Since the introduction of stereo discs, achieving the total signal of a stereo record and maximum channel separation has been a problem with conventional tracking tone arms. Marantz has solved that problem with the new SLT-12 Straight Line Tracking Turntable.
When the master disc is cut in the recording studio, the cutting head travels across the disc in a straight line. The grooves are cut proportionately to the volume of the sound; as the sound ebbs, the grooves narrow - as the sound swells, they broaden. Each side of the groove carries a separate track - one for each stereo channel. These grooves carry the total sound originally recorded.
The Marantz SLT-12 tone-arm tracks acrossthe disc in a straight line following the path originally created by the cutting head. Thus the stylus always tangent to the grooves, receives the full signal incised on each side of the groove. It is the only system available which faithfully reproduces the sound that was priginally recorded.
The critical elements of the Marantz SLT-12 Turntable provide maximum precision and atability in support of the tone-arm assembly. The free-floating stylus is always fully positioned in the groove by counter-balancing the tone-arm assembly. A 12 lb. cast and dynamically balanced turntable rests upon a massive, precision-ground tungsten carbide thrust bearing to produce low friction, dimensional stability. Power is derived from ahysteresis-synchronous motor. The precision-ground uscothane drive belt is noted for its uniquely stable elasticity. Push-button controls have been installed for convenience, while the cueing device eliminates the necessity of ever touching the tone-arm.
The SLT-12 system includes stereo cartridge with elliptical diamond stylus and walnut base.
Zero Tracking Error
Revolutionary straight line tracking arm holds stylus tangent to record groove at all times, eliminates inner groove tracking error distortion, skating force, and uneven stylus wear - al inherent in conventional arm design.
12lb. heavyweight precision machined turntable, tungsten carbude thrust bearings and precision ground drive belt combine to provide maximum isolation from acoustical feedback with lowest possible rumble.
Widest Dynamic Range
marantz designed ultra-high compliance pick up and lightweight low mass arm produce finest tone quality and an unprecedented dynamic range.
No need to ever touch pick up arm. Positive cueing control automatically places arm in desired groove-track, eliminating accidental scratching and damaging of prized recordings.
The only turntable system designed to precede the state of the art. Advances in cartridge development yet-to-come will obsolete most existing tone-arms. only the Marantz SLT-12 has the capacity to accommodate all future developments.
Platter: 12,76 lbs (non-magnetic)
Speeds: 33⅓ and 45 RPM
Wow & Flutter: Better than 0,04%
Noise Floor: -112 dB (1,4 cm/s; 100 cps)
Tracking Force Preste: 1g
Tracking Error: Non-existent. (0 degrees/inch)
Skating Force: Non-existent
Frequency Response: 20 to 20,00 cps
Compliance: 30 x 10⁻⁴ cm /dyne
Stylus: Diamond Elliptical (.0002 x .0009 radius)
Output: 6 mv; recommended load 47,000 ohms
Drive Principle: Precision Uscothane belt
Rumble: Virtually non-existent
Motor: Hysteresis Synchronous
Leveling: Precision bubble-level adjustment
Dimensions (including Walnut base): (Wide x High x Deep) 18¼ x 14 x 6½ inches
Weight: 27 lbs
Power Requirements: 117 V, 60 cycles (50 cycles available)