Thanks so much for reading my post. I’m working with a super sweet client system comprised of everything pictured from my attached handy diagram, and experiencing issues with the sound quality. I’ve recently searched for hours on this forum and others, and cannot find a similar situation to use for troubleshooting.
System is comprised of a NAC 82 Preamp, NA CDX CD Player, Two HI-CAP power units, One SNAXO 3-6N active crossover, three NA 250 stereo amplifiers, finally feeding to two NA NBL tri-amp loudspeakers. All official and correct NAIM cables types within.
This system was designed and is connected in the proper “TRI-AMP” operation, using the “O/P 2” connections on the SNAXO 3-6N to each individual amplifier.
Unfortunately in this configuration, the sound quality is simply strange and awful.
• The bass is barely there, very little impact, and sounds tinny.
• The mids are overpowering, very flat/bland, and feel like a piece of cardboard is in front of them. Almost uncomfortable to listen to.
• The highs are barely there, sound very tinny, grating, and sharp. Uncomfortable to listen to.
Now if I simplify the system to just 2-ch stereo, by removing SNAXO 3-6N active crossover, and using either HI-CAP to feed the preamp, I am able to get the most glorious and spatial quality stereo only sound out of one amplifier at a time to a pair of regular speakers!
All three amps seem to work just fine. However one of the HI-CAP’s does have a very loud buzzing effect however when used in this configuration, even at idle, but it does work.
Looking for any thoughts/help/assistance here please to resolve. I do not have any service history on this system, and some of the levels (blue POTS) were adjusted from factory in the SNAXO. I adjusted them back to factory black-marker specs, but they only increased or deceased the poor sound quality that is output to the speakers per frequency range with additional testing.
Thank you for reading.