This is what the fellow said that returned it:
After testing this receiver today, I found a number of defects. The right channel volume will not go to zero. It actually remains quite loud when the volume control is turned to zero. The DAD and both tape inputs are intermittent. The loudness control is non-functional. And the left channel has significantly lower volume than the right channel. Note that I did not test the phono input or the tape inputs. 

Here's the original description:

The Proton D940 has all the features you’d want but it’s mainly known for its Dynamic Power On Demand (DPD) feature. Its continuous power rating is 40 wpc but upon demand it can supply short term peaks of up to 160 wpc into 8 ohms or 280 wpc into 4 ohms. That’s some serious dynamic headroom.

This Proton D940 from the early 1980’s is an interesting receiver. It has a lot of similarities to the NAD receivers of the time. That’s because NAD and Proton used the same manufacturer in Taiwan to produce their components. On the market from 1985 until 1991, the D940 produces 40 watts per channel and retailed for $449.95. It’s got a small footprint but packs a pretty good punch.

The tuner on the D940 is interesting too. It utilizes the Schotz Noise Reduction, or SNR, circuit developed by Larry Schotz. The circuit is used to remove noise from FM broadcasts without altering frequency response. In short, it uses just the right amount of channel blend to reduce noise levels without harming stereo separation. This allows the D940 to bring in distant channels with great clarity. Ordinary noise reduction circuits can over blend the channels, especially when the signal is strong. You can activate or defeat the Schotz circuit via the button just below the tuning display.

There are station presets for 8 FM and 8 AM stations. Stations can be found via auto search, manual tuning or by entering the frequency numerically.

Specifications:


Thanks for bidding!