I have no bass at all. The amp is connected to 4 speakers (in series) of lower power as I was told this gave better quality? When I turn the power off the left red clip light turns on and I hear a little pop. Help is much appreiciated!! Hi All, I have a quick question, is it ok to run 4 speakers through 1 Behringer 2500 amp? Amy speakers are all 8ohm. If so how should i do this? Many thanks, great website by the way! Glenn
If after the pop it smells like a firecracker just went of than you fried the circit for that speaker or if it has fuses on it or ferther down the wire check them but it could be just the radio and nothin to worry about:)
a friends car does it, and it is very anoying
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I can't give you a definite answer but I suspect the Peavey speakers with their four wires require a different sort of amplifier.to the conventional type.
You will be aware in lots of speaker enclosures are one or two drive units and a tweeter. Ensuring the right frequency of signal goes to the right speaker will be a filter or crossover which is also housed in the enclosure. This has been the common way to deliver a good sound forever.
There has been a fashion for delivering a good sound differently by placing the filter network or crossover in the pre-amp stages and then delivering the different frequency signals to two, three or more power amplifiers, each one designed to amplify a particular frequency range and in this way fewer compromises are made to the purity of the resulting sound. Each amplifier would have an output through a pair of wires destined for the drive unit is was designed for.
Two and three rack amplifiers have been a very popular way of delivering sound in cinemas, in particular a powerful bass. I haven't personally been involved with such an amplifier but I remember the magazine Wireless World publishing a series of articles about the system and the instructions for building one.
These are just my thoughts on the matter and your next step would be to examine the internal wiring of your speakers to be sure.
With four plug you will have a jumper from on plug to the other. (e.g. Positive to positive and negative to negative.) This is for single connection (two wires.) If you use two connections (four wires) you take out the jumpers. the bottom pair is normally for the bass and the top for treble. This is to make the speakers clearer, and sound better. As for louder,? I don't know some people think it does some don't. With better clarity of sound, you do get the feeling of it being louder.
You can do that but your subs will have to be monsters or you will blow them out as bridged mode will drive 2400 watts RMS into 4 ohms. Many speakers are rated in peak or program power... these are FAKE specifications. with this amp in bridged mode each of two identical speakers would have to be rated at 2400 watts program or about 3600 watts peak each to survive... When rating speakers and amps ALWAYS compare RMS values... and for safety use an amp of 80% of the RMS rating of the connected speaker or speaker system.
MAKE SURE the cables you plug into 1/4 inch mains are TRS plugs, and not mono cables (TS). The main output 1/4 inch jacks are TRS balanced outputs and if you plug mono (TS) cables that shorts out the ring connector reducing the power by 6 Db. USE ONLY TRS balanced cables for interconnects !!!! Also read my tip on Fixya regarding PMP mixers. If you use 1/4 inch SPEAKER cables or adapters, if you short the SLEEVE of channel A output to ground you can pop the channel A amp. The TIP of channel B is the hot BUT the SLEEVE of channel A is the HOT. The ttip I posted explains why this is and it isn't mention in the Behringer documentation.
You CANNOT power 4 total 4 ohm speakers from this unit without special configuration. The lowest you can go is 4 ohms per side, which would be one 4 ohm cabinet per side. You would have to do a series parallel arrangement with the resources you have... two Peavey's in series and that combination in parallel with two 15's in series...
This is a VERY unsafe configuration with this mixer. ALSO please read my tip on here in regard to PMP mixer grounding hazard of the A channel when using Speakon to 1/4 inch cables.
Frankly, forget about maximum performance unless you want to risk blowing your mixer...
If I were you, I would put the two 15's in SERIES as 8 ohms on one of the channels and the Peavey's in SERIES as 8 ohms on the other channel.
You would be well to heed this warning as I have repaired a bunch of these units. Be careful of any poor speaker connections as there is an insulation breakdown problem in the power amp circuit board if a speaker becomes intermittent. If something fails DO NOT replace the pwer fuse as you will do more damage.
1) can happen if the speaker is dying - voice coil defective or magnet needs recharging. happens sometimes with low quality speakers.
2) faulty pre-amp section can reduce overall gain resulting in lower output volume. 3) for old amps dry solders in pre-amp & power amp section can have the same effect. 4) faulty coupling and filter capacitors can severely effect frequency response too.
Your setup sounds great. I had to settle for Blaupunkt in my Mercedes.
It sounds like the culprit is your enclosure. It's possible that by tweaking the settings, you could improve the sound somewhat, but having been used to the sound of a sealed enclosure, maybe not. Sealed enclosures tend to produce tighter, more accurate bass and have a flatter frequency response curve. They are also generally the enclosure of choice when looking for a SQ (sound quality) oriented setup.
Ported enclosures will produce louder bass than sealed enclosures, and maybe that's why some audio guys push them. They also allow the speaker to operate more efficiently, so you need less amp power for a given volume. Higher tuning on a ported box will get louder, but at the expense of sound quality. Lower tuning will still get louder than a sealed box, and the sound quality will be better than a box tuned higher, but still not as good as sealed. That's what I meant about tweaking the settings. You may see some improvement by setting the crossover lower, decreasing bass boost, or by turning the subsonic filter on/off. I'm no audiophile, but personally I've never been able to stand the sound of a ported enclosure, however it was tuned. Sealed just sounds better.
sounds like you may have a phasing problem with the 4 speakers connected in series. This has the effect of cancelling the bass out. Check that you have them all wired as say "stripe" to negative terminal on the speaker. I use this as a rule of thumb to be sure there are never any phasing problems. they all(speaker boxes) need to be facing the same way for bass to propagate well. Check that you have bridging OFF and all settings to "stereo" SAny other settings you are not sure on, just ask me here :)