Electro-Voice Aristocrat, I, II, & III Datasheet

Electro-Voice Aristocrat, I, II, & III Datasheet
 МАУС
By HOWARD SOUTHER
Electro-Voice, Inc,
Construction details and performance data on a folded
corner horn enclosure. It will accommodate any high
quality, low resonant frequency, 12-inch loudspeaker.
HE mind through the ear delights
in the stimulus caused by sounds
which are mathematically related.
The generation of such sounds is
called music. It is generally conceded
that the widest variety of these sounds
causes the greatest satisfaction; thus,
we find that loudspeaker systems of
the widest response range are the
most pleasing, granting good source
material of low distortion as an un-
derstood prerequisite.
Where space is limited there is no
particular problem in achieving excel-
lent response in the treble ranges.
Generating mechanisms for producing
the rapid, delicate pulses of the higher
frequencies are inherently small in
themselves. But not so the bass range,
comprised of the first two octaves
from 30 to 120 cycles-per-second.
The area near a sound generator, in
this case the cone of a loudspeaker, is
what engineers term a region of high
acoustical impedance. To achieve use-
ful transfer efficiency of motion into
acoustical energy, we must build up
considerable air pressures.
To deliver these sound pressure
waves to the listening area, a region
of very low pressure or low acoustical
impedance, a transformer of some
kind is required, just as it is in an
electrical circuit.
The recognized scientific means of
accomplishing this transformer action
is through the use of a horn, This
horn must expand in area at a con-
stantly accelerating rate to accom-
plish its function, the ideal horn be-
ing one of infinite length and infinite
mouth size,
The Horn Design
This last requirement almost stops
the design project before it begins.
But let us examine first the require-
ments of a suitable horn. Fundamental
tones of even the largest bass instru-
ments, such as monstrous drums and
16 foot organ pipes, start at 30 cycles
per second. The mouth requirement
for a horn capable of reproducing a
30 cycle tone 15 М the wavelength of
this tone, or 111 inches. For a 50 cps
tone, this dimension decreases rapid-
ly to 80 inches.
The next thing to consider is the
length of the horn. 'The formula gov-
erning horn design says that the taper
rate, or the flare, governing the
expanding cross section of the
horn, shall double every 11% feet
of its length in order to reproduce a
30 cps tone at the mouth (whose
cross section we have already com-
puted to be 111 inches),
The Design Takes Form
Our design still has impossible di-
mensions for the living room; some-
thing having a length of 6 to 10 feet,
according to the throat size we select
at the start of the horn, and a mouth
10 feet across! On the other hand,
certain things are in our favor:
Ideally, the lowest tones in fre-
quency lend themselves easily to pro-
pagation in a closed cavity of a size
such as our living room. Examination
reveals a partial horn available in the
corner of the room, the mouth of
which is in most cases more than 111
inches across! Some years ago, Paul
Klipsch, the noted acoustics authority,
seized upon the idea of housing only
the throat of the required horn in a
furniture cabinet and placing it in
this corner. In the design of the
“Aristocrat,” we find that by keep-
ing the driver unit itself small, we
have such a throat assembly of very
compact proportions. There now re-
sults a clean, extended low-frequency
response to the 30 cps region, surpris-
ingly free from peaks and valleys in
its characteristic curve. But, although
the range is well extended and satis-
The E-V “Aristocrat” enclosure. The per-
formance data covered in article was ob-
tained using the E-V SP12-B ‘Radax” unit,
factory, the efficiency in the first oc-
taves is still too low to accomplish a
pleasing musical balance. This is true,
in the main, because our driving cone
is only a piece of parchment, and a
far cry from the ideal acoustical re-
quirement for a piston of infinite
lightness and infinite rigidity.
