeaker system, it all depends on
what is being designed and who is designing it. I guarantee that I can design a
loudspeaker with any drivers and there will be someone out there who
appreciates it. That being said, there are good and bad drivers for me personally,
and since these speakers are being designed for one person (myself), there are
a lot of drivers which will not be used solely based upon my experience. For
example, the loudspeaker company Dayton Audio, almost every product review
they have is a positive one, and Iʼm sure they make a great product, Iʼve been
told many times that you get a lot of bang for your buck with them, however, I
used a 6.5 inch woofer in a speaker once, and it just didnʼt sound good to me. So
ever since then I have looked down on their speakers. Same things go with
speakers that are made out of polypropylene, I have hear exactly one brand of
speakers which use poly cones, and they sounded exactly like what they were,
plastic. Every since that I have been hesitant when it comes to poly cones, even
though that is something that Iʼm sure was just a brand specific sound.
Also another aspect of driver selection for me is that the drivers must look good,
but not flashy. For me it is important for drivers to have an understated beauty,
that is the driver must look rather plain but perform like a flashy superstar. To
compare speakers to cars, if I wanted a super car, I wouldnʼt want a car with a
very distinctive look or a bright paint job, I would want a car which would blend in
with most cars but when I open the throttle the car blows everything out of the
water. Basically it is important for the performance of my speakers to do all the
talking and not the look of the driver.
Most everything in audio is logarithmically based, and Iʼve come to the conclusion
that this is also true with driver performance versus driver price (Generally, a
twenty dollar driver is to a ten dollar driver as is a $200 driver to a $100). Though
I havenʼt made up a actual equation, I use a general rule of thumb that is: The
price range in which there is the most improvement is up to $100 per driver, at
$100 you can make a pretty nice sound system, that being said, to get a great
sound system you need to be ready to spend at least $200 per driver. This price
is a little out of my range especially with a three-way design, so I will be looking
to spend an average of $140 per driver, or around $800 for the drivers for the
entire system, this way I can get a borderline amazing system.
VI.
Subwoofer Selection
In my three-way system the subwoofer is more or less the icing on the cake,
where my midrange will be layer of chocolate cake and my tweeter being the
layer of vanilla cake. Its primary function will be to get down to 40Hz and only up
to about 200 Hz, only 2.25 octaves. But it will have to reproduce those octaves
with near perfect precision. I would love a sealed box for my sub; I really like the
sound of a sealed sub, however if need be I will have a ported enclosure.
Therefore my nine (eight) choices for subs are the following:
•
•
•
•
•
•
•
Vifa NE265W-04
Peerless 830452
HiVi SP10
TC Sounds Epic 10”
Scan-Speak Discovery 26W/4558T
SB Acoustics 10” Woofer
Dayton Audio RSS265HF-8
•
•
Dayton Audio Titanic MkIII
Peerless 835028
Here is how some those drivers compare to each other with some basic factors:
Driver
Price
Vifa
NE265W04
Peerless
XLS 10”
HiVi SP10
TC
Sounds
Epic 10”
ScanSpeak
Discovery
SB
Acoustics
10”
$170
SPL
(2.38V/1m)
88.0 dB
Fs
Qts
Xmax
Vas
$145
88.4 dB
18.9 Hz
0.17
12.5 mm
89.5 L
$185
$162
84.0 dB
85.2 dB
34 Hz
24.3 Hz
0.57
0.31
15.5 mm
22.9 mm
17 L
49.5 L
$197
89 dB
20 Hz
0.28
12.5 mm
104 L
$150
86 dB
20Hz
0.31
11 mm
66 L
Dayton
RSS HF8
$125
83 dB
25 Hz
0.5
14 mm
51.5 L
Dayton
Titanic 10”
$124
88 dB
30 Hz
0.44
18.7 mm
28.3 L
23 Hz
0.29
9.05 mm
72.83 L
Which leads to my top three and reasoning:
Peerless XLS:
This driver also has pretty good sensitivity for a sub woofer at 88.4dB. The Q is
insanely low at .17, making it only feasible in a ported box. On the frequency
graph, the low frequency doesnʼt look that good, but at the same time the
resonant frequency is 18Hz. Itʼs an eight ohm driver making it easier for amps to
handle, and I really like the look of it, it looks like a beefy subwoofer.
Dayton RSS265HF-8:
This is THE sub. I am very hesitant about buying a Dayton product, and I am
going out on a limb and going with the masses (very unlike me) and buying it. I
am hoping that at $125 it is more of a great value than a bust and that it acts like
a sub in the $175-$200 range, which is something that most people comment
about Dayton drivers. I am choosing this amp after I took a closer look at the
specs and then modeled it. This sub has excellent phase response, only going
+/- 45°, which is by far the leader in all of the subs Iʼve looked at. This sub also
has a higher Q (0.5) so it will be very nice in a sealed enclosure, and I was
surprised to find out that in only a 1.1 ft3 sealed enclosure, this speaker will get
an f3 of 40Hz, the exact value of my goal. Not only that, but the efficiency even
though it was the worst of the subs Iʼve looked at, is still 83dB, which is also the
exact value I stated. I am taking these things as signs from a higher being and
going with this driver.
