In Active crossover application, OPA2134 and OPA2604, which is better? - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 9th November 2006, 09:37 AM   #11
diyAudio Member
 
Join Date: Dec 2003
Location: earth
tl072 and lf353 are the industry std. ones using in some very good actives
  Reply With Quote
Old 9th November 2006, 09:44 AM   #12
diyAudio Member
 
georgehifi's Avatar
 
Join Date: Sep 2003
Location: Manly Australia (Jewel of the Pacific)
Send a message via MSN to georgehifi
Quote:
Originally posted by lt cdr data
tl072 and lf353 are the industry std. ones using in some very good actives
Yeah and NE5532's are the industrie standard for output opamps and we all know they sound like ----, so do the TL072's and the LF353's.. It's because they can buy them in bulk for a couple of cents and they do the job, but only just.

My two cents worth
__________________
Avatar : Production Lightspeed Attenuator
www.lightspeedattenuator.com
  Reply With Quote
Old 9th November 2006, 07:32 PM   #13
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
Quote:
Originally posted by mlloyd1
i think the opa2604 is (at least designed to be) unity gain stable - no minimum gain requirement, such as the OPA637 has.

i think Nelson was pointing to something else in the design/operation of OPA2604?
The circuit didn't oscillate - it sounded bad.

This is a topic worthy of a thread all by itself, as it applies to
the sound of op amps, chip amps, and other circuits with
high open loop gains.

It is my observation that as the phase margin gets thin, the
sound starts to suffer, and while many of these circuits don't
show actual oscillation, the approach to that boundary puts
the behaviour into fractal territory.

It's easy to experiment with, as pointed out in the first post
of my thread "7 easy pieces"

The example schematic was:

www.passlabs.com/np/GC-VAR-INV-FDBK-1a.pdf

  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
Ad847,ad797,opa2604,OPA2132,OPA2134 : Sop8 To Dip8 uhcmos Swap Meet 1 3rd December 2008 11:28 AM
DIY active x-over for 2.1 application peter_m Multi-Way 17 16th December 2007 04:22 PM
Is a crossover circuit really needed for this sound reinforcement application tspringer99 Multi-Way 17 24th January 2006 03:35 AM
OPA2134 or OPA2604 JoeBob Solid State 5 7th January 2002 11:20 AM


New To Site? Need Help?

All times are GMT. The time now is 07:07 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