Car Amplifier Question - diyAudio
Go Back   Home > Forums > Amplifiers > Class D
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Class D Switching Power Amplifiers and Power D/A conversion

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 12th January 2013, 12:21 AM   #1
abcdmku is offline abcdmku  United States
diyAudio Member
Join Date: Mar 2012
Location: Chicago
Default Car Amplifier Question

I would test this myself, but I'm dorming at school and wont be back home soon. Do car amplifiers putout ~12 volts to the speaker? I know my rack mount amplifier will putout up to 85 volts for the speaker, wasn't sure what the car amplifiers Vp was.


Last edited by abcdmku; 12th January 2013 at 03:09 AM.
  Reply With Quote
Old 13th January 2013, 03:11 AM   #2
diyAudio Member
Join Date: Jul 2007
power = voltage * voltage / resistance

ur rack 85 volts into 4 ohm speaker is
85*85/4 watts= 1806.25 watts

ur rack 85 volts into 2 ohm speaker is
85*85/4 watts= 3612.5 watts

almost all car head units will put 10 volts at the most. coz they use car battery and don't step up the voltage
10*10/4= 25 watts, i see 15-20 rms most of the time, around 20 rms bad distortions

car amps depends, they step up power supply
500 rms car amp will pump what volts in 4 ohm speaker
500= voltage * voltage /4
voltage= 44.72volts
the same 500rms amp may pump more voltage if the rms is 500 but it can peak 600rms
like my sony xm1s car amp does 500watts at 2ohms rms, but 900 watts peak.

500 rms car amp will pump what volts in 2 ohm speaker
500= voltage * voltage /2
voltage= 31.62volts

Hope this helps you

another thing
power = current *current * resistance
power = current * voltage
voltage= current* resistance
  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
Multiple Car Amplifier Question!!!! wascapsfan Car Audio 8 18th September 2012 01:24 PM
car amplifier help abarth92 Car Audio 0 28th July 2011 01:30 PM
car amplifier repair question.... jesimon Car Audio 19 13th June 2007 09:34 AM
Car Amplifier +12-V Connector Question Randy Knutson Car Audio 6 1st October 2005 12:37 AM
I want to build car smps and car amplifier himanshuraval Car Audio 0 20th February 2004 12:40 PM

New To Site? Need Help?

All times are GMT. The time now is 05:23 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