Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Multi-Way Conventional loudspeakers with crossovers

Small room speakers? Help wanted!
Small room speakers? Help wanted!
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 13th January 2007, 12:31 AM   #1
Spasticteapot is offline Spasticteapot  United States
diyAudio Member
Join Date: Jan 2006
Location: Wisconsin....what did you expect?
Send a message via AIM to Spasticteapot
Default Small room speakers? Help wanted!

I'm heading off to a small, cramped dorm room in about a year and a half. As a result, I figure I should go for a pair of compact speakers that will work well in the itsy-bitsy room I'm likely too be living in.

I've recently been offered a pair of mysterious woofers - Hi-Vi E6's - with no data availible anywhere. They're coated-paper drivers with phase plugs, and the price is right. I'm likely to buy these, but I can buy another pair of woofers between now and then - I figure it's worth the investment in a good pair of high-quality woofers.

T/S on # 1

Qts .378
Qes .387
QMS 17.7
Fs 47.8 Hz.
Re 6.1
Dia eff. 125 mm
VAS 22.3 L
SPL 89.84

T/S on #2

Qts .395
Qes .403
QMS 20.2
Fs 49.9 Hz.
Re 6.1
Dia eff. 125 mm
VAS 20.23
SPL 89.78

According to WinISD, this should use a box 16.75 inches tall, 10.75 inches wide, and 6.75 inches deep - I'm not sure which face I'm supposed to put the driver on. The chart says I get -3db at 50hz - not too shabby. This is without a crossover, too, and I may just make a LM3875-based four channel amplifier so that I can use active EQ to help improve the bass, or just use a small subwoofer.

For the tweeter, I'm a bit torn. I'm still working on my first "proper" pair of speakers based around some Peerless buyout woofers I bought really, really cheaply off eBay. I'm looking for even more quality in treble than I am in bass - many years of stuffing paper in my ears at concerts has left me with very good high-frequency hearing, at least when my ears are not full of wax.

One option is the Bohlender-Graebner Neo3 PDR. While the response curve is a bit wonky, they're supposed to be very good, and the "beaming" effect might be an advantage in such an in-optimal mounting situation.

Another is a standard dome tweeter, like the 27TDFC. These work very, very well, and cost a good bit less. Which is better is often a matter of opinion, though.

That said, the matter may be solved simply by whichever I can get cheap first.


After some more thinking, I think I can put up a set of design goals.

1. Good quality in a small room. I'd like to go "one step better" than Zaph's Silver Flute design - I'm not going to have any other speakers, so these should be pretty bloody good. Admittedly, I can't afford more than about $100 for the pair, but I intend on using used drivers, and the woofers should only cost me $30/pair.

2. Good treble. A lot of people like the Neo3 PDR, and I think that's the best choice. They're also used a good bit in "monitor" style speakers.

3. Small size and ease of placement. While these are not in the same category as Bose Crap-Cubes for size, they're not exactly Klipschorns either. In other words, these should be mountable in the corners of a room near the ceiling, and should be no larger than, say, my Baby Advents.

4. Not unreasonable cost. Please, no Usher woofers or Hiquphon tweeters, unless they're really cheap.

Now, for the things which make design easier.
1. Active crossovers. I would not have much trouble building a 4-channel amplifier to drive these, though a passive crossover certianly would make my life easier.

2. SPL. I listen to my speakers at a very low volume level, and it won't be at more than about two meters. Hence, low output is no biggie.

3. Efficiency. These will be driven by at least 25 watts per channel, and as you can see above, that's plenty.

4. Deep bass. 50hz is adequate for me, especially in a small room.

5. No hurry. I'm likely just to toss the woofers into boxes, use some Peerless of India tweeters I got for $10/pair, and be done with it - I need some speakers for my room anyway.
  Reply With Quote
Old 13th January 2007, 01:05 AM   #2
lndm is offline lndm  Australia
diyAudio Member
Join Date: Mar 2006
Location: nsw
The dorm rooms I've been in were larger than but comparable with automotive cabin space. Room gain is going to help, and so can WinISD.

When I designed my last car sub, I had WinISD simulate room gain by (if I remember rightly) creating an inverse Linkwitz transform and summing that with the sub/box response (I googled a tutorial).

I was open minded about closed versus vented and tried both until I found a combined flat response. Though I used a 12" woofer, it has a relatively high fs and low Qts and so comes across to me as a smaller woofer just with larger volume displacement.

With some tweaking I now get an apparently flat response down low.
  Reply With Quote
Old 13th January 2007, 04:18 PM   #3
Tenson is offline Tenson  United Kingdom
diyAudio Member
Join Date: Feb 2006
Location: Kent
Get a Behringer DEQ2496, regarding bass it is a god-send for small rooms.

I found my AML1s were great in a small room, so maybe a standmount with transmission line. Perhaps the Seas L18RCY/P (H1085) would suit that and a Hi-Vi RT8II would allow a nice low crossover away from any resonance, it also has a reasonably high directivity (and well controlled) in the treble-mid so again a good solution for a small room. That should make a super system.
  Reply With Quote


Small room speakers? Help wanted!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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
RCF speakers, thiel and small parameters wanted please ! dock Multi-Way 1 24th August 2008 07:42 AM
Big Room to Small Room CARTRulz Subwoofers 1 21st August 2006 05:59 AM
Small Monitors, Small Room Seth Smith Multi-Way 0 30th January 2006 05:01 AM
cheap speakers for a small room Scorper Multi-Way 1 1st July 2003 04:23 PM
Tri-axial Car Speakers for Small Room? r_s_dhar Multi-Way 14 13th November 2002 06:49 AM

New To Site? Need Help?

All times are GMT. The time now is 02:26 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio