Very few receivers have the current to drive Acoustat or any other planar for that matter. These require a least 100 WRMS perside in power with at least 20 amp in current delivery. Ideally you should be into a separate power amp and preamp to get the most from these speakers. Accoustats have a widely varying ohm load and can dip into the 1 ohm range depending on source material. The new batch of receivers on the market today just cannot handle that kind of ohm load, a few receivers back in thelate 70's and early 80's were capable such as a Luxman 1070 for instance, but nothing in the current line up of modern receivers can be expected to drive the Accoustats.
Accoustat are some of the most difficult to drive planar speakers ever made. Over the years have had several of the pass through here. With these model 4 I would use a 200 WRMS per channel amp to derive the most from them. Even with a proper amp they will not be able to be driven to ear splitting levels. I have found that Accoustat works the best with Jazz and Classical music as well as vocals.
They are a great speakers, just not for everyone.
Accoustat are some of the most difficult to drive planar speakers ever made. Over the years have had several of the pass through here. With these model 4 I would use a 200 WRMS per channel amp to derive the most from them. Even with a proper amp they will not be able to be driven to ear splitting levels. I have found that Accoustat works the best with Jazz and Classical music as well as vocals.
They are a great speakers, just not for everyone.