Building the Efficiency
By exploiting a phenomenon involv=
ing acoustic resonance, the efficiency
in the bass range may be augmented
as much as 4 to 8 times. Observe the
cross-sectional drawing of the “Aris-
tocrat”: By utilizing the reactance of
the small air mass directly behind the
speaker, in conjunction with the high
compliance or capacitive factor of the
specialized driver cone, the combina-
tion can be used to reinforce the sound
over a four-octave band with the large
air mass, due to the horn, which is
presented by the corner.
Performance
If the “Aristocrat” is carefully con-
structed, and care is taken to effect
a complete seal of the front baffle
board to prevent air leaks from front
to back, rather startling bass perform-
ance will be realized. Response range
will be as shown in the curve (Fig.
2) revealing a response within 3 db of
flat to about 30 cps. This operation
is supported by evidence disclosed in
the impedance characteristic (Fig. 1)
denoting a satisfactory reactive com-
ponent in the voice-coil system well
into the first octave. The high im-
pedance at 120 eps is fortunately not
reflected adversely in the frequency
response curve,
ile eee [O] (Bf
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HF PORT CAN 7
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3 5 { ul This cabinet design is quite flexible. It can be used with three speaker combinations:
E cu (1) A 12-inch full-range speaker alone. (2) A 12-inch unit with high-frequency horn and
E L : treble driver, and (3) A 12-inch coaxial type loudspeaker.
НЕ EE To achieve the unusual bass performance of which the enclosure is capable, the 12-inch
à а drivers should be good quality units having a free space resonance of 45-60 cycles. If the
ae IS E-V Model 8-HD horn is employed, it is supplied with the AK-1 mounting assembly. With
p= Re this horn o crossover network and treble driver unit are needed.
Rak e a - | Performance curves shown were obtained using an E-V Model SP12-B “Radax” coaxial
ee hrs oe S unit,
41
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FRÉQUEMST 6 ÉTÉLES PER SECOND
Fig. 2. Frequency response.
Fig. 3. Intermodulation distortion.
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BULLETIN MO, 175 ELECTRO-VOICE, INC. BUCHANAN, MICHIGAN
Reprinted courtesy Radio and Television News PRINTED IN U.S.A.
gy We, A
FA
“ Nyistona
Lowest price in any
commercially available
800 cps separate
2-way speaker system
New model 12BW
low-frequency driver
New model 8-HD
diffraction horn
SPECIFICATIONS: MODEL 128W
RTMA SENSITIVITY RATING; 45 db. INSTAN-
TANEOUS PEAK POWER INPUT; 25 watts.
CONTINUOUS PROGRAM LEVEL; 18 watts +
5 db to 35 cps in Aristocrat, 15 watts + 5
db to 40 cps on flat infinate baffle. FREE AIR
RESONANCE; 40 cps. BINDING POSTS; polar-
ized, red-positive, black-negative for forward
motion of cone with dry cell applied. IMPED-
ANCE; 16 ohms at 400 cps. DIMENSIONS;
1214" diameter, 63%" deep. MOUNTING
HOLES; Six 14" holes spaced 60° apart on
1115” circle. WEIGHT; Net, 9 Ibs., Shipping,
915 Ibs.
MODEL T-10 HIGH-FREQUENCY DRIVER
SPECIFICATIONS:
RTM A SENSITIVITY RATING; 45 db. MAGNET;
1 Ib. Alnico V. DIAPHRAGM DIAMETER;
113”. PEAK INSTANTANEOUS POWER INPUT;
above 800 cps, 30 watts, 20 watts contin-
uous program level, above 400 cps, 15 watts
program material. DC RESISTANCE; 10.5
ohms. IMPEDANCE; 16 ohms. RESPONSE
RANGE; + 3 db to 11,000 cps, with high
useable efficiency to 15,000 cps. THROAT
DIAMETER; "i". FUNDAMENTAL RESONANCE;
275 cps. DIMENSIONS; 415” diameter, 5”
deep. WEIGHT; Net, 8 Ibs., Shipping, 13 Ibs.
LIST PRICE, $67.50, Audio-phile Net, $40.50.
