Point Source Driver for HT *PIC*

[mike1234]

Provided Link: 3" Coaxial Midrange


Is there anything wrong with using point source drivers for HT? Of course, these little 3" coaxials (link) will need bass reinforcement. One of these would sit nicely atop or underneath a TV.

[Dirk]

> Is there anything wrong with using point
> source drivers for HT? Of course, these
> little 3" coaxials (link) will need
> bass reinforcement. One of these would sit
> nicely atop or underneath a TV.

Nothing wrong with it at all. People use full-range drivers for home theater all the time.

[mike1234]

...three or four inch coaxials for HT because I don't care about hi-fi as much with movies as compared to dedicated music listening. I do care about accurate image placement though.

> Nothing wrong with it at all. People use
> full-range drivers for home theater all the
> time.

[wlb]

> Is there anything wrong with using point
> source drivers for HT? Of course, these
> little 3" coaxials (link) will need
> bass reinforcement. One of these would sit
> nicely atop or underneath a TV.
Coax speakers work great for HT, I use 8" coax all around on my HT. The only thing I would worry about with the 3" coax you have there is they only handle 10 watts and are only 86db with 1w/1m . That will limit your dynamic range and if you are going to run dolby digital they might come up a little short on power.

[mike1234]

... <A HREF="http://www.partsexpress.com/pe/showd...number=264-821">http://www.partsexpress.com/pe/showd...number=264-821</A> flanked (one each side) by these mini subs crossed at 200Hz... <A HREF="http://www.partsexpress.com/pe/showd...number=264-821">http://www.partsexpress.com/pe/showd...number=264-821</A> ??? This will keep the majority of sound point source while increasing power handling.

> Coax speakers work great for HT, I use
> 8" coax all around on my HT. The only
> thing I would worry about with the 3"
> coax you have there is they only handle 10
> watts and are only 86db with 1w/1m . That
> will limit your dynamic range and if you are
> going to run dolby digital they might come
> up a little short on power.

[biff]

> Is there anything wrong with using point
> source drivers for HT? Of course, these
> little 3" coaxials (link) will need
> bass reinforcement. One of these would sit
> nicely atop or underneath a TV.

Seas had several co-ax/co-incident driver setups available, and at one time I believe Dennis had a crossover for a P17 variant. Any of which should have much better output capability than the 3 or 4 inch co-ax.

[mike1234]

...except I'd really like to keep these as small (thin) as is possible.

> Seas had several co-ax/co-incident driver
> setups available, and at one time I believe
> Dennis had a crossover for a P17 variant.
> Any of which should have much better output
> capability than the 3 or 4 inch co-ax.

[robert]

> ...except I'd really like to keep these as
> small (thin) as is possible.

The 3's would definitely work, but you are looking at a crossover freq to the woofer/sub of around 200Hz to get reasonable volume capacity. I built a sort-of similar project last year using Wolf's "Rubyk" crossover, a buyout 3" woofer and a Dayton ND-16 tweeter. I think Ben's ND-16 design delivered higher quality highs than the TB balanced drive dome in these, though.

The drivers were pretty similar in area and max excursion. A single woofer would hit 94dB at max power/excursion with a 200Hz crossover point, and a bit higher if wall-mounted. At 250Hz, they would go to around 98dB. The sub really needs to be near front-center! These totally smoked you-know-who OK Bose!

The only issue is the tweeter and XO included, you are counting on them to get it right.

R/Robert

[denton]

Provided Link: Vifa coax


How about these from Apex?

[Soupy]

> Is there anything wrong with using point
> source drivers for HT? Of course, these
> little 3" coaxials (link) will need
> bass reinforcement. One of these would sit
> nicely atop or underneath a TV.

It'd take a few to handle any power effectively.

I like the Pioneer A11 for $10. Add a Sub.

Soupy

[ap]

> It'd take a few to handle any power
> effectively.

> I like the Pioneer A11 for $10. Add a Sub.

> Soupy

I'd check out the new Dayton reference 4" full-range, add another 5" for the bass. Andrew.

[mike1234]

...I might try using the 4's :-)

> The 3's would definitely work, but you are
> looking at a crossover freq to the
> woofer/sub of around 200Hz to get reasonable
> volume capacity. I built a sort-of similar
> project last year using Wolf's
> "Rubyk" crossover, a buyout
> 3" woofer and a Dayton ND-16 tweeter. I
> think Ben's ND-16 design delivered higher
> quality highs than the TB balanced drive
> dome in these, though.

> The drivers were pretty similar in area and
> max excursion. A single woofer would hit
> 94dB at max power/excursion with a 200Hz
> crossover point, and a bit higher if
> wall-mounted. At 250Hz, they would go to
> around 98dB. The sub really needs to be near
> front-center! These totally smoked
> you-know-who OK Bose!

> The only issue is the tweeter and XO
> included, you are counting on them to get it
> right.

> R/Robert

[mike1234]

...and the price is definitely attractive. Has anyone tested these? Any T/S info?

> How about these from Apex?

[mike1234]

You guys prefer full-range vs. coaxial? Please share your thoughts on this.

[Soupy]

> You guys prefer full-range vs. coaxial?
> Please share your thoughts on this.

... entirely on driver and intended use. Check the graphs. Some need a tweet to fill out the highs, the little Pio does fine IMO once broken in. I also like the Pio B20 and those work real well with little Dayton tweets and need them in my mind. Todd mentioned the new Dayton FR. I've read good reports on them as well but SPL is so low you definitely need an array to my thinking. Build reported to be excellent on those.

Soupy

[Soupy]

> I'd check out the new Dayton reference
> 4" full-range, add another 5" for
> the bass. Andrew.

Apologies Andrew - referred to you as Todd, was thinking of something he'd said.

Those do look nice but a bit pricy to me for that 83 SPL. I really like how small they are, an array of 9 would make an excellent HT front end, take near to no space and look cool as well. You're up to mid 90's then.

Soupy

[Soupy]

> Coax speakers work great for HT, I use
> 8" coax all around on my HT. The only
> thing I would worry about with the 3"
> coax you have there is they only handle 10
> watts and are only 86db with 1w/1m . That
> will limit your dynamic range and if you are
> going to run dolby digital they might come
> up a little short on power.

WLB -

Whose 8" are you using?

Thanks - Soupy

[Soupy]

> How about these from Apex?

I keep going back lookin at those as well. Nice price for a Vifa co-ax.

I see no discussion of them on the forums.

Soupy

[mike1234]

Provided Link: Pioneer 4&quot;


...build a cheapo WWT/MWW with the buyout Pioneer 4's I already have? (link) They're similar to the 4.5's mentioned earlier. I could run the center driver from 200-4K crossing to a little ND16 and use the flanking 4's to fill in the mid-bass below 200Hz. I have enough of the 4's to double the woofers if needed.

For HT, I'm not that critical of SQ. However, I do care about dynamic range for sonic impact during explosions, etc.

> ... entirely on driver and intended use.
> Check the graphs. Some need a tweet to fill
> out the highs, the little Pio does fine IMO
> once broken in. I also like the Pio B20 and
> those work real well with little Dayton
> tweets and need them in my mind. Todd
> mentioned the new Dayton FR. I've read good
> reports on them as well but SPL is so low
> you definitely need an array to my thinking.
> Build reported to be excellent on those.

> Soupy

[mike1234]