4-Channel Amplifier AA-2010

• alternative name: Heath Company

The Heathkit AA-2010 is a vintage 4-channel quadraphonic integrated amplifier first introduced in the early-1970s (approximately 1972). It is unique for featuring two completely independent preamplifiers and power amplifiers within a single chassis, effectively functioning like two separate stereo units that can be used for quadraphonic sound or multi-zone audio. 

Technical Specifications:
According to documentation from eBay and enthusiast forums, the AA-2010 has the following power ratings and performance specs:
Dynamic Power Output: 50 watts per channel into an 8-ohm load (65 watts at 4 ohms; 30 watts at 16 ohms). 
Total Harmonic Distortion: Less than 0.25% from 5 Hz to over 45 kHz. 
Frequency Response: -3 dB at 9 kHz and 14 dB at 20 kHz. 
Input Sensitivity: Phono is 2.2 millivolts; Tape and Aux are 180 millivolts. 
Signal-to-Noise Ratio: -65 dB for Phono and -75 dB for Tape/Aux. 
Circuit Design: Uses a quasi-complementary design with MJ2841 output transistors.

Key Features:
Quadraphonic Controls: Features 4-channel decoding for quadraphonic sources and records. 
Visual Indicators: Equipped with four "cool green" power meters on the front panel with a switchable range. 
Independent Dual Zones: Because it contains two independent preamps, it can run two different rooms (e.g., family room and another room) with completely separate inputs and outputs. 
Aesthetic Build: Housed in a pecan wooden case (opional extra $24.95 USD) with a silver and black aluminium faceplate and matching knobs.

In questo link sono elencati 816 modelli, di cui 799 con immagini e 515 con schemi.
Elenco delle radio e altri apparecchi della Heathkit (Brand), Heath Co.; Benton Harbor (MI)