Question about Mixers Allen-Heath GL2400 Series 24 Channel Dual-Function Live Sound Mixer AH-GL2400-24

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I have a AH GL2400. We are hearing a high amount of hiss on Aux 2 channel. Aux 3 is also starting to get noisy. Could this be a internal issue or componet failure?

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First thing is to check your grounds and cables. The next thing is to put a different component on it and see if you still get the hiss. If both of these check out then you can start checking into the mixer itself. The channels do go bad.

Posted on Nov 23, 2014

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Why does my UREI 1620LE hiss on phono channels and aux 4 channel ?


are you using a phono pre on the phono channels?

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Inverter manuals


Model No Required below Model No AH-X18MEV Self diagnosis mode given

1. Indoor unit
(AH-X18MEV, AH-X18MEV-1, AH-X24MEV, AH-X24MEV-1)
To display the self-diagnosis, hold down the AUX button for over 5 seconds on the indoor unit when the indoor unit is not operating.
• The operation lamp (red), timer lamp (orange) and Super jet lamp lighter) flash to indicate the information of malfunction.
(Display of self-diagnosis result)
The operation lamp (red) and the Super jet lamp (green) flash in synchronization with the timer lamp (orange).
(AH-XP18MV, AH-XP18MV-1, AH-XP24MV, AH-XP24MV-1)
To display the self-diagnosis, hold down the AUX button for over 5 seconds on the indoor unit when the indoor unit is not operating.
• The POWER CONSUMPTION indicator indicates the information of malfunction by showing the main category error (number) and the sub-category
error (-number) alternately in 1-second intervals.
Example: Compressor high-temperature error
Remark
• If the power cord is unplugged or the circuit breaker is turned off, the self-diagnosis memory is lost.
AUX
Operation lamp(red)
Timer lamp(orange)
Super jet lamp(green)

Oct 12, 2013 | Sharp Heating & Cooling

1 Answer

It shuts off and blinks 11


AHX18MEV
4 - 12
[8] SELF-DIAGNOSIS FUNCTION
1. Indoor unit
(AH-X18MEV, AH-X18MEV-1, AH-X24MEV, AH-X24MEV-1)
To display the self-diagnosis, hold down the AUX button for over 5 seconds on the indoor unit when the indoor unit is not operating.
• The operation lamp (red), timer lamp (orange) and Super jet lamp lighter) flash to indicate the information of malfunction.
(Display of self-diagnosis result)
The operation lamp (red) and the Super jet lamp (green) flash in synchronization with the timer lamp (orange).
(AH-XP18MV, AH-XP18MV-1, AH-XP24MV, AH-XP24MV-1)
To display the self-diagnosis, hold down the AUX button for over 5 seconds on the indoor unit when the indoor unit is not operating.
• The POWER CONSUMPTION indicator indicates the information of malfunction by showing the main category error (number) and the sub-category
error (-number) alternately in 1-second intervals.
Example: Compressor high-temperature error
Remark

3. CHART
<INDOOR UNIT> ?:1-second ON / 1-second OFF
Problem
symptom
Outdoor
unit indication
(LED1)
Indoor unit Malfunction
No.
Content of diagnosis Check point Action
Lamp Main Sub Main Sub
Normal
condition
Normal
blinking
? ? ? ? ? Timer (Orange) 0 0 Normal
Operation (Red)
Super Jet (Green)
Indoor and
outdoor
units do not
operate.
1-time ? ? ? ? ? Timer (Orange) 1 0 Outdoor unit
thermistor
short-circuit
Heat exchanger
thermistor short
circuit error
(1) Measure the resistance
of the outdoor
unit
thermistors.
(1) Replace the outdoor
unit thermistor
assembly.
? Operation (Red)
Super Jet (Green)
? ? ? ? ? Timer (Orange) 1 Outdoor temperature
thermistor
short circuit error
(2) Check the lead wire
of the outdoor unit
thermistor for torn
sheath and shortcircuit.
(2) Replace the outdoor
unit thermistor
assembly.
? Operation (Red)
? Super Jet (Green)
? ? ? ? ? Timer (Orange) 2 Suction thermistor
short circuit
error
(3) No abnormality
found in above
inspections (1) and
(2).
(3) Replace the outdoor
unit control
PWB assembly.
? Operation (Red)
? Super Jet (Green)
? ? ? ? ? Timer (Orange) 3 2-way valve
thermistor short
circuit error
? Operation (Red)
? ? Super Jet (Green)
LED1
AU-X24MV, AU-X24MEV
AU-X18MV, AU-X18MEV
LED1

May 27, 2012 | Sharp Heating & Cooling

1 Answer

I got a rode classic II with avalon m5 mic pre. So when i crank up my mic pre to 60 n i can start listening some hissing from my monitor...or is it normal for a valve mic coz when after recorded with this...