Scan-Speak Discovery:
If I had more money, even with the superb performance if the Dayton driver, I
would go with this sub. Scan-Speak is just one of those names that you know for
certain you are getting a quality product. Everything about this driver is perfect for
me, but I think I am going to take the chance on the Dayton
VII.
Midrange Selection
The most important driver in my loudspeaker design is the mid-range. One of the
things that 2-way systems always seem to be lacking in is the vocal range.
Because of the physics of loudspeakers, 2-way systems are usually crossed over
between 1kHz and 2kHz, which happens to be right in the middle of the vocal
range. When a designer splits up the vocal range like this, it makes it so that the
voice is switching from driver to driver, and as each driver has its own
characteristics, the sound getʼs colored differently. Though sometimes this isnʼt a
very big problem, if a speaker is designed poorly I can really hear where the
crossover frequency is.
So my solution to this is to have a designated midrange driver, a driver that will
cover all of the major vocal range. This way my speakers will accurately
reproduce the all-important vocal range. This is also a major characteristic of
Vandersteen and Thielʼs time coherent speakers. Which leads to my 8 choices
for my midrange driver:
•
•
•
•
•
•
•
•
Seas Excel W12CY-00
Morel EW428
Eton 4-200/A8 Symphony
Fostex FX120
Fostex F120A
Morel CAW428
Audax HM100C0
Seas Prestige L12RCY/P
And my comparison table:
Driver
Price
SPL
(2.38V/1m)
Fs
Qts
Xmax
Vas
Seas Excel
W12CY-00
$180
84 dB
45 Hz
0.36
3 mm
6L
Morel EW428
Eton 4-200/A8
Fostex FX120
Fostex 120A
Morel CAW
428
Audax
HM100C0
Seas
Prestigue
L12RCY/P
$150
$124
$113
$228
$95
87 dB
88 dB
89 dB
89 dB
88 dB
62 Hz
78 Hz
70 Hz
65 Hz
74Hz
0.35
0.42
0.45
0.44
0.38
4.5 mm
2 mm
2 mm
1.5 mm
4 mm
4.7 L
2.0 L
8.21 L
9.87 L
4.5 L
$82
89 dB
54 Hz
0.21
1.8 mm
6.4 L
$75
86 dB
50 Hz
0.29
4.5 mm
5L
Which leads to my top three choices:
Seas Excel W12CY-00
This is the driver I need to use for my midrange. In order to have an amazing
sounding loudspeaker, I need to have the most vital frequencies reproduced in
absolute clarity, which is something I know this driver can do beautifully. Every
time Iʼve ever heard this driver, I have been absolutely amazed with the
wonderful sound reproduced. Not only is the sound that comes from this speaker
fantastic, but also this driver is also visually stunning with its magnesium cone
and shinny copper phase plug.
Fostex 120A
This driver has many benefits, the largest of which is the frequency response. It
is literally dead flat on-axis from 200Hz to 20kHz. Iʼd be very interested in using
this driver in a single driver system, but at $228 per driver, I cannot really see me
using this driver in this particular system.
Seas Prestige L12RCY/P
This is the little cousin to the Seas Excel woofer. It has an aluminum cone with a
black plastic phase plug. The build quality on this driver is what everyone has
come to expect from the Seas Company. All in all this is a very nice driver,
though it is only average in Harmonic Distortion, it is about 80% of the quality of
the driver that is the Excel at only 50% of the price, however that 20% is the huge
difference between an excellent driver and a truly amazing driver.
IIX.
Tweeter Selection
The tweeter in a loudspeaker is one of the most important aspects, it reproduces
the upper harmonics of instruments, and those harmonics are what give the
music its life. With a good tweeter, music just explodes from the speakers, giving
it more life and more energy. For this reason, I am going to go with a ribbon
tweeter; they are notorious for their ability to convey not only the musical notes,
but also the musical emotion. Everyone that has them, who Iʼve asked, has told
me that they are amazing tweeters and if it is a good quality transducer, I will be
happy with it for a long time to come. They also get to frequencies usually at least
an octave above 20kHz. Luckily ribbon tweeters are pretty inexpensive for the
quality you get. My choices are as follows:
•
•
•
•
•
•
Fountek NeoCd1.0
Aurum Cantus APR2.1
Tang Band RT-1516SA
Aurum Cantus G2
LCY-110
Fountek NeoCd3.0
And a table to compare them…
Price
Driver
Fountek NeoCd1.0
Aurum Cantus
APR2.1
Tang Band RT1516SA
Aurum Cantus G2
LCY-110
Fountek NeoCd3.0
Fs
SPL
$45
$94
1.6kHz
1kHz
89 dB
92 dB
$145
N/A
95 dB
$134
$167
$82
N/A
1.5kH
400Hz
96 dB
92 dB
95 dB
And my top choices being:
Fountek NeoCd3.0
This tweeter is a top-notch choice for the money. At only $82 per tweeter, they
are a great value and everyone I have ever talked to who owns one is extremely
happy with them. I have never used a ribbon tweeter before but have always
wanted to, this loudspeaker project will be the perfect chance to utilize a ribbon
tweeter.
Aurum Cantus G2
If I had just a little bit more money in my budget I would use these drivers.
