Question about Harbinger APS 15 Powered PA Speaker

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It sound like the speaker blats at certain freqs

At low and high volume the speaker sounds like a clip type noise but no clip lights or peaks are lite. The speakers are set up left and right and have switched the imput after the noise, and the same speaker does it again. It's not frequent but enouhg to be a terrible distraction.

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Posted on Jan 02, 2017

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SOURCE: hooking up the speaker to

You should NOT under any circumstances connect an audio input lead to a speaker output jack!
The RCA jacks you are trying to take output from ore "pre fader" which would be solid "line level" and not controlled by volume controls. Tap off the INPUT to the amp... you should be using balanced lines for the interconnects. RCA jacks are unbalanced lines. You can drive several inputs from a line level output of a mixer for example using a splitter cable.

Posted on Aug 23, 2011

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SOURCE: I have the Harbinger HA120

You need to do some test on the equipment. First check the resistance of each speaker. You may have a bad cable... and yes you can destroy the speakers with too loud a signal... HOWEVER if the system is made to work together this is USUALLY not a problem.

Posted on Aug 26, 2011

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1 Answer

Something blew during a loud performance and now it produces continual high-freq feedback that can't be controlled.


The speaker may be blown, but if you're getting continual Hi-freq feedback that is not resolved by lowering the volume know, you need to take this to the repair shop.

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My peavy escort 1500 keeps shutting off but will come back on if I turn it off and on is it a fuse?


Can't be fuses, as it comes back on!

Questions:-
i) Does it go off when run continuously with volume controls at zero?
(this checks whether the audio output level is causing a problem).

ii) When the unit does operate, is the sound good on both speakers?

iii) Does the fault occur more when outdoors (wind noise tripping the power protection). If so, reduce the low freq EQ setting.

iii) Do the EQ lights flutter when the fault occurs?

This fault has been reported on the Escort 3000 too, see link
Peavey Escort 3000 sound cutting out - Peavey Forum
suggesting this may need a 'electronic modification' to put it right.

Hope this helps.

Dec 30, 2014 | Music

1 Answer

Woofer rattles at low volume...when i turn it up it sounds pretty good...still has bass and highs


May be a couple of things; The first is a resonance in the cabinet, which may not be noticeable at high volumes. If the speaker cabinet was ever dropped,or got cracked from dropping , dry weather,or whatever, there may be certain frequencies that make the cabinet rattle. Try holding the cabinet when it rattles and look for anything loose,from a side wall to a loose foot, or the speaker itself. Tighten up loose items and seal any gaps or cracks On the cabinet.
The other problem could be a partially blown speaker. Test by lightly pushing in on the outsides of the speaker to see if it moves in and out freely. If there is a scratching sound, or it drags slightly , it might be blown. Also,the dust cap or another part of the speaker may be loose. Check that, and reseal if loose. Replace or have reconed if blown.

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1 Answer

My crossover on Behringer speaker cab ba-115 (15" bass driver plus tweeter) is bad. Does anyone have the schematic before I tear it apart?


There is very little to an inspeaker crossover that could go bad unless it was SEVERELY overdriven. I recommend checking the speaker individually on a wire from a stereo or something powered to verify this. A crossover is nothing more than a capacitor (high cutoff) and an inductor.(low cutoff). The 600 watts rating of the cabinet is an RMS rating, meaning, .707 actual peak value free of distortion. This means that you can only drive it about 71% of that without distorting or damaging it. You said, "very little signal gets to the speaker", which sounds like "very low volume" meaning, magnet stuck, speaker not moving much, meaning warped voice coil. Check that the speaker will move back and forth with your hand freely without interference or scratchy noise. If it doesn't, the voice coil is warped and the speaker needs to be reconed or replaced.

Mar 12, 2013 | Music

2 Answers

My JBL PRX 635 Speakers at all event shuts off during high volume ( No Red Light ) Very Embarrassing during the dance is packed. Volume is always set at one single yellow peak from the mixer and just...


Sounds like you're over driving them. First check to make sure they're on "line level" not mic. Shutting off is amp(s) in speakers going into "thermal shutdown" IE: overheating. According to your description level settings look good - check to make sure speakers are on LINE LEVEL

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1 Answer

I have 1604-Vlz3, M-audio Delta 1010LT With Cubase 5 . There is a main problem when it's normal with an apm it's no problem no sound problem but when the direct out is working with the sound card the...


