Vintage Tube Amp

Harman Kardon FA3000X Vacuum Tube Receiver Amplifier For Parts / Repair. Meet the Harman Kardon FA3000X, a mid-1960s vacuum-tube powerhouse that delivers warm, golden-age hi-fi vibes with serious vintage swagger. Loaded with classic tubes and about 15 watts per channel of smooth analog magic, this Award-Series receiver brings Harman Kardon’s legendary early-era engineering straight into your listening room. Perfect for tube lovers, vinyl heads, and anyone craving retro sound with modern bragging rights-this glowing beauty is pure audiophile time-travel. Power Output: 15 Watts Per Channel into 8? (Stereo). Frequency Response: 15Hz to 70kHz. Total Harmonic Distortion: 1%. Input Sensitivity: 3mV (MM), 125mV (line). Signal to Noise Ratio: 60dB (MM), 75dB (line). Speaker Load Impedance: 8? To 16? Dimensions: 16″ x 14″ x 7. Listing and template services provided by inkFrog.

The stock circuit had four 6550 output tubes in parallel push pull. Stamped codes on base are FT5426433 and 138243E. Please ask questions if you have any. Item has finish imperfections and wear. Only what is pictured and described is included – if unclear, then ask to clarify.

Harman Kardon Trio A224 Vintage Tube Amplifier Classic Audio Model A224.

Harman Kardon Allegro A10 Tube Amp Audio Amplifier Mono. The Harman Kardon Model A-10 Allegro is an AC operated 5 Tube 3 Channel Audio Amplifier. Untested, assume not working. Need additional tubes to run it. Power type and voltage. Alternating Current supply (AC) / 105 – 125 Volt. This model requires external speaker(s). 10 W 16 W max. 12 x 4 x 6 inch / 305 x 102 x 152 mm. Thanks for considering?? Be sure to check out our other vintage electronics for sale!

Actual 1957 Tube amplifier photographed. 1957 top of the line.

Harman Kardon Allegro A10 Tube Amp Audio Amplifier Mono. The Harman Kardon Model A-10 Allegro is an AC operated 5 Tube 3 Channel Audio Amplifier. Untested, assume not working. Need additional tubes to run it. Power type and voltage. Alternating Current supply (AC) / 105 – 125 Volt. This model requires external speaker(s). 10 W 16 W max. 12 x 4 x 6 inch / 305 x 102 x 152 mm. Thanks for considering?? Be sure to check out our other vintage electronics for sale!

Actual 1957 Tube amplifier photographed. 1957 top of the line. Open to fair offers.

Harman Kardon Allegro A10 Tube Amp Audio Amplifier Mono. The Harman Kardon Model A-10 Allegro is an AC operated 5 Tube 3 Channel Audio Amplifier. Untested, assume not working. Need additional tubes to run it. Power type and voltage. Alternating Current supply (AC) / 105 – 125 Volt. This model requires external speaker(s). 10 W 16 W max. 12 x 4 x 6 inch / 305 x 102 x 152 mm. Thanks for considering?? Be sure to check out our other vintage electronics for sale!

Untested as found at a local estate, offered as is for parts or restoration. Tubes are visible inside the unit. Unit advises not to open, we are offering it as is.

Harman Kardon Allegro A10 Tube Amp Audio Amplifier Mono. The Harman Kardon Model A-10 Allegro is an AC operated 5 Tube 3 Channel Audio Amplifier. Untested, assume not working. Need additional tubes to run it. Power type and voltage. Alternating Current supply (AC) / 105 – 125 Volt. This model requires external speaker(s). 10 W 16 W max. 12 x 4 x 6 inch / 305 x 102 x 152 mm. Thanks for considering?? Be sure to check out our other vintage electronics for sale!