Hello, any advice would be gladly welcome.
I’m on an idiosyncratic upgrade path led by value in principle and as a waypoint I’ve just bought a brand new 300dr to upgrade my SN3 which I’m using momentarily as a pre. Fed in turn by a hicap Dr. All is plugged into a chord m6 and driving Focal Kanta 3’s via chord epic x. SN3 has driven these really well previous to the 300 upgrade. I connected the 300Dr up on Friday evening and gave them a few hours of moderate volume play, naturally gobsmacked by the sound. All good. Saturday morning, left them playing a low volume for a few hours and when I came back it was playing nasty bursts of static and the amp unit was really warm. I left it all day today then tried again and got only one channel playing. Again the amp got warm quickly but the fan hadn’t activated. I powered everything down and unplugged/plugged, powered up and I have both channels again.
I’ve contacted the dealer but won’t get a response til after the bank holiday. Any ideas what’s going on here? Should the amp run that warm at low volume? (SN3 never got that warm even after a good deal of effort) Am I safe to assume this performance isn’t to be expected?
Thanks and I promise I’m not competing for the longest newcomer post ever
Unplug the amp, and don’t turn it on until you’ve had it checked out. Without a firm diagnosis it’s possible that the amp has a fault which is causing it to dump DC current into the speakers which can destroy the drivers. That’s going to make for an expensive repair.
I recommend you turn all of your system off. Wait 2 minutes and then rewire the system with just your SN3 and the Hi-Cap in the system. If you have an inexpensive pair of back up speakers, use them to avoid any risk of damage to your main speakers. Double check your wiring paths. Consult the Naim owner’s manual for your equipment. Play the system without the NAP 300 being in the signal path to re-establish a baseline. It is possible that your Hi-Cap is introducing a problem that the 300 is simply passing along to your speakers. If you do want to try your NAP 300 again, make sure the power supply is separated from the amp chassis. If you have stacked your electronics, this may have contributed to the amp heating up. The most common wiring mistake customers make with a NAP 300 is to get the channels wrong on the 4 PIN DIN > XLR interconnects, but you would not have heard any output from the amp in this scenario. The use of Chord Company speaker cables should not stress a Naim amp, but you should check that none of your cable’s interior conductors are exposed. The jackets on your cables should be unbroken. Finally, I do recommend you speak to your dealer. This is, as was pointed out above, highly unusual for a Naim NAP 300 amp. Good luck,
Thanks for the detailed advice. All connections are correct, the speaker cables are 6 months old and in excellent condition. The hicap was running perfectly fine through the supernait when isolated from the power amp as well. Everything seems to be operating normally now although the amp still gets warm after a short amount of play. I’ll speak to the dealer on Tuesday and see what they suggest. Naturally I’m nervous about holding onto a rather expensive product that appears to have failed out of the box. Thanks to everyone for their helpful words of advice.
I had a similar issue with my first 300DR. But Channel 1 failed after 30 minutes! Couldn’t believe it was the Naim equipment and assumed I was the problem in not connecting it all up correctly. So unplugged it, decabled everything and left for an hour. I recabled it (correctly as per Naim diagrams) and re-plugged it but alas, same problem. Used a knackered pair of linn nexus to try it with volume cranked up): nasty static like sound channel 1 still. Really disappointed. But contacted Naim who told me to send it back to them as undoubtedly a stuck relay! Also Phoned Pete at the brilliant Acoustica Chester. I took it back in and they exchanged it for new factory delivered Naim 300DR that had just come in that morning! Fantastic service. That one has gone back to Naim.
Interestingly, one of the burndy leads in the brand new sealed box was the wrong type. (2 green bands not just the one) No wonder I couldn’t get it to fit! Someone at the factory must have accidentally put it in! So Pete came from Chester with the correct one and fitted it for me. Again, incredible service. All works beautifully now. (Upgraded from the enigmatic 250DR which I loved. What a difference in sound presentation though. Very happy ).
Having had my SN3, NDX2 and 300 all fail and need repair in the last 3 months (as well as my hiline- but I understand that’s par for the course) I might tend to agree. I assume my situation falls outside of the normal range and am very unlucky, statistically speaking. That said, I accept that things go wrong and measure quality by the standard of care as well as reliability of product, in that regard they’ve been great. I genuinely hope my spell of misfortune is behind me and I can now anticipate a better experience for a very long time. Having to pay the dealer £20 for shipping on every occasion does feel a bit cheap given the cost of the product though.