Scientific Design Software

– for better speaker designs
Magnet System & Voice Coil Design Program
The FINEMotor program is the unique simulation tool for
prediction of SPL & T/S parameters including Xmax and wire
diameter. FINEMotor is also the unique simulation tool for
designing the magnet system, voice coil and spider for woofers,
domes, telephone-receivers, headphones etc.
Neodym U-cup system with
min dimensions, to avoid
Precise and Fast
When SEAS was designing a new product line and used
FINEMotor for the first time, the result was right on target and
saved them a lot of time. After this first attempt SEAS now works
with FINEMotor for all new motor systems.
Material database
With the latest version of FINEMotor you can add your own
magnets and wires to the database, which already has a lot of
standard Chinese materials to choose from.
Special Features:
•Accurate prediction of SPL, T/S parameters and winding data
•Round and edge wound copper, aluminium and CCAW wires.
•Fs is calculated from Cone Fo and spider deflection/ Resonance/
•Ferrite, neodymium and user specified magnetic material
•Automatic magnetic compensation of air gap for larger wires
or multi-layer VC´s
•Twin voice coil 2+2 layers in parallel
•Shielded/unshielded – only one button
•Saturation shown in top plate, pole and
back plate
•Qms is estimated by including VC
former losses for Alu or Kapton
•Selection between steel or non-steel
•Updated internal flux models: T-Pole,
extended Pole
•Up/down offset of Voice coil now
FINEMotor Main Screen
FINEMotor™ Examples
New designs:
•You can design an 8 inch long throw subwoofer with shielding
and for instance a Qts=0.33, plus calculate the spider deflection
+ stiffness to get Fs=28Hz. The program gives you all winding
data for the 3.35 ohm Voice Coil.
•Design a given size motor and get maximum BL, even when
using a steel frame.
•With FINEMotor you can check the symmetry of the woofer
magnet gap flux and move the Voice Coil up/down to find the
best position. Calculate BL(x) at for example 2 and 5mm above
and below the air gap.
•Design an optimum one layer Copper Clad Aluminum Voice
Coil for a compression driver
Modifications of existing designs:
•You want to try a long 4 layer Voice Coil, but don’t know how
to predict the BL and Qts because the air gap is changed?
Just input the 4 layers and the clearance you want between
Voice Coil and top plate. FINEMotor will give you a choice of
solutions with increasing Xmax. Just pick the one you want
and all winding data + motor dimensions are calculated for
•Add shielding cup + rear magnet to a woofer without changing
the TS parameters.
•Optimize the sensitivity of a neodymium dome tweeter by
using the best neodymium disk size.
Problem solving:
•Our current woofer is very good, but has too low impedance
for our amplifier. Here you can modify the Voice Coil and motor,
and still keep the TS parameters.
The voice coil, indicated
by the yellow lines, is
offset +1.87mm (down).
All T/S parameters are
recalculated instantly.
Acoustic Finite Element Dome/Cone Simulation Program
The FINECone program gives you freedom to use your time and
creativity to design better loudspeakers. Within seconds you can
calculate the Frequency Response for a new driver or analyse
your problems with an existing driver. FINECone can drastically
reduce time-to-market for new products.
1 inch Aluminium Dome with
problem at 15 kHz. Simulated response
Save Engineering Time
High accuracy calculations in FINECone only take 5-30 seconds.
Save Tooling & Costs
FINECone predicts the performance so well that you only need
to build one prototype instead of trial-and-error experiments.
Better Products
FINECone 3D animation
shows mode at 15 kHz
Use the Material Database to find the best driver components
and optimize the cone thickness or stiffness that fits your exact
Problem free production
Optimising the development process streamlines the
production so you don’t have to spend your time firefighting.
New Features
•DXF error tracking
1 inch Aluminium dome
with solved problem at 15
kHz, by adding glue joint.
Simulated response
•Export of response curves with phase
•Automatic air load calculation
•Frequency response over plot
•Library of DXF and FINECone models
• Import of TS parameters from FINEMotor
• Undo in 10 levels
• Improved whizzer cone calculation
• Chinese interface
FINECone 1 inch Alu Dome Break-up mode @ 26451 Hz
FINECone™ Examples
New Designs:
In the design process for a completely new woofer the cone and
surround is a big challenge, because the response is not known
and no dimensions exists.
