Loud Class D guitar amplifier wanted - 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 26th June 2011, 07:40 PM   #1
Join Date: Jun 2011
Default Loud Class D guitar amplifier wanted


I wish to buy a Class D guitar amplifier, and i want it to be loud.

It will only be used at home, but i want it loud.

How many Watts do i need?
  Reply With Quote
Old 26th June 2011, 07:48 PM   #2
diyAudio Member
runebivrin's Avatar
Join Date: Jul 2003
Location: Huddinge, Sweden
Send a message via MSN to runebivrin

Actually, a guitar amp for home use needs little more than 20W to ear piercing if you use a proper guitar speaker. They are very efficient in a rather narrow frequency range.
Do wizards use spell checkers?
  Reply With Quote
Old 26th June 2011, 08:43 PM   #3
diyAudio Member
Join Date: Nov 2007
Location: Dallas
Eminence Red Coat The Wizard 12" Guitar Speaker 8 Ohm

LOUDspeaker easily makes more difference than the amp.
Each +3db increase in sensitivity is like double the power.
Each -3db decrease in sensitivity is like cutting power in half.

Typical home stereo speaker 88db or less, subs even worse...
Typical guitar speaker (Peavey's cheapest) like 96db.
Eminence Wizard is 103db!!!

You can think Wizard doubles your efficiency five times (Yes 32x!).
Or home stereo speaker wastes half your power five times over...

Typical speakers are terribly inefficient, far less than 1%. They
lack magnet strength, have huge gaps, and voice coil overhang,
throwing around too much dead weight. A 300W lightbulb might
be higher rated than any guitar speaker, but it won't be as loud.

Loud starts with the most efficient speaker, Watts are no big deal.
But you want enough watts to push the speaker cone into breakup.
A 75W Wizard probably wants at least 10W to breakup properly.
Less efficient speakers will of course need more watts to do so.

You can gain +6dB coupling efficiency by arraying four speakers in
half stack configuration. Louder for the same Watt, yes. But you
then need 4x as many watts to reach cone breakup, and lose the
option to play fewer Watts without sounding lame.

Last edited by kenpeter; 26th June 2011 at 08:52 PM.
  Reply With Quote
Old 26th June 2011, 09:03 PM   #4
diyAudio Member
Join Date: Jul 2010
Location: Chicago
None. No amount of watts will make an amplifier loud.

It is not possible for an amplifier to be loud (except when dropped from a great distance onto a firm surface).

All of my amplifiers are silent (except for the noise they introduce into the signal being amplified).
  Reply With Quote
Old 27th June 2011, 01:14 AM   #5
diyAudio Member
Join Date: Feb 2008
Location: Jackson,michigan
The choice of speakers is definetley the biggest factor to determine loudness.

But why class d may I ask as some of the best sounding guitar amplifiers are either all tube or have tube preamps with the excecption of a few of course.

I was not aware that there are such animals although it does not suprise me.

The cool thing is that Anges Young of ACDC doesn't use any distortion devices at all and only realies on the pure power and distortion that his amps produce.


Last edited by geraldfryjr; 27th June 2011 at 01:18 AM.
  Reply With Quote
Old 27th June 2011, 01:27 AM   #6
diyAudio Member
nigelwright7557's Avatar
Join Date: Apr 2008
Location: Carlisle, England
Originally Posted by geraldfryjr View Post

The cool thing is that Anges Young of ACDC doesn't use any distortion devices at all and only realies on the pure power and distortion that his amps produce.

There is nothing sweeter than a valve amp at full bore.
The nearest I have come to it us using a soft limiter.
The soft limiter has a couple fo transistors in the feedback loop with the bases fed from a pot. You can find a sweet spot on the pot.
Murton-Pike Systems PCBCAD51 pcb design software. http://www.murtonpikesystems.co.uk
  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
How many Watts for loud Class D Guitar amp? eem2am Music 8 30th June 2011 01:37 PM
Class D amplifier for a guitar sustainer - eh? peskywinnets Class D 10 20th November 2010 05:40 PM
Still looking for loud mosfet power amplifier Dusk Solid State 30 27th July 2005 02:16 AM
Pure Class A amplifier with FET - schematic wanted DJG Solid State 37 6th September 2002 02:02 PM

New To Site? Need Help?

All times are GMT. The time now is 12:50 AM.

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