TB W5-704D On Sale

[mike1234]

I'm thinking of building some beefy 7.1 PC speakers. What do you folks think of the TB W5-704D (currently on sale) for mid-bass duty? I know it's inefficient (88db) but each cab will have a dedicated 18w mono amp and p/s so this is of no real concern. These will be 2-way and I'm thinking of using the TB 25-302SH tweeter. I know they must be padded down to match the mid-bass units.

BTW, I'm not "set" on using these so any recommendations are welcome.

At $15 each, I'm just impressed by the price vs performance of these little bass drivers.

[mike1234]

...so I don't need magnetic shielding.

[Paul Carmody]

Today's the day, then, that I finally order them to do the final version of the Aethers. Thanks, PE!

[dlr]

I was looking at this and noticed that the pdf doesn't match. The PE page shows a shielded driver that that has W5-704S on the driver tag. The pdf shows no shielding, but matches the PE number on the page, W5-704D.

I'm not sure which one (shield/no shield) is actually on sale.

dlr

[mike1234]

<A HREF="http://www.partsexpress.com/pe/showdetl.cfm?&Partnumber=275-035">http://www.partsexpress.com/pe/showdetl.cfm?&Partnumber=275-035</A>

If my math is correct, two of the TB mid-bass drivers in close proximity will have an efficiency of ~92-94db, right. So one of the Dayton tweeters is a better match... little/no padding necessary?

[zach_t]

>
> <A HREF="http://www.partsexpress.com/pe/showdetl.cfm?&Partnumber=275-035">http://www.partsexpress.com/pe/showdetl.cfm?&Partnumber=275-035</A>
> If my math is correct, two of the TB
> mid-bass drivers in close proximity will
> have an efficiency of ~92-94db, right. So
> one of the Dayton tweeters is a better
> match... little/no padding necessary?

You will want to concern some baffle step compensation of 3-6 dB, so your final level will be 88-91 dB with two.

Great Deal of the Day!

[mike1234]

...so two will have an estimated efficiency of 89.5 dB. I need to select a less efficient (90 dB) tweeter then.

> You will want to concern some baffle step
> compensation of 3-6 dB, so your final level
> will be 88-91 dB with two.

> Great Deal of the Day!

[revelator]

Zaph's graph shows a flat curve up to about 6k. could it be possible to do a full range (4-ohm) with second side mounted woof (no baffle step), with added tweet 2nd order crossed at say 8k?

Just looking at possbility of minimum x-over components here....

> You will want to concern some baffle step
> compensation of 3-6 dB, so your final level
> will be 88-91 dB with two.

> Great Deal of the Day!

[bill]

> ...so two will have an estimated efficiency
> of 89.5 dB. I need to select a less
> efficient (90 dB) tweeter then.

It's normal for the tweeter to be more efficient than the woofer. Just us a couple of resistors to pad it down.

HTH,
Bill

[Max_Andrews]

http://homepages.nyu.edu/~msa286/pa130mtm2.gif


You could also do the PA130mtm design I've been working on. The PA130 drivers are only $11 each! If you do it sealed they will handle 25 watts and hit around 105dB (1 watt sensitivity 93dB), making an easy blend with a sub (no high pass needed). Just do them sealed in a 12"x7"x5.5"wide (internal) box, and they are cheap at $95 per pair. I'll be building one soon so I'll have some listening impressions to share.

[Andy_G]

> Today's the day, then, that I finally order
> them to do the final version of the Aethers.
> Thanks, PE!

Now that's just cruel. Remember who first pointed them out to you ;-))

Have fun !!

[johnl]

> Today's the day, then, that I finally order
> them to do the final version of the Aethers.
> Thanks, PE!

Are there any good projects using this driver? Any good crossover designs?

[johnl]

> ...so two will have an estimated efficiency
> of 89.5 dB. I need to select a less
> efficient (90 dB) tweeter then.

Try the ND20FA-6