Everything I have heard about them is positive, many people think they sound
exactly like a “Raven R1” ribbon tweeter, which is a top of the line DIY ribbon
tweeter. In fact this ribbon tweeter is used in many high fidelity commercial
speaker systems.
See Appendix “A” for Driver Specification Sheets
IX.
Crossover Design
The crossover is a vital part in any loudspeaker design. A good crossover can
help the drivers work together in perfect harmony, but a bad crossover will
completely degrade the sound. If a crossover is doing a good job, then people
shouldnʼt notice it working.
Now Newell thinks that active crossovers are a gift from the gods, however I will
have to respectfully disagree. The main problem with active crossovers is that
they cost a lot of money, especially if you have high quality amps. Say I have
$1,000 to spend on a speaker system, if I wanted to actively cross it over at least
half of that budget (probably more) would go into electrical components, whereas
if I passively crossed it over I would only spend a maximum of $300 on an
amplifier and the crossover components, therefore giving me an extra $200 on
raw drivers, and I whole-heartily believe that that extra amount of money being
put into the drivers will increase the quality of the loudspeaker more than the
benefits of an active system. It probably doesnʼt need too be said, but I will be
building a passive system.
X.
Cabinet Construction
Cabinets have a lot more effect on the loudspeakerʼs performance than most
people think. There are a lot of physics that go into loudspeaker enclosures, be it
internal reverberations or cabinet wall vibrations, a lot of aspects can be
improved in cabinets.
My loudspeaker will be a hybrid design; each element (sub-woofer, midrange,
and tweeter) will have its own type of enclosure. My subwoofer will be in a 1.0 ft3
sealed box, in a trapezoidal shape. I originally thought that I was going to have to
use a ported enclosure to simply get the bass extension I needed. However I
found the Dayton subwoofer that will get to 40 Hz in a sealed box. I believe the
benefits of a sealed box, their superior transient response and phase coherence,
extremely outweigh the low end extension.
My midrange will have a sealed transmission line enclosure. Meaning that if I am
successful, none of the energy that is emitted off the rear of the driver will be
reflected back onto the driver. I will achieve this by taking a pipe off the back of
my driver and stuffing that pipe with sound absorbent material. Essentially this
will achieve two things; it will make my driver act like it is in an infinite space
(giving it amazing transient response and a nice easy slope of a low-cut filter),
and it will all but eliminate baffle reflections which cause muddiness in the
midrange. I am really excited to implement this design because it is something
Iʼve never done before.
XI.
Bracing and Dampening
My box will be a simple construction of ¾ MDF, on the inside with ½ plywood on
the outside. For a decorative aspect, I am going to create a checkerboard surface
with two different woods and two different grain directions; it is going to be similar
to a butcher-block look. Then I am just going to use pieces of solid stick goods of
a nice wood to build the supports for my midrange enclosure and my tweeter. To
dampen my subwoofer box it will have quite a bit of fiberglass dampening
material in it.
XII.
Price
My budget will be a maximum of $1,100. Consisting of the following elements:
•
•
•
•
•
(2) Subwoofers ~ $250
(2) Midranges ~ $360
(2) Tweeters ~ $160
(2) Complete X-overs ~ $200
(2) Materials for cabinets ~ $130
Bibliography
“Sealed Enclosure – Golden Ratio?”. DIY Audio. Forums. Posted: December
2009. {http://www.diyaudio.com/forums/multi-way/156960-sealed-enclosuregolden-ratio.html}
“3-way Crossover Example”. DIY Audio and Video. Copyright: 1996-2011.
{http://www.diyaudioandvideo.com/Tutorial/Crossover/}
“The Audio Pages”. Elliott Sound Productions. Copyright: 2001.
{http://sound.westhost.com/lr-passive.htm#s4.2}
“DIY Project Totally Tubular”. Parts Express. Copyright: 2011. Written by:
Michael Van Den Broek.
{http://www.partsexpress.com/projectshowcase/indexn.cfm?project=Totall
yTubular}
“Bessel Filter”. Texas Instruments. Visited: January 28, 2011.
{http://wwwk.ext.ti.com/SRVS/Data/ti/KnowledgeBases/analog/document/f
aqs/bes.htm}
“Slimline Wall-Mounted Speaker”. Zaph Audio. Posted: 2005.
{http://www.zaphaudio.com/audio-speaker20a.html}
“Introduction to Loudspeaker Design”. Murphy, John L. Copyright 1998
“Loudspeakers for Music Recording and Reproduction”. Newel, Philip and
Holland, Keith. Copyright 2007
Paradigm, “Monitor Series, Mini Monitor”, © Paradigm 2011
{http://www.paradigm.com/products/paradigm/bookshelf/monitorseries/mini-monitor}
Rosebud Veneer, “Olive Ash Burl”, © Rosebud Veneer 2011
{http://www.rosebudveneer.com/wood/m-p/index.html}
Stereophile Magazine, “Focal Electra 1007 Be loudspeaker”, by: John Atkinson,
posted: June 16, 2006
{http://www.stereophile.com/standloudspeakers/606focal/index.html}
Stereophile Magazine, “Paradigm Reference Studio/20 loudspeaker”, by: Robert
J. Reina, posted: May 21, 2008 {http://www.stereophile.com/content/paradigmreference-studio20-loudspeaker-0}
Appendix “A”
•
Vifa NE265W-04
The Vifa NE product line have cutting-edge transducer technology with a stylish
design. The woofers in this product line feature an innovative aluminium basket
design which minimizes acoustic reflections inside the driver. The basket is both
a heat sink and a neodymium motor. The cone and dust cap have a coated
wood fiber material. The cone has pentacone technology for improved
performance.
