Altair Sub (2x TRIO8's)

Bigun · 9th March 2009, 01:18 AM

The design is now finalized and deserved of a properly titled thread

[contd. from : http://www.diyaudio.com/forums/showt...58#post1765758]

For those who don't know, this project is part of my attempt at assembling a HT system. The surrounds were done already [see: My 'Moon-Onken'] and now we have the matching sub.

The theme is Forbidden Planet and the sub is named after the planet they landed on.

Bigun · 9th March 2009, 01:22 AM

The box pretty much finished. Varnished and painted waiting for drivers and plate-amp to be installed. The design provides for a hollow tunnel through the box between the drivers. This is perhaps an unusual arrangement for bracing. However, it makes assembly and other tasks very much easier and I highly commend this approach.

I have assembled the drivers and amp temporarily and applied power - and heard some low frequencies....

this is a good moment to thank all those who have provided advice (Dave of planet10, Moondog55 and others)

planet10 · 9th March 2009, 01:38 AM

lookin' good

dave

AKN · 10th March 2009, 10:15 PM

Quote:

Originally posted by planet10
lookin' good

dave

Yep, agree.

Any bass notes yet?

Bigun · 11th March 2009, 04:43 PM

It's been breaking in and sounding nice, ti really fills out the low end for the Moon-Onkens nicely - but the plate amp is not screwed into the box yet so it isn't exactly 'sealed'. I hope this weekend to remove the drivers, tidy up the soldering of the wires to the drivers and finish it all up. Then I'll be able to update my impressions.

p.s. Not having had a sub before I was still surprised (despite warnings) how much the bass gets localized in and around the house.

MartinQ · 11th March 2009, 06:43 PM

Quote:

Originally posted by Bigun
p.s. Not having had a sub before I was still surprised (despite warnings) how much the bass gets localized in and around the house.

This is why it is much better to invest in 3 or 4 smaller subs than one large one. Uneven low frequency response is inherent for indoor small-room listening.

http://www.mehlau.net/audio/multisub_geddes/

Bigun · 11th March 2009, 10:42 PM

No doubt several subs have their advantage, but after making all the surounds I didn't want to make several subs. One is enough in terms of effort and I'm prepared to take some time to optimize the setup I have.

There are many variables involved even with one sub, optimization with many subs adds to the complexity. reduces WAF, can add to the cost. I leave that avenue for others to explore.

In fact, my speaker making days may be winding down now. Having made what I need in the way of speakers I am busy soaking up knowledge about amplifiers...

Bigun · 16th March 2009, 07:35 PM

I had time to finish the thing properly. Here's a couple of photos, front shot showing inverted driver to one side, back shot showing amp and regular driver to side.

Bigun · 16th March 2009, 07:36 PM

this is probably the end for my foray into this forum. Now I have to learn about amplfiers (over on the Solid State forum).

MartinQ · 18th March 2009, 02:09 PM

Looks great! Any comments or reflections on this build you can share?

9th March 2009, 01:38 AM	#3
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 5	lookin' good dave __________________ community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

11th March 2009, 04:43 PM	#5
Bigun diyAudio Member Join Date: Jan 2009 Blog Entries: 2	It's been breaking in and sounding nice, ti really fills out the low end for the Moon-Onkens nicely - but the plate amp is not screwed into the box yet so it isn't exactly 'sealed'. I hope this weekend to remove the drivers, tidy up the soldering of the wires to the drivers and finish it all up. Then I'll be able to update my impressions. p.s. Not having had a sub before I was still surprised (despite warnings) how much the bass gets localized in and around the house. __________________ "The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed." Robert M Pirsig.

11th March 2009, 10:42 PM	#7
Bigun diyAudio Member Join Date: Jan 2009 Blog Entries: 2	No doubt several subs have their advantage, but after making all the surounds I didn't want to make several subs. One is enough in terms of effort and I'm prepared to take some time to optimize the setup I have. There are many variables involved even with one sub, optimization with many subs adds to the complexity. reduces WAF, can add to the cost. I leave that avenue for others to explore. In fact, my speaker making days may be winding down now. Having made what I need in the way of speakers I am busy soaking up knowledge about amplifiers... __________________ "The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed." Robert M Pirsig.

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18th March 2009, 02:09 PM	#10
MartinQ diyAudio Member Join Date: Jul 2004 Location: Ontario, Canada	Looks great! Any comments or reflections on this build you can share?

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