You MAY be overdriving the sound card. Near flat should work for vocal, but setting the levels throughout the mixer is important as well as the sound card. You can use the LOW CUT to reduce hum if you have noisy system. Describing balancing the levels is more than I can do here. There are many good videos about mixer setup on YouTube.com. You cannot "fix" problems created by improper levels and noise injected into the system using the EQ.
What is important is to see that all gain controls and faders are around mid range to 70% when operating normally. You should be using BALANCED lines everywhere possible either XLR or TRS cables. ALL interconnected equipment should be powered from the same receptacle or power source INCLUDING all amps and powered speakers. Often users use unbalanced lines from mixers to sound boards and pick up noise or they have the levels set wrong between the mixer and sound board resulting in clipping and distortion or poor signal-to-noise ratio.

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1 Answer

No sound in horn when plugged in bi amp connection


The question is whether or not you get any sound from the horn when in full-range. If so, then either the input jack for the horn is defective, or you are not passing the signal. A quick check would be to send the full-range signal (at low volume) to the high-freq input. You should hear the horn work. If not then the connector is defective on the crossover board.

If you get no sound from the horn in any configuration, then the coil is blown for the horn. This can be replaced. It is usually a 22a or 22ti diaphram

Let us know what you find.

Dan

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1 Answer

My Korg c15s has a lot of grating staticky noises when played ....I'm told it cannot be repaired as Korg no longer makes parts for this model?


I have a Korg C-15s and also experiencing loud crackling sounds when I turn it on. The problems seems to be either the sliding volume control or the amplifier itself. Honestly though, I believe the issue is the volume control. I opened my piano to get a closer look and attempted to clean the contacts on the volume. Unfortunately after cleaning the contacts, the crackling sounds became somewhat worse. After I turn the piano on, the volume control is generally rendered useless......volume set to low volume and the noise is quite loud and other times the volume control is set high and get very low volume crackling noise. No real consistency. The noise does diminish after a few minutes but so does the piano sounds to an inaudible level. There were a couple of instances where I turned it on and surprising enough, no no noise and perfect sound. For these reasons I believe the issue is within the volume control and not so much the amplifier. I have an electronics background and noticed that the volume control is very unique in design and is not something that can be substituted with another volume control from other sources.

My recommendation is to check the sound quality of the audio from the RCA L/R audio outs on rear of the piano by connecting to a stereo receiver. If it sounds fine you're in luck. If the crackling sound does not diminish after a few minutes like mine does, I would suggest disconnecting the internal speakers and using the audio out only. You can connect a pair of studio monitors or high quality computer speakers, preferably with a small subwoofer to deliver the full audio range and deeper tone of a real piano. I'm currently using a basic pair of Logitech computer speakers and is quite acceptable until I can afford a high quality set of monitors or relocate my piano closer to my high quality Yamaha receiver.

I hope this info helps a bit.

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1 Answer

My speakers sound is terrible now. I changed the


Forst thing is to put a known signal into the speakers, say from a CD recorder to isolate a possible mixer or other source being marginal.

If the sound is still bad, verify that your volume settings are reasonable.

DO NOT crank the gain on these speakers full and then throttle the signal to them as that cause poor signal-to-noise ratio.

If you have driven these speakers very hard (these are only INTENDED for lower level monitoring within the engineer's booth), you MAY have damaged the speakers. It htat case, repair will be necessary.

Try to determine if the lows or highs or both are bad sounding.

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1 Answer

I'm using the ub2442fx but not getting enough volume


The unit should generate standard levels which then must be amplified. It LIKELY is doing that.

I suspect your amplifiers and/or speakers are insufficient. You have not told us the speakers you have or the size of the venue. The type of sound you are making is important too, as heavy bass requires BIG speakers... at least 15 inches for good reproduction.

I also would recommend you get an audio sound level meter... even an inexpensive Radio Shack one will do. This will allow you to comply with the sound level restrictions and compare speaker/amplifier sets.

If you can get to 90 Db, that is safe level.

Many venues they have massive amplifiers for say a 4000 sq ft area that have 1000 watts. This doesn't guarantee adequate sound since the efficiency of the speakers play a vast part. For good bass, the speaker cabinets need adequate physical size to match the speakers to be efficient.

A word of warning: If you have an ampliifier that generates much more than the rating of the speaker, expect to blow some speakers. Also DON'T be fooled by "peak power" ratings as they are fake, count on RMS power ratings when comparing.

Feb 05, 2010 | Behringer Music

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