Heathkit AA-11 Stereo Preamplifier

Channels:		2

Inputs:			5 stereo each channel and 2 monophonic.

Input Impedance:	Tape head, 220 k ohms
			Phono, 47 k ohms for magnetic, 75 k ohms when used with ceramic
			Microphone, 500 k ohms
			Multiplex 600 k ohms and Aux, 600 k ohms
			All monophonic inputs 600 k ohms input impedance

Outputs: One low impedance to power amplifier and one low impedance to tape recorder in each channel plus a "derived center channel" monophonic output at 10 k ohms impedance.

Frequency response:	± 1 db from 15-30000 cps.

Harmonic distortion:	Max. .15% @ 2.5 volts output.

Intermodulation distortion:	Max. .3% @ 2.5 volts output.

Hum & noise All values relative to 2.5 V rms output; 2.5 mv input at Tape Head input, 50 db or better; 6 mv input at Mag. phono input, 60 db or better; 2.5 mv input at Microphone input, 60 db or better; .1 volt input at Aux. 75 db or better.

Channel separation:	1 kc, 40 db or better.

Rumble filter:		3 db down at 42 cycles. 12 db attenuation per octave

Scratch filter:		3 db down at 6 kc. 20 db attenuation per octave

Baxandall tone controls: 12 db boost, 16 db cut at 20 cps; 12 db boost, 20 db cut at 20,000 cps

Controls:		Separate Bass & Treble, each channel
			Volume-Loudness
			Blend
			Balance
			Rumble Filter
			Scratch Filter
			Volume-Loudness switch
			Stereo-Mono switch
			9 push button Source Selector switch
			Phase Reversal switch
			Channel Reversal switch

Tube complement:	(8) - 12AX7
			(2) - 12AT7

Power requirements:	117 V AC 50-60 cycles.

Dimensions:		5½" H x 11½" D x 15 5/8" W

Weight:			18 lbs