Conforming to the scientific rule which dictates a low crossover for maximum
cleanliness of reproduction, this System provides at low cost an inte-
grated 2-way speaker system with components designed for 800 cps
separate operation. The resulting cleanliness vastly exceeds the quality
associated with coaxial type speakers where a higher crossover must be
employed because of space restrictions within the cone. Yet—this repro-
ducing system requires actually but 314 inches more height than usual
coaxial speakers, and the flexible mounting board permits fitting into most
existing cabinets, either of the conventional reflex type, or of folded corner
horn types, such as the famous Electro-Voice ARISTOCRAT enclosure.
ARISTOCRAT I STANDARD, B00 CPS CROSSOVER, SEPARATE 2-WAY SYSTEM
Consists of Model 108 separate 2-way system package mounted, wired
and tested in Aristocrat enclosure ready for operation. Dimensions:
2915" high, 19" wide, 1615” high. Weight: Net, 68 Ibs., Shipping,
116 lbs. -
LIST PRICE in Mahogany Aristocrat, $299.00, Audio-phile Net, $179.40
LIST PRICE in Blonde Aristocrat, $309.00, Audio-phile Net, $185.40
component specifications
MODEL 108, 800 CPS CROS50VER, SEPARATE 2-WAY SYSTEM
An integrated high quality assembly of unusual range and cleanliness. Ideal
for custom-crafters. Fits readily in most existing cabinets, in a wall, door or
book-case. Consists of 12 BW LF driver, T-10 HF driver, 8-HD Hoodwin
diffraction horn, X-825 Crossover Network, black flat baffle with properly
cut ports for components, and AK-1 Accessory Kit containing all brackets
and mounting hardware complete. Dimensions mounted: 27" high, 18” wide,
1234" deep. Weight: Net, 33 Ibs., Shipping, 72 lbs.
LIST PRICE, $184.00, Audio-phile Net, $110.40.
MODEL 12BW LOW-FREQUENCY DRIVER
Designed especially for extended response at the extremity of the bass range,
the stiff straight sided 14 gram seamless, moulded and moisture proofed
cone prevents relaxation of the suspension material along its length. This
precludes the formation of spurious sum and difference tones caused by the
outer area moving at a slower rate than the central fundamentally excited
area. The heavy, totally enclosed Alnico V magnet fills the precisely ma-
chined gap of minimum dimensions with a high flux density of 10,000 lines
per square centimeter. This complete closure of the magnetic area prevents
distortion of 1'V pictures when the driver is used in proximity to the receiver,
The large 2" copper wound voice coil has an allowable excursion of over
14", guaranteeing high power handling capacity without “bottoming”
against flange of the highly permeable nosepiece.
LIST PRICE, $49.50, Audio-phile Net, $29.70.
MODEL X-825, BOO CPS, CROSSOVER NETWORK
Restricts low frequencies to the bass driver, allowing the high
frequency unit to operate only above 800 cps for minimum distor-
tion. Attenuation below 800 cps is 12 db per octave. Air cored
coil with Q of better than 150 is employed, along with paper type
condenser with generous overload factor. These prevent ampli-
tude distortion with varying load and frequency.
POWER RATING; 40 watts. INPUT, HIGH OUTPUT, LOW OUTPUT:
all 16 ohms impedance. DIMENSIONS; 715" long, 514” wide, 215"
high. WEIGHT; Net, 115 Ibs., Shipping, 3 Ibs.
LIST PRICE, $30.00, Audio-phile Net, $18.00.
MODEL 8-HD, 800 CPS, DIFFRACTION HORN
SPECIFICATIONS:
180° dispersion accomplished by diffraction principle. ACTUAL
CUTOFF; 600 cps. RECOMMENDED CROSSOVER POINT; 800 cps.
DRIVER MOUNTING; two 545-18 holes space 180° apart on 2°
circle. Accepts T-10 or T-25 drivers. DIMENSIONS; 314” high,
1414" wide, 714" deep. WEIGHT; Net, 114 Ibs., Shipping, 2 Ibs.
