ADC--The First Low-Mass, Low Resonance Turntable
ADC is in the business of building breakthroughs.
First, we brought you the innovation of the low mass cartridge. Then the remarkable computerized Accutrac turntables. Next, the State-of-the-Art Low Mass tonearms.
And now, our engineers have combined the latest advancements of tonearm technology and turntable construction to reduce mass and resonance to new lows.
Result: new benchmarks of high performance.
Finally, the integration of a carbon fibre design tonearm. The famous LMF Carbon Fibre tonearm was the model for the tonearm found on the ADC 1700DD.
In fact, until now you had to make a separate investment in an ADC tonearm to achieve this level of performance.
A level of performance never before available on an integrated turntable.
The mass is lowered by the development of a tapered profile.
It is statically balanced with a lead filled decoupled counter weight, and the headshell is molded carbon fibre, long known for its low mass to high tensile strength ratio.
Furthermore, the headshell is connected to the arm with gold plated computer terminal pins.
And the main bearing cradle is made of sintered aluminum. The pivot system utilizes micron polished instrument bearings which are hand picked and matched perfectly to both the inner and outer races, for virtually friction less movement.
The viscous cueing is a gentle 4mm/sec., and the tempered spring anti-skate adjustment is infinitely variable to 3.5 grams.
The design, the materials and the details interact to provide incomparable performance for a tonearm on an integrated turn table system.
In fact, the tonearm alone is worth the price of an ADC 1700DD.
Finally, resonance conquered.
The technical know-how that conquered the problems of the tonearm mass, also conquered the problems of turntable resonance.
The ADC 1700DD reduces resonance to levels so negligible they are virtually nonexistent.
The achievement lies in the innovative construction formula for the turntable base that incorporates the latest advancements from European engineers.
The base is constructed with two dissimilar materials that are resonance-cancelling. First, the outer frame of the base is molded, and then a composition of foamed concrete is injected to absorb and neutralize resonance and feedback.
Beyond even this foamed concrete anti-resonance breakthrough, the base is isolated by energy absorbing, resonance-tuned, rubber suspension feet.
This is as close as technology has ever come to defying the physical laws of resonance.
The motor in the ADC 1700DD is also present standard of excellence: Direct Drive Quartz Phase-Locked Loop. The quartz is used in the reference oscillator of the motor.
An electronic phase comparator constantly monitors any variance in the speed, making instantaneous corrections. Even when out of the Quartz-Locked mode, the optical scanning system keeps drift at below 0.2%.
In fact, to check the speed at a glance, we've engineered the 1700DD with a pulsed LED strobe display for your convenience.
Low-mass. Low-resonance.
High performance.
What is the result of all these breakthroughs? Pure pleasure.
The pleasure of enjoying your favorite music with less distortion and coloration than you may have ever experienced before.
Now you can truly appreciate the integrity of the original recording.
Our engineers have reduced record wear and music distortion to a point where rumble is -70dB Din B, and Wow and flutter less than 0.03% WRMS.
In the history of audio technology, significant breakthroughs have been made over the past four years with the development of Quartz Lock Direct Drive, carbon fibre tonearms, foamed concrete anti-resonance construction.
And now, ADC is the first to bring them all together in the 1700DD.
We invite you to a demonstration of this and the other remark able ADC turntables at your nearest franchised ADC dealer.
Or, if you'd like, write for further information to: ADC Professional Products, a division of BSR Consumer Products Group, Route 303, Blauvelt, N.Y. 10913.
Low-mass. Low-resonance. We think you'll be highly interested.
Accutrac is a registered trademark of Accutrac Ltd.
(Adapted from: Audio magazine, Nov. 1978 )
Also see:
ADC Model 1700DD Semi-Automatic, Quartz-Lock Turntable (Dec. 1979)
ADC 1700DD turntable (Sept. 1979)
ADC cartridges (Oct. 1977), ADC tonearms (Sept. 1978)
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