•
•
Peerless 830452
Thick Nomex fiber cone
Cast frame
• Big roll rubber surround
• Works well with 830481 passive in 20 liters
• 269.3mm Ø flange
• 240mm Ø cut out
• 107mm depth
There is a Scan-speak 26W/0-00 10" passive radiator that should work well with this
•
woofer in about 0.6 cubic foot.
Znom 8 ohm
Re 3.4 ohm
Le 4.3 mH
fs 18.6 Hz
Qms 2.66
Qes 0.18
Qts 0.17
Mms 139.3 g
Cms 0.52 mm/N
Sd 333 cm2
BL 17.5 N/A
Vas 80.2 ltrs
Xmax 12.5 mm peak
Voice Coil Ø 51 mm
Sensitivity
2.83V / 1m 88.4 dB
Power (IEC) 200 W
Magnet weight 2.42 kg
•
HiVi SP10
Home
Mail
China
SP10 Sub-Woofer
It applied Denmark P.M.K double layer mica high strength film membrane, high suitable and damp dustproof cap, and Fs and Qts
features, which make well frequency response, abundant bass and forceful power. High performance ferrite outward magnet style
magnetic circuit structure and hard wide sides anti-cover trough framework. Non-eddy loss Kapton voice coil framework and heatresistant SV voice coil and ultra-long stroke linear displacement have high power handling, big trends and low-distortion.
It suit for Hi-fi 2-way reflex shelved speaker, and bass unit of double-unit in series 3-way reflex console-module dumb bell box.
Products Graph:
SP10 Frequency Response
(Magnify)
More picture
SP10 Mechanical Drawing
(Magnify)
SP10 Impedance curve
(Magnify)
Woofer & Type: !"#$%#&'())%#***
SP10 Sub-Woofer
Nominal Impedance (Z)(O) :
4
Resonance Frequency (Fs)(Hz) :
34
Nominal Power Handling (Pnom)(W) :
500
Sensitivity (2.83v/1m)(dB) :
84
Weight (M)(Kg) :
13.0
VC Diameter (mm) :
76 SV
DC (Re)(O) :
3.4
VC Length (H)(mm) :
46
VC Former :
BLACK
AL
VC Layers :
2
Magnet System :
Outside
Ferrite
Force Factor (BL)(TM) :
16.6
Gap Height (He)(mm) :
15
Linear Excursion (Xmax)(mm) :
15.5
•
TC Sounds Epic 10”
The EPIC 10" subwoofer is designed to be lighter, smaller and ultimately more affordable
without deviating from the TC Sounds world-class displacement and low distortion
performance guarantee. Matched with just 300 watts, the EPIC will surprise even the
most critical audiophiles with substantial, ultra clean low frequency bass, but pair it twice
that power and it will take you to the next level! Used by many high-end home audio
companies in their best products! Specifications: • Power handling: 500 watts RMS/2,000
watts peak • Le: 3.3 mH • Impedance: 2 ohms per coil x 2 • Re: 3.72 ohms • Frequency
range: 15 - 150 Hz • Fs: 24.3 Hz • SPL: 85.2 dB • Vas: 1.75 cu. ft. • Qms: 7.50 • Qes:
0.33 • Qts: 0.31 • Xmax: 22.9 • Dimensions: Overall diameter 10.97", Cutout diameter
9.26", Depth 5.62" • Weight: 21 lbs. Note: All specifications are with voice coils
connected in series.
•
•
•
•
•
•
•
•
•
High-temperature low eddy current stainless steel voicecoil former
2 + 2 ohm dual voicecoil
Light-weight Aluminum wire
8" linear spider suspension with large integral lead-wires
140 oz. magnet motor structure
Large 1" symmetrical XBR rubber surround for beyond 2" peak-to-peak travel
Large anti-flux-modulation shorting ring
Single dish aircraft-grade Aluminum alloy cone
High BL for efficient low-frequency performance and small enclosure designs
•
Scan-Speak Discovery 26W/4558T
•
•
•
Aluminium Cone, Black Anodized
Fiberglass/Paper Sandwich Dust Cap, Black Coated
56 mm peak excursion – 25mm linear (X-max)
•
•
•
•
•
•
•
Aluminum Short Circuiting Ring
Aluminum Pole Piece Extension to reduce distortion and power compression
Titanium Voice coil former
Vented cone / dustcap
Nomex spider
Low damping rubber surround
Litz wire woven into the spider
Suggested box alignments:
Sealed box of 0.5 cubic foot for use in autosound systems.
One cubic foot box with matching 26W/0-00 passive radiator for use in home or
autosound systems. For home, it would be best to use a plate ampfier with a boost. If
using our KG5230, your F3 is 35Hz.
