2.5-way or 2-way w/sub? - 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 15th May 2004, 01:30 AM   #1
diyAudio Member
 
dmitriy167's Avatar
 
Join Date: Mar 2004
Location: NJ, USA
Default 2.5-way or 2-way w/sub?

I have a pair of Peerless 6.5" CSX (850122) woofers, and I was wondering if it is better to buy another pair (and have a pair of drivers per speaker in a 2.5way arrangement) or stick to a 2-way with a sub (10"CSX maybe). In both cases, I would use sealed boxes for both the mains and the sub because I like the tighter bass and I can never get the port tuning right. So what would be better for bass extension?
  Reply With Quote
Old 15th May 2004, 01:56 AM   #2
diyAudio Member
 
Bill Fitzpatrick's Avatar
 
Join Date: Jun 2001
Location: Eugene, OR
How about 2.5 way AND 2 12" subs?
  Reply With Quote
Old 15th May 2004, 02:53 AM   #3
diyAudio Member
 
dmitriy167's Avatar
 
Join Date: Mar 2004
Location: NJ, USA
Quote:
Originally posted by Bill Fitzpatrick
How about 2.5 way AND 2 12" subs?

That might be an idea (if I had the money for this kind of setup). But the 6.5" Peerless woofers have some fairly clean bass on their own, but they drop rapidly below 45Hz in my (2-way ported) setup. My goal is to extend the lows of the system down to about 35Hz with the 2.5way or 25 Hz with the sub (or subs). I think 2 12" subs would be a bit too much for my room, and they would take up a heck of a lot of space (like 130L or so) if they were to go to 25Hz in a closed box. Again, I don't have THAT much money to spend; I can always add a second (same) sub later.
  Reply With Quote
Old 15th May 2004, 04:19 AM   #4
diyAudio Member
 
Join Date: May 2003
Location: Washington State, USA
You could get the second pair of 6.5s and mount the second pair in the back in a push-push bipole setup, to take care of baffle step and extend the bass. If it were me I'd tend to go this way also because it's a modular, extensible setup; you can always add a sub later for the bottom octave if you find you want it.

I understand this method is favored by Planet10, there's some info on his web site here.
  Reply With Quote
Old 15th May 2004, 05:43 AM   #5
diyAudio Member
 
Bill Fitzpatrick's Avatar
 
Join Date: Jun 2001
Location: Eugene, OR
dmitriy167:

How are you going to handle the amplification and crossovers?
  Reply With Quote
Old 15th May 2004, 06:16 AM   #6
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Quote:
Originally posted by HeatMiser
You could get the second pair of 6.5s and mount the second pair in the back in a push-push bipole setup, to take care of baffle step and extend the bass.
Who woulda guessed this would be the way i'd go

Keep in mind that a 2nd driver the same won't take you any lower, just give you more.... which with a 6.5 & 45 Hz is almost required.

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 15th May 2004, 10:20 AM   #7
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
A small sealed box with an added subwoofer is your best bet.

A 2.5 way will give more volume and efficiency but not more bass,
not unless you build a 50 litre reflex tuned to around 36Hz.

http://www.speakerbuilder.net/web_fi...k/pcrkmain.htm

A sealed version with 0.5cuft / 14L stuffed will be fine, Q ~ 0.7.

For your subwoofer, unless the driver is specifically designed
for sealed boxed loading an overdamped reflex is better.

sreten.
  Reply With Quote
Old 15th May 2004, 02:50 PM   #8
rabbitz is offline rabbitz  Australia
diyAudio Member
 
rabbitz's Avatar
 
Join Date: Jul 2003
Location: Newcastle, Australia
Quote:
Originally posted by HeatMiser
You could get the second pair of 6.5s and mount the second pair in the back in a push-push bipole setup, to take care of baffle step and extend the bass. If it were me I'd tend to go this way also because it's a modular, extensible setup; you can always add a sub later for the bottom octave if you find you want it.
This is what I did with mine using the 850122's. Very effective, and mainly used it for BSC. More bottom end now but does not go any lower. Has a perception of going lower but I think it's only the increase in SPL due to BSC.
  Reply With Quote
Old 15th May 2004, 05:16 PM   #9
diyAudio Member
 
dmitriy167's Avatar
 
Join Date: Mar 2004
Location: NJ, USA
Quote:
Originally posted by sreten
A small sealed box with an added subwoofer is your best bet.

A 2.5 way will give more volume and efficiency but not more bass,
not unless you build a 50 litre reflex tuned to around 36Hz.

sreten.
I am building a pair of ~50L boxes now, and this is an option. But I don't like the idea of a port too much. I like my bass tight.

Quote:
Originally posted by rabbitz


This is what I did with mine using the 850122's. Very effective, and mainly used it for BSC. More bottom end now but does not go any lower. Has a perception of going lower but I think it's only the increase in SPL due to BSC.
I should have thought of this from the start. I might be able to mount the drivers in a bipole config in the 50L sealed boxes. The question then is if I should make the back drivers take care of the bass only, or if they could run into the midrange like the front drivers.
  Reply With Quote
Old 15th May 2004, 05:47 PM   #10
rabbitz is offline rabbitz  Australia
diyAudio Member
 
rabbitz's Avatar
 
Join Date: Jul 2003
Location: Newcastle, Australia
Quote:
Originally posted by dmitriy167
The question then is if I should make the back drivers take care of the bass only, or if they could run into the midrange like the front drivers.
I use mine only for BSC and roll off from 575Hz using a 1st order crossover. BTW, mine are used in a vented box. If you are building a 50 litre box you could always try sreten's suggestion of trying a vented box tuned to 36Hz. If you don't like it you can then go sealed....... or build 1 of each and compare. Just a thought.

Cheers
  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



New To Site? Need Help?

All times are GMT. The time now is 05:24 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