Why would you want to?

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Originally posted by ******** Seplling don't demonstrate intelligence and educatoin - knowing does.

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Originally posted by Clovis Why would you want to?

I've always had a grudge about the LF settings

um, new resistors and some solder?

seriously, a&h mixers are all analogue so if you really want to do that your gonna have to start fucking around with the pcbs.

Taking a stab in the dark here, but i reckon it doesnt bother you that much

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I would presume the filters would be of a fairly high order in order to get a good roll-off. It'd probably be a bit more difficult than you think.

But yeah, since they're all analog(ue), you'd have to change the circuits themselves, and all in a consistent manner across the channels.

I wonder if schematics of various mixers are available?

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Originally posted by AnomalyConcept I would presume the filters would be of a fairly high order in order to get a good roll-off. It'd probably be a bit more difficult than you think. But yeah, since they're all analog(ue), you'd have to change the circuits themselves, and all in a consistent manner across the channels. I wonder if schematics of various mixers are available?

I think he's referring to the EQ rather than the filters. But I doubt there'd be schematics freely available...trade secrets, anyone?

And like everyone have already mentioned, the Xone series are analogue so you'll have to do a lot of reverse engineering and soldering/rewiring at the PCB level.

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Meh, couldn't be arsed to do that

Was thinking it was possible to somehow edit the 3D's firmware to change EQ settings other than the whole soldering thing.

As far as I know, the ONLY mixers where you can change the frequencies of the EQ's are:

ECLER EVO5: You can do this on the fly via the settings menu on the screen.

Denon DNX1500: I beleive this can be changed via the firmware or setup menu.

Tascam X-9: Each EQ pot has its own sub-knob, to change the frequency range.

Other than that, its pretty impossible to change on a normal, analog mixer.

The only thing I'd change on the Xone is its incredibly sharp curves. The filters I don't mind, but the curves on the faders and EQs are massively sharp. It's not worth all of that trouble, though, as you get used to it after a while.

Last time I talked to A&H techs schematics were available as part of the mixer service manual. This is standard procedure in the electronics industry. This may have changed since I talked with them some 5 years ago. Some companies consider schematics trade secrets, some don't. Some will also only release service manuals for current products to shops.

Probably the best thing to do is to find a good local electronics technician who understands audio hardware, unless you are handy with working on boards.

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Originally posted by SPAWNmaster I think he's referring to the EQ rather than the filters.

Filters are a pretty broad term, generally noting anything done to a system. An 3-band EQ divides the output signal into three chunks (low, mids, high) by cutting out bands of frequencies (filtering). The EQ knobs would control the gain for the respective parts, with the cut-off frequencies being fixed.

The filters in the filter section differ in that the frequency parameter can be varied, and the type of filter can be changed (lowpass, highpass, bandpass, etc.)

Edit: according to the AH website, manuals can be ordered from distributors, but they don't have the xone series listed there. On the dedicated xone website, they only have block diagrams, which is useful to see how the circuits are set up. I was unable to find the service manuals after a few minutes of looking.