JVC JT-V31 tuner

JVC JT-V31 High Fidelity FM/AM Tuner

What do you want from a tuner? Easy station selection and high fidelity sound are the two most important things, naturally. But how can you be sure that the tuner you're about to buy will deliver them? Here's what our JVC audio engineers have to say about the new JT-V31.

"Providing the two most basic function of a tuner, if it is to be strictly hi-fi, is a challenge most research labs and theoretical thinkers think is easy to meet. But in practice you find that an ingenious circuit designed to solve one problem - say that of increasing FM selectivity - might lower the sensitivity, or degrade other specifications, once you get it wired into your prototype model. So the so-called perfect circuit is not so ingenious after all. In truth, we've made the best compromises we could in the JT-V31. It's really state-of-the-art and we think it's a lot of tuner for the money."

The longer you own it, the more you'll appreciate it. It's the JT-V31 from JVC - Listening for the future.

FM 65 dB Selectivity

Selecting the station you want in FM-crowded urban areas is a growing problem in tuners not built for the job. The JT-V31 however has a new 4-resonator type single-unit ceramic filter to help achieve an impressive 65 dB selectivity without degrading other important specifications.

Precision Built FM Frontend

A dependable frequency linear tuning capacitor in the FM frontend increases sensitivity to distant or weak stations and affords high tuning precision.

FM Stereo PLL Circuit

The newly developed PLL (Phase-Locked Loop) circuit in an IC form delivers outstanding stereo separation over an IC form delivers outstanding stereo separation over a wide frequency range with more reliability and stability than conventional multiplex (MPX) circuits. Independent left/right-channel low-pass filters eliminate crosstalk for more precise sound image location.

IC Construction

Three high-integration IC formed blocks, one each for the FM-IF FM-MPX, and AM, guaranties dependability and reduce service needs.

FM/AM Tuning Ease

The extra long (240 mm ) dial is frequency linear for FM and is designed scientifically for easiest reading in actual use. The mechanism has a high-inertia flywheel and stretch-free "radial cord" cables to maintain high precision operation in all types of environment.

Twin Tuning Meters

The signal strength meter (FM an AM) at the left side of the meter window always responds in linear proportion to the strengths of incoming signals without overloading. Its circuit is the integral-linear type and is never :fooled" (saturated). The FM tuning meter at the right is equally well built, providing visual confirmation of the tuning of an FM signal to the point where distortion is minimal and stereo separation best.

Additional Features

Hi-Blend Switch - Enables elimination of high-frequency FM noise for optimum stereo separation

Low Distortion AM  - IC with self-contained RF amp. low-pass filter and ceramic filter assures clear, pleasant AM sound.

FM Muting - Switch ON (in normal position) to eliminate FM inter-station noise, or OFF to tune in weak or distant stations.

Specifications

FM Tuner Section

Tuning Range:  88 MHz – 108 MHz

Usable Sensitivity (IHF):  1,9 µV

50 dB Quieting Sensitivity

Mono :  4,0 µV

Stereo :  40 µV

Distortion at 100 Hz

Mono : 0,2%

Stereo :  0,5%

Distortion at 1 kHz

Mono : 0,2%

Stereo :  0,35%

Distortion at 6 kHz

Mono : 0,2%

Stereo :  0,4%

Signal-to-Noise-Ratio:

Mono  :  72 dB

Stereo  :  50 dB

Selectivity:  60 dB

Capture Ratio:  1,2 dB

Alternate Channel Selectivity:  60 dB

Spurious Response Ratio:  80 dB

Image Response Ratio:  60 dB

IF Response Ratio:  90 dB

AM Suppression Ratio:  50 dB

Stereo Separation:  40 dB (at 100 Hz); 45 dB  (at 1 kHz); 35 dB  (at 10 kHz)

Frequency Response:  30 Hz  – 15 kHz +0,5 dB , -2,5 dB

Subcarrier Product Ratio:  50 dB

Output Level:  750 mV  (400 Hz, 100% Mod.)

AM Tuner Section

Tuning Range:  525 kHz – 1605 kHz

Usable Sensitivity:  300 µV/m (Bar antenna); 50 µV  (External antenna)

Signal-to-Noise-Ratio:  50 dB

Distortion :  0,5%

Selectivity :  30 dB

Image Response Ratio:  45 dB

IF Response ratio:  45 dB

Output Level:  750 mV  (400 Hz, 100% Mod.)

