Heathkit

A-9B

Amplifier, Power

Main Details
Maker Heathkit Brand Heath Company Company
Function
Additional Model ID High Fidelity Amplifier Kit
Channels/Tracks
  • 1 × Channel
Signal Path Analog Hardware
Made In United States
Date Produced 1954
Dimensions
(H × W × D)
Weight 23lbs (Shipped)
Power Source 105-125VAC, 50/60Hz 100W
Frequency Response 20Hz-20kHz ±1dB
Notes Larger power transformer and improved output transformer compared against A-9A. Improved negative feedback circuit at second 12AU7.
Additional Specifications
Output Power 20W
THD (20W) 1%
Impedance Load 4/8/16/500Ω
Output Tube 6L6
Tube Complement 6L6G (x2), 12AX7, 12AU7 (x2), 5U4G
MSRP (1954) $35.50
Controls
Parameter: Tone (Bass, 30Hz)
Control Type: Rotary Pot
Range: ±15dB
Parameter: Tone (Treble, 15kHz)
Control Type: Rotary Pot
Range: ±15dB

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