SWR Help

That doesn't sound right...the SM-400S puts out 500 watts @ 4 ohms rms...

 

a) Make sure the idiots you took it to fix it right this time.
b) Don't go back.

Mike

 

My 350X puts out 350 watts RMS

 

it's 500 watts rms bridged into a 4 ohm load. maybe they are only testing one side of the amp...

 

I'm not qualified to verify manufacturer's claims, so i'll stick with what I know. Don't listen to what's being said....listen to your amp. You've noticed a drop in output? You're probably right.

Mike

 

I'm not that familiar with the SM-400, but does it have a line (mains) voltage switch on the back? If so, is it set to the correct voltage?

If there's an effects blend knob, is it set to dry?

Have you tried a short cord to jumper the effects loop?

If you're using it bridged, are you connecting the speaker cable properly?

Does it have a tube and if so, is the tube known to be good?

Is there a mute button that could be depressed or a failed switch that could be in the permanent mute mode?

Did you try a different power cable?

Are the fuses all good (inside and out)?

Has the amp been dropped, left out in the cold, get wet, etc.?

 

Could you do a couple of things to help narrow it down?

1 - Try running the amp in stereo and see if the problem affects both power amps.

2 - run a signal from the effects out to another amp and see if you get a clean, loud signal. An effects return on another amp would work well for this. This will take the preamp out of the equation.

The output is 500W RMS.

 

call SWR and explain this to them and see if u can ship it to them to get fixed. If not, take it to another amp shop, preferably someone more reputable.

 

There's a shocker.

 

I presume that you have a manual... If not, this one's available online

http://www.swrsound.com/support/manuals/html/sm400som.php

I wouldn't think that the power ratings are Peak.

If SWR wasn't much help, contact Steve Rabe at Raven Labs. He'll know for sure...and might have some better suggestions.

Make sure that the limiter is bypassed...

Do you still have the old tube? Did you try a different one?

Try plugging your bass into the effects return jack and see how loud the amp is then. Make sure you turn your bass' volume down before you turn the amp on.

Good luck and please keep us posted.

 

To put it gradiously, they're full of bunk. That amp should run about 250 a side at 4 ohms and 500 watts at 4 ohms bridged. Take it to a decent tech and have them check the solder joints at the controls where the board meets the faceplate. Also have them check the Effects input and output jacks on the back. Then take the receipts back to the first guy and get your money back.

 

Here's a link to the manual:

http://www.swrsound.com/support/manuals/html/sm400som.php

 

I just looked at the website info -

3rd paragraph, section called General Information and Description.

it says very clearly - 250 watts a side, bridged 550 watts @ 4 ohms

print it and take it.

http://swrsound.com/support/manuals/html/sm400som.php

rock on

 

Billy, just curious as to what these two suggestions might fix. I might have a similar issue and might want to try these two things.