General

Power Sources

AC 120 V, 60 Hz (USA, Canada)

AC 220 V, 50 Hz (European Countries)

AC 110/120/220/240 V, 50/60 Hz (Other Countries)

Dimensions (W x H x D):  390 x 152 x 358 mm (15-11/32” x 6” x 14-3/32”)

Weight:  5 kg (11 lbs)

 

JVC VN-900 amplifier

JVC VN-900 amplifier

Features:

220 Watts power output

Power Bandwidth 20 Hz to 20,000 Hz

Phono input load switch

S.E.A. control system

S.E.A. record switch for tape recording

Dual facilities for tape monitoring and tape dubbing

All-stage direct-coupled OCL circuitry

Automatic transistor protector circuitry

Terminals for 4-channel connection

Pink noise generator built-in

Sound Effect Amplifier (S.E.A,)

The Sound Effect AMplifier is a feature unique to JVC which gives you more control over tone than has ever before been possible. it was never found outside professional recording studios before JVC incorporated it in their amplifiers and receivers. The advantages of the S.E.A. system are:

It gives the listener complete control of the tone throughout the entire frequency range.

By adjusting the controls entirely new sounds can be created

Tone can be adjusted to compensate for variations in the transmission system; recording method , type of music, characteristics of your stereo system and the acoustic properties of your room.

Unlike other tone control systems which have only a bass and treble control, the S.E.A. has seven controls. Each of these controls makes it possible to vary the response in a different frequency range. S.E.A. gives a steeper gradient at both the high and low frequency end of the response curve than the conventional system which is limited to 6 dB/oct. The outstanding feature is S.E.A.'s handling of the midrange frequencies. the conventional tone control system controls only the high and low ranges whereas S.E.A. extends this control to cover the whole frequency range.

Specifications

Type:  Solid State Stereo Integrated Amplifier

Semiconductors:  39 Transistors; 14 Diodes;

Inputs: Phono 1 & 2;Aux 1, 2 & 3; Tape-Play 1 & 2; Main IN; 4-Channel Rear In

Outputs: Tape Rec 1 & 2; 2 x Pre-Out; 4-channel Rear Out; Speakers System 1 & 2; Headphones

DIN Socket:  Tape 1, Tape 2

Rear Panel Controls: Phono 1 Cartridge Load select & Level adjust

Power Amplifier Section

IHF Dynamic Power:  

170 W (85 + 85 W) at 8 Ω  load

220 W (110 + 110 W) at 4 Ω  load

Continuous Power RMS

120 W (60 W + 60 W) at 8 Ω  load one channel driven

160 W (80 W + 80 W) at 4 Ω  load one channel driven

100 W (50 W + 50 W) at 8 Ω  load both channel driven

120 W (60 W + 60 W) at 4 Ω  load both channel driven

Power Bandwidth

10 Hz - 23 kHz (8 Ω  load one channel driven, output power 50 W THD 0,25%)

20 Hz - 20 kHz (8 Ω  load both channel driven, output power 50 W THD 0,25%)

Total Harmonic Distortion:  0,05% at rated power (1 kHz)

Intermodulation Distortion: 0,4% at rated power

Frequency Response:  3 Hz - 450 kHz (-3 dB) at 1 W

Damping Factor:  50 Hz at 8 ohm load

Matching Load Impedance:  4 - 16 Ω 

Input Sensitivity for Rated Power:  1 V

Preamplifier Section

Frequency Response:  20 Hz - 50 kHz ±0,5 dB

S.E.A. Controls

Center Frequency :  40; 150; 400; 1,000; 2,400; 6,000; 15,000 Hz

Control Range:  ±12 dB

Input Sensitivity For Rated Power:  

Phono :  2,5 mV

Aux :  200 mV

Tape Playback :  200 mV

Signal-to-Noise-Ratio: 

Phono :  56 dB

Aux :  86 dB

Equalizer:  RIAA (Mag) ±0,5 dB

Phono Overload:  700 mV (p-p) at 1 kHz; 250 mV RMS

Recording Out Level

PIN Jack :  180 mV

DIN Jack :  20 mV

Filters

Subsonic :  18 Hz 12 dB/oct

High :  9 kHz -12 dB/oct

Muting:  -20 dB

Loudness:  at -30 dB point; 1 kHz (+15 dB); 10 kHz (+4 dB);50 Hz (+11 dB)

Pink Noise Generator:  0° , 180° 

Power requirement:  110, 120, 220, 240 V 50/60 Hz

Power Consumption:  230 W

Dimensions (W x H x D):  16-5/8" x 5-3/8" x 12-1/2"

Weight:  28 lbs

 

Tannoy Westminster loudspeakers

Tannoy Westminster

The Tannoy Westminster presents the latest in Dual Concentric technology combined with traditional standards of construction and finish, and is a worthy successor to the renowed tannoy Autograph.

