AV2 sub and center channel dead?

Dear forum members

My beloved AV2 is acting up lately - it stopped outputting any signals via sub/center channel (contraire to the last nine years). The main channels have no problem. No rears as I'm running it in a 3.1 configuration. What I have tried so far:

- n-SUB and n-CENT work properly (tested)

- all cables work properly (tested)

- Reset according to manual, reentering the speaker information: no test tone output via sub and center

- Hard power down, leaving it unplugged overnight - no luck

- Searched this forum, similar problems seem to predate the current firmware

Naim AV2 Firmware:
AVC0107 (naim PIC revision)
F658 (control DSP revision)

Maybe you guys have a hint or two for me how to bring my AV2 back to order - thank you! Richard, you even mentioned in one thread in 2013 that [..] I'll try to dig out my old AV2 troubleshooting documents and see if there's anything there to help [..] - I'm hoping for it

I already talked to my dealer and he is working on it - I just thought I give the universal wisdom of this great forum a try...

Best regards

Original Post

Hi, I've an AV2 too but am no expert on the configuration. Could it be that your source (tv / computer / dvd player etc ... ) got an update and is sending a signal which cannot be digested by the AV2? I remember that I did send a DTS HD signal, and it gave stereo instead since it does not understand DTS HD.

I'm happy with my AV2: use it with a Nait 5 for AV purposes.

Ardbeg10y posted:

Hi, I've an AV2 too but am no expert on the configuration. Could it be that your source (tv / computer / dvd player etc ... ) got an update and is sending a signal which cannot be digested by the AV2? I remember that I did send a DTS HD signal, and it gave stereo instead since it does not understand DTS HD.

Surely in that case the test tones would still work?

Ardbeg10y posted:

Hi, I've an AV2 too but am no expert on the configuration. Could it be that your source (tv / computer / dvd player etc ... ) got an update and is sending a signal which cannot be digested by the AV2? I remember that I did send a DTS HD signal, and it gave stereo instead since it does not understand DTS HD.

Two things speak against it: The AV2 shows the used sound format correctly on its front display; and as Eloise mentioned the AV2 behaves like that in the initial setup when turning test tones on and switching through the configured speakers (left - center - right - sub).

Richard - no problem. I configured VI1 and VI2 as multichannel input and fed an analogue signal to the appropriate channels. Though it was no multichannel source, the signal was audible when feeding it via multi-cinch to DIN cable to the front left and right channel. Changing the cinch connector (at the source end) for the sub/centre channel on the AV2, the signal was gone.

Another bit that I noticed when testing the unit was that when I added the centre speaker to the configuration, the output level of the main speaker (SBLs) were immediately adjusted to a slightly lower level and vice versa.

I brought the AV2 to my dealer this morning - still, I will happily forward any suggestion you might have.

I find hard to believe that electronic components are hard to get hold of anymore. Anyway, i have an AV2 and (touch wood) it's still works fine. If you do replace it it would be interesting to know what you would replace it with.

Well, the AV2 has been discontinued in 2010 and I am wondering how many Naim has sold overall. So there are probably not much incentives for Naim to keep replacement parts around. I could still buy a preloved one for EUR 800 to 1'000. But as it stands right now I will audition an Linn Majik DSM/3 to reduce box count, to have HDMI inputs, to use Space Optimization and to go Exakt eventually (which itself is very tempting). The Majik only understands (Multi-channel) PCM, so the decoding needs to be done by the sources. So, to be fair, not a full replacement for the AV2...

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