Expensive transformer for bass DI? - Page 2 - diyAudio
Go Back   Home > Forums > Live Sound > Instruments and Amps
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Instruments and Amps Everything that makes music, Especially including instrument amps.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 27th November 2012, 08:41 PM   #11
diyAudio Member
chrispenycate's Avatar
Join Date: Aug 2006
Location: W.Sussex
There's no doubting that a Jensen DI transformer will give a good sound, just whether, for a particular application, it's worth the not inconsiderable sum it costs. I have, over the years, collected a fair number of mic input transformers out of scrapped out tube studio gear (and occasionally installation PAs). I've found that these, while not designed for DI, gave a precision in the sound sufficiently exceeding miked speakers that I've frequently had to filter them down to prevent them invading the mix – live or studio. Driven fron a low impedance (which even a tube preamp should be), their frequency response is more than adequate, and at bass guitar frequencies (which do not descend into the chthonian depths like synthesizers and bass drums) they give masses of level for anything with a mic sensitivity input before any core saturation.

For the 10kΩ transformer mentioned above I'd recommend a cathode follower, or it won't be the transformer distorting but the tube driving it.
  Reply With Quote
Old 28th November 2012, 07:08 AM   #12
diyAudio Member
Join Date: May 2002
Location: Switzerland
What do you regard as expensive ? Here you can have transformers by Neutrik that go down to 30 hz and cost around USD 30 (probably more in the US) in the "naked" version. If you want one that is capsuled in u-metal then it costs about three times that much.

If you have a transformer with three windings you may probably use it with some NFB to further reduce THD and improve FR at the same time.



Last edited by phase_accurate; 28th November 2012 at 07:11 AM.
  Reply With Quote
Old 28th November 2012, 06:22 PM   #13
diyAudio Member
ruffrecords's Avatar
Join Date: Jun 2007
Location: Holt, Norfolk
The thing about transformers is that their bass response depends mainly on the primary inductance and the bigger the inductance the better the bass response. Obviously more inductance costs more money so it it is not surprising that a good transformer for a bass DI is going to be expensive. The cheap transformer made bu the likes of OEP have relatively low primary inductance and so are not ideal for bass DI. The more expensive makes like Sowter and Jensen generally have a much higher primary inductance and hence work better for bass DI.


  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Help needed with direct output (DI) for bass amp funk1980 Instruments and Amps 11 3rd February 2012 09:53 PM
DIY bass transformer for ESLs ? SM7UYJ Planars & Exotics 35 11th April 2011 12:09 AM
Expensive signal caps extinguish bass? FlexQ Chip Amps 18 20th March 2009 04:03 AM
need Acoustat bass transformer... moray james Planars & Exotics 2 15th February 2007 07:22 PM
power transformer why expensive ? ger56 Solid State 1 6th November 2004 10:59 PM

New To Site? Need Help?

All times are GMT. The time now is 10:54 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2