Response, impedance,
efliciency and distortion data
ELECTRO-VOICE is the only speaker manufacturer so far to publish authentic,
unretouched; machine-run response curves of its products. The industry in the past
has been reluctant to do this because the test conditions influence the character of the results.
Furthermore, it is recognized that the significance of curves leaves considerable to be
desired in the subjective evaluation of loudspeaker performance. A satisfactory degree of
correlation can be established by careful interpretation, however, and an attempt is
made to achieve this correlation in the short notes covering the measurements shown on
following page. Because the anechoic chamber does not permit the inclusion of the
walls of a room, the response curve is a composite of anechoic chamber above 100 cps,
and the simulated living room below this point. Observe that a 5 db dip is introduced in
the design exactly at 60 cps to reduce the effects of turntable rumble. Augmented
response in the“ presence” region 3-6 KC is satisfactorily introduced to offset ear insensitivity
at room reproducing levels. Sensitivity, or efficiency, is measured by the recommended
method established by the Radio and Television Manufacturers’ Association.
intermodulation distertion intermodulation distertien
aristocrat || system | aristocral | system
ЕН Qualitative
nN 5 = Measurements
x » = tio : SRE ti a.
E Е | ВНЕ ee An anechoic chamber of the di-
a SSL E Пра НОНО pen mension of 12" x 12" x 20", together
чат WATTS with a standard calibrated micro-
intermodulation distortion intermodulation distortion phone, Mode! T|-401 signal gener-
sp-12 redox sp 12-B radax ator and Model TI1-402 distortion
: sin ES analyzer were employed. For the
= intermodulation tests a carrier sig-
nal of 60 cps was employed, modu-
: = lated by 2, 7 and 12 KC with a
© бое: = ratio of 4:1.
* ES "ur: 6 20 0 0 в © EE ED e 40 co
- WATTS WATTS
response range response range
arisiocrat | system
ES
a co a
. die Quantitative
= : a
- Measurements
= The same anechoic chamber and
response range ssponte range microphone were employed. Im-
sp-12 radax sp 12-B radax pedance measurements were
made in a simulated living room
12" x 14’ x 9’, using a Ballantyne
Voltmeter across the voice coil
with 100 ohms in series.
Tolomeo
imped fF ari : e ; РЕЯ
A 12" E-V Drivers Although the most modern equipment was used in-this distortion analysis, ¡ts
value in measuring distortion products in loudspeaker systems is open to
considerable question. For instance, the only available and arbitrary modu-
lating frequencies could be the weakest points in the design distortion-wise,
and every other frequency point might be comparatively distortion free; thus
Ham la et a very fine speaker could show up poorly. The converse is also possible. For
00-30 40 50 Un. ¿00-200 ado. ' the arbitrary points shown, the distortion in these systems is unusually low
di Sr AES compared with other commercially available quality systems.
2 m
Te, EC ea ©
a
BD A -—#
© He №
Where the finest sources are available from FM and the high quality
vinylite recordings, the discriminating listener will be satisfied
with no less than the deluxe components of the ELECTRO-
VOICE Model 111 System, tastefully housed in the beautiful
ARISTOCRAT enclosure for top results. The more powerful 12W
Low-Frequency Driver is utilized for smoother, more efficient
bass reproduction. The T-25 High-Frequency Driver delivers
augmented signals beyond the frequencies found on most of the
finest source materials available today. The large 14 section
X-8 800 cps crossover network not only restricts bass tones to the
low frequency driver, but restricts also the high frequencies to the
treble driver. This subdues further the electro-mechanical
distortions of both transient and harmonic nature. In addition,
the combination of these elements diminishes the effects
of disagreeable intermodulation products.
ARISTOCRAT IIL DELUXE SEPARATE 2-WAY SYSTEM
Incorporates the Model 111 separate 2-way system pack-
age completely installed, wired and tested in the Aristo-
crat enclosure ready for operation. Dimensions: 2914"
high, 19” wide, 1644" deep. Weight: Net, 91 Ibs., Ship-
ping, 137 lbs.