Two cubic feet with a 3" diameter vent by 12" long for an F3 of 30Hz. I think using an
amp boost in this box would make it too boomy.
SB Acoustics 10” Woofer
SB
•
10” SB29SWNRX-S75-6
10.0
Preliminary data
145
290.0±0.5
10.50
246.5
885.50
268.0±0.10
119
45
(Mic Distance 31.6 cm; 2.83 Volt; at IEC Baffle)
Response Curve :
------ (Blue) : on axis
------ (Green) : 30 off-axis
------ ( Red ) : 60 off-axis
Specs :
Nominal Impedance
6!
Free air resonance, Fs
20 Hz
DC resistance, Re
4.5 !
Sensitivity (2.83 V/1m)
86 dB
Voice coil inductance, Le
Mechanical Q-factor, Qms
6.7
Effective piston area, Sd
3.0 mH
312 cm2
Electrical Q-factor, Qes
0.33
Voice coil diameter
75.6 mm
Total Q-factor, Qts
0.31
Voice coil height
28.5 mm
Moving mass incl.air, md
132 g
Air gap height
6 mm
Force factor, Bl
15.1 Tm
Linear coil travel (p-p)
22 mm
Equivalent volume, Vas
66 liters
Magnetic flux density
0.63 T
Compliance, Cms
0.48 mm/N
Magnet weight
2.1 kg
Mechanical loss, Rm
2.5 kg/s
Net weight
5.38 kg
Rated power handling
200 watt
The parameter are measured on drive units that are broken in
•
Dayton Audio RSS265HF-8
The Dayton Audio Reference Series subwoofers take the quality and performance of
the much acclaimed RS line into the subwoofer realm. As with the rest of the
Reference Series, the main focus of the RSS265HF-8 10" subwoofer is ultra-lowdistortion. Second, third, and intermodulation distortion are kept extremely low by
utilizing three short-circuit paths within the motor structure. A durable aramid fiber
spider and extensive venting throughout provide quiet and uniform excursion. The
black anodized cone, rubber surround, and custom basket give this driver a unique,
high-end look. Choose this High Fidelity (HF) version for home speaker systems when
your priority is clean, low bass and you are not restricted by cabinet size.
distortion. Second, third, and intermodulation distortion are kept extremely low by
utilizing three short-circuit paths within the motor structure. A durable aramid fiber
spider and extensive venting throughout provide quiet and uniform excursion. The
black anodized cone, rubber surround, and custom basket give this driver a unique,
high-end look. Choose this High Fidelity (HF) version for home speaker systems when
your priority is clean, low bass and you are not restricted by cabinet size.
Specifications: *Power handling: 350 watts RMS/600 watts max *VCdia: 2-1/2" *Le:
1.48 mH *Impedance: 8 ohms *Re: 6.17 ohms *Frequency range: 25 - 1,000 Hz *Fs:
25 Hz *SPL: 83 dB 1W/1m *Vas: 1.82 cu. ft. *Qms: 2.89 *Qes: 0.60 *Qts: 0.50 *Xmax:
14 mm *Dimensions: A: 10-1/2", B: 9-1/4", C: 5".
•
•
•
•
•
Extensively vented motor eliminates power compression and allows quiet
excursion
Lighter-weight black anodized aluminum cone minimizes moving mass
2-layer coil for reduced back EMF
Triple shorting-ring motor for ultra-low distortion
Optimized for large enclosures
Highest quality materials throughout for long-lasting performance
•
Dayton Audio Titanic MkIII
•
uilding on the reputation of the 10" MKII subwoofer, the MKIII sub excels at producing
very clean and musical bass in a small enclosure. Reaping the benefits of the MKIII
improvements, this woofer is now even better for medium-duty home theater applications
in small-to-medium sized rooms. The small 10" size is perfect for multi-driver or multisubwoofer situations. With an upgraded 2-1/2" voice coil and 18.7mm of Xmax this
subwoofer is great for home and automotive applications in both sealed and vented
enclosures.
•
•
•
•
•
•
•
Power handling: 400 watts RMS/565 watts max
Impedance: 4 ohms
Fs: 30 Hz
Xmax 18.7mm
Sensitivity 88 dB 2.83V/1m, 85 dB 1W/1m
Vas: 1.0 cu. ft.
Qts: .44
Titanic MKIII Subwoofers!
The best just got better! We took our popular Titanic MKII Subwoofers and made them
even better! Our main goal was to create subwoofers that produce deep clean bass, have
high power handling capabilities and long term reliability. The new Titanic MKIII
Subwoofers exceeded all of our expectations. These drivers will work well in both vented
and sealed enclosures, and with their unique VCSTM cooling system, copper shorting
ring, and 2-1/2" diameter voice coils, they can handle even more power to produce higher
output levels with less distortion! We've used the finest materials available to ensure that
each driver is built to the highest quality standards for long-term trouble-free performance
even under extreme sound
pressure levels!
A. Rigid Cast Frame
The cast aluminum
basket features
aerodynamic
supports that
provide maximum
rigidity for the motor
structure without
impeding air
movement from the
rear of the cone or
causing unwanted
reflections. The
mounting flange
features a thick
rubber gasket that not only provides an air tight seal but also looks cool!
