Audio Innovations
A tube amp made for people who loves muisc.
The Audio Innovations Series 500 is the kind of amp that makes you question everything you thought you knew about hi-fi. Released in the late ‘80s, it was part of a movement that brought tube amps back from the dead, proving that low power, high-quality Class A valve designs could still wipe the floor with overengineered solid-state brutes. If you’ve ever wondered what pure musicality sounds like, this 25-watt, EL34-powered beauty is your answer.
Type Tube Integrated Amplifier
Architecture Class A
Power output 25W into 2 CH at 8Ω
Frequency Response 30Hz - 20kHz ±3dB
Total harmonic distortion THD<0.15% between 80Hz-15kHz @ 1W
Tube Complement 2x ECC82 1x ECC83 2x PCC88 4x EL34 (9 total)
Power Requirements 115V AC (north american model)
Line In Tuner / CD / Aux / Tape / Monitor
Line Out Tape 1 / Tape 2
Speaker Outputs 4/8/16Ω
Speaker Terminals 5-way binding post
Crosstalk Better than 78dB
Input sensitivity 400mV (max. signal voltage 3V, excluding phono)
Channel separation > 78dB
Input impedance 100KΩ
RIAA equalizing accuracy < 0.1dB between 20Hz - 20kHz (phono input)
Negative feedback depth 14dB