LIST PRICE in Mahogany Aristocrat, $392.00, Audio-phile |
Net, $235.20.
LIST PRICE in Blonde Aristocrat, $402.00, Audio-phile
Net, $241.20.
model 111 separate 2-way
loudspeaker system
MODEL 111 800 CPS CROSSOVER SEPARATE 2-WAY SYSTEM
Consists of Model 12W Low-Frequency Driver, Model T-25
High-Frequency Driver, Model 8-HD, 800 cps, Diffraction Horn,
Model X-8, 800 cps, Crossover Network, Model AK-1
Accessory Kit of horn mounting brackets and necessary hardware.
Black flat baffle with properly cut ports for components fits
Aristocrat cabinet, or provides ideal assembly for custom
installation in doors, walls or existing cabinets. Dimensions:
27" high, 18” wide, 1314" deep. Weight: Net, 80 lbs., Shipping, 94 lbs.
LIST PRICE, $277.00, Audio-phile Net, $166.20
Deluxe 800 cps separate
2-way speaker system
New E-V Diffraction horn
for full 180° dispersion of
high frequencies
12" low frequency driver
with powerful 3 pound
magnet
25 watt treble driver
phantom view
aristocrat Il system
model 111
seporate 2-way system
component specifications- Mision I
MODEL 12W LOW-FREQUENCY DRIVER
Uses a heavy, straight-sided, 14 gram, ribbed 12" cone for maximum strength to prevent
diaphragm break-up. Magnet structure weighs 23 pounds and houses a large 3 pound
Alnico Y slug for high efficiency, Compliance of outer cone rolls and inner spider is care-
fully calculated for maximum extended bass range response. Maximum excursion ‘is 1”,
guaranteeing complete freedom from “bottoming” at full bass power. When the Model
12W is employed in the Áristocrat cabinet, the compliance is matched to the back cavity
air mass. This forms a broadly resonant circuit more than 3 octaves wide in combination
with the forward air load, resulting in efhcient, uncompromised response to within 5
db of flat at 35 cps.
LIST PRICE, $95.00, Audio-phile Net, $57.00
MODEL T-25 HIGH-FREQUENCY DRIVER
In order to reproduce the rapid delicate pulses of the upper octaves, the vibrating or
piston member of a high frequency driver must be light, and thus small. On the other
hand, to achieve useable power transfer the diaphragm assembly must be large and conse-
quently heavy. These irreconciliable requirements have limited the high range of driver
units in the past; the usual roll-off of a 40 wart 215" diaphragm being 3,000 cps, and that
of 25 watt 115" diaphragm about 4,500 cps. Resonance cavities are frequently introduced
to gain augmented response several thousand cycles higher, but with accompanying
raggedness in the reproducing characteristic and sharp attenuation after the resonant
peak. Another factor entering into this complicated design problem is the violent phasing-
out of the acoustic energy at certain frequencies. This phenomenon transpires when the
signal approaches in wavelength twice the diameter of the diaphragm. The unfortunate
circumstance thus experienced drastically affects listening quality, which demands a rise
of between 5 and 10 db in this region.
ELECTRO-VOICE high-frequency untis completely by-pass these seemingly unsurmountable design
difficulties! Louis Hoodwin, a brilliant physicist on the Electro-Voice Engineering staff, has
invented the unique loading device for the HF diaphragm, whereby the effect of diaphragm
mass is no longer a factor. The accompanying sketch shows that the usual cavity in the
piston region has been eliminated. The throat of the acoustic system begins directly al the
voce coil where iit is joined lo the diaphragm; thus, for the first time, a true scientific exponen-
tial flare takes place from the very origin of the seund source. This results in the greatest transfer
efficiency, and the smoothest, most extended high frequency response available on the
market today. The moulded phenolic impregnated linen diaphragm has tremendous
strength, and can be overloaded to the point of voice coil disintegration without fracture.