A 15" Dual Concentric drive unit is coupled to a straight axis horn at the front and to a long folded horn at the rear. The advantages of the system are as follows; Low frequencies, i.e. below 300 Hz are reproduced by a much larger radiating wavefront loudspeakers. the quality of low frequencies as perceived by a listener are more realistic since low frequency sound radiations in musical instruments, etc., are also generated by large radiating wavefronts. For example, timpani, contrabass, organ pipes (32 ft. 16 ft.) producing low frequencies naturally, all have a basic wavefront generating area much larger than even a 15-inch (380 mm) direct radiating loudspeaker system. The radiating area of the rear folded horn in the Westminster loudspeaker is over 2,5 times that of a 15 inch loudspeaker and therefore much more comparable to the original instruments. The quality of low frequency reproduction is therefore improved. The efficiency of the system, used in the Westminster is approximately 8 dB greater than conventional direct radiating systems using a 15-inch drive unit. A fundamental consequence of the increase in efficiency is a lower distortion content when operated at normal domestic sound levels. A further consequence of high efficiency is of course that the power amplifier is under much less stress when reproducing high peak transient sound levels typical of wide dynamic range digital recordings. The air load matching between drive unit and listening environment is improved by the use of compound horn techniques, therefore the drive unit is much less highly stressed in reproducing peak transient levels. The thermal dissipation in the voice coil is reduced resulting in a more linear conversion of quiet and loud passages, i.e., the true dynamic range of the programme material is retained.

Using conventional separate bass and treble units with a rear folded horn would result in an extremely large and cumbersome cabinet. The tannoy Dual Concentric drive unit has separate high and low frequency drivers within a common chassis. Integration of the drive unit and horn loading systems with the cabinet is therefore more effective and the physical size of the cabinet reduced.

In the Dual Concentric drive unit a single chassis carries both a direct radiating low frequency driver and, mounted behind and on the same axis, an HF compression driver.

When used in the Westminster with a time compensated crossover network, a single point sound source is provided for frequencies from which the listener can re-create stereo images. The result is a much clearer, more accurate stereophonic effect. Lowe frequencies which do not affect stereo imagery are reproduced through the rear folded horn.

The resulting sound quality available from the Westminster produces a sense of reality and presence which is simply not provided by any more conventional loudspeaker system.

The finishing touch to this fine loudspeaker is provided by the superbly finished cabinet, combining solid walnut mouldings and real walnut veneers with discrete oatmeal grille cloth. The centre grille is removable with a key for access to the HF response controls.

1. The compound horn construction shown in diagrammatical form with the rear horn straightened out for clarity.

2. Perspective view of Westminster cabinet showing the internal construction of the rear horn. Arrows show the direction of radiation from the drive units.

Specifications

Power Rating:  120 W RMS, 300 W Peak

Amp. Rating:  50 to 200 W RMS per channel (8 Ω)

Sensitivity:  96 dB (for 1 W at 1 m)

Maximum SPL:

117 dB at 1 m for 120 W

123 dB at 1 m for 500 W peak

Impedance:  8 Ω  (Nominal) 5,5 Ω  (Minimum)

Frequency vs SPL:  18 Hz - 20 kHz

Phase Response:  80 Hz - 10 kHz ±12° 

Time Compensation:  less than  ±10 µsec (80 Hz - 10 kHz)

Dispersion:  60°  incl. ang. Horizontal - Vertical at -6 dB at 10 kHz

Crossover Frequencies:  1 kHz electrical, 300 Hz acoustical

Crossover Control:  

±6 dB over 1 kHz to 20 kHz shelving

+3 dB to -6 dB per octave over 5 kHz to 20 kHz slope

Crossover Type:  Passive, Low loss, Time comp. type 1027

Driver Type:  Dual Concentric, High Compliance type 3839/W

Distortion

Less than 2% third harm, at half-power, 80 Hz - 20 kHz 

for 90 dB SPL less than  0,3% third harm, 50 Hz - 20 kHz 

for 110 dB SPL less than  1m4% third harm. 80 Hz - 20 kHz 

for 113 dB SPL less than  3,0% third harm. 80 Hz - 20 kHz 

Low Frequency Direct Radiator

Nominal Diameter:  380 mm (15")

Voice Coil Diameter:  52 mm (2")

