iFixit - Answers With Device "Allen and Heath Mixer"

AH ZED-10FX: FX Loop Creating Excessive Noise

Sat, 17 Jun 2023 13:39:45 -0700

The mixer works great, except for if I have any of the FX on. It appears the FX board is creating static or other crackling, even when the volumes of all FX are turned off. I've yet to open the case and test the effects board.

Any advice regarding troubleshooting? I'm not sure if there's a replacement board for this unit, but that may be where I end up.

⟐ Answered June 17, 2023 at 13:39 MST

QU-32: No sound at all the outputs of Qu-32 audio mixer

Sat, 01 Feb 2025 07:35:27 -0700

My Allen and Heath Qu-32 audio mixer had all of its outputs abruptly ceased producing sound. On the meters, input signals could be observed, but there was no sound coming from the outputs. How can I fix this issue?

⟐ Answered February 01, 2025 at 7:35 MST

Allen-Heath GL4 Audio Mixer: Audio mixer not enough phantom power current?

Thu, 20 Nov 2025 02:31:08 -0700

When I plug in several dynamic and condenser microphones into my 32-channel 1995 Allen & Heath GL4 mixer, a specific large diaphragm condenser (LDC) microphone drops out and turns into white noise.

The mic in question works fine on modern audio interfaces
The only solution is to replace it with an small diaphragm condenser (SDC), and I was able to continue my drum recording session.

The particular LDC mic will work on the AH mixer only if it's the only microphone being powered, regardless of which channel the LDC mic is attached. However, when other channels are powered, even without mics attached in the other channels, the prior LDC drops out into white noise.

The Power Supply Unit has been recapped, about 4 large capacitor and 1 medium capacitor, and 2 smaller ones. -- save for some very small capacitors that do not look like they are blown. The problem described was already noted even for the recapping.

Maybe someone has encountered this same problem and knows where to start looking with regards to this mixer?

⟐ Answer edited November 20, 2025 at 2:31 MST

QU-32: Why is my console is not turning on

Sat, 01 Feb 2025 07:36:24 -0700

my console is not turing on. when i try to switch it on its just shows QU -32 And Allen & Heath branding. no keys are working its frenzied

⟐ Answered February 01, 2025 at 7:36 MST

AH ZED-10FX: Exeses noise in live sound system

Thu, 27 Jun 2024 02:27:22 -0700

Exeses noise