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Here's a new project I completed this morning using an OB Dayton Audio PS220-8 with an H-Frame Eminence Alpha 15. A DEQX processor is used as the crossover (150hz) and for equalization. My first impression is the subwoofers have a rich "vintage" quality, full and powerful but not especially well controlled. The Dayton point source drivers sound surprisingly clean, with a broad 6dB peak around 3.5khz that sounds bright on axis, but not so off axis. Just to get things going I added some equalization to minimize the 3.5khz peak and some other smaller anomalies, and I'm listening with the speakers toed-in, facing the listening position. For now I'm driving them with a pair of Emotiva UPA-2 stereo amps.
You need to do three things to the Eminence woofers to get good sound...
Does the wide baffle effect the sound much? JP
Does the wide baffle effect the sound much? I have seen the other versions of the oB dayton and noticed that increasing the baffle beyond 10 inches increases some of the driver issues-others are just fine.JP
You need to do three things to the Eminence woofers to get good sound:...2. You MUST damp the ringing speaker frame. Use EARSD40AL on all the struts. Much tighter and more musical sound
Hi Fred ~What "active" EQ are you using?
That EARS stuff is the stick on dampening sheets, commonly used on car doors to reduce noise/vibration. I use it on my alpha 15a drivers. My UK stuff has a foil outer, then a soft black layer, than a sticky surface for adhesion.
... I used Erling's suggestions for 'taming' the 8" Dayton Neo driver using a passive EQ arrangement ... With Warmest Regards ~ Richard / Ojai, California
EARSD40AL is a constrained layer damping material made by EAR... The only place that I know that stocks it is Michael Percy Audio (page 19 in his catalog). Not cheap ....
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