2way with CA18RNX or ER18RNX

kaiser38 · 29th July 2008, 03:51 PM

Hello,

I'm French. Here We can fin the SEAS products at a good price.

I saw a loudspeakers, ProAc 130. It seems to use a CA18 boomer and a vifa DX25 tweeter. It costs 1500â‚¬ (2000$) !

I saw the zaphaudio website, with the little SR17 with the ER18RNX and 27TDFC.

I would just build a similar speakers, but with a difference :

- I want a floorstanding speaker. Apparently, the ER18RNX (or CA18RNX) allows a 15 liters cabinet (little floorstanding)

And, is it a good idea to replace the 27TDFC by a 29TFF/W or better
T25CF001 ?

Lastly, somebody use ER or CA18RNX with a simple xover 6db, for example ?

Thanks a lot

Julien

tktran303 · 29th July 2008, 04:17 PM

Build the SR71 like the way it was designed. You can build a floorstanding with same internal dimensions, or slightly larger cabinet (16-20L) without degrading performance too much.

But the chosen crossover design and drivers are fixed. Don't change one or the other.

peter_m · 29th July 2008, 05:49 PM

What "tktran303" said!

Peter

kaiser38 · 29th July 2008, 06:07 PM

OK, excellent !

I think that i'll go to order the drivers and components !

What are the difference between the zaph audio design (little bookshield speakers) and a floorstanding with 15liters ?

More bass ? or not ?

kaiser38 · 29th July 2008, 06:07 PM

i dont' understand peter ...

Can I build a little floorstanding speakers for the SR71 or not ?

The question is simple !

thanks

sdclc126 · 29th July 2008, 07:16 PM

IMO any speaker can be a floorstander - just build it the height you want but keep the baffle width and internal volume the same.

P.S. - Regarding the T25CF001 Zaph says "Slightly expensive for what you get."

Dave Bullet · 29th July 2008, 08:05 PM

As softdome said.

Build the SR71 into a tower but use the same baffle width and tweeter and woofer offsets from the top / sides of the baffle. Design the height of the tower to place the tweeter on axis at listening height / seated position.

Keep internal volume the same by creating a false partition so that the bottom part of the tower becomes a dummy stand effectively, venting port on the top part. Baffle diffraction and step will not be affected significantly by a longer baffle.

Cheers,
David.

kaiser38 · 29th July 2008, 08:42 PM

OK

the madisound cabinet is 14 liters,

I'll try to design a floorstanding cabinet with approximatively the same size.

There is just a problem with the baffle step...

Anybody can help me ? Should I modify something in the crossover ?

I saw the website of J. KIM, he proposes another xover, but his version is very different...
I would prefer use the John "zaph" version...

Thanks a lot

jerome69 · 29th July 2008, 09:25 PM

Hello boy

Don't touch anything

, keep the design at is, building loudspeaker requires skill and tools.

If you want a floorstander just make the cabinet longer keeping the same width, depth and internal volume.

Andy G · 29th July 2008, 09:58 PM

I have nearly finalised a speaker using the ER18 and 27TDFC

http://members.optusnet.com.au/~grad...rrah_stand.jpg

It uses an AR series type of crossover (a different x-o again), which works beautifully.

29th July 2008, 03:51 PM	#1
kaiser38 diyAudio Member Join Date: Jul 2008	2way with CA18RNX or ER18RNX Hello, I'm French. Here We can fin the SEAS products at a good price. I saw a loudspeakers, ProAc 130. It seems to use a CA18 boomer and a vifa DX25 tweeter. It costs 1500â‚¬ (2000$) ! I saw the zaphaudio website, with the little SR17 with the ER18RNX and 27TDFC. I would just build a similar speakers, but with a difference : - I want a floorstanding speaker. Apparently, the ER18RNX (or CA18RNX) allows a 15 liters cabinet (little floorstanding) And, is it a good idea to replace the 27TDFC by a 29TFF/W or better T25CF001 ? Lastly, somebody use ER or CA18RNX with a simple xover 6db, for example ? Thanks a lot Julien __________________ Posted by a computer under Ubuntu Hardy Heron.

