high-low converter, resistor divider? - diyAudio
Go Back   Home > Forums > General Interest > Car Audio

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 7th March 2004, 08:32 PM   #1
azira is offline azira  United States
diyAudio Member
Join Date: Dec 2003
Location: Near Seattle
Default high-low converter, resistor divider?

In my old car I had to use a high-low converter to power my sub amp from my rear speakers. My sister wants to do that with her car right now until she replaces her deck. The ones I bought were isolation transformers. Can she just use a resistor divider (basically a 10k pot) to do the same thing? I was thinking that there shouldn't be much of a problem with it, it's significantly larger impedance than the 4-ohm speaker...
  Reply With Quote
Old 9th March 2004, 12:32 AM   #2
maylar is offline maylar  United States
diyAudio Member
Join Date: Jun 2003
Location: Connecticut
Line Level Converters (LLC) are available pretty cheap. The problem with a resistor divider is that the speaker outputs aren't ground referenced like RCA line inputs are.

In theory it should be possible to run just one side of a speaker output directly to a 10K ohm amplifier RCA input, using the car ground as the other side. You'll only get 4-5 volts rms, which most amps can handle fine. The only issue is how much noise you pick up in the ground side.
  Reply With Quote
Old 9th March 2004, 04:54 PM   #3
azira is offline azira  United States
diyAudio Member
Join Date: Dec 2003
Location: Near Seattle
Ah, thanks for the tip. Nothing in car audio is cheap, it's always way too marked up. I think she settled on an amp that has line level inputs so I guess the problem is adverted. Thanks.
  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
DIY High to Low level converter pjpoes Parts 4 2nd March 2007 12:10 AM
Resistor values in feedback loop/voltage divider??? vynuhl.addict Solid State 29 13th February 2007 03:05 PM
I Want To Build A Very High Quality A/D Converter BillyJoeJimBob Digital Source 25 6th August 2004 08:40 AM
PGA2311 or resistor divider? fmak Parts 2 3rd May 2004 03:34 PM
Better than using a resistor as I/O converter Ryssen Tubes / Valves 0 3rd January 2004 12:50 AM

New To Site? Need Help?

All times are GMT. The time now is 08:50 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.
Copyright Đ1999-2015 diyAudio

Content Relevant URLs by vBSEO 3.3.2