B. Ultra Stiff Composite Fiber Cone
The cone is manufactured using the finest grade pulp reinforced with Kevlar fibers
and sealed with a polymerized coating. The result is a very stiff cone that remains
stable even under the stress of very high sound pressure levels.
C. Butyl Rubber Surround
A large roll surround is used so the suspension has the travel to handle the long
excursions that this driver is capable of producing. The surround is made of
durable Butyl rubber for long-term stability and reliability. The thickness of the
surround was precisely calculated to eliminate the possibility of "suck back" in
small enclosures, while still providing good linearity.
D. Ventus Cooling System (VCS)
This unique cooling system utilizes a vented spider and pole piece. As the cone
moves in and out, air is drawn across the voice coil and through the motor
structure greatly improving its thermal capacity thus reducing distortion and power
compression. The harder you push the driver, the greater the cooling effect!
E. Copper Shorting Ring
A copper ring has been added to the pole piece to counter the effects of back
EMF (electromotive force), resulting in reduced second harmonic distortion. By
locating the shorting ring at the top of the pole piece, we also get the added
benefit of reducing the effective voice coil inductance.
F. Optimized Motor System
The motor system features double stacked magnets and an extended pole piece.
It was optimized using FEA (Finite Element Analysis) to ensure a strong
symmetric magnetic field in the air gap. The double-stacked magnets ensure there
is plenty of clearance to prevent the long-excursion voice coil from bottoming. The
motor system also features a long 2-1/2" voice coil, which is wound on a Kapton
former for improved heat dissipation and higher power handling.
G. Flat Progressive Nomex Spider
This proprietary spider is made from high tech Nomex blended material for long
term stability. It provides a uniform restoring force throughout its normal range of
travel. As the driver nears its maximum excursion the spider gets "progressively"
stiffer. This prevents the voice coil from accelerating out of the magnetic gap
during high output peaks reducing distortion and possible voice coil bottoming.
This unique spider also has the heavy gauge voice coil leads stitched or "snaked"
through the spider. This eliminates "lead slapping" during
extreme excursion.
•
Seas Excel W12CY-00
8 Ohms
NOMINAL IMPEDANCE
WOOFER
W12CY001
E0021
RECOMMENDED FREQUENCY RANGE
SHORT TERM MAXIMUM POWER *
LONG TERM MAXIMUM POWER*
CHARACTERISTIC SENSITIVITY (1W, 1m)
OPERATING POWER ( 96 dB SPL ,1 m )
VOICE COIL DIAMETER
VOICE COIL HEIGHT
AIR GAP HEIGHT
LINEAR COIL TRAVEL ( p-p )
MAXIMUM COIL TRAVEL ( p-p)
MAGNETIC GAP FLUX DENSITY
MAGNET WEIGHT
TOTAL WEIGHT
60-3500 Hz
200 W
70 W
85 dB SPL
12.5 W
26
12
mm
mm
6.0
6.0
mm
mm
9
1.10
0.42
1.21
mm
T
Kg
Kg
VOICE COIL RESISTANCE
VOICE COIL INDUCTANCE (EQUIVALENT)
FORCE FACTOR
FREE AIR RESONANCE
MOVING MASS
AIR LOAD MASS IN IEC BAFFLE
SUSPENSION COMPLIANCE
SUSPENSION MECHANICAL RESISTANCE
EFFECTIVE PISTON AREA
VAS
QMS
QES
QTS
5.6 Ohms
0.3 mH
5.6 N/A
46 Hz
7.0 g
0.2 g
1.7 mm/N
1.0 Ns/m
50 sq.cm
5.8 Litres
2.2
0.37
0.32
* IEC 268-5
Response curve recorded in anechoic chamber (Free-field, 4 pi radiation) with 0.5m microphone distance.
The loudspeaker is mounted in a closed box of 2.5 l net. volume
The W12CY002 is a 12cm (4,5'') cone driver developed for use as a high fidelity woofer/midrange unit.
The extremely stiff, yet light cone gives tremendous bass precision and midrange detail.
SPECIAL FEATURES:
Precision cast and surface treated magnesium cone coupled to a natural rubber surround showing no
sign of midrange (edge) resonances.
Distortion on axis in % between 25 and 2000 Hz at operating power.
Perfectly matched moving parts for a smooth, extended frequency response.
Heavy copper rings mounted above and below the T-shaped pole piece, to reduce non linear and
modulation distortion and increase overload margin.
An extra large magnet system for good sensitivity and transient response.
Copper plating of the top and bottom plates and a solid copper phase plug, which enhance the
performance of the copper rings and improve heat conducion away from the pole piece.
Gold plated terminals mounted on a stiff bakelite plate to reduce contact resistance and improve
reliability.
Extremely stiff and stable injection moulded metal basket to keep the critical components in perfect
alignment. Large windows in the basket both above and below the spider to reduce sound reflection, air
flow noise and cavity resonance to a minimum.
JAN. 01
EW 12-001
•
Morel EW428
!
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Eton 4-200/A8 Symphony
4-200/A8/25 HEX
Symphony
5
62
Ein 100er Mitteltöner mit Aluminium-Spulenträger,
wurde für höchste Ansprüche entwickelt.
