Q on loudspeaker amplification - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way

Multi-Way Conventional loudspeakers with crossovers

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
Reply
 
Thread Tools Search this Thread
Old 22nd July 2007, 06:05 AM   #1
diyAudio Member
 
weinstro's Avatar
 
Join Date: May 2003
Default Q on loudspeaker amplification

It's funny how one thought leads to another, and then another, and then....

I really like the concept of a digital crossover, such as the DCX2496. The universal nit with this device is a) it has pro voltage output levels and b) it doesn't have a ready means of controlling volume.

I'm in the process of working through how to control volume. My leaning at the moment is towards some sort of digital pot, controlled by a Basic Stamp, placed between the DCX and the power amps. Some of these IC's have gain stages built in. Then it occurred to me, how much voltage do I need to feed to the power amps, anyway?

All the amps I have are supposed to generate rated output at 1.5 V input, give or take. The output of the DAC's in the DCX max out at +/- 2.5 Vdc. It has 10dB of gain before this signal is presented to the output jacks.

I'd prefer to avoid the situation common on home audio, where the volume is effectively at max with the volume knob at 1/3rd of a turn.

I can appreciate that it might be desireable to overdrive the input slightly. But, if the player is putting out 0dBfs and the volume knob is at max, how much output voltage is really needed?

Thanks and regards,

Rob
  Reply With Quote
Old 23rd July 2007, 01:08 AM   #2
MadMutt is offline MadMutt  Australia
diyAudio Member
 
Join Date: Nov 2006
Well my take would be that if you have more signal than you need to drive the amp, then (if you can) turn the amps inputs down.
This will reduce the amount of noise getting into the amp to start with.
  Reply With Quote

Reply


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 loudspeaker vs. factory built loudspeaker keyser Multi-Way 83 16th May 2011 12:27 PM
I/V after amplification using current amp? khundude Pass Labs 33 15th June 2008 10:44 PM
Class S amplification gareth Solid State 17 13th May 2008 11:11 AM
amplification? xstephanx Full Range 29 4th June 2006 05:58 PM
Amplification Howard Subwoofers 5 25th December 2004 07:03 AM


New To Site? Need Help?

All times are GMT. The time now is 09:00 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2