Go Back   Home > Forums > General Interest > Car Audio

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 7th January 2008, 02:34 AM   #1
Clipped is offline Clipped  Thailand
diyAudio Member
 
Join Date: Mar 2005
Location: home
Send a message via MSN to Clipped
Default orion 2150sx boost circuit

anyone know which part of the board the boost circuitry is located?

i want to change the boost frequency from 40hz to around 45-47ish hz...on the low boost side .

and possibly change the high boost to a second low boost at an octave higher than the low boost...or somewhere around there.

how would you calcuate the values for the components used to determine the boost frequencies?

thanks
  Reply With Quote
Old 7th January 2008, 06:40 AM   #2
ECM is offline ECM  United States
diyAudio Member
 
Join Date: Jul 2004
Location: Cyprus
I have looked into this myself, but instead of changing the frequency, I wanted to bypass the mid and high.

I started to trace (but never completed) the signal thru the boost button over to a couple of op amps. It seems like orion uses a standard RC network around the opamp to produce the boost curve. Your best bet would be to draw out the entire boost circuit to determine which kind of filter topology is being used then it should be easy to calculate the desired center frequency.

Have you measured the frequency response with the boost enabled? I wouldn't be surprised if the frequency is off by a few Hz here and there due to tolerances in the resistors and capacitors. You may already be at 45Hz.

BTW, 9 hrs to go and still high bidder.
  Reply With Quote
Old 7th January 2008, 06:42 AM   #3
ECM is offline ECM  United States
diyAudio Member
 
Join Date: Jul 2004
Location: Cyprus
Now that I think about it, orion may have just produced a "null" at the mid frequency to give the illusion of boosted highs and lows.
  Reply With Quote
Old 7th January 2008, 02:20 PM   #4
ppia600 is offline ppia600  United States
diyAudio Member
 
Join Date: Jun 2007
Location: Louis y ana
Quote:
Originally posted by ECM
I have looked into this myself, but instead of changing the frequency, I wanted to bypass the mid and high.

I started to trace (but never completed) the signal thru the boost button over to a couple of op amps. It seems like orion uses a standard RC network around the opamp to produce the boost curve. Your best bet would be to draw out the entire boost circuit to determine which kind of filter topology is being used then it should be easy to calculate the desired center frequency.

Have you measured the frequency response with the boost enabled? I wouldn't be surprised if the frequency is off by a few Hz here and there due to tolerances in the resistors and capacitors. You may already be at 45Hz.

BTW, 9 hrs to go and still high bidder.
Btw, which amp are you bidding on? Is it the orion nt 100? For being brand new it looks like its been sitting out of the box for quite a while, kind of dusty.. I wonder what its going to go for, I"m guessing around $675-700.
__________________
Don't worry... you can always turn the gain down!
  Reply With Quote
Old 7th January 2008, 04:43 PM   #5
ECM is offline ECM  United States
diyAudio Member
 
Join Date: Jul 2004
Location: Cyprus
no, the orion 2150SX with extra heat sink. got it for $150, will be shipping it to Clipped once I get it.

http://cgi.ebay.com/ws/eBayISAPI.dll...MEWA:IT&ih=003
  Reply With Quote
Old 9th January 2008, 02:21 PM   #6
Clipped is offline Clipped  Thailand
diyAudio Member
 
Join Date: Mar 2005
Location: home
Send a message via MSN to Clipped
ECM...is helping to contribute to my bass addiction

you see the collection of old school processors? oh man those are hard to find... wonder how they compare to equipment nowadays, seems like the output voltage would be lower than todays equipment.

im tracing the boost path as i speak...maybe i'll try plugging in different values and see what happens.
  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
Stabilizing Orion 2150sx Clipped Car Audio 8 22nd December 2007 12:36 PM
Orion 2150SX redblaze Car Audio 50 24th May 2007 08:36 PM
Orion 2150SX redblaze Car Audio 3 13th October 2006 12:04 AM


New To Site? Need Help?

All times are GMT. The time now is 08:34 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