Pioneer Series 20 M-25 Vintage Stereo Power Amplifier; M25

Product: Pioneer Series 20 M-25 Vintage Stereo Power Amplifier; M25

Product SKU: 18080

Serial Number: YH3600208M; YH3600202M

Voltage: 120V

Cosmetic Description: 8/10 Excellent condition with minimal visible cosmetic wear including two or three very small nicks on the top edge of the front, a couple light rub marks on the transformer covers, and a few small random nicks along the heatsink fin edges. This item shows some wear consistent with its age but is still presentable and sounds wonderful.

What is Included: Amplifier only as shown.

Functional Notes: Operational condition of this item is excellent, fully tested and no issues found.

Age: Circa 1980

# of Owners: 2

Tobacco Exposure: No

Service History: None

Other Notes: "The M-25 was rated at 120 watts continuous, per channel with both channels driven into 8 ohms from 5 Hz to 30,000 Hz, with no more than 0.01% total harmonic distortion. In fact, this amp could reproduce ultrasonic frequencies up to 80 kHz with only 0.05% THD! Why have such capability beyond the range of human hearing? Pioneer stated: "It is essential to the high quality of signals within the hearable range that those beyond that range are handled cleanly in order to avoid harmonic distortion and other harmful irregularities. And this the M-25 does with impressive accuracy, at full power."

To do this, Pioneer employed newly-developed Ring Emitter Transistors (RETs) instead of Field Effect Transistors (FETs). The RETs had better high frequency characteristics. It employed all the high-grade semiconductors as those used in the M-22, and the same 22,000 microfarad power capacitors. It naturally had higher output power supplies." - Stereomono

Product Specifications

Reviews:  Stereomono

Shipping: Cost to ship this item within the contiguous United States is a flat rate of $65- including packaging and insurance. For all other locations including Hawaii, Puerto Rico and Alaska, please request a quote prior to purchase. Items with factory packaging will be double boxed. When factory packaging not available re-usable shipping box with custom injected-foam mold will be used. (for all items over 10 lbs). Note that all items valued over $500 will require a signature upon delivery.