Adam's Northwest Estate Sales & Auctions

Vintage Harman Kardon 730 “Twin Powered” Stereo Receiver – Made in Japan (1970s)

An iconic piece of vintage audio engineering — the Harman Kardon 730 Twin Powered stereo receiver, renowned for its warm analog sound and dual power supply design. Built in Japan during the golden age of hi-fi, this receiver is prized by collectors and audiophiles for its distinctive look and outstanding performance.

Details:
🎛️ Model: 730 Twin Powered
🏭 Made in: Japan
📅 Era: Late 1970s
🔋 Power Output: 40 watts per channel (RMS, 8Ω)
🎶 Design: Dual mono power amplifiers for improved stereo separation
📡 Tuner: AM/FM with analog tuning scale and signal strength meter
🎧 Inputs/Outputs:

• Phono (turntable) input

• Two tape monitor loops

• AUX input

• Pre-out / Main-in jacks (for external amp or EQ integration)

• Dual speaker systems (A/B)

• Headphone output
  ⚙️ Controls:
  Bass, Treble, Balance, Volume, Hi-Cut, Lo-Cut, Contour, Mono

Condition:
Excellent vintage condition — all knobs and switches intact. Lights and meters function properly. Some minor cosmetic wear consistent with age.

Dimensions:
Approx. 17” W × 6” H × 14” D

Description:
This classic Harman Kardon 730 delivers rich, dynamic sound with exceptional clarity — a perfect choice for vinyl enthusiasts or anyone seeking that true vintage hi-fi tone. Highly sought after for its “Twin Powered” architecture, which provides independent power supplies for left and right channels, reducing crosstalk and improving fidelity.

✨ A beautifully preserved example of 1970s audio craftsmanship — both functional and collectible.

⚠️ Important Pickup & Access Disclaimer

Please note: This estate is located at the top of a steep, narrow, and winding private road where all-wheel drive or 4-wheel drive is recommended for safer access. The owner of the estate has paid to have the driveway improved to make access a little more manageable for bidders. Amazon has made deliveries to this property, and moving trucks have also been able to reach the top. However, this does not eliminate the risks associated with the terrain.

To assist bidders, most small items will be boxed and transported to a POD located at the bottom of the hill for easy pickup.
However, all large and heavy items must be picked up directly from the estate. Buyers of these items are responsible for bringing the proper vehicle, equipment, and assistance needed for safe removal and transport.

Adam’s Northwest Estate Sales & Auctions and the property owners are not responsible for any vehicle damage, towing costs, or personal injury related to accessing or navigating the property. Please plan accordingly before bidding.