[this_is_vv]

i am looking for a woofer/subwoofer for my desktop project and i want to keep it behind my screen...any idea whats the smallest Hframe subwoofer i can make....

i now there is an 15 and 18 inch people make any ideas about how smaller that can go....

V

[JohnR]

I assume you realize that the smaller you go, the more power/EQ you will need for a given output level. But sitting on your desk, you probably don't a lot of output... maybe a pair of the TB 8" in a Linkwitz W frame would work. I'd worry about an H-frame making too much vibration on the desk. But, you'll be the pioneer here!

[this_is_vv]

I assume you realize that the smaller you go, the more power/EQ you will need for a given output level. But sitting on your desk, you probably don't a lot of output... maybe a pair of the TB 8" in a Linkwitz W frame would work. I'd worry about an H-frame making too much vibration on the desk. But, you'll be the pioneer here!

i dont want to be pioneer i have jist made 2 DIY speakers thats all... i rather go with a known design...

i am using active crossover a single subwoofer or two 8 inch subwoofer???

V

[JohnR]

Well, I don't remember anyone trying to put an OB sub on their desk... perhaps someone has.

If it were me, I'd put it under the desk and start with a pair of 8's or 10's... but I haven't tried it.

[sfdoddsy]

Not just desktop H-Frames, desktop Orions:

http://www.diyaudio.com/forums/full-range/212996-orion-mini-me-micro-me.html

[JohnR]

 

Very nice 

No measurements tho.

[this_is_vv]

i exactly thought the same...looks great wheres the measurement...

[Davey]

You really don't need measurements to confirm what you already know.  That's just a novelty project.....and a pretty neat one.
But the frequency wavelengths and cancellation distances don't support any (real) bass capability.

For a desktop environment, area must be a primary concern, no?  I don't understand why someone would consider an open-baffle project for this usage since it would take up much real estate.

Cheers,

Dave.

[studiotech]

I agree with Davey.  Just make a sub box and put it on the floor.  Then optimize the OB you've already made.  It will be killer!

[this_is_vv]

You really don't need measurements to confirm what you already know.  That's just a novelty project.....and a pretty neat one.
But the frequency wavelengths and cancellation distances don't support any (real) bass capability.

For a desktop environment, area must be a primary concern, no?  I don't understand why someone would consider an open-baffle project for this usage since it would take up much real estate.

Cheers,

Dave.

My desktop area is like him....and what you think about this project...just asking...

http://www.diyaudio.com/forums/subwoofers/146639-office-desk-open-baffle-subwoofer.html


V

[JohnR]

In that one, the woofer is mounted in the wall? If so it's not OB. Not saying that is a problem, just that it's a different scenario. In fact it may be a good option if mounting in the wall is feasible. (That makes it an infinite-baffle)

[studiotech]

Look closely.  It's mounted to the 'modesty panel' of the desk I think.

[JeffB]

I think 11" wide by 11" deep would give you
dipole peak frequency = 1135 * 6 / 22 = 309Hz
You could use the 10" MCM 93db driver from the Hestia project described here.
http://www.audiocircle.com/index.php?topic=108003.0
With 6db attenuation you could run the 10" flat from
155Hz to 309Hz and then use a 3" full range for above 309Hz.
You might get away with 12db attenuation and run from 77Hz.

[JeffB]

I think I did that equation wrong.
It would be
dipole peak = 1135*6 / 33 = 206Hz

So you could try 9"x9" with an 8" woofer
dipole peak = 1135*6/ 27 = 252Hz.

This could be interesting if you want to run two woofers.

[JohnR]

Look closely.  It's mounted to the 'modesty panel' of the desk I think.

Is that what they're called  I don't like them, always afraid I'll bang my shins.

However, that is an excellent idea. I suspect that anything loose on the desk would rattle tho...

[matevana]

Speaking from experience, a properly damped U-Frame made from a 10" cube, housing an Usher 8137a 8" woofer makes an amazing sub in the nearfield. Driver selection is critical here. This driver has very little cone noise which can be uber-annoying when listening up close. By comparison, the Tang-Bands I played with were horrible in that regard.

I no longer own this set-up, but it was an extremely musical sub and no slouch either. I used a single plate amp crossed around 120Hz with built-in 3db boost at 45 Hz. You should be able to use this set-up with a variety of mini OB satellites of your liking. Mine were 3" Peerless full rangers on an 8" wide baffle, about 14" tall. This system impressed many listeners. Probably one of the best desktop OB's I've heard.

[Russell Dawkins]

My desktop area is like him....and what you think about this project...just asking...
http://www.diyaudio.com/forums/subwoofers/146639-office-desk-open-baffle-subwoofer.html
V

This will fit my needs perfectly - my desk is angled with two 45º sides (90º included angle), so the set up is perfect for the two 18" Goldwood GW-1858s that I bought intending to mount into H frames as subs. They will then be basically right under my nearfield monitors, but the desktop will prevent line of sight to the cone. An easy enough experiment.

[this_is_vv]

This will fit my needs perfectly - my desk is angled with two 45º sides (90º included angle), so the set up is perfect for the two 18" Goldwood GW-1858s that I bought intending to mount into H frames as subs. They will then be basically right under my nearfield monitors, but the desktop will prevent line of sight to the cone. An easy enough experiment.

do share some pics please....i will hold uyp till i see what you got...

V

[Russell Dawkins]

Don't wait for me, vv! It will be 6 weeks minimum before I can get to this - I have a carport to turn into a garage and workshop before the weather here turns and becomes miserable - my work is cut out for me, as my father used to say.

The desk is a simple, cheap, metal framed one from Office Depot (now defunct). It is intended, I think, to go into a corner but I have it 1/3 way down the room, about 5 feet from the wall behind it which has a massive wideband acoustic trap covering much of it.

[Poultrygeist]

A single "I" baffle might work for you.