What you think of these Scan Speak ideas...?

[harrisni]

Hi,

I am looking to create Fronts, Rears, Centre and a Subwoofer using the following drivers.

What do you guys think of these combo's?

All Scanspeak drivers

Fronts:

Tweeter: R2904-700000 or D2905-990000
Midrange: 15M4531K00
Midwoofer: 18W8531G00
Woofer: 26W/8861T00 or 26W/8867T00

*Front design something similier to: http://www.gattiweb.com/images/delta...n/drawing2.jpg

Rears:

Tweeter: R2904-700000 or D2905-990000
Midrange: 15M4531K00 or Midwoofer: 18W8531G00

Centre:

Tweeter: R2904-700000 or D2905-990000
Midrange: 15M4531K00
Midwoofer: 18W8531G00 (2)

Subwoofer:

Not sure yet, but probally a peerless XXLS 10 or 12"

Thanks in advance for any advice/comments

[JC Fardo]

Hi Nick

Tell us about your listening tastes, if music only or Home Theater and your listening room size. First impressions seems that Gatti´s design calls for a huge and dedicated room.

Cheers.

[FullThrottleRic]

That's some serious money in drivers

The front's you're looking to build are along the lines of what I'm about to start, change the mid for a 12M/4631G00 and you have an Ekta.

I'm planning on using the same drivers, baffle layout and crossovers but putting the 18W in a sealed box and adding an (active) larger driver to cover the bottom couple of octaves. Depending on how this turns out I'd like to try an active crossover between the 12m and 18w and doing BSC with a line level filter instead of the attenuating resistors to give the amps a bit more clipping headroom. The only problem I'm having is finding a reasonable quality 10-12" woofer that will goto 30Hz in a sealed 30L enclosure, the TC Sounds woofers are very nice (my sub is equipped with one) but their senstivity is terrible and I'll need to build some bigger amps to use them.

What space requirements do you have for the centre speaker? Idealy if you can accomodate it you want it to be the same as the fronts, otherwise you might have problems getting it to match the bass/output ability of the fronts if it only has 2x 7" woofers.

I wouldn't waste your money on the 7000 tweeters for your rears, you'd be better off using a couple of cheaper tweeters and make yourself some dipoles'. Sticking to smaller midwoofers is better for dipole rears as they beam less, a lower than normal crossover can help with this too. With cheaper tweeters in the rears then you could afford something like....

This monster for your subwoofer

[Tenson]

The whole thing seems way too complex to me. I'd use a 3 way for the fronts and a 2 way for the rears. Maybe a pro woofer for the sub.

[harrisni]

Originally posted by JC Fardo
Hi Nick

Tell us about your listening tastes, if music only or Home Theater and your listening room size. First impressions seems that Gatti´s design calls for a huge and dedicated room.

Cheers.

Hi,

I would say 90% HT use and 10% Music. The room size, Im not really sure on as at the moment Im doing some remodelling in the house. I would probally say about 6mx8m.

I suppose one thing is for the fronts does it require a mid-woofer if you have a mid-range and a woofer?

[harrisni]

Originally posted by FullThrottleRic
That's some serious money in drivers

The front's you're looking to build are along the lines of what I'm about to start, change the mid for a 12M/4631G00 and you have an Ekta.

I'm planning on using the same drivers, baffle layout and crossovers but putting the 18W in a sealed box and adding an (active) larger driver to cover the bottom couple of octaves. Depending on how this turns out I'd like to try an active crossover between the 12m and 18w and doing BSC with a line level filter instead of the attenuating resistors to give the amps a bit more clipping headroom. The only problem I'm having is finding a reasonable quality 10-12" woofer that will goto 30Hz in a sealed 30L enclosure, the TC Sounds woofers are very nice (my sub is equipped with one) but their senstivity is terrible and I'll need to build some bigger amps to use them.

What space requirements do you have for the centre speaker? Idealy if you can accomodate it you want it to be the same as the fronts, otherwise you might have problems getting it to match the bass/output ability of the fronts if it only has 2x 7" woofers.

I wouldn't waste your money on the 7000 tweeters for your rears, you'd be better off using a couple of cheaper tweeters and make yourself some dipoles'. Sticking to smaller midwoofers is better for dipole rears as they beam less, a lower than normal crossover can help with this too. With cheaper tweeters in the rears then you could afford something like....

This monster for your subwoofer

Hi,

The Ekta looks good. Who designed it?

I would prefer to use the 15M instead of the 12M. I see this design doesn't have a requirement for an actual woofer.

I suppose the 18W could be replaced with a woofer...????

As for the centre, I have no limitation on the size. I was thinking of using Tweeter, Midrange and 2 Midwoofers. It would be quite large, but might be able to swing the design using the Tweeter mounted above the Midrange in the centre and the 2 Midwoofers on either side.

Ive never heard the TC Sounds subwoofers before.

What tweeter are you going to use? Are you just doing a 3way?

[harrisni]

Originally posted by Tenson
The whole thing seems way too complex to me. I'd use a 3 way for the fronts and a 2 way for the rears. Maybe a pro woofer for the sub.

True, I don't want it to be so complex otherwise it defeats the purpose.

What would you use then for the 3 way and 2 way (From my driver list)

[tinitus]

"EKTA, who designed it...."

http://www.troelsgravesen.dk/Diy_Lou...r_Projects.htm


BTW.... someone once told me that if you want a good coherent surround setup, then "all" speakers should be alike and have the same crossover

[JC Fardo]

Originally posted by tinitus
"EKTA, who designed it...."

http://www.troelsgravesen.dk/Diy_Lou...r_Projects.htm


BTW.... someone once told me that if you want a good coherent surround setup, then "all" speakers should be alike and have the same crossover

Agree. Start with a set of 5 EllamXT instead and a 12" comercial powered sub.

http://www.troelsgravesen.dk/EllamXT.htm

You´ll be amazed with results and money saved

Good luck, happy new year

[RobWells]

A single sub seems way undersized for a room that size - If your spending all that money at least look at 4 of the xxls's

Think about how you're going to implement bass management for the speakers - If you plan to cross the rears at 80Hz then they'll need an F-3 in the 80Hz ballpark, making multiple smaller drivers more useful than bigger drivers. Same with fronts - I'd be looking at a 40Hz xo point, so would design the box to roll off around there.

fwiw I used to use 3 way scans - 9900 revelator tweeters/ 8535 k00 mids and 2x8565-01 10's per side. The tweeters and bass units were excellent sounding.

Rob.