Furthermore, it is not susceptible to the radial splitting and buzzing common to delicate
aluminum diaphragms.
LIST PRICE, $95.00, Audio-phile Net, $57.00
MODEL 8-HD 800 CPS DIFFRACTION HORN
In order properly to load the driver diaphragm, an exponential horn is required of the
proper Hare. In addition, the high frequencies which would ordinarily beam straight
down the axis must be adequately dispersed in order to cover the entire listening area.
In the past this dispersion has been meagerly affected by a multiplicity of cells, each pin-
pointing a spot in the room, usually 8 in number. Each cell intercepts a solid angle of 20°
at about 2 KC; at 10 KC this angle is only about 10°. In keeping with the requirements
of the discriminating listener, Eleciro-Voice has developed the diffraction principle of high
frequency sound dispersion. The employment of this principle in the Hoodwin horn design
affects better than 180% of dispersion, sans all pinpointing effects, and does this with more
efficiency at all frequencies. The Model 8-HD horn, in addition, has a wide margin of
safety near the recommended crossover frequency of 800 cps; the horn is designed actually
with a 600 cps cut-off, thus, eliminating the response disturbances associated with opera-
tion too near the actual cut-off point. A most important feature of the Hoodwin horn is
the increased efficiency of 3 db, or double that of conventional cellular horns. This is
brought about by the elimination of the viscous resistivity of the air engendered by the
multiplicity of throats at the driver unit mouth. The horn design uses the new material
Fibreglas, noted for its fine acoustic properties and extreme ruggedness.
LIST PRICE, $27.00, Audio-phile Net, $16.20
MODEL X-8, 800 CP5, CROSSOVER NETWORK
Utilizes the standard circuit employed by the motion picture industry, the full m derived
Lg section configuration. Restricts low frequencies to bass driver and directs high fre-
quencies to treble driver. M is .6. Attenuation is 12 db per octave each side of crossover
point, presenting an optimum degree of attenuation with minimum possibility of transient
distortion generation. Utilizes air-cored coils to eliminate distortion with varying load and
frequency. Q is better than 150. Condensers are paper type with generous overload factor.
LIST PRICE, $50.00, Audio-phile Net, $30.00
SPECIFICATIONS: MODEL 12W
RTMA SENSITIVITY RATING; 48 db.
MAGNET; 3 Ib. Alnico V. MAGNET
STRUCTURE WEIGHT; 23 Ibs. RESPONSE
RANGE; +5 db down to 40 cps on flat
infinate baffle, + 5 db down to 35 cps
in Aristocrat Enclosure in average
living room. FREE AIR CONE RESON-
ANCE; 41 cps. BINDING POSTS; polarized;
red-positive, black-negative for forward
motion of cone with dry cell applied.
Cone moisture and fungi-proofed. IN-
STANTANEOUS PEAK POWER; 25 watts
on flat baffle, 30 watts in Aristocrat
cabinet. IMP; 8 or 16 ohms. CONTINU-
OUS PROGRAM LEVEL; 20 walls. DIMEN-
SIONS: 1214” diameter, 715" deep be-
hind mounting panel, 11“ baffle open-
ing, four 14” mounting holes spaced 90%
on 1115” circle, WEIGHT; Net, 25 Ibs.,
Shipping, 26 Ibs.
SPECIFICATIONS: MODEL T-25
RTMA SENSITIVITY RATING; 48 db. MAG-
NET; 134 |b. Alnico V. DIAPHRAGM DI-
AMETER; 115". PEAK INSTANTANEOUS
POWER INPUT; above BOO cps, 50 watts,
continuous program material, 25 watts,
above 400 cps, program material, 20
watts. IMP; 16 ohms. DC RESISTANCE,
10.5 ohms. FUNDAMENTAL RESONANCE,
275 cps. FREQUENCY RESPONSE RANGE
+ 3 db to 11,000 cps, with useable
efficient response to 15,000 cps. DIMEN-
SIONS; 5" diameter, 6” deep. THROAT
DIAMETER; 7:". MOUNTING HOLES; Two
5-18 tapped holes, 180° apart on 2"
circle, or four %{-18 tapped holes 90°
apart on 3" circle. WEIGHT; Net, 1113
Ibs., Shipping, 1514 lbs.