Free Air Resonance:  22 Hz 

Total Q:  0,18

High Frequency Direct Radiator

Diaphragm Diameter:  51 mm (2")

Voice Coil Diameter:  51 mm (2")

Horn Lower Cut off Frequency:  250 Hz 

Enclosure Type:  Compound Horn

Rear Folded Horn:

Total Length = 3 m (10 feet)

Throat Area = 0,03m2 (49 sq in)

Mouth Area = 0,4m2 (620 sq in)

Flare Constant = 0,85 (exponential)

Front Horn

Total Length = 0,15 m (6 in)

Throat Area = 0,075m2 (116 sq in)

Mouth Area = 0,31m2 (480 sq in)

Flare Constant = 9,7

Enclosure Volume:  521 litres

Enclosure Dimensions (H x W x D):  1300 x 1030 x 631 mm

Enclosure Weight:  115 kg complete

packed Dimensions (H x W X D):  1500 x 1100 x 7200 mm

Packed Weight:  140 kg

Enclosure material:  Solid walnut with 25 mm particle board

Grille Material:  Specially woven cloth over wood frame with lock and key fixing

 

Infinity Quantum 5 loudspeakers

 Infinity Quantum 5

Hard to believe until you hear it  - and even then; that a moderately-sized speaker at a most reasonable price can house the most advanced high-and low-frequency drivers (plus a high-definition midrange dome) and set them free to operate in all their realism.

That's the beauty of the Quantum 5 by Infinity.

Our superlative EMIT and the revolutionary Infinity -Watkins Dual-Drive Woofer are vital ingredients of our formidable Quantum reference Standard speaker-and-equalization system priced at several thousand dollars.

Now the Quantum 5 - at a small fraction of the cost of the Quantum Reference Standard  - has an EMIT and a dual-voice coil woofer of its own. And a sound that would be a revelation from any size speaker, at any price.

IN a woofer, two voice-coils are better than one. In performance, our dual-voice-coil woofer is better than any other.

Impossible combination: good transient response, sufficient power, acceptable efficiency, and extended bass range - all from an enclosure of reasonable size.

Now Infinity brings you Wiliams Watkin's ingenious solution to problems of a speaker's fundamental resonance, back-EMF, and the resultant impedance peak.

The Infinity-Watkins Dual-Drive Woofer, available only in Infinity's Quantum Series speakers, works like this.

In the frequency range where rising impedance and falling response were considered inevitable, a second voice coil takes over. In the region of resonance, it presents a low impedance path to the amplifier.

Now back-EMF is reduced, so the speaker can make use of the amplifier's power at low frequencies. Now it isn't inherent resonance but input that controls the cone. Now extended bass response co-exists beautifully with accurate transient performance. Now the superb bass reproduction of the dual-voice-coil woofer is yours in a reasonably priced compact speaker, Infinity's marvelous Quantum 5.

Is this any way to treat a revolutionary woofer?

In our top-of-the-industry Quantum Reference Standard, the Watkins is the Oscar Peterson of woofers; it can loaf, and still out-perform the rest of the world. It is responsible for response only from its phenomenal floor of 18 Hz to an easy 100 Hz/

As used in the three-way Quantum 5, the revolutionary woofer handles a frequency range from 30 through 600 Hz. So we give the cone a special treatment to increase greatly its stiffness-to-mass ratio. This damping treatment eliminates a variety of circumferential modes and resonances that blur the bass and muddy the midbass in ordinary speakers. Low-frequency reproduction from the Quantum 5 is exciting in its combination of clarity with power. In the vital midrange, Quantum 5 uses Infinity's high-definition dome driver. It is exceptionally accurate in its range from 600 to 4000 Hz. And from 4000 Hz up - far up.

The superlative, soaring EMIT - clearly superior to domes and cones. And electrostatics.

In theory, the magnetic counter-part of the electrostatic tweeter would be just as clean, accurate, and high-ranging as the electrostatic - and trouble-free besides.

In fact, our exclusive EMIT with its magnets of the rare-earth substance Samarium Cobalt, the most powerful magnetic material on earth, is all of that and more.

The EMIT exhibits nearly perfect horizontal dispersion - clearly superior to electrostatics' narrow beaming of high frequencies. And EMIT, more than either electrostatics or conventional dome drivers, is capable of reproducing every transient peak, every fortissimo as accurately as every subtely in the most demanding recording. Listen.

