![]() ![]() Initial balancing was very easy because of the threaded adjustment knob on the counterweight and the obviously very low friction of the arm bearings. With the aid of an overhang gauge that Dual supplies (it must be cut out of the last page of the turntable’s instruction manual), the process was no more difficult than usual. We installed a high-quality magnetic cartridge, designed to track at 1 gram, in the headshell of the CS 5000. The Dual CS 5000 measures 17-3/8 inches wide, 15 inches deep, and 5-1/8 inches high. On the right side are the three speed-selector buttons, with lights that indicate the operating speed. The power switch, a flat button, is at the left front of the motor-board. The CS 5000 has a walnut-veneer base and a hinged, clear-plastic dust cover. The manual gives instructions for adjusting the shock absorbers to meet specific operating conditions. The spring in each shock absorber can be compressed by turning a knurled ring to vary the degree of damping and the softness (or stiffness) of the suspension. ![]() The turntable system of the CS 5000, consisting of the platter, the tonearm, and their common supporting structure, is suspended from the wood base on four adjustable, shock-absorbing feet. Inside the outer rim of the cast aluminum-alloy platter is a heavy metal ring covered by a plastic hose that acoustically couples it to the platter and damps the bell resonances. The platter of the CS 5000 features a unique damping system to eliminate such resonance. These platters resemble a shallow bell, and they usually ring like one when struck or otherwise excited mechanically, a characteristic that can color or muddy the reproduced sound. Most turntables, including the CS 5000, have platters that are designed to concentrate their mass around the outer edge, where it contributes the most to the inertia of the system. The tracking-force and antiskating controls are on the tonearm’s pivot structure, near the arm rest and cueing-lift lever. A critical listener can do this by ear, and Dual also recommends VTA settings for a number of popular cartridges. The cartridge can be tilted by a knob on top of the shell, varying the VTA over a ± 5-degree range. The slim, tubular-aluminum tonearm has a removeable head-shell featuring Dual’s adjustable vertical tracking angle (VTA). The Dual CS 5000’s tonearm has its vertical pivot in the plane of the record, which reduces warp wow to its lowest possible level. The combination causes a periodic fore-to-aft shift of the stylus as the arm travels over the warp and superimposes a frequency modulation (wow) on the program. Dual points out that the arm-support system eliminates any need for critical leveling of the turntable, which can in theory be operated at almost any angle to the horizontal.Īnother potential problem, warp wow, is a common result of playing a warped record with a tonearm whose vertical pivot is located above the record’s plane. It is supported by gimbal pivots for both axes of motion and operates at all times in a fully balanced state (the downward tracking force is supplied by a coiled spring). The tonearm of the CS 5000 is designed to minimize many of the recognized weaknesses of typical pivoted tonearms. Unlike almost all other currently available record players, the Dual CS 5000 operates at 78 rpm as well as 33% and 45 rpm. In addition, a second control loop measures the platter’s speed with an optical sensor and corrects the motor speed as required to maintain the correct playing speed. The motor’s speed is electronically controlled by a quartz-crystal reference oscillator and a microprocessor. The platter, which weighs 3-3/4 pounds including its thick rubber mat, is belt-driven from a tiny, flat, disc-shaped motor. At the end of a record’s side (which is sensed optically), the arm lifts and returns to its rest and the motor shuts off. The three-speed Dual CS 5000 is a semi-automatic turntable that starts rotating when the arm is moved from its rest and stops when the arm is returned. ![]()
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