Full range speakers using EL70's - help.

Moonfly · 1st November 2012, 06:16 PM

Hi all,

I have a set of CSS EL70's that I got some time ago and for one reason or another never got round to using. Cut a long story short I used to have a bit of a setup that I had to sell due to moving country and now have nothing but this kit left to show for it. The kit comes with a set of tweeters as well.

I'm reasonably well up on sub design, but speakers not so much. I know some of the theory etc, but dont really have any detailed knowledge and whats best. I did come up with a design that basically was a copy of the Monitor Audio R270 speakers. I'll try upload some images of that when I have the ability to do so. I could do with some tips on what to do with this kit. My goal is to make a full range speaker that I can use to improve the sound from my tv and play a bit of music on. I know they wont be mind blowing, but they can better a TV.

The original design I had them in a 40 litre enclosure tuned to 40 or 50 hz, basically looking for about 50hz output at moderate levels. They would only take about 10 watts and manage about 90db at 50hz. The response doesnt look that flat either which may be a result of trying make them dig that bit deeper.

I could do with a bit of a speakers 101 crash course, or some helpful links. Any and all advice is most welcome.

Cheers

planet10 · 1st November 2012, 06:40 PM

A reflex that size for the EL70 is too large. As can be seen in the sims, your proposed design gives a pretty ugly response.

I feel that the optimal volume for the EL70 in a reflex box is around 13 litre. Quarter-wave designs (TLs) are required to take advantage of larger volumes.

There are MANY proven designs for the EL70, i would suggest going with a set of those. or at least look at them.

You can start here: Frugal-phile | Box Library / CSS

dave

chrisb · 1st November 2012, 06:56 PM

I've heard singles and duals of this model of driver in a multitude of enclosures - my 2 favorite bang for the buck for a single per side would have to be the FH3 (great if you have the floor space) or the cute little floorstander mahogany pair Dave has - whatever the heck they're called. ( it's not listed on the page Dave linked, so perhaps it's part of a subscription plan set?)

planet10 · 1st November 2012, 07:08 PM

Quote:

Originally Posted by chrisb

...or the cute little floorstander mahogany pair Dave has - whatever the heck they're called. ( it's not listed on the page Dave linked, so perhaps it's part of a subscription plan set?)

Mar-Kel70 Floorstander MkIII. Part of the paid plan-set

dave

Moonfly · 1st November 2012, 09:23 PM

Hi guys. Sorry, Ive no idea where 40 litres came from, my model is about 10 litres. I'll try get some more detailed info up tomorrow.

tuxedocivic · 2nd November 2012, 12:47 AM

Quote:

Originally Posted by Moonfly

I know they wont be mind blowing, but they can better a TV.

Sorry, but you're wrong. They will most definetely be mind blowing.

Moonfly · 2nd November 2012, 09:58 AM

Quote:

Originally Posted by tuxedocivic

Sorry, but you're wrong. They will most definetely be mind blowing.

Honestly? As good as the Monitor Audio speakers I mentioned (they were really impressive for their size and price).

Moonfly · 2nd November 2012, 10:11 AM

Some images of my proposed build, which also used the ERT26. Ive no idea where to really start with the crossover though.

tuxedocivic · 2nd November 2012, 02:36 PM

I've never heard those. I just find the EL70 mind blowing for what it is. I think you'll enjoy it

Moonfly · 2nd November 2012, 02:56 PM

You know, the kit has sat there for ages with me thinking that I'll probably be disappointed with the results and after my original goal for them didnt really happen, just kinda left them there doing nowt. Your comment has actually got me interested in doing something with them now. What about the model I made, does it look ok? What about some sort of crossover from the main driver and the tweeter, and should the crossover include a HPF as well?

I also got some crazy idea that I could disconnect my tv speakers and connect these directly to it, given they only want about 10 watts, but it was a passing thought that made me giggle. I did however come across some tiny amps that I thought I could maybe integrate into the speakers to make them active, then put something like maybe a DAC Magic on them. As you can tell, its a first foray into speaker building, and I'm pretty whet behind the ears.

1st November 2012, 06:16 PM	#1
Moonfly diyAudio Member Join Date: Oct 2012	Full range speakers using EL70's - help. Hi all, I have a set of CSS EL70's that I got some time ago and for one reason or another never got round to using. Cut a long story short I used to have a bit of a setup that I had to sell due to moving country and now have nothing but this kit left to show for it. The kit comes with a set of tweeters as well. I'm reasonably well up on sub design, but speakers not so much. I know some of the theory etc, but dont really have any detailed knowledge and whats best. I did come up with a design that basically was a copy of the Monitor Audio R270 speakers. I'll try upload some images of that when I have the ability to do so. I could do with some tips on what to do with this kit. My goal is to make a full range speaker that I can use to improve the sound from my tv and play a bit of music on. I know they wont be mind blowing, but they can better a TV. The original design I had them in a 40 litre enclosure tuned to 40 or 50 hz, basically looking for about 50hz output at moderate levels. They would only take about 10 watts and manage about 90db at 50hz. The response doesnt look that flat either which may be a result of trying make them dig that bit deeper. I could do with a bit of a speakers 101 crash course, or some helpful links. Any and all advice is most welcome. Cheers

1st November 2012, 06:56 PM	#3
chrisb diyAudio Member Join Date: Aug 2002 Location: victoria BC	I've heard singles and duals of this model of driver in a multitude of enclosures - my 2 favorite bang for the buck for a single per side would have to be the FH3 (great if you have the floor space) or the cute little floorstander mahogany pair Dave has - whatever the heck they're called. ( it's not listed on the page Dave linked, so perhaps it's part of a subscription plan set?) __________________ you don't really believe everything you think, do you? community sites t-linespeakers.org, frugal-horn.com commercial site planet10-HiFi

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
Full range speakers for boombox	jazd	Full Range	33	30th March 2011 10:43 PM
Full range speakers the way to go?	dave123456@mail	Full Range	7	29th December 2008 07:51 PM
Frequency range of the human voice & full range center channel speakers	jwmbro	Multi-Way	31	20th January 2008 03:07 PM
what are full range speakers?	legendaryfrog	Full Range	10	10th November 2006 01:35 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


	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

1st November 2012, 09:23 PM	#5
Moonfly diyAudio Member Join Date: Oct 2012	Hi guys. Sorry, Ive no idea where 40 litres came from, my model is about 10 litres. I'll try get some more detailed info up tomorrow.

2nd November 2012, 02:36 PM	#9
tuxedocivic diyAudio Member Join Date: Jan 2011 Location: Ladysmith, BC	I've never heard those. I just find the EL70 mind blowing for what it is. I think you'll enjoy it

2nd November 2012, 02:56 PM	#10
Moonfly diyAudio Member Join Date: Oct 2012	You know, the kit has sat there for ages with me thinking that I'll probably be disappointed with the results and after my original goal for them didnt really happen, just kinda left them there doing nowt. Your comment has actually got me interested in doing something with them now. What about the model I made, does it look ok? What about some sort of crossover from the main driver and the tweeter, and should the crossover include a HPF as well? I also got some crazy idea that I could disconnect my tv speakers and connect these directly to it, given they only want about 10 watts, but it was a passing thought that made me giggle. I did however come across some tiny amps that I thought I could maybe integrate into the speakers to make them active, then put something like maybe a DAC Magic on them. As you can tell, its a first foray into speaker building, and I'm pretty whet behind the ears.