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Have a crown 402 amp bridged to a Peavey PV 118 sub. Has very little thump what do i need to do
FULL SYSTEM

Laptop / Turtle Beach External Sound Card/ Behringer Super X Pro CX2310 Crossover/ Amp 1 Bridged to Two Yamaha BR 15" Speakers/Amp 2 Bridged To Peavey PV 118 sub



Please Help Thank You

You need a more powerful amp. According to specs that amp is 300wpc@8ohms and only 400wpc@4ohms with 800wpc in bridged mode, I suspect that's wishful thinking. That amp isn't suitable for running an 18 inch sub. It probably works great for running tops which is a much less demanding task and it has plenty of power for those BRs.

A couple of inexpensive options are the Behringer EPX3000 which puts out around 500wpc@8ohms, 900wpc@4ohms and has a built in crossover. You could run your tops and the sub off one amp and it's only about $369 on ebay or maybe at one of your favorite audio suppliers. The other option will be available within the next few weeks or so, the Peavey IPR3000 with nearly the same specs except the Behringer can go down to 2ohms and can be bridged, the Peavey cannot. The Peavey weighs in at around 8 pounds and will be selling for $400.

Sell the Crown amp for $50 or $75 less than you paid for it or keep it as a backup, but it just doesn't have the balls to run your sub.

If he is only running one PV115, then that amp is more than adequate since those subs only require 400 watts to begin with. The amp pushes 900 watts in bridge mode - so yes it has enough power to push the sub with no problem.
I am guessing it's in either a crossover setting or the amp is not actually bridged. But not knowing what the other amp for the BR15's are, that could be a factor. Also bridging the 2 BR15's could be harming the other amp if it's not capable of a 4 ohm load and possibly WAY overpowering the speakers ratings at 4 ohms.
But no you do not need to Crown amp. But a little more info on the other amp and why you are bridging the top speakers could help in this situation.

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He said it was a PV 118 not a 15 inch sub.

I have a PV 1500 amp that puts out almost the same power that the Crown does and it's wimpy, only suitable for running tops, it doesn't have what it takes to run an 18inch sub IMO. I've run it in bridged mode and it just doesn't sound very good.

The PV 118 is only 400wpc@8ohms and here is the kicker: only 95db @ 1W/1m. This isn't a high output sub, but what can you expect for $250 brand new? This is an entry level speaker that is just not going to compare to better quality subs.

So what do you have here? Low powered, entry level amp and a low powered entry level sub. Result? Poor output.

I mistyped, the PV118 sub is rated at 400 watts program power.


Depends on the sub & how it's crossed over. A PV1500 is more than plenty as well to push 1 8 ohm 18" sub with no problems. 1000 watts is more than most powered subs are rated today.


Sorry, something is not set right or turned up properly, even entry level stuff can be made to sound proper. And I had already stated that sub is only rated at 400 watts program. That Crown amp is more than adequate to push. But again, he didn't state what amp he is using to push the tops so it's possible he's overpowering the tops.


Again, yes they are entry level - the Crown is not crap in any respect, the Peavey subs aren't real high in the sensitivity - 1 less than the (much used by many kj's) JBL JRX118 sub, but that isn't going to make them unuseable and can still work. In this situation, it's most likely a wrong crossover point or the amps are not simply turned up high enough.

But since the OP has not chimed in since, we can only speculate at this point.

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I never said the Crown amp was "crap", I said it was an entry level amp better suited for running tops-it's not a very powerful amp by today's standards.

I could run my EV Sb122 subs off of it, but they are very efficient and can even run off less power than that. It may well be that the OP doesn't have the amp turned all the way up or it's not bridged properly or the crossover point isn't set at the right frequency.

Nice thing about my subs compared to some passive subs is that they have a 150hz filter and a high pass built in so I can have a top and a sub on the same channel of my amp. without using a crossover. It's not the optimal setup, but it works fine. I don't know if the PV118 or JRX sub has this.

It depends on the speaker it's trying to run - in this case it's more than adequate. And I never knew there any 'standard' for todays systems? It pushes 800 watts into 8 ohm in bridge mode - again, this is more powerful than most powered subs that many karaoke companies are using today - so not sure what the reasoning there is.


That's exactly what I think the problem is.


Many subs do not have a built in crossover. I have a set of Peavey 18's that also have the built in crossover, but I don't use it as it's set higher than I normally run it. It's nice to have that option though when only running one amp.

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Sorry for leaving out some details

laptop= Input to 5 &7 both pan left Behringer xeny 1202FX /Out to input to Behringer Super X Pro CX2310 Crossover/ High out to Crown 402 amp bridged to two Yamaha BR 15" cable from # 1 spkr. To #2 i think 4 om.
Also Crossover/Low to a second Crown 402 amp bridged to Peavey PV 118 sub.
Settings 2 way stereo, low mid/input -4/ x frq 120/low output +8/high out +6/sub frq 85/gain+6.
Yes this is entry level equipment. I am not a pro. I just do some party's in my back yard and a couple friends yards
I think entry level pro equipment is much better then top line home equipment.
And except for the bass this equip ROCKS about 2 blocks of my Town.




Thank You For Response

Reset all to '0" and start over. All you gains are set too high on the crossover.
Use the Crown for the BR15 in a stereo configuration - ie 1 speaker per channel. You cannot bridge the 402 to 4 ohms without the risk of blowing it out. When you bridge two 8 ohm speakers together, the load becomes a 4 ohm load which the 402 is not capable of in a bridged mode.
Use the other Crown bidged to the one sub.

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That did it. WOW I can feel it in my body. Put on ZZ Top under pressure and the house is bouncin.

Thanks. You Guys No Your Chit