IN scientific measurements and, more important, in listening tests, EMIT stays smooth as high as your ears can follow. beyond that, they keep going right up to 32,000 Hz. Infinity invented the Electromagnetic Induction Tweeter. And only Infinity offers you its advantages. It's standout technological advance and it blends beautifully with the midrange dome and Watkins woofer - thanks to Infinity's meticulous attention to crossover technology and phasing.

The resulting output of a Pair of Quantum 5 speakers has an almost pictorial depth. You place each musician or section front or rear, as well as left or right, as naturally as at a concert.

Specifications

Frequency Response:  38 through 32,000 Hz ±3 db

Horizontal Dispersion:  -2 dB 60°  left and Right (20 kHz)

Suggested for use with amp. or receivers of:  30 Watts to 250 watts per channel RMS

Nominal Impedance:  4 Ω 

Drivers

LF :  300 mm (12") Infinity-Watkins Dual-Drive Woofer

MR:  38 mm (1-1/2") high-definition dome midrange

HF:  EMIT tweeter

Crossover Frequencies:  600 Hz and 4,000 Hz

Level Controls: Midrange and Tweeters

Dimensions (H x W x D):  670 x 380 x 300 mm (26-1/2" x 15" x 12")

Weight (packed):  25 kg (55 lbs)

Finish:  Oiled walnut veneer or particle board;

Grille:  Black cloth removable grille.

Infinity Quantum 4 loudspeakers

Infinity Quantum 4

The sound of this smallest floorstanding speaker in the Quantum Series is eloquent. It clearly proclaims that with Infinity, a music-lover who has to compromise on the cost of elements of an audio system doesn't have to suffer equal compromises on quality.

In 1976 our Quantum Line Source (height, well over five feet price well over $1000) set a whole new industry standard with the first use of superlative EMIT tweeters and the Infinity-Watkins Dual-Drive Woofer, among other advances.

 Now The Quantum 4 (much smaller size, much lower price) seems certain to set the new standard for compact three-way speakers, with an EMIT and dual-voice-coil woofer ot its own. Among other advances.

What two voice coils do for our remarkable woofer.

It has always been impossible to get good transient response, sufficient power, an acceptable level of efficiency and extended bass range from an enclosure of reasonable size. Till now.

Now William Watkins has found, and Infinity has made excellent use of, the solution to problems of a speaker's fundamental resonance, back-EMF, and the resultant impedance peak. Watkins's invention, available in Infinity speakers and no others, is a woofer with two voice-coils, called the Infinity-Watkins Dual-Drive Woofer. It works like this:

Down among the frequencies where rising impedance and falling response were inevitable before, the second voice-coil takes over. In the region of resonance, it presents a low impedance path to the amplifier.

Now the speaker can make use of the amplifier's power at low frequencies, because back EMF is reduced. Now input rather than inherent resonance can control the cone. Now extended bass response and accurate transient performance can co-exist beautifully. Now you can enjoy the superb reproduction of the Dual-Drive Woofer in a compact speaker, the Quantum 4.

Is this any way to treat a revolutionary woofer?

In our top-of-the-industry Quantum Line Source, the Infinity-Watkins is the Oscar Peterson of woofers; it can loaf, and still out-perform the rest of the world. We've made it responsible for response only from its phenomenal floor of 18 Hz to an easy 200 Hz.

As used in the Quantum 4, the revolutionary woofer handles a frequency range from 30 through 600 Hz. We give the cone a special treatment that greatly increases the ratio of its stiffness to its mass. This damping treatment eliminates a variety of distortions, circumferential modes and resonances that otherwise could blur the bass and muddy the midbass. And low frequencies from the Quantum 4 are exciting in their combination of clarity with power.

Next up in the Quantum 4 array of drivers is Infinity's high-definition dome midrange driver. In its range from 600 to 4,000 Hz it speakers nothing but the accurate truth. And above all.

EMIT - the eminent exclusive tweeter that stays smooth as high as your ears can reach - and beyond.

Infinity wrote the book on the electrostatic tweeter. It was a story of triumph over adversity. Now we/ve gone the electrostatic on better.

Electrostatics, with their low-mass diaphragms driven uniformly overall, delivered sweet undistorted reproduction of high frequencies. But they were subject to voltage break-down and tended to "beam" sound narrowly.

Our dream of creating a trouble-free magnetic counterpart of the electrostatic became a beautiful reality after we hit on the use of the magnetically powerful rare-earth material called Samarium Cobalt.

now our EMIT - with Samarium Cobalt magnet provides gloriously accurate and musical high-frequency performance minus the limitations of electrostatics, plus nearly perfect horizontal dispersion and high power capability, clear up to a superauditory 32,00 Hz.

