Recent content by pickindoug

The amateur radio industry has been using oil filled dummy loads for years. They're 50 ohm impedance (but quite possibly that's also the resistive spec). See Heath Cantenna. It may be adaptable to audio power measurement. I have a few amps that can exceed my Tenma 100 watt stereo dummy load...

Mike, that is good to know. Until I started measuring, I was convinced this was the best listening room I've ever had. And it still is, but it is amazing what small moves in speaker placement can do. Unfortunately, the null has so far been immune from placement.

Mike-48, Thanks for the thoughts. The null valley spans about 10 Hz peak to peak, which is a lot to lose in that Hz range. I'm really surprised I don't hear it with as much absence as the graph indicates. Probably should try the same mic / interface setup in another room to ensure it's not...

Mike-48, appreciate your thoughts. I don't have issues with slap echo thanks to the area rug and the acoustic ceiling tiles. I have played bass guitar for many years, and am typically critical of systems that don't provide well defined bass. Oddly enough, with 42-43Hz falling in the lower end...

Sonnie, I appreciate your input. All measurements were taken at the listening position. The equipment wall is one of the "monuments" that can't be changed, nor can I block off the smaller portion of the room in an effective way. There is a TV in the middle of the wall over the equipment rack...

Hoping to get feedback from the voices of experience in the group. Room dimensions are attached. It is a basement room with vinyl over concrete. There is a 9' high drop ceiling with good quality 2 x 2 acoustic tiles, a sofa at the X listening position, a love seat along the wall with the dog...