SPECIFICATIONS: MODEL 8-HD
180° dispersion accomplished by dif-
fraction principle. ACTUAL CUTOFF; 600
cps. RECOMMENDED CROSSOVER POINT;
800 cps. DRIVER MOUNTING; two 55-18
holes spaced 180° apart on 2" circle.
Accepts T-10 or T-25 drivers. DIMEN-
SIONS; 314” high, 1414” wide, 714”
deep. WEIGHT; Net 114 Ibs., Shipping,
2 163.
Mote: With only slight modifications
with a drill, the mounting flange will
accept most competitive makes of high-
frequency drivers.
SPECIFICATIONS: MODEL X.8
INSERTION LOSS; Less than 1 db. PHASE
ROTATION; 270°. POWER RATING; 60
watts. INPUT, HIGH OUTPUT, LOW OUT-
PUT; Choice of all either 16 ohms or 32
ohms. DIMENSIONS; 8" long, 515” wide,
415” high. WEIGHT; Net, 5 Ibs., Ship-
ping, 6 lbs.
C
(
Electro:Voice”
TRADITION
The original Aristocrat, engineered by Electro-Voice
almost three decades ago, offered a combination of
reasonable size and elegant appearance coupled with
high quality, wide-range performance. The new
Aristocrat III continues this tradition. An exquisitely
balanced three-way system, it successfully extends sound
reproduction, without coloration or distortion, to nearly
the upper and lower limits of audibility.
The Aristocrat [II's abilities in bass reproduction are
made possible by the 12W Series Il, 12-inch woofer
coupled to a folded corner hom bass enclosure beginning
at the rear of the woofer cone. At midrange frequencies,
direct radiation from the front of the woofer accounts
for acoustic output. This form of acoustic loading
.permits a higher, more economical crossover point by
allowing front radiation from the large driver, cone.
Thus, a high-frequency horn of small dimensions (the
E-V Model 8HD) can be housed within the structure
with ease. The built-in X& crossover network transfers
energy to the 8HD/1824M midrange above 800 Hz. At
3500 Hz an X36 crossover network supplies the very
highest audible frequencies to the T35A driver.
The surprisingly modest dimensions of the Aristocrat III
make it easy to accommodate into small rooms. The
elegantly styled Aristocrat cabinet is solidly constructed
from selected hardwoods and walnut veneers.
PLACEMENT
After connecting the Aristocrat output terminals to your
amplifier, the unit is ready for operation and can now be
ENGINEERING DATA
ARISTOCRAT Ill
LOUDSPEAKER SYSTEM
SPECIFICATIONS
35 to 15,000 Hz
6 ohms
#00. 3500 Hz
Frequency Response:
Nominal Impedance:
Crossover Frequencies:
Dimensions: 752 mm (29.6 in.) high
483 mm (19 in.) wide
414 mm (16.3 in) deep
Weight: 34.5 kg (76 1b)
placed in the corner of the room. If corner placement is
not possible, the Aristocrat may be placed near a wall
with some reduction in low-frequency efficiency. In this
case spacings from the wall should follow the guidelines
suggested below for corner placement.
Adjacent to hard wall surfaces, the unit can be placed as
far as 100 mm (4 in.) from the comer walls of the room.
The minimum spacing that can be used is 25 mm (1 in.)
with a nominal suggested value of 50 mm (2 in.). Adjust
this spacing for most pleasing musical balance in the
upper bass region. In the lowest octave of the system
this spacing is not critical because of the relatively large
wavelengths involved.
