McIntosh C504

Commentary

Compact size control amplifier.

IC is used for all input changeover switches.
By turning the circuit ON/OFF with a minute DC voltage, we have succeeded in suppressing switching noise without affecting frequency characteristics.

± 12 db adjustment is possible for each frequency of 30 Hz, 750 Hz and 10 kHz, and the sound quality adjustment is free.

The loudness control can be controlled continuously with the "LOUD" knob.
The FLAT position provides maximum volume and a flat frequency response, while turning it to the right reduces volume and increases the loudness effect.
The Loudness effect is a system that controls the balance between volume and quality by increasing the low-frequency range to match the characteristics of the human ear when listening at a lower volume.

Model Rating

Type	Preamplifier
Frequency characteristic	20 Hz to 20 kHz
Distortion factor	0.02% or Less (20 Hz ~ 20 kHz, at 2.5 V Output)
Input Sensitivity / Impedance	Phono1, 2 : 2.2mV/47k Ω (50 pF) AUX, Tuner, Tape1, 2 : 250mV/47k Ω
Hum and noise (signal-to-noise ratio)	Phono1, 2 : IHF 90 dB, 10 mV or less AUX, Tuner, Tape1, 2 : IHF 100 dB, 250 mV or less
Output Level / Impedance	Main output : 2.5V/100 Ω or less Tape output : 250mV/200 Ω or less
Equalizer characteristics	30 Hz, 750 Hz, 10 kHz : ± 12 dB
Semiconductor used	15 tr, 14 fet, 11 di, 11 ic
Pwer	120 VAC, 50Hz/60Hz
Power consumption	45W
External dimensions	Front Panel : 406 mm wide x 92 mm high Body : Width 375x Height 60x Depth 368 mm
Weight	6.4kg