Tri-axial Car Speakers for Small Room? - 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 12th November 2002, 05:05 AM   #1
diyAudio Member
 
Join Date: Jun 2002
Location: Mangalore, Karnataka State, India
Default Tri-axial Car Speakers for Small Room?

Could anybody care to share opinion/experience on the feasibility/advisability of using tri-axial automobile speakers (say, 13/24 cms) for a small room (10/11 square feet)?
  Reply With Quote
Old 12th November 2002, 05:11 AM   #2
halojoy is offline halojoy  Sweden
On Hiatus
 
Join Date: Nov 2002
I am in favour of 2-way with center mount tweeter.
I have a pair Pioneer with 4" woofer.
Would have liked 5", but the shop had them not.
Have not built any boxes.
I have no idea what size I should build.
  Reply With Quote
Old 12th November 2002, 08:41 AM   #3
navin is offline navin  India
diyAudio Member
 
navin's Avatar
 
Join Date: Jan 2002
Location: Mumbai (Bombay), India
Send a message via MSN to navin Send a message via Yahoo to navin
10 sq. ft. awfu small aint it?

i would guess that at that point a pair of 5" coaxial full ranges that planet10 talks about shoud do.

one idea would be in wall mounting are the walls brink? can you make a cabinet by making a hole in the wall.

i did something like this to a bathroom. stuck in a pair or relatively weather proof (read as rubber surround, shielded, pastic cone) 4" full range drivers and used plastic grills from an automobile speaker for protection.
__________________
...still looking for the holy grail.
  Reply With Quote
Old 12th November 2002, 10:49 AM   #4
diyAudio Member
 
FrankDIY's Avatar
 
Join Date: Mar 2001
Location: Quebec City
I did the same thing with old but very good 7'' x 10'' speakers. See picture. The box is 75% filled with accoustic wool used for house. The bad thing with these drivers is that it is impossible to measure the T/S parameters with a software since all the 3 ways are connected together internally.

4 ohms, 240W, carbon fiber, built-in crossover.

Click the image to open in full size.

Click the image to open in full size.
__________________
Imagination is more important than knowledge. knowledge is limited, imagination encircles the world. Albert Einstein
FrankDIY's Audio Corner
  Reply With Quote
Old 12th November 2002, 11:02 AM   #5
diyAudio Member
 
Lligior's Avatar
 
Join Date: Oct 2002
Location: US - Kentucky
I am using a pair of 10cm two-way car speakers. The tweeter was originally mounted over the woofer, I took it offand mounted it just above the the 'woofer'. It has an internal crossover and works great. They are not particularly efficient and even on a cheap stereo (maybe 10W low quality) they fill a decent sized room with sound. I was fortunate and found some T/S numbers for these and ended up with a box about 3-4L and a really small port. Worked out great for me.
__________________
First Audio...
Then the darkness control knob on my toaster
  Reply With Quote
Old 12th November 2002, 11:18 AM   #6
diyAudio Member
 
mrfeedback's Avatar
 
Join Date: Feb 2002
Location: Perth, Australia.
Default feasibility/advisability of using tri-axial automobile speakers

If you look closely and are carefull you can usually change the bi-polar electrolytic caps to polypropylene (PP) ones.
You may also want to change values to fine tune your sound.
Mount these into a reasonable size box and they should be fine.


The box is 75% filled with accoustic wool used for house.
DO NOT EVER USE FIBREGLASS WOOL as damping material.
The fibres are dangerous and irritant, and still get out of the box no matter what you do.
Polyester wool, sheeps wool and foam rubber are fine.

Good luck, Eric.
  Reply With Quote
Old 12th November 2002, 11:25 AM   #7
diyAudio Member
 
FrankDIY's Avatar
 
Join Date: Mar 2001
Location: Quebec City
It is a sealed box (because my drivers were "free air") and I did not use fiberglass. It is a non-toxic material but I don't remember the real name. It is for the ceilling. It is the kind of stuff that you need a blower.
__________________
Imagination is more important than knowledge. knowledge is limited, imagination encircles the world. Albert Einstein
FrankDIY's Audio Corner
  Reply With Quote
Old 13th November 2002, 03:33 AM   #8
diyAudio Member
 
Join Date: Jun 2002
Location: Mangalore, Karnataka State, India
Default Triaxial speakers

Thanks, all forum members.

Firstly, let me correct a small mistake -- the room size is not 10 Sq Ft, it is 10X11 (110 Sq Ft)

Room area besides, I would like to know something about the following:

1. The order of crossover (is it 1st, 2nd, or 3rd order)

2. Is it true that these bi- and triaxial speakers use only bipolar caps as crossover elements? Are these bipolar caps used in conjunction with the inductance of the loudspeaker coild?

3. Can individual drivers in a triax assembly be taken apart and mounted separately (as one reply suggests)?

Thanks, all good samaritans.
  Reply With Quote
Old 13th November 2002, 03:49 AM   #9
halojoy is offline halojoy  Sweden
On Hiatus
 
Join Date: Nov 2002
Default Re: Triaxial speakers

Quote:
Originally posted by r_s_dhar
I would like to know something about the following:

1. The order of crossover (is it 1st, 2nd, or 3rd order)
2. Is it true that these bi- and triaxial speakers use only bipolar caps as crossover elements? Are these bipolar caps used in conjunction with the inductance of the loudspeaker coild?
3. Can individual drivers in a triax assembly be taken apart and mounted separately (as one reply suggests)?
Thanks, all good samaritans.
1. order of crossover? 2. Cap only filter?
-if you mean what is in a bought speaker,
it is 90% probable 1st order,
and a first order is just a Cap.
-if you mean what you should try, there is no rule
it depends on the data of the element

3. That thing you will have to find out.
"evereything put together, sooner or later falls apart"
Some may be put together that it is possible to take them apart,
without hurting the things.
The easy thing, mostly, would be just to change the CAP. As suggested.

I think, myself, that there is not much to gain by separating the elements.
The engineers who designed them, can not be all that bad.
  Reply With Quote
Old 13th November 2002, 04:20 AM   #10
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Default Re: Re: Triaxial speakers

If you haven't already gotten a triaxial, i'd suggest a coaxial or a full-range. Triaxials are really just marketing animals. They aren't woofer, mid, tweeter, but almost FR, tweeter, super tweeter with XOs on the order of 8 & 12k. The XO is just a single bipolar cap.

So if you get a coax have a good look at it and make sure you can get at and change the XO cap. A better cap (and sometimes a different value) are waranted.

Some of the FR units are real sleepers. There is a Delco (General Motors -- factory installed) 6x9 4 ohm whizzer cone (not the 10 ohm unit -- it isn't too bad either thou) unit that is outstanding. You find these at garage sales for $2-5/pr and you just laugh all the way home because you know the guy replaced them with couple hundred buck triaxials and he just doesn't seem to get as much out of his carFi as before

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

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
Small room speakers? Help wanted! Spasticteapot Multi-Way 2 13th January 2007 04:18 PM
1950's Parmeko Co-axial 15" BBC speakers tom1356 Multi-Way 35 26th March 2006 04:14 AM
Small Monitors, Small Room Seth Smith Multi-Way 0 30th January 2006 05:01 AM
Gauss 3288 12" Co-axial Speakers snoopyma Multi-Way 5 28th November 2004 03:07 PM
cheap speakers for a small room Scorper Multi-Way 1 1st July 2003 04:23 PM


New To Site? Need Help?

All times are GMT. The time now is 09:26 PM.


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