Eine dreischichtige Hexacone-Sandwich-Membrane
bekannt für ihre hervorragenden akustischen Eigenschaften
ist die beste Voraussetzung für eine authentische Musikwiedergabe.
91
96
116
•
An advanced high end 4" midrange woofer,
especially designed for full midrange performance,
as well as an ideal solution for multichannel systems.
For the hexacone sandwich diaphragm a three-layer
sandwich cone is used for extra rigidity and small weight.
It impresses by a totally realistic sound reproduction.
6x ø4,6 / ø108
Dimensions in mm
The frequency responses measured free field sound pressure
in 0, 15 30 degrees angle using endless baffle.
Input 2,83 VRMS, microphone distance 1 m
Impedance is measured free air without baffle.
Nominal impedance
Zn
8
!
DC resistance
Re
6.0
!
Resonance frequency 1W
fr
78
Hz
Resonance frequency
TS-parameter-meas.
fr
92
Hz
Suspension compliance
C MS
0.47
mm/N
Mechanical Q
Q MS
2.35
Electrical Q
Q ES
0.51
Total Q
Q TS
0.42
Mechanical resistance
R MS
1.55
kg/s
Total moving mass
(including air mass)
M MD
6.26
g
Effective piston area
SD
55
cm²
Voice coil diameter
25
mm
Voice coil former
Aluminium
Voice coil length
10
Voice coil layers
2
Voice coil inductance
Le
0.42
mH
Flux density
B
1.15
Tesla
Force factor
BL x l
6.47
Tm
Height of the gap
6
mm
Diameter of magnet
90
mm
Height of magnet
17
mm
Weight of speaker
1.1
kg
Characteristic SPL
1 Watt / 1 m
88
dB SPL
50
W
2.02
dm³
Rated power
Equivalent air vol.
of suspension
V AS
ETON reserves the right to change technical data
Distortion 1 Watt.
mm
07/20
ETON - GmbH - Pfaffenweg 21 - 89231 Neu Ulm - Germany
Phone +49 731 70785-20
Fax +49 731 70785-10
www.etongmbh.com [email protected]
•
Fostex FX120
FX-series
FX120
Features
!120mm (5 in) cone type full range
!8 ohm impedance
!fo to 20kHz frequency response
!89dB sensitivity at 1W/1m (3.3ft)
!1.32kg (2.910 lb) net weight
Specifications
&
Thiele/Small Parameters
Impedance
: 8 ohm
Minimum Frequency Response
: 65Hz
Frequency Response / Impedance
110
100
90
80
Reproduction Frequency Response
: fo - 20kHz
70
S.P.L.
Rated Input
50
(db)
: 89dB/W (m)
: 10W
Music Power
: 30W
Equivalent Diaghram Radius
: 46mm (1.811 in)
Equivalent Mass
Magnet Weight
: 5.3g (0.012 lb)
: 330g (0.728 lb)
Net Weight
Fs
Re
Qts
:
:
:
:
Qms
Qes
: 8.4
: 0.47
Vas
Xmax
no
: 8.21 L
: 2.0mm (0.079 in)
: 0.4%
1.32kg (2.910 lb)
70Hz
7.3 ohm
0.45
300
600
60
Ω
64
32
16
8
Impedance
4
20 Hz
50
100
200
500
1000
2000
5000 10000
Dimensions & Mounting Information
20000
•
Fostex F120A
F-series
F120A
Features
!120mm (5 in) cone type full range
!8 ohm impedance
!fo to 20kHz frequency response
!89dB sensitivity at 1W/1m (3.3ft)
!2.0kg (4.409 lb) net weight
Specifications
&
Thiele/Small Parameters
Impedance
: 8 ohm
Minimum Frequency Response
: 65Hz
Frequency Response / Impedance
110
100
90
80
300
Reproduction Frequency Response
: fo - 20kHz
70
S.P.L.
Rated Input
50
(dB)
: 89dB/W (m)
: 10W
Music Power
: 30W
Equivalent Diaghram Radius
: 46mm (1.811 in)
Equivalent Mass
Magnet Weight
: 4.7g (0.010 lb)
: 211g (0.465 lb)
Net Weight
Fs
Re
Qts
:
:
:
:
Qms
Qes
: 3.1
: 0.51
Vas
Xmax
no
: 9.876 L
: 1.5mm (0.059 in)
: 0.613%
2.0kg (4.409 lb)
65Hz
7.0 ohm
0.44
60
60
Ω
64
32
16
8
4
0
Impedance
20 Hz
50
100
200
500
1000
2000
5000 10000
Dimensions & Mounting Information
20000
•
Morel CAW428
•
Audax HM100C0
•
Seas Prestige L12RCY/P
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•
Fountek NeoCd1.0
NeoCD1.0 Ribbon Tweter
Specifications
Ribbon material Enforced sandwich
Ribbon mass
10mg
Ribbon dimension
8mmX38mmX0.17mm
Ribbon area
304square millimeter
Gap flux 0.55 Telsa
Gap height 10mm
Impedance 5 Ohm
DCR 0.02 Ohm
Frequency response 1,600~40,000Hz
Sensitivity [email protected]@1M
Power handling 12W Nominal, 25W Max
Recommended crossover frequency
3,000Hz / 2nd-Order
www.fountek.net e-mail: [email protected]
Tel:+86-83019220 Fax: +86-83019221
•
Aurum Cantus APR2.1
•
If you are looking for Aurum Cantus ribbon tweeter quality in an easy-to-mount
format, the APR2.1 is what you need. Its outstanding accuracy and extended
frequency response are identical to the rest of the Aurum Cantus tweeter family,
but now in an easy to flush mount version. Good partner for a single high
efficiency midwoofer. Hand-made aluminum foil planar hexangular honeycomb
diaphragm. Specifications: *Power handling: 30 watts RMS/45 watts max
*Impedance: 6 ohms *Frequency range: 1,700-30,000 Hz *SPL: 92 dB 1W/1m
*Recommended minimum crossover frequency: 2,500 Hz *Dimensions: A: 45/16", B: 3-3/16" x 2-3/16", C: 3-1/4".
