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RE: (Long)It's the combination of an OTL amp and the inductive x/o used with the Peerless woofers. Plus

Posted by jeffmathers on April 19, 2012 at 09:11:30:
"Just to see if the midbass improves any by placement change try rotating the speakers so that the Peerless woofers are facing the listening seat and listen in the near-field, since the midrange module is 90 degrees to the woofer have the mids firing at each other to the middle of the room. This will not give the best midrange but will allow you to focus on the quality of the midbass and see if any improvement is possible in that room. Another odd setup to try is to position the speakers along the long wall but not conventionally. Place the cabinets very close to each other with the woofers facing the listening seat and the mid cabs the reverse of the above firing away from each other at the side walls. Now, you will be considerably off axis to the midrange 90 degrees then try slight amounts of toe-in and see if a better balance is possible."

Actually, the midwoofer/tweeter units are in separate cabinets that sit atop the bass units. So we could fire the woofers at the listening position and rotate the upper cabs to fire the same way. Same on the long wall.

Thanks for the explanation of the crossover and OTLs. Interesting stuff. It may explain why when switching to another set of amps or amp the mid bass saw some improvement. It suggests to me that the issue is a combination of amplifier and room.

Cheers
Jeff