Nad 304 Protection Mode

sirhenry · 13th May 2009, 01:30 PM

Just picked up a NAD 304 and connected to B&W DM601 series 2 speakers (bi-wired). Sounds great until I turn up the volume. With the volume control at about 10 o clock the red light comes on and sound goes off. Is there anything I can do to fix this or do I have a compatibility issue with the speakers? I believe these are rated at 4ohms.

Hope someone can help.

jaycee · 13th May 2009, 02:00 PM

The 304 is a bit of an oddball... it looks like a Class G amp to me!

This could be a protection circuit fault but it could also indicate something's wrong with the power switching circuitry. Without testing it's impossible to know which.

bekim · 14th May 2009, 09:46 AM

Hi

B&W 601 S2 are 8 ohm speakers. Even though, that cannot be problem with this issue. I had same problem few years before with one 304 and I think was problem to put new power supply caps, the big ones. U can check does amp has any bad solder joints and idle voltage with service manual.

Nice amp, 35Watts per channel.

13th May 2009, 01:30 PM	#1
sirhenry diyAudio Member Join Date: May 2009	Nad 304 Protection Mode Just picked up a NAD 304 and connected to B&W DM601 series 2 speakers (bi-wired). Sounds great until I turn up the volume. With the volume control at about 10 o clock the red light comes on and sound goes off. Is there anything I can do to fix this or do I have a compatibility issue with the speakers? I believe these are rated at 4ohms. Hope someone can help.

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13th May 2009, 02:00 PM	#2
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	The 304 is a bit of an oddball... it looks like a Class G amp to me! This could be a protection circuit fault but it could also indicate something's wrong with the power switching circuitry. Without testing it's impossible to know which.

14th May 2009, 09:46 AM	#3
bekim diyAudio Member Join Date: Jul 2004 Location: Prishtina, Kosova	Hi B&W 601 S2 are 8 ohm speakers. Even though, that cannot be problem with this issue. I had same problem few years before with one 304 and I think was problem to put new power supply caps, the big ones. U can check does amp has any bad solder joints and idle voltage with service manual. Nice amp, 35Watts per channel.

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