Passive input filters - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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 14th April 2016, 02:39 PM   #1
nzlowie is offline nzlowie  Australia
diyAudio Member
 
Join Date: Jun 2015
Default Passive input filters

Hi all
In the process of building an active horn speaker setup. I have the 3 amps needed and was thinking about using simple passive filters on the input of each amp, are there any reasons not to try this?
I want the bass to roll off at say 400 hz with a first order slope so a simple resistor and capacitor filter on the amp input could do this, correct?

What do you think......

Thanks

Sent from my SM-T800 using Tapatalk
  Reply With Quote
Old 14th April 2016, 11:57 PM   #2
djk is offline djk
diyAudio Member
 
djk's Avatar
 
Join Date: Feb 2001
Location: USA
Should work fine, as long as driven from a low source impedance.

(no passive volume controls, or preamps like the Marantz Model 7 with its control on the output side)
__________________
Candidates for the Darwin Award should not read this author.
  Reply With Quote
Old 15th April 2016, 12:30 AM   #3
rayma is offline rayma  United States
diyAudio Member
 
Join Date: Apr 2011
Location: Upper midwest
Quote:
Originally Posted by nzlowie View Post
I have the 3 amps needed and was thinking about using simple passive filters
on the input of each amp. I want the bass to roll off at say 400 hz with a first order slope.
This can work well if the drivers' bandwidths extend well beyond the crossover points.
Be sure to take into account: differing driver efficiencies; differing amplifier gains;
preamp source impedance; amplifiers' input impedances. All these will affect the results.
The drivers should also be time aligned.

Last edited by rayma; 15th April 2016 at 12:33 AM.
  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
Acrive - Passive Filters for Magnepan MG111a Acoustannoy Planars & Exotics 18 27th January 2013 06:22 AM
Passive low-pass passive for line input - 2nd part andreaemme Analog Line Level 0 9th June 2011 03:04 PM
A question about measuring passive filters... Fedess Multi-Way 7 18th January 2011 07:44 PM
Inductors for passive filters miallen Parts 7 3rd December 2010 08:39 AM
passive filters for DACs plp Digital Source 10 17th August 2006 01:31 AM


New To Site? Need Help?

All times are GMT. The time now is 02:38 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.
Copyright 1999-2016 diyAudio

Content Relevant URLs by vBSEO 3.3.2
Wiki