Axiom Home Page Forums General Discussion Technical Questions No Power, Axiom EP500 v2 sub woofer

There is two small fuses in the pull out box under the switch. To the left of the switch is four fuses. The bottom fuse is the ceramic fuse and the three above the ceramic fuses are smaller fuses. I had the ceramic fuse tested and it was OK. I looked at the other fuses and did not see any burned spots on the glass fuse capsule. I may replace them anyway and see if it corrects the problem. If it is not the fuses what else could it be?

Stoner,

Check the "TRIM" control and make sure that it is NOT set to "Load" or "Remote". Set "FLAT".

Don't use a surge protector with the EP500. Plug the subwoofer into a wall AC outlet. First unplug it, wait a few minutes, then plug it into the AC outlet and try again.

Visual inspection of the fuses is not adequate. You need to have the Radio Shack guy check each fuse with a volt/ohmmeter.

Regards,

Alan

Hi John,

Your EP500s are the latest versions, which have only the two fuses in the pull-out module below the AC switch. Older EP500s also have four additional fuses in holders.

The diagrams on our web site for the new EP500 Owner's Manual need to be updated to show the new back plate.

Regards,
Alan

Stoner,

I just chatted with Chris, who builds our EP500 amplifiers and repairs them. He said it's very rare for the ceramic fuse to blow.

Call our Audio Experts on the toll-free line and we'll have new fuses sent out to you. Throw out the old ones and replace them, then try the EP500 again, after you've checked the Trim switch, which should be at Flat.

Regards,
Alan

Is there a specific reason why a surge protector shouldn't be used with the EP500 Alan? I don't really want mine to go up in smoke if I get a power surge.

Thanks
Cam

I beleive the reason, is in theory, the surge protector could be limiting the power to the amp.

Stoner,

You sure you're vision isn't impaired from a "foggy room" or glossy eyes thence not being able to see the power light illuminated on the back of the 500??

Thanks, Alan.
On a side note, past weekend, one of my EP500s developed some popping sounds (as if someone was randomly tapping the driver cone in singlets or doublets). Popping was present irrespective of whether the LFE line was connected. The popping then went away but the status light in the back turned yellow, and the sub became non-functional. I e-mailed Axiom on Sunday evening, and Brent replied back that night ! (Amazing customer service). After trying a few things that he suggested, there was no change. He will be sending a new amplifier today. Needless to say, I am grateful for the outstanding technical support and the exemplary customer service from Axiom.

Hi Cam,

Jay is correct. We'd prefer that customers not use any intervening devices between the subwoofer and the AC outlet, especially if there are any problems showing up. This is also true of Axiom's A1400-8 power amplifier.

Look, it isn't a big deal if your EP500 is working fine while it's plugged into your surge protector. However, whenever we have problems, I usually advise a customer to directly connect the subwoofer or amplifier to the AC wall outlet, to rule out problems in the surge protector.

Regards,

Thanks Alan,

Maybe they use of quite a long extension cord to my surge protector is limiting my bass output? I will try unplugging it and see if there is a difference.