With FINECone this situation is elegantly handled and the user
can quickly simulate many different cone shapes, and play with
thicknesses etc. plus surround roll dimensions as well as dust
caps, glue joints and even voice coil former materials.
FINECone Simulated and
Measured 6” Woofer
The design of dome tweeters is even more demanding, but
not with FINECone. Here you can simulate the thinnest dome
diaphragm up above 50 kHz and optimize the dome and
surround shape, as well as a very thin glue joint.
Modification of existing designs:
If you are not satisfied with a standard product you can simulate
it in FINECone and find out what can be improved. It is very easy
for example to change the cone material to Kevlar, Titanium or
even more exotic materials like Beryllium.
FINECone mode @ 1308Hz
Problem Solving
Maybe you have designed a nice looking woofer with an inverted
dust cap, but unfortunately with bad response already around
1300 Hz. By exporting the response to FINE X-over we find that
the x-over cannot remedy this problem. However the FINECone
simulation shows that the surround is the problem. The simulated
solution is found easily and corrects the problem fully.
Simulation of Improved
Another example is a Chinese made Silk Dome Tweeter which
has a response problem at 7 kHz. The simulation revealed that
the dome edge and surround was breaking-up at this frequency.
A possible solution was an additional glue joint to stiffen the
edge. However that adds mass giving a lower SPL. A better
solution was found by changing the bad geometry to avoid the
problem without loss of efficiency.
Simulation of Improved
FINE X-over™
X-over Simulation Program
Our customers are extremely impressed with Fine X-over 3.1.
It is amazingly fast to use and has a clean uncluttered user
interface. But best of all: it will cut down your development time
with many hours per day.
You can see the response change immediately by rolling the
mouse-wheel through standard E24 components.
Or let the intelligent optimizer find the best flat response while
keeping the minimum impedance and calculating the real power
in all components.
•Intelligent optimizer for response and minimum impedance
•Response will change immediately when rolling the mousewheel through standard E24/E12… components
•Automatic power calculation of each component
•Preview of LMS, MLSSA, CALSOD, SOUNDCHECK…..driver
response and impedance files
•Asymmetric LP and HP filter slopes in Band-pass
•Additional components for baffle compensation etc.
•Cascaded sections i.e. 2.
woofer can be tapped from
1. woofer
•Variable target with slopes
•Both ON- and OFFaxis responses can be
optimized at the same time
•Chinese user-interface
You can see the response change immediately by rolling the
mouse-wheel through standard E24 components.
FINE X-over Examples
New Designs:
Simulate a completely new x-over using the real measured
responses from prototypes. Or simulate the x-over with
simulated responses from FINECone even BEFORE building the
first prototype!
Use FINE X-over to simulate 1st/2nd or up to 4th order x-over
with or without compensation networks. The program will
automatically indicate which components are redundant, and
thereby save component costs.
FINE X-over driver input
The Network Power feature is used to calculate the (IEC) power
in all drivers and components in order to avoid overload in the
finished x-over.
The intelligent optimizer will optimize BOTH frequency response
AND minimum impedance to avoid too low impedance at any
frequency, for protecting your amplifier.
SPL + Imp optimization
Modification of existing designs:
What if the production woofers or tweeters show a different
average frequency curve? Import the actual driver response
average from FINELab (Auto-saved in Statistics), and check
the deviation from the original response in FINE X-over. Now
you can optimize the x-over to give the same response with the
production drivers.
Tweeter power calculation
You may find out that the component values in your x-over are
not available in time for production? Just input the available
values and re-optimize frequency response and minimum
impedance once again.
Problem Solving
Having problems in the field with burned tweeters? Redesign
the x-over in minutes to lower the power in the tweeter without
sacrificing the good response you had before.
Customers complain that your loudspeaker system is causing
problems with certain amplifiers? Redesign your x-over by using
the button “New based on this” and optimize the system with
increased (minimum) impedance.
Non-Linear High Power Enclosure Simulation Program
FINEBox is the ideal program for optimizing your loudspeaker
system at high power. Use the mouse wheel to tune the Volume
or Port (FB) in a bass Reflex or Band pass system.
