Meridian Unplugged - Powered by MrTechGuy.co.uk Forums Thread Like Summary - No sound from centre speaker

Hi, I would appreciate some advice if possible please…

I recently purchased a 568.2 and a DSP33C.

The DSP33 works when fed directly.

I hooked it up to my 5200’s which work fine, but when I added the DSP33C as master in Trifield mode, the comms work but there is no sound from the centre.

I’m not sure if missed something but I would like to know if there is a simple way to check that the centre channel on the 568.2 is working.

Many thanks

Steve,

You'll want to do a level calibration and time alignment of the speakers now that you've added a working center to the system.

Anything with a higher channel width than 2.0/2.1 is considered a "Surround" configuration not just in Meridian terms but also more generally as far as calibration criteria for optimized playback.

Read the section of the manual in the 568 that discusses speaker calibration. It's critical you measure and set the exact distances for all 3 speakers in the 568 in ft and inches for time alignment which allows the sound of all 3 speakers to reach your ears simultaneously. For gain trim (level calibration) you will need a basic SPL meter, with a slow/C weighting to adjust the levels of each speaker so that they read the same exact SPL when playing the test pink noise in your listening position.

In the consumer realm, 75dB/C is generally the agreed upon reference level to calibrate all 3 (in your case) of your speakers to. So with the SPL meter, adjust the gain trim for all 3 channels until they read as 75db on the meter with pink noise playing. Once you've done that, you're all set and now have a calibrated playback system. You shouldn't find the center channel to be significantly louder at all or much more prominent unless the content you are playing is mixed that way or you are using a DSP preset that is center heavy depending on how it's configured and the content.

Good luck.

I've had an M cable "fail" on me once or twice. If you're handy with a soldering iron, you might find that the inner signal core has become detached from the centre pin. If you unscrew the RCA cover at one end or the other (or both!), it can be resoldered to revive the cable.

After buying 2 more cables it seems that Trifield works fine with other sources. The problem I had was resolved by using a different DSP preset (music I think) with that source.

Thanks again for your advice, I will be tweaking it soon, but I’m just enjoying having things working again for now! It Sounds great already and will be awesome when calibrated.

I want to replace the centre with 5000HC/5200HC or even 5500HC if I can get one locally 🙂

The sub is also working.