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In the Forum: Audio Discussions
In the Thread: Lowther Driver
Post Subject: A small box for PM4APosted by Paul S on: 11/21/2006
I confess that at one point I tried PM6As in 2.5 cu. ft. vented boxes. Lousy, tipped-up balance and soggy, one-note "bass", contrary to the designer's claims. The only thing good about it was that the box did not add color like Lowther horns I've heard. Having been through this, I decided that a small sealed box, maybe 1 - 1.5 cu. ft., would be a better way to do it; just high pass the Lowther and add notch filters to bring down the 2.4k and 8k spikes, top it off with a blended-in tweeter. No way to tell what the box loading would do to the PM4As character until you try it.
Biggest problem I see with it is deciding the best compromise for a low pass and/or LF crossover. Many have reported extreme difficulty getting bass that meshes seamlessly with the Lowther. I cross at 150 Hz, bass chores handled by a 15" Audax P380MR. I cannot hear the difference crossing with that woofer at that frequency.
Best regards,
Paul SRerurn to Romy the Cat's Site