29th July 2008, 06:07 PM	#4
kaiser38 diyAudio Member Join Date: Jul 2008	OK, excellent ! I think that i'll go to order the drivers and components ! What are the difference between the zaph audio design (little bookshield speakers) and a floorstanding with 15liters ? More bass ? or not ? __________________ Posted by a computer under Ubuntu Hardy Heron.

29th July 2008, 06:07 PM	#5
kaiser38 diyAudio Member Join Date: Jul 2008	i dont' understand peter ... Can I build a little floorstanding speakers for the SR71 or not ? The question is simple ! thanks __________________ Posted by a computer under Ubuntu Hardy Heron.

29th July 2008, 07:16 PM	#6
sdclc126 diyAudio Member Join Date: Jan 2005 Location: San Diego, CA	IMO any speaker can be a floorstander - just build it the height you want but keep the baffle width and internal volume the same. P.S. - Regarding the T25CF001 Zaph says "Slightly expensive for what you get." __________________ Soft Dome

29th July 2008, 08:42 PM	#8
kaiser38 diyAudio Member Join Date: Jul 2008	OK the madisound cabinet is 14 liters, I'll try to design a floorstanding cabinet with approximatively the same size. There is just a problem with the baffle step... Anybody can help me ? Should I modify something in the crossover ? I saw the website of J. KIM, he proposes another xover, but his version is very different... I would prefer use the John "zaph" version... Thanks a lot __________________ Posted by a computer under Ubuntu Hardy Heron.


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

29th July 2008, 04:17 PM	#2
tktran303 diyAudio Member Join Date: Dec 2005 Location: Perth, WA	Build the SR71 like the way it was designed. You can build a floorstanding with same internal dimensions, or slightly larger cabinet (16-20L) without degrading performance too much. But the chosen crossover design and drivers are fixed. Don't change one or the other.

29th July 2008, 05:49 PM	#3
peter_m diyAudio Member Join Date: May 2007	What "tktran303" said! Peter

29th July 2008, 08:05 PM	#7
Dave Bullet diyAudio Member Join Date: Jan 2002 Location: Wellington, New Zealand	As softdome said. Build the SR71 into a tower but use the same baffle width and tweeter and woofer offsets from the top / sides of the baffle. Design the height of the tower to place the tweeter on axis at listening height / seated position. Keep internal volume the same by creating a false partition so that the bottom part of the tower becomes a dummy stand effectively, venting port on the top part. Baffle diffraction and step will not be affected significantly by a longer baffle. Cheers, David.

29th July 2008, 09:25 PM	#9
jerome69 diyAudio Member Join Date: Feb 2008 Location: Lyon	Hello boy Don't touch anything , keep the design at is, building loudspeaker requires skill and tools. If you want a floorstander just make the cabinet longer keeping the same width, depth and internal volume.

29th July 2008, 09:58 PM	#10
Andy G diyAudio Member Join Date: Apr 2002 Location: Newcastle, Australia	I have nearly finalised a speaker using the ER18 and 27TDFC http://members.optusnet.com.au/~grad...rrah_stand.jpg It uses an AR series type of crossover (a different x-o again), which works beautifully.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
SEAS ER18RNX / 27TBFCG MT 2-way: Listening impressions	Jay_WJ	Multi-Way	17	25th May 2008 08:03 PM
SR-71's Seas ER18RNX 7" woofer sold out at Madisound :( Other 2-way suggestions?	buttfacelicker	Multi-Way	39	17th April 2008 08:35 PM
ER18RNX in my Polks M10	License2ILL	Multi-Way	4	10th March 2008 12:31 PM
interested in MTM w/810921 and ER18RNX	natfin	Multi-Way	5	7th January 2008 01:18 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read