I'm not Sheldon, but I've got a combustion. Sheldon correct me if I'm wrong. front to back: Neck PU, Bridge PU, Bass Boost/cut, Treble boost/cut As for the output, I'm no sound guy, but if your not satisfied with your output, you can get FD-3 PU's for your combustion (see the store), or there is a B-string signal boost kit you can get from sheldon. Welcome to the forum! Nice bass, isnt' it?

[quote="TheGrandEnigma":3nteignh]I'm not Sheldon, but I've got a combustion. Sheldon correct me if I'm wrong. front to back: Neck PU, Bridge PU, Bass Boost/cut, Treble boost/cut As for the output, I'm no sound guy, but if your not satisfied with your output, you can get FD-3 PU's for your combustion (see the store), or there is a B-string signal boost kit you can get from sheldon. Welcome to the forum! Nice bass, isnt' it? [/quote:3nteignh] thanks for responding, i think i may have not put the question acrros correct. i would like to know what the swithches on the circuit board on the EQ do and in which postion. and also the low output, seems a bit odd that my borthers 70's les paul custom had a higher output. and oh yeah combustion basses are just amazing, love the neck and the fanned frets. cant see myslef playing anything othere then Sheldons basses for a long time. just got to get the money now for an ABZ. Vic

Oh, oops! Welcome none-the-less! Well I'm a believer in Sheldon's basses too. I have the of living in Saskatoon, so I've met and talked with Sheldon. He is a smart man - he knows his stuff. And great to deal with too! I'm waiting for something with 6 strings. I'm saving my pennies!

Those switches control the treble knee frequency. The factory setting is the lowest and IMO most useful. The three other switch positions move things higher. If you would like a pdf sent to you of the frequencies send an email to tech@(your favorite bass company's name here).com

Hi just wondering if anyone has tried a different pre-amp in their combustion? And also Sheldon did you experiment with different pre-amps and your thoughts? thanks Brian

Blong, if you don't mind, I'd like to add if anyone has tried the other pickup options. That's something I'd like to hear as well as pre-amps.

We had the EMG pre-amp in mind right from the start. It's a great little pre-amp. What is it not doing that you'd like?

I haven't received my combustion yet, I was just curious if anyone did that mod yet. The combustion I tried sounded great, I like more of a vintage tone anyway.

A quick search on EMG's web site comes up with datasheets for EMG's "BTS Control" on this page [url:om07mtk6]http://www.emgpickups.com/products/index/140/146/4[/url:om07mtk6], where I found more information than I could shake a stick at (including "[color=#FF0000:om07mtk6]Powering your instrument with more than 9-Volts will not make it louder[/color:om07mtk6]" which I did wonder about) but if your interest is more than just curiosity, check with M. Dingwall before doing anything since custom mods to preamps are not unknown in Saskatoon