AMPLIFIERS
While the Aristocrat Ill can accommodate the full music
power output of amplifiers designed for home use, most
any modern, good quality high-fidelity unit may be used
with very satisfactory results.
The design and construction of the speaker and enclo-
sure components, which comprise the Aristocrat III
system, combine to provide an unusually efficient
operating device. Because of this high efficiency, far
less amplifier power is needed to achieve maximum
performance than with many smaller or equivalently
priced systems,
The Aristocrat III owner who is selecting an amplifier
should devote careful attention to choosing one
with quality components, employing state-of-the-art
technology.
CONNECTIONS
Connection of your Aristocrat III to the amplifier
should be made with No. 18 or larger wire (common
zip or lamp cord is good). For proper phasing, be sure to
run the lead from + on the Aristocrat III to the output
terminal on the amplifier, and from — to the Common
terminal.
When using Aristocrat [II's in stereo pairs it is important
the speakers be in phase. To check phasing in this type
of system, feed monophonic source materials into both
channels simultaneously and adjust the amplifier’s
balance control so that the Aristocrat III's are playing
at equal loudness. Then stand at the point of conver-
gence of the axis of the two speakers (midway between
them and at a reasonable distance from them). If the
stereo channels are properly phased and balanced, the
sound will seem to come from an imaginary speaker
midway between them. If this effect cannot be obtained
at any setting of the stereo balance control, the con-
nection to one of the two Aristocrat III's should be
reversed. This is accomplished by reversing the con-
nection at either the amplifier or speaker system or by
use of the phase switch on your amplifier if one is
provided. When the system has thus been adjusted so
that monophonic sound seems to come from the
imaginary center source, well recorded stereo discs and
tapes will be reproduced with startlingly precise stereo
localization, and the overall sound quality will be
magnificent at almost all listening locations in the
room.
LEVEL CONTROLS
The loudness of the midrange and very-high-frequency
sections of the Aristocrat III may be individually
adjusted by means of the level controls provided. A
simple way to adjust the very-high-frequency (Brilliance)
control is to tune in a live FM broadcast and, with
volume level equal to that of your own voice, adjust the
control until the “S” and “T” sounds are no more
prominent in the announcer’s voice than they are in
your own. This adjustment will usually prove satisfac-
tory. Setting the high-frequency control too high will
produce a “metallic” sound. Your best guide to setting
the control properly is, of course, a familiarity with the
sound of live music. Acoustically “hard™ or “live” rooms
will normally require a somewhat retarded setting of the
Brilliance control to compensate for the greater amount
of high-frequency reflections. In “soft” or “dead”
rooms, with carpeting, draperies, and soft furniture, a
more advanced setting of the high-frequency control will
normally be required.
The midrange control adjustment is somewhat less
critical. Should a more perfect match to the room be
necessary, simply slowly rotate the controls individually
to suit your hearing.
CUSTOMER SERVICE
The Aristocrat Ш 15 packed to provide protection well in
excess of shipping requirements. If shipping damage does
occur, contact the dealer from whom the unit was
purchased.
FIVE YEAR WARRANTY — Limited
Electro-Voice high fidelity speaker systems are guaran-
teed for five years from date of original purchase against
malfunction due to defects in workmanship and materi-
als. If such malfunction occurs, speaker will be re-
paired or replaced (at our option) without charge for
materials or labor if delivered prepaid to the proper
Electro-Voice service facility. Unit will be returned
prepaid. Warranty does not cover finish or appearance
items or malfunction due to abuse or operation at other
than specified conditions. Repair by other than Electro-
Voice or its authorized service agencies will void this
guarantee.
Specifications subject to change without notice.
Part Number 530099—130
a Guiton coma ELECTRO-VOICE, Inc. 600 CECIL ST, BUCHANAN, MICH. 49107
MANUFACTURING PLANTS AT B BUCHANAN, MICH, B NEWPORT, TENN. B SEVIERVILLE, TENN. B GANANOQUE, ONT. EB LITHO IN USA.
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