EMIT tweeters are used in Infinity speakers. And in no other speakers in the world.

In the Quantum 4 the Dual-Drive Woofer, dome midrange driver, an EMIT, and Infinity's meticulous attention to phasing and crossover technology join together to produce startlingly lifelike stereo imaging and depth.

The sound of a pair of Quantum 4 speakers would be a joy no matter what size enclosures or what price instruments it came from, From compact speakers in the Quantum 4 price range it is a revelation .

specifications

Frequency Response:  35 through 32,000 Hz ± 3 dB 

Horizontal Dispersion:  -2 dB 60°  left and Right (20 kHz)

Minimum Rec. Amp. Power:  30 Watts per channel RMS

Maximum Rec. Amp. Power:  250 watts per channel RMS

Nominal Impedance:  4 Ω 

Drivers

LF :  12" Infinity-Watkins Dual-Drive Woofer

MR:  1-1/2" high-definition dome midrange

HF:  EMIT tweeter

Crossover Frequencies:  600 Hz and 4,000 Hz

Level Controls: Midrange and Tweeters

Dimensions (H x W x D):  910 x 380 x 300 mm (36" x 15" x 12")

Weight )packed):  41 kg (90 lbs)

Finish:  Oiled walnut veneer; removable grille.

 

Thorens BTD-12S tonearm

 Thorens BTD-12S Professional Tone Arm with exclusive cueing control for lowering and raising arm The Thorens BTD-12S tone arm is a classic example of Swiss craftsmanship. Designed for lowest possible inertia and friction, in both horizontal and vertical planes, the BTD-12S is ideal for pickup cartridges of the highest lateral and vertical compliance. The low inertia minimizes force on the stylus from warped and off-center records, assures positive contact between stylus and record groove, and reduces distortion as well as record and stylus wear to a minimum. Despite its very compact size,, the BTD-12S has less tracking error than many 16" arms (only 0,5(o) per inch). Special pivot design eliminates another source of distortion found in ordinary arms by keeping stylus perpendicular to the record at all times. The knob adjustment for stylus force (calibrated in grams) and the record-saving, stylus-saving are unequaled for convenience.

Outstanding Features

Cueing Device - A built-in precision cueing device raises and lowers the arm over the record when a knob is turned. When lifted, the arm is given a slight braking action to keep the stylus over the groove. When lowered, the arm is completely free of any interference from the cueing device.

Tracking Error - Only 0,5(o)/inch maximum with optimum stylus overhang

Bearings - Precision ball bearings on both axes reduce friction (lateral and vertical) to the order of 1/10 gram

Exclusive Pivot Design -  Ideally, the stylus axis a should remain in a vertical plane, defined by the stylus and the tangent to the record groove, for all up-and-down movements of the arm. In ordinary arms, this is impossible because the axis of the bearing for up-and-down motion is set at right angles to the straight part of the arm. This causes the ordinary arm to "cant" or lean the stylus to one side when in any position other than perfectly horizontal. The BTD-12S eliminates this source of distortion by setting the bearing at an angle to the straight part of the arm. The stylus in the BTD-12S thus never leans to either side for any height adjustment, any warped record.

Balancing -  With stylus force adjustment set to "0", the counterweight will balance the arm, with a 5-19 gram ( ,18 - ,67 oz.) cartridge installed, in both horizontal and vertical planes. Then, since stylus force is applied by a spring at any other setting of the adjustment, the arm remains in balance and is insensitive to out-of-level tables or floor vibrations

Stylus Force Adjustment - Calibrated in grams on a large, engraved scale for 2 to 8 grams with zero position for balancing.

Low-Frequency Resonance - Below audible range. Damping material isolates counterweight to prevent other undesirable resonance in audible range.

Plug-in Shell - AN aluminum plug-in shell accommodates any standard cartridge and comes with mounting hardware. A 4-pin (plus ground) connector provides electrical connections. A screw-secured slide on the shell permits easy, precise adjustment of stylus overhang.

Cables - Two shielded cables 39" (one meter) long, with standard phono connectors, and a separate ground wire are supplied. No soldering is necessary.

Specifications

Overhang Length:  12-5/8"

Height: 5-3/8" overall; 1-1/8" max. above playing surface

Distance Pivot to Table Center:  7-1/2"

Optimum Stylus Overhang: 11/16"

Range of Overhang Adjustment: 1/2"

Height Adjustment Range:  1-5/8"