Lot Description: Vintage, Hi-Fi, Onkyo Quartz Locked Stereo Receiver, Model TX- 4500. Powers On. The below information was taken from online, so please verify for yourself:

The Onkyo Quartz-Locked Receiver, compare it against every known receiver. You'll see there's no comparison. Quartz-Locked technology is a dramatic breakthrough in automatic drift-free and virtually distortion-free FM reception. There are no buttons to push, no switches to throw, nothing extra to do to lock in a signal. Once a station is tuned in, it's locked in. Quartz-Locked in. And any factor which can cause tuner drift is automatically compensated for, so the TX-4500 assures constant pinpoint FM reception, maximum channel separation and minimum distortion. But that's only the FM story. There's virtually nothing you can't accomplish with the TX-4500.

Flawless programs come off records and tapes. Or use the TX-4500 to make your own tapes. Or mix your own programs with multiple tape inputs and dubbing. The TX-4500 does it all. Rated according to FTC specs, the TX-4500 delivers 55 watts minimum RMS per channel, both channels driven into 8 ohms over a 20 Hz to 20 kHz spectrum, showing less than 0,1% THD.

In addition, the TX-4500 also evidences exceptional transient response, the ability of an amplifier to follow sudden changes in the level of sound signals. Dual oscilloscope traces, with  a 50 Hz square wave fed through, have shown less than a 5% tilt.  Generally, conventional amplifiers under the same conditions have shown a 25-50% tilt.

Quartz-Locked Tuning Creates A New Degree of Tuning Accuracy In a radical departure from conventional FM tuner design principles, Onkyo engineering has created a quartz oscillator controlled circuitry for the most accurate station tuning possible. A superbly stable frequency is generated in a quartz oscillator, and this unvarying frequency becomes the reference for the tuned stages of the FM circuits. Even the slightest deviation from ideal tuning condition is detected instantly and compensated automatically, assuring razor-sharp tuning and minimum distortion at all times.

Automatic "Human Touch Sensor"
As you touch the tuning knob, a special sensor circuit detects your touch and releases the above-named quartz lock. Then, after you have tuned in another station and released the knob, the quartz circuit locks again. You need not even tune in a station very precisely, as the quartz lock will automatically compensate for tuning errors.

Enormous Reserve of Output Power!
The ultra-modern, all direct coupled amplifier section delivers 55 W of clean Onkyo power per channel into 8 ohms, over the entire frequency range from 20 Hz to 20 kHz, with both channels driven, at no more than 0,1% THD. In practical terms, this means that you have a tremendous reserve of power available to handle even sustained high volume levels and signal peaks without driving the amplifier into clipping distortion.

Total Control Over What You Hear and How
In addition to the standard balance, high and low filter, mode and loudness controls, the TX-4500 features click-stop volume and tone controls giving accurately reproducible settings. Its FM Muting Lock switch eliminates inter-station noise on FM, and its Dolby Adaptor switch establishes the correct (25