The hiss is caused by your monitor system level and your preamp gain being so high. At high gain settings, a preamp is going to get noisy, and tube mics have a higher noise level to begin with.

If you can't hear it on your recordings, then it's not a problem.

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1 Answer

I have a A&H GL2400 - 32 ch.Console; How do i hook up (5) Effect units to the Console?


Is this for live sound? You can use your aux outputs as sends if you're not using them for monitors and return to spare channels. If any units are being used for only one channel, either run them in-line (use the effect unit's wet/dry settings) or use the channel's direct out and return to a spare channel.

If one effect is applied to several channels you could put those into a sub group, take that sub output to the unit and return the 100% wet mix to a spare channel.

Be careful not to send the return channels back to any auxiliaries you're using for effects.

Jun 18, 2011 | Allen & Heath Allen and Heath GL2400-32...

3 Answers

I have a Peavey 8600 amplifier. It sounds great but when only operating vocals, in order to get the highs of your voice just right, the speakers put off a large amount of white noise. While singing, you...


There is not enough info here to provide a complete answer, but let me give you some background:

There will always be some hiss. This is due to general amplification where a small amount of noise is amplified along with the general signal. In most cases, the signal is strong enough to overpower any noise that is present (vocals in your example). This noise should not be that noticable in normal cases. If there is an automatic gain control in the line, this could account for it as with "silent" times, the gain will automatically be increased potentially to the degree where the noise is noticable.

Barring that scenerio, if the input signal is too low, the overall gain necessary to produce reasonable volume at the speakers will also be such that the noise is noticable. In order to track this down, please provide details about the current setup including:

1) Microphone make and model being used
2) Input being used on the mixer
3) Gain level being used for the mic channel
4) Gain level being used at the master level.

Dan

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1 Answer

The internal fan has been making noise and now after 30 min or so we get a loud pop the a descending whine at deafening levels even with the board muted. I'm suspecting an internal supply issue in our...


Hey tifly415, did you ever fix this problem? My church has the same mixer and last night it did the same thing twice during a congregational meeting. No fan noise, but the meters all peg and we get this horrible descending squeal which gets louder as you pull the faders back in a moment of sheer terror and panic. Power it off and back on and it's ok for a while then it happens again. It's happened to me a few times during rehearsals in the past and it definitely is not mic feedback because no one was near the console or doing anything at the time. It seems to be totally random and unpredictable.

I, too, suspect a power supply problem, but it never seems to happen when my troubleshooting gear is nearby. The only thing unusual yesterday was that the mixer was left on almost all day, so it may have been warmer than usual.

Anyone else have the same problem, or better yet, know of a solution?

Nov 20, 2010 | Allen & Heath Allen and Heath GL2400-32...

1 Answer

I have a Peavey FX 16, im trying to hook up a monitor so my guitar player can only hear himself. Im running 2 amps for monitors, 3 of us work off of 1 amp for our monitors and we run him one his own amp....


Quick and dirty way is to turn up one of the AUX channels, say #1 on the Guitar player's inoput channel/strip. Have all other AUX #1 completely CCW so none of the others get mixed on the AUX.

Use a TRS cable from AUX1 output to the guitar players monitor amp.

NOTE. The signal to his amp will only be controlled by the AUX1 on his channel AND the AUX1 Master.

One normally uses the AUX outputs for monitor functions.

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2 Answers

Channel 2 crackles


Make sure your speaker wiring does not come close to the 12v power cable running for your amplifier. If your amplifier's 12v power cable runs on the drivers side of the vehicle, run your speaker cables on the passengers side and make sure your tweeters have a high pass filter to stop any pickup of engine sound (When you are driving you *WILL* notice it at high RPM. a HPF (High Pass Filter) will also stop those nasty hissing sounds on S's.

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Sound interuptions with Samsung S4253


My set started having sound issues recently. Every now and then, randomly, I get a split second, static sound. It sounds like an old record player when it skips. It happens on all channels HD and digital. Also happens when I'm watching a DVD. This leads me to think that it's not my cable box (Dish Network). I have a Bose 321 aux amp plugged in. I hear it through my aux speakers, as well as directly through the tv set. Not sure what to do. Is it possible my tv's amp is burning out? What could be causing this?

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