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View Full Version : butterworth, quasi bessel



Trey803
07-07-2006, 05:15 PM
Well what the hell does butterworth, quasi bessel, and enhanced q mean? RL-i specs

PV Audio
07-07-2006, 07:56 PM
They're different box alignments (Qtc). Basically, they are three different enclosures with different roll-offs and characteristics and thus different frequency responses. The actual names though are mostly dead and gone engineers :)

Trey803
07-08-2006, 08:59 AM
So which one would be the best to use?

PV Audio
07-08-2006, 12:35 PM
I'd pick the one with the latest rolloff and the one with the smoothest line.

Trey803
07-08-2006, 12:41 PM
They all have about the same rolloff slope but different points. What would you guys recomend for a RL-i10"

PV Audio
07-08-2006, 12:41 PM
Dude post up the graph, I can't visualize it in my mind :)

Trey803
07-08-2006, 12:47 PM
http://memimage.cardomain.net/member_images/6/web/2214000-2214999/2214971_40_full.jpg

blue93corsica
07-08-2006, 04:00 PM
the most linear freq, is butterworth's which is a qtc of .707

carguy83
07-08-2006, 09:55 PM
Mike did not suggest aiming for a qtc of .707 for my RL-p.


I wouldn't recommend going with a box volume that reaches the most-often desired Q of .707. These drivers are not optimized for such an alignment, as the 0.707 Q enclosure is much smaller than I would suggest for a quality realized frequency response. Following this typical line of advise will result in your driver producing heavily muted low frequencies - and with a subwoofer, low frequencies are what are the most important!

That was for my sub, but I'm not sure for the RL-i series. Trey803, I would recommend you email Mike about your enclosure size, or just use the specs recommended on the SS website.

denim
07-10-2006, 12:17 PM
They all have about the same rolloff slope but different points. What would you guys recomend for a RL-i10"
head over to the SoundSplinter Forum (http://www.soundsolutionsaudio.com/forum) and see what people are using there. ;)