Reprinted from Equipment Profiles This Month: Crown CX822 Stereo Tape Recorder AR Stereo Integrated Amplifier Garrard SL-95 Automatic Turntable Crown Model CX822 2-track Stereo Tape Recorder MANUFACTURER'S SPECIFICATIONSTape Speeds: Three, equalized; 15, 7Va, 33/4 ips. Timing: 99.8% or 1.8 sec. in 15 min. and adjustable to ±0.05% short term. Wow and Flutter: 15 ips, 0.06%; 7Va ips, 0.09%; 3% ips, 0.18%. (Guar. max. for record, playback.) Record/Play Frequency Response: 15 ips, ±2 dB 30 to 30 kHz; 7% ips, ±2 dB 30 to 20 kHz; 3% ips, ±2 dB 30 to 10 kHz. Signal-to-Noise Ratio: — 57 dB @ 15 ips; —56 dB @ 7Va ips, —50 dB @ 3% ips. Stop Time: One-half in. @ 33/4 ips; 1-in. @ 7V2 ips; 3 sec. from full rewind on 10V2-in. reel. Start Time: Under 0.1 sec. Wind and Rewind: 1200 ft. in 45 sec; 2400 ft on 10Va-in. reel in 58 sec. Reel Size: lOVa-in. (NAB) max.; 5-in. min. Distortion: Approaches thres hold of measurability. Inputs: 2 per chan nel; high-Z mic. or line level. Opt. input transformers for low-Z mic. Tone Con trols: Bass, 15 dB atten. or boost at 30 Hz; treble, 15 dB atten. or boost at 15 kHz. Outputs: Two per channel, 600-ohm unbal. One low-Z output (stereo phone jack) on front panel. Motors: Three. Drive, 1 Hysteresis synch, drive motor; Reel, 2 capacitor-run torque motors. VU Meters: Two 5-in. professional types with edge lighting. Bias Freq.: 100 kHz. Monitoring: Front-panel switch for ea. channel. Dimen sions: 17V2-in. high, 19-in. wide, 9-in. deep. Price (basic machine): $1790.00. The Crown CX822 pictured here is probably the finest tape recorder that has been reviewed in these pages. In addition to delivering phenomenal performance, it incorporates numerous features and refinements that place this machine in a class by itself. The Elkhart, Indiana manufacturer has, for example, introduced a com puter-type logic system to prevent de structive operations; electronics is substituted for mechanical mechanisms in many instances; tape handling has been made more gentle and faster than ever before, while tape tensions have been drastically reduced; editing has been greatly simplified; construction appears to be rugged enough to with stand parachute drops; and Old-World craftsmanship is apparent at a glance, quickly substantiated by handling the well-engineered recorder. The Crown Model CX822 recorder is the latest model in the 800 series of recorders from Crown International. It consists of two detachable parts: the tape transport and the electronics as sembly. Since the tape heads are part of the tape transport, all adjustments to the electronics affecting the com bined performance of the transport and electronics are performed when the two are mated. So for descriptive pur poses, let us consider the CX822 as one unit, breaking it down functionally, rather than physically. To begin with, the CX822 is a twotrack machine which works at three speeds. This means that the necessary speed changes (see Fig. 2) and selec table equalizations are built-in. (Crown's Model CX824 is a four-track unit, with high speed at 7J/£ ips and low at V/s ips.) The machine accepts stand ard, plastic, EIA reels directly (see Fig. 3) onto the turntable or 10V2-in. NAB reels with adaptors, which are furnished with the machine (Figs. 4 and 5). Each turntable is driven by a 1250 rpm capacitor-run torque motor with self-aligning bearings. Turntable braking is accomplished by electric means, whereby the motors are slowed by applying d.c. voltage to them. This contrasts with the solenoid-actuated mechanical braking system of most comparable machines. The type of dif ferential electro-dynamo braking used here is a patented feature of Crown transports, whose brakes did not grab, jerk or need adjusting during our ex tensive tests, and work extremely well in bringing the tape to a smooth, gentle, rapid stop. A positive temperature co efficient resistance is used to provide the braking differential. We tried to make the deck misbe have by stopping a roll of super-thin V^-mil tape at high speed by rock ing the tape back and forth, and by other tortuous combinations. Not only did we fail to foil the machine, but once motionless, the tape at the gate was limp (not under tension) and no stretch marks were to be found any where on the tape. All this despite its breakneck wind and rewind speed. It took exactly one minute to smoothly wind 1800 feet of 1-mil Mylar tape be tween 7-in. reels. The only apparent problem with this kind of braking would occur if there was a loss of elec trical power during rewind, say. But the mechanical simplicity, reduction of maintenance and potential reliability of the CX822 far outweigh such an un likely occurence as a power failure at the precise moment of rewind. The stainless steel capstan shaft is centerless ground, hardened and highly polished. Its tip is of non-magnetic, chrome-plated stainless steel, and it is concentrically aligned with a fourpound flywheel of nickel-plated steel. The assembly is mounted in a %-in. thick aluminum "tunnel" casting, five in. long, with self-aligning Oilite bronze bearings. The flywheel is driven by a centerless ground-neoprene drive belt Fig. 2-Drive pulley and capstan flywheel system shown in 7V2 ips position. The fly wheel, driven by a seamless neoprene belt, is mounted on rear of capstan. Note flywheel bearing support. Belt can be switched from 7V2 to 3% ips from frontpanel push rod. The 15 ips speed change is done manually by stretching the band over the largest pulley. The belt can be replaced in seconds, without removal of other parts.