Onkyo M-504 Stereo Power Amplifier Dual Green Power Meters 165WPC
Experience true high-fidelity power with the Onkyo M-504, one of the brand’s most iconic amplifiers. Its striking dual green-illuminated power meters, massive transformer, and wide-bandwidth design deliver clean, effortless dynamics with excellent control over demanding speakers. A favorite among collectors and audiophiles, the M-504 combines visual impact with serious performance. Fully serviced, tested, and performing beautifully. Own an Onkyo classic, SpenCertified, and ready to elevate your system.
CONDITION
Refurbished and SPENCERTIFIED
SPENCERTIFIED - Fully certified by Spencer
100% tested and functional. Cleaned inside and out; worn parts replaced as needed. Controls, switches, and internal contacts cleaned with WD-40 Specialist Electrical Contact Cleaner. Boards inspected. Speaker terminals cleaned. Boards inspected, DC offset checked, output stage verified, and cooling path cleaned.
Cosmetic Condition: 8/10 (Small Chips)
Functional Condition: 10/10
📦 Professionally packed and shipped with care
What's in the box?
- Onkyo M-504 Stereo Power Amplifier Dual Green Power Meters 165WPC
FEATURES
- Power output: 165 watts per channel into 8Ω (stereo)
- Frequency response: 1Hz to 100kHz
- Total harmonic distortion: 0.003%
- Damping factor: 140
- Input sensitivity: 1V
- Signal to noise ratio: 120dB
- Iconic dual green-lit power meters
- High-current power supply with a large transformer
- Wide-bandwidth, low-distortion performance
- Dual-mono-inspired internal layout
DIMENSIONS
- Size: 17.1" × 7.2" × 15.5" (W × H × D)
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Weight: 33 lbs
INPUTS
- Analog Audio x1 L/R (back)
OUTPUTS
- Speakers x2 L/R (back)
- AC x1 (back)
MANUFACTURE DATE and PLACE
- Made in Japan
