Nikko Alpha 230 Vintage Power Amplifier – 120 WPC

A mid-1980s Nikko Alpha 230 stereo power amplifier, made in Japan, rated at 120 watts per channel into 8 ohms. It has been tested on our bench and is in very good condition.

What it is

The Alpha 230 is a well-regarded Nikko DC power amplifier from the years when the company was building some of its most serious gear. It is a straightforward, muscular design: a DC-servo amplifier with a variable-bias, non-switching output stage, rated at 120 watts per channel into 8 ohms and 200 watts per channel into 4 ohms, with distortion of just 0.008%.

The front panel is all business. A column of LED power meters reads output from a hundredth of a watt up to 240 watts, a protect lamp watches over the output stage, and A and B buttons switch between two pairs of speakers. There is a headphone jack on the front, and rack-mount ears either side if you want it in a rack.

On the back, a Direct/Normal switch selects the input. Direct is Nikko’s DC input, the one that gives the Alpha 230 its frequency response all the way down to 0 Hz. As a power amplifier it has no volume control of its own, so it pairs with a preamplifier, or with a receiver or integrated amplifier that has preamp outputs.

A well-regarded 120-watt Nikko power amplifier, tested and ready to drive your speakers.

Available for pickup in Kanata, or shipped across Canada and internationally — we have sent equipment to fifteen countries in the past year, each piece packed in-house in 275 lb test double-wall boxes. Live shipping rates for your address are calculated at checkout. Backed by Radique Audio’s Bumper-to-Bumper Warranty and our Perpetual Trade-Back Program. Available for audition by appointment in Kanata.

Nikko Alpha 230 Vintage Power Amplifier Specifications

• Type: stereo power amplifier, DC-servo, non-switching output stage
• Service: tested on our bench
• Power output: 120 watts per channel into 8 ohms; 200 watts per channel into 4 ohms (DIN)
• Frequency response: 0 Hz – 100 kHz (Direct input)
• Total harmonic distortion: 0.008%
• Damping factor: 70
• Input sensitivity: 1 V
• Signal-to-noise ratio: 115 dB
• Meters: LED power display, 0.01 to 240 watts
• Outputs: speakers A and B, headphone jack
• Inputs: RCA, with Direct / Normal switch
• Rack-mount ears
• Made in Japan
• Dimensions: (Width x Height x Depth) 17.3 x 5.4 x 13.5 inches (440 x 138 x 344 mm); 19 inches (482 mm) across the rack ears
• Weight: approx. 29.7 lbs (13.5 kg)

⚠️ Important Information for International Buyers

This unit is configured for North American 110/120V power. Buyers outside North America will require a step-down transformer and appropriate plug adapter.

✅ Buy With Confidence — The Radique Promise

Backed by Radique Audio’s Bumper-to-Bumper Warranty and our Perpetual Trade-Back Program. When you’re ready to move on, we’ll take it back. That’s the Radique difference.

📦 Watch how we protect your gear — our unboxing video.

📺 Curious about our business? Check out our YouTube channel for behind-the-scenes videos and more!

📞 Questions? Use the Ask a Question button above, or call us at 613-416-9995.