•
Tang Band RT-1516SA
•
The Tang Band RT-1516SA ribbon tweeter features very high sensitivity (95 dB
1W/1m) combined with very low distortion, enabling articulate and detailed HF
reproduction. A neodymium motor structure provides high flux density that helps
to extend frequency response to 40 kHz. Low mass aluminum foil diaphragm,
integrated impedance-matching transformer. Specifications: *Power Handling: 8
watts RMS/80 watts max *Impedance: 8 ohms *Re: N/A *Frequency range:
2,000-40,000 Hz *Fs: N/A *SPL: 95 dB 1W/1m *Dimensions: A: 4.33", B: 3.0" x
1.85", C: 4.17".
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Aurum Cantus G2
Aurum Cantus is a trusted name when it comes to ribbon tweeters, and leads the
industry with its neodymium-driven ribbon technology. Each tweeter utilizes a
lightweight, pure aluminum diaphragm to provide great high-end extension, exceptional
detail, and quick transient response. The G2 features superior damping in front of and
behind the diaphragm for smoother overall response and greater low-frequency
extension. Specifications: *Power handling: 40 watts RMS/60 watts max *Impedance: 8
ohms *Frequency range: 1,700-40,000 Hz *SPL: 96.0 dB 2.83V/1m *Recommended
minimum crossover frequency: 2,500 Hz *Dimensions: A: 4-3/4" x 2-15/16", B: 3-1/2" x
2-3/16, C: 3-1/4".
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Compact design is perfect for two-way systems
Excellent high-frequency extension, can be used as a supertweeter
High sensitivity is great for efficient designs
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LCY-110
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110mm Round Flange
Frequency Response : 2KHz-60KHz
Sensitivity : 92dB / 2.83V / 1M
Nominal Impedance : 8Ω
Magnet Type: Neodymium magnet
Ribbon Effective Area : 740mm2
Ribbon Thickness : 0.006mm
Nominal Power Handling : 150W
Weight : 1.05Kg
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The LCY Ribbon tweeter is based on technology well proven by audio pioneers
for over half a century but is innovatively designed to satisfy the sophisticated
demands of the digital era.
The LCY has a unique design employing twin ribbons of half the length of
conventional ribbons in order to control vertical plane dispersion. Thus it
reproduces both vertically and horizontally as effectively as voice-coil operated
dome tweeters but with the accuracy, elegance and refined timbres of ribbontweeter technology. Magnetic flux density is enhanced by the use of our own
neodymium magnet system and a sophisticated transformer with parallel multiwiring OFC has been adopted for superior frequency and power handling and
optimal size.
Dimensions:
Flange: 110mm diameter
Cut out: 86mm x 58mm -or- 99mm diameter
Depth: 86mm
Flange thickness: 10mm
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Fountek NeoCd3.0
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Fountek NeoCd3.0MS 3" Ribbon Tweeter
Rectangular metal face plate, silver finish
Flange is 115mm tall by 75mm wide (4.52" x 2.95")
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Cut out is 88mm x 61mm (3.46" x 2.4"), Depth is 2.7"
Super strong Neodymium magnets
Build-in impedance conversion transformer
Effective from 1,400Hz upwards due to the large diaphragm area and low selfresonance.
Thin enforced sandwich ribbon diaphragm guarantees a high degree of signal
fidelity and broad frequency response.
Low distortion factor, good power-handling capabilities, high linear impedance
and amplitude frequency response and the broad frequency response range.
Flat impedance from 1,000 to 40,000Hz
Factory matched pairs: Although these are sold each, when you order two you
will receive a matched pair.
Specifications
Ribbon material: Enforced sandwich
Ribbon mass: 18mg
Ribbon dimension: 8mmX60mmX0.02mm
Ribbon area: 480square millimeters
Gap flux: 0.6 Tesla
Gap height: 3mm
Impedance: 7 Ohm
DCR: 0.02 ohm
Sensitivity: 95dB/M/W
Frequency response: 1,400~40,000Hz
Resonance frequency: 400Hz
Power handling: 17W Normal, 40W Max
Recommended crossover frequency: 2,500Hz / 2nd-Order
Warning:
Ribbon tweeters should always be used with a passive crossover!
Do not test without a capacitor.
Tweeters are repairable at Madisound for a very reasonable price. Call us to
make arrangements.
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