Owen Posted April 26, 2015 Share Posted April 26, 2015 I have a pair of 40J soapbars with a BTC circuit. I am about to have them put them into a new bass but would like to have passive tone control in as well. I am aware that the treble control will give me an element of HF control, but I like what a passive roll off does (I had one on a set of EMGs with no active EQ) so fancy having one put in while I am at it. I am drilling a new body so now is the time to decide how it will all be cut open. Do I have to use an EMG pot? If so which one? Where does it go? So many ideas, so little ability to realise them Obviously I will not be doing anything with a soldering iron, they hurt me. Quote Link to comment Share on other sites More sharing options...
hubrad Posted April 26, 2015 Share Posted April 26, 2015 Yup, you can even install a kind of active passive switch, except in this case it would refer to the EQ. You need the usual 'passive' tone pot as per EMG, i.e. 25k with tone capacitor. Quote Link to comment Share on other sites More sharing options...
3below Posted April 26, 2015 Share Posted April 26, 2015 (edited) As far as I can ascertain the EMG 40J is an active set (website says they are J type in larger case) . I think you could achieve a passive tone control in addition to the BTC setup. It would need to be the 25K pot. I have one bass with EMG Js and find the passive 25K tone pot works remarkably well (usually I just run my basses with tone control at full but with with the EMG set-up I actually use the tone control). Now answered above while I was typing Edited April 26, 2015 by 3below Quote Link to comment Share on other sites More sharing options...
verb Posted April 26, 2015 Share Posted April 26, 2015 You can install a switch to allow active/passive EQ or have the passive tone pot working all the time. A passive tone control is a bleed off to earth,so is connected between the hot signal wire and earth. Quote Link to comment Share on other sites More sharing options...
Owen Posted April 26, 2015 Author Share Posted April 26, 2015 Thanks everyone. I love this place Quote Link to comment Share on other sites More sharing options...
Owen Posted April 28, 2015 Author Share Posted April 28, 2015 Sorry for being dozy. One of these? http://www.ebay.co.uk/itm/231543202368?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT Quote Link to comment Share on other sites More sharing options...
BassBod Posted April 28, 2015 Share Posted April 28, 2015 If you are using two pickups and a circuit, I'd be thinking of using two 9v batteries as well...just a thought. Quote Link to comment Share on other sites More sharing options...
Owen Posted April 28, 2015 Author Share Posted April 28, 2015 I have run the system I am using at 18V and must admit that I did not feel the benefit, but for space reasons I will be using the 2 x A23 12v trick Quote Link to comment Share on other sites More sharing options...
BassBod Posted April 28, 2015 Share Posted April 28, 2015 Interesting...I'm not that well informed on that one...mmmm. I've used the 18v with two J's and an Aguilar circuit and did hear a bit more oomph, but it wasn't a huge difference. I did see that they are now selling a pedal box so you can remotely power everything using a stereo cable. Looked like a low tech version of the Alembic Series idea, but without the mains connection. I'm tempted to try it in my Bravewood jazz, with JVx's and an Aguilar OPB1. Quote Link to comment Share on other sites More sharing options...
hubrad Posted April 28, 2015 Share Posted April 28, 2015 [quote name='owen' timestamp='1430209889' post='2758852'] Sorry for being dozy. One of these? [url="http://www.ebay.co.uk/itm/231543202368?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT"]http://www.ebay.co.u...K%3AMEBIDX%3AIT[/url] [/quote] That would work, but the long shaft might get in the way unless you use either a spacer or both nuts on the one shaft. The standard length one is thus: http://www.ebay.co.uk/itm/One-Genuine-USA-EMG-Short-Brass-Split-Shaft-25K-Volume-Tone-Potentiometer-Pot-/161595674719?pt=LH_DefaultDomain_15&hash=item259fda505f This one is the solderless version: http://www.ebay.co.uk/itm/EMG-25K-Tone-Pot-with-short-split-shaft-Cables-4-pin-Solderless/370724797133?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D30111%26meid%3D888d45c01a4442b6a657f79ac59557fa%26pid%3D100005%26rk%3D3%26rkt%3D3%26sd%3D321727835981&rt=nc and I just saw they now do a 25K with push-pull switch (ideal for the active-passive EQ): http://www.ebay.co.uk/itm/EMG-25K-Push-Pull-Pot-with-short-split-shaft-Cables-6-pin-Solderless-/371176804444?pt=LH_DefaultDomain_3&hash=item566bdc905c Running at a higher voltage doesn't so much raise the volume as the headroom. Just that bit clearer, especially if you play hard. Quote Link to comment Share on other sites More sharing options...
hubrad Posted April 28, 2015 Share Posted April 28, 2015 What manner of bass are you thinking of for this? It occurs to me that the standard shaft is spot on for plate mounting or a thinner top, while those longer shafts are probably ideal for more of a thicker range of tops. Quote Link to comment Share on other sites More sharing options...
Owen Posted April 28, 2015 Author Share Posted April 28, 2015 [quote name='BassBod' timestamp='1430212957' post='2758901'] Bravewood jazz [/quote] Mmmmmmmmmmmmm Quote Link to comment Share on other sites More sharing options...
Owen Posted April 28, 2015 Author Share Posted April 28, 2015 [quote name='hubrad' timestamp='1430213200' post='2758905'] What manner of bass are you thinking of for this? [/quote] It will be going into this http://basschat.co.uk/topic/128791-shukfellow/ so the longer shaft should be fine. Thanks again everyone. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.