Members malcatron Posted February 9, 2010 Members Share Posted February 9, 2010 I currently run my Peavey UL115 subs ( UL115 spec ) from a PV1500 (PV1500 spec)using the amps built in crossover. The crossover is fixed at 150Hz and the HPF is fixed at 40Hz. Now, the subs have a published freq response low end of 60Hz and my question is basically - is the 40Hz low cut on the amp sufficient to protect my subs? If not I have been thinking about possibly adding a crossover, using it in 3-way mono, sending the high out (say > 120Hz) to the mains, the mid out to the subs and then setting the crossover freq between mid/low to act as a low cut for the sub. (i.e. nothing connected to the low output) Is this a viable/worthwhile exercise or am I talking out my arse? Link to comment Share on other sites More sharing options...
CMS Author Craig Vecchione Posted February 9, 2010 CMS Author Share Posted February 9, 2010 I currently run my Peavey UL115 subs ( UL115 spec ) from a PV1500 ( PV1500 spec)using the amps built in crossover. The crossover is fixed at 150Hz and the HPF is fixed at 40Hz. Now, the subs have a published freq response low end of 60Hz and my question is basically - is the 40Hz low cut on the amp sufficient to protect my subs? If not I have been thinking about possibly adding a crossover, using it in 3-way mono, sending the high out (say > 120Hz) to the mains, the mid out to the subs and then setting the crossover freq between mid/low to act as a low cut for the sub. (i.e. nothing connected to the low output) Is this a viable/worthwhile exercise or am I talking out my arse? If your active crossover has the ability to do this, it's a very good idea, as 40Hz is almost certainly too low to adequately protect the sub. Link to comment Share on other sites More sharing options...
Members agedhorse Posted February 9, 2010 Members Share Posted February 9, 2010 I'll bet most 3 way crossovers will not allow this to work because the frequency point will not go down low enough. Sounds like you are going to spend money on a solution so that you can be cheap elsewhere. a 40Hz HPF will be ok with that amp, provided you use a little bit of reason and common sense. 150Hz as a crossover freq. is fine too. Link to comment Share on other sites More sharing options...
Members banddad Posted February 10, 2010 Members Share Posted February 10, 2010 How about an equalizer with a variable HPF on it? It may be a more elegant solution. Link to comment Share on other sites More sharing options...
Members malcatron Posted February 10, 2010 Author Members Share Posted February 10, 2010 The thinking behind this was really to keep things simple, I thought having something like a driverack and not really knowing what I'm doing with it could be a recipe for disaster. Looking at the dbx 223 the frequencies will cover the ranges I'd need Mono Mode: Low/Mid: 45 to 960 Hz or 450 Hz to 9.6 kHz (x10 setting) Mid/High: 45 to 960 Hz or 450 Hz to 9.6 kHz (x10 setting) If I were to do this, would 60Hz be the best setting for the "HPF" or would slightly below be beneficial?? I do like the idea of an Eq with a variable HPF though, as I'd also be getting an Eq into the bargain any suggestions as to models that offer this feature? Cheers Link to comment Share on other sites More sharing options...
Members agedhorse Posted February 10, 2010 Members Share Posted February 10, 2010 I would look at 50Hz because the x-over filter alignment is LR. I think you are over-thinking this though. Link to comment Share on other sites More sharing options...
Members banddad Posted February 11, 2010 Members Share Posted February 11, 2010 There are a few EQ's with a HPF.Ashly makes a really good one, check out the GQX 3102.Rane makes a nice one as well.ART makes a lower priced unit, the HQ231 or others.And I'm sure there is someone else's favorite I missed. I have the ART and Ashly units, the Ashly has a better feel, lower noise, and will probably last forever. I find the ART works well for me as an ocassional 'weekend warrior' type who is in this for fun, not profit. Link to comment Share on other sites More sharing options...
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