You can even simulate the Voice Coil temperature and
Compression at high power in Closed Box, ABR, Bass Reflex,
Band pass and InterPort systems.
The “Time Curtain”.
Import measured and simulated FSIM and TXT responses from
most other systems including FINELab.
Splice imported responses with FINEBox curves and match SPL
if needed.
The “Digital Clock”.
•Closed Box, ABR, Bass Reflex, Band Pass, InterPort systems
are calculated
•3D Display with “Glass” layer Time Response selection
•All Non-Linear T/S pars including thermal data can be imported
from FINEMotor
•Power compression is calculated at any power level and time
The “Thermal Model”.
•View Cone Displacement, Reflex and InterPort speeds at any
power level
•Advanced Thermal model
predicts heating of voice coil
and motor
•Export simulated and spliced
•FINEBox is unique because
you can input any TS
get the bass response of a
bass reflex system, ABR or
Bandpass etc.
•Peter Madsen
Audio UK says:
FINEBox. Lower display showing spliced response (Blue)
“You can change the TS
parameters in FINEBox until
you get the bass response
you want! Then build a
new woofer with these TS
parameters and you have the
perfect loudspeaker.”
Production Test System
The FINE QC test equipment is developed as a natural addition
to the simulation programs from LOUDSOFT: FINEMotor,
FINECone, FINEBox and FINE X-over. The FINE QC system will
share data with the other FINEPrograms and works with the
intuitive LOUDSOFT user interface.
The FINE QC production test system is developed to be powerful
and efficient. You can use the test system for even the smallest
Danish microphone
•Very fast test execution with CHIRP
•USB Interface
•Robust and reliable
•Extremely easy-to-use
•Different response limits (adaptive)
•Rub and Buzz test
•SPL, Impedance, T/S and Polarity measured at the same time
•Automatic daily average
•Automatically finding “Golden” average driver
•Available Danish electret microphone
•Files to FINECone and FINE X-over
Measuring box with USB and Built-in 25W amplifier + 48V Phantom
Time Domain and Tolerances
All Acoustic testing can be performed with FINE QC. Receivers
for mobile phones, headphones, Loudspeaker Systems,
Woofers and Tweeters etc. can be tested in seconds with very
high accuracy.
You may select a standard template with tolerances relative to
your measured reference, and/or modify the limits by mouse
dragging, for example to allow more space for the natural
variation of a steep slope in the frequency response.
Mobile Receiver and
Headphone Testing
The engineer can specify an average sensitivity over a defined
frequency band and Floating Frequency Limits can be controlled
by the Sensitivity +/- limits.
FFT Time Window with
Woofer QC Testing
FINE QC Tolerance Limits–Relative from Reference and
with Dragging +Templates
FINE QC “Golden Average Driver”
End of Line QC-Testing with
FINE QC ”Golden Average Driver” Auto Finder in Pre-production. This feature
can also be used to match Drivers or Speaker systems.
All measurements can be
exported from FINE QC.
Here are two woofer
responses imported into
When starting a new production, the most important is to find
the unit which is closest to the average of the good units, so it
can be used as reference.
A pilot run consisting of 17 woofers for a 2-way system, were
sorted using the automatic Preproduction Feature, see the
Figure above. The highlighted driver response (yellow) is Serial
No.8 in the table and is the best match to the average i.e. the
Golden Average Unit.
TS-Parameters are measured with curve-fitting using
the same level (current) as
SPL measurements
Note that driver No. 7 was deselected in the table because that
response was considered non-typical and should not disturb the
Should it be necessary to find a similar reference driver later, that
can be found by selecting “Best Match to Reference”.
The preproduction feature can also be used for "Pair Matching"
of loudspeaker systems or drivers, or sorting of units with
different response variations.
FINE QC tests and statistics
FINE QC tests
You can use your own microphone with the FINE QC system,
or buy the inexpensive LOUDSOFT electret microphone. This
very high quality microphone is produced in Denmark and is
calibrated for the FINE QC system.
FINE QC statistics
The statistics collected by the FINE QC system is designed
in such a way that you automatically will get the average and
deviation statistics you need, no more – no less.
