SWR mod completed. Nice.

[paul_5]

Just done the 'Aural Enhancer' mod on my SM400 and it's (not surprisingly) a very different beast. It's a lot darker and louder - both plus points for me and the sort of stuff I play.

Took longer to take everything apart than it did to do the soldering bit.

[winterfire666]

cool, great amps those, ill be lookin forward to hearin it

[nugget]

I did that on my SWR Studio 220, it's amazing
Love the amp now

[BassBod]

Must look into this one...is that the Talkbass thread?

[paul_5]

yup, no extra parts needed, in fact, you end up with a spare capacitor - much like MFI furniture used to do...

[BassBod]

One of mine needs to go in for a hum check sometime...might try and get that added at the same time. And get the DI sorted for phantom power protection.

[paul_5]

After a 4 hour rehearsal today I can confirm that my SM400 is now über loud - last rehearsal it was pretty much maxed out to keep up with a drummer and 2 guitarists, today it didn't go above half.

[JPJ]

As a confirmed SWR nut, please enlighten me as to the source of this mod please

[paul_5]

It's dead simple; remove two capacitors and put one back in a different place...
The frequency response looks like this (before and after)
[URL=http://s1221.photobucket.com/user/paul_510/media/swrmod_zpsfda11699.jpg.html][IMG]http://i1221.photobucket.com/albums/dd471/paul_510/swrmod_zpsfda11699.jpg[/IMG][/URL]

And this is how it looks in the real world.

Before:
[URL=http://s1221.photobucket.com/user/paul_510/media/DSC01182_zps39cef70d.jpg.html][IMG]http://i1221.photobucket.com/albums/dd471/paul_510/DSC01182_zps39cef70d.jpg[/IMG][/URL]

After:
[URL=http://s1221.photobucket.com/user/paul_510/media/DSC01184_zpsed05383d.jpg.html][IMG]http://i1221.photobucket.com/albums/dd471/paul_510/DSC01184_zpsed05383d.jpg[/IMG][/URL]

[color=#141414][font=verdana, geneva, lucida,]1. remove the 0.1 uF capacitor[/font][/color]
[color=#141414][font=verdana, geneva, lucida,]2. Use it to replace the 0.001 uF capacitor[/font][/color]

[Heathy]

I make no apologies if this is a stupid question as I know virtually nothing about electronics:

Before I get to work on my Studio 220, is this something that anyone could do, or are any tools required?

[DangerDan]

Sweet. Wish i knew enough about stuff to do this to my SM900.

[rmorris]

[quote name='Heathy' timestamp='1488039423' post='3245314']
I make no apologies if this is a stupid question as I know virtually nothing about electronics:

Before I get to work on my Studio 220, is this something that anyone could do, or are any tools required?
[/quote]

Soldering Iron (Medium size tip)
Solder (Should use Lead free solder but note you will need quite powerful soldering iron to make a good job of it)
Long Nose Pliers / Tweezers (so you can keep your pinkies away from the hot bits !)
Solder Wick Braid to clean up any solder splashes
Solder Pump would be handy to clear the holes but should be okay to use the solder wick for this

Be sure to get the joint hot enough to melt the solder and let it flow to avoid 'dry' joints

[Heathy]

Thanks. Probably best that I get a grown up to do it for me.

[Owen]

This makes me fancy picking up a cheap and cheerful 2nd hand SWR.