FINE QC tolerances
The QC system is optimized for production testing. It is extremely
fast and simple for the operator. If the tested loudspeaker is
outside the tolerances, you can see it with just a quick glance.
The new Rub & Buzz Method in FINE QC
This new detection method is based on the latest Danish research
on hearing mechanisms, using a completely new algorithm
to find the annoying sounds, which cannot be detected with
conventional methods like THD, high harmonics or IM distortion.
The signal is measured in the Time Domain, and a special
algorithm is applied to find the fast low level impulses, which
are normally masked by noise. Finally the result is filtered and
transferred by FFT to the frequency domain, whereby the Rub &
Buzz phenomena can be correlated with the actual frequencies.
FINEBuzz Detection of 1 tiny
Sugar Crystal
The new FINEBuzz method is extremely sensitive and can detect
even a small sugar crystal ticking on a loudspeaker cone.
FINEBuzz Features:
•Complete 100% End-of-Line Testing for all loudspeaker drivers
and cabinets
•Very fast in production, <1-2.5s
•Integrated in FINE QC™
•Will find all rubbing Voice Coils
”Anechoic” Testing of Speaker
Systems in normal room with
FINE QC. SPL with Limits,
Sensitivity, Impedance, Polarity
and Rub & Buzz is tested in one
measurement in seconds.
•Detects loose particles and even a small buzzing tinsel in a
•Detects subtle cabinet resonances and air leaks
•Uses the standard FINE QC™ hardware with built-in amplifier
FINEBuzz Detection of Rubbing Voice Coil in a Woofer
FINE R+D)) ™
Acoustic Measurement System
•Anechoic FFT measurements in rooms with Acoustic Auto-delay
•SPL/Frequency and Impedance responses with phase
•Multiple Display of 16 or more responses with up/down scroll
•Drag and Drop files from VACS, MLSSA, LMS and other
•THD + 2 – 9th harmonics
•Cumulative Decay Spectrum “Waterfall”
•Room measurements: 1/12 - 1/6 - 1/3 - 1/2 - 1/1 octave Smoothing
•Extended Low Frequency measurements
•Export of all measurements with phase in *.lab and *.txt format
(VACS / Klippel)
•Curve library of up to 50 curves/responses/TS parameters etc
•Thiele Small parameters: Fixed Mass/Delta Mass/Added Box
•Full System calibration incl. Microphone
•For Professional USB soundcards with Loudsoft/ASIO drivers
LOUDSOFT – for better speaker designs
Peter Larsen as an engineer
Peter Larsen has been working in the loudspeaker
industry since 1974. He started his career with
SEAS, was Chief Engineer for Vifa 1979-1987 and
for Dynaudio 1987-1990. Until 1993 he worked
with JBL in USA. From 1993 Peter Larsen has
worked as an independent consultant for leading
loudspeaker factories all over the world: Audax
in France, KEF Audio in UK, Goldmax in China,
Vifa-Speak in Denmark, Peerless Fabrikkerne of
India, and NXT in UK.
Peter has specialized in in-depth analysis of
loudspeakers and manufacturing techniques,
research concerning new components and
materials, advanced Acoustic Finite Element
modeling, new measuring methods, novel
speaker design concepts and development of
several customized products (private label).
Peter Larsen as a musician
For more than 35 years Peter has been singing in choirs. At
the same time he is a good piano player and he also plays the
trombone. Lately he has started to arrange music for the Quintet
he is playing with and he has performed on quite a few CD´s
during his time as a musician.
Peter has a very good ear for music and sound. That means
that he also has a good ear for loudspeakers
– which he has proved over the years.
Peter Larsen as an inventor
During the last 30 years Peter has designed
many new drivers for Dynaudio, JBL, KEF and other producers, but the most impressive
invention was the Ring Radiator: One Friday
afternoon he was working with a dome
tweeter, but it had problems. As he was tired
and frustrated, he took a big needle and
stuck it through the dome. The dome was
still able to play and the frequency response
was flat as a ruler up to the limit of the B&K
system. The Ring Radiator was born.
for more information
and download free
demos of the
– for better speaker designs
Agern Alle 3 – 2970 Horsholm – Denmark
Phone +45 4582 6291 – Fax +45 4582 7242
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