high efficiency speakers for 2A3

moo · 5th February 2006, 04:04 PM

Hi,

I would like to build a pair of high efficiency floor standing speakers. The amplifier is Sun Audio SV2A3. I have used this amp with a pair of old JM Lab speakers (94db sensitivity) with superb results and I have friends using the same amp with less sensitive speakers namely Infinity Primus 360 with no signs of stress at all. So I’d say anything with 92db and above sensitivity is ok for me. The speakers should go as low as 30Hz, is this too much to ask? The use of subwoofer is not an option in my set-up.

I listen to mainstream jazz, pop, rock, world, metal. I like nuances, thumping/fast mid bass and extended low bass, especially when I spin Portishead.

My listening room size is 10’ (W) x 16’ (D) x 7.5’ (H), solid side and back walls.

I am open to any suggestion but I tend to prefer/used to the sound of bass reflex speakers. Since I reside in London now, shipping components from outside of EU will cost me more and take longer, but I’m willing to take the plunge if it’s worth while.

Tentatively I’m setting my budget at GBP300/USD530/EUR450 (components and shipping), but excluding cost of the cabinet as I have access to table saws, cnc router and other tools, and I already have 2 pieces of 1” thick 3’x 8’ birch ply, no problem getting more if necessary, and I’m addicted to soldering fume.

Thanks in advance for your input.

Regards,
Moo.

P/S is the London Live DIY HiFi Circle still active?

sreten · 6th February 2006, 08:58 AM

http://speakerbuilder.net/web_files/...oject/eros.htm

http://speakerbuilder.net/web_files/...ct/erosmk2.htm

Generally you can't have >90dB/w and <30Hz bass in a reasonably
sized floor standing speaker. Though something approaching this
is possible if you carefully utilise room gain and go for an extended
overdamped reflex alignment.

/sreten.

Edit : a design with more recent drivers

http://www.zaphaudio.com/audio-speaker16.html

the floorstanding version.

el`Ol · 6th February 2006, 01:55 PM

Here are some speakers that have Fs<30Hz and sensitivity 95dB.
http://www.sibatech.co.jp/FAL/SystemCat.pdf

sreten · 6th February 2006, 02:00 PM

Quote:

Originally posted by el`Ol
Here are some speakers that have Fs<30Hz and sensitivity 95dB.
http://www.sibatech.co.jp/FAL/SystemCat.pdf

I did say in a reasonable sized speaker. 1.3mx0.6mx0.5m is not reasonable.

/sreten.

el`Ol · 6th February 2006, 03:26 PM

FS have an AER modification with 99.5dB sensitivity and Fs 29Hz. Vas isn`t really small, but reasonable size is a matter of definition.
http://www.fullrange-speakers.com/5v...md2Btech-e.htm

el`Ol · 7th February 2006, 04:20 AM

If unreasonable size is an option you could use 38cm woofers from Altec-Lansing, Fertin, and probably some others.

moo · 7th February 2006, 06:34 AM

unreasonable size is an option and no WAF to worry about. was considering speakers like Altec, TAD, etc. but aren't these hard to come by? besides, they're definately over my budget, right?

would it be wise in my case to spend all my money on the drivers and build OB as:
a)saving on component (no crossover, no extra wood needed)
b)high sensitivity easily achieved

but then again will i get the sound that i like with OB, or even close?

thank you for your input and feel free to keep them coming. i will process the information and report back.

moo.

sreten · 7th February 2006, 09:43 AM

Quote:

Originally posted by moo

but then again will i get the sound that i like with OB, or even close?
moo.

Hi,

I can't really comment. Most high efficiency designs I've seen are flawed.

http://store.hifiauthority.com/olsherkits.html

the Basszilla seems much more thought out than most.

But ~ double the budget.

/sreten.

el`Ol · 7th February 2006, 10:07 AM

Hello moo!

Of course this is all far above your budget.

With large frontloaded basshorns like Klipsch-style edge horns or Cerwin-Vega-style folded horns you can get the desired sensitivity and Fs with quite normal drivers (low Qts), but forget BR, sealed, or OB.
Crossover would be around 200 and above it a fullranger or professional coaxial, if you like compression drivers. If you REALLY like compression drivers you could do everything above 250Hz with BMS coaxial compression drivers.

greets, Oliver

el`Ol · 22nd February 2006, 06:07 AM

The Goodmans Axiom 301 in backloaded corner horns should also do the job. You would just need a supertweeter.

http://cgi.ebay.de/ws/eBayISAPI.dll?...e=STRK:MEWA:IT

5th February 2006, 04:04 PM	#1
moo diyAudio Member Join Date: Jun 2004 Location: london	high efficiency speakers for 2A3 Hi, I would like to build a pair of high efficiency floor standing speakers. The amplifier is Sun Audio SV2A3. I have used this amp with a pair of old JM Lab speakers (94db sensitivity) with superb results and I have friends using the same amp with less sensitive speakers namely Infinity Primus 360 with no signs of stress at all. So I’d say anything with 92db and above sensitivity is ok for me. The speakers should go as low as 30Hz, is this too much to ask? The use of subwoofer is not an option in my set-up. I listen to mainstream jazz, pop, rock, world, metal. I like nuances, thumping/fast mid bass and extended low bass, especially when I spin Portishead. My listening room size is 10’ (W) x 16’ (D) x 7.5’ (H), solid side and back walls. I am open to any suggestion but I tend to prefer/used to the sound of bass reflex speakers. Since I reside in London now, shipping components from outside of EU will cost me more and take longer, but I’m willing to take the plunge if it’s worth while. Tentatively I’m setting my budget at GBP300/USD530/EUR450 (components and shipping), but excluding cost of the cabinet as I have access to table saws, cnc router and other tools, and I already have 2 pieces of 1” thick 3’x 8’ birch ply, no problem getting more if necessary, and I’m addicted to soldering fume. Thanks in advance for your input. Regards, Moo. P/S is the London Live DIY HiFi Circle still active?

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6th February 2006, 08:58 AM	#2
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	http://speakerbuilder.net/web_files/...oject/eros.htm http://speakerbuilder.net/web_files/...ct/erosmk2.htm Generally you can't have >90dB/w and <30Hz bass in a reasonably sized floor standing speaker. Though something approaching this is possible if you carefully utilise room gain and go for an extended overdamped reflex alignment. /sreten. Edit : a design with more recent drivers http://www.zaphaudio.com/audio-speaker16.html the floorstanding version.

6th February 2006, 01:55 PM	#3
el`Ol diyAudio Member Join Date: May 2005 Location: Bavarian Forest	Here are some speakers that have Fs<30Hz and sensitivity 95dB. http://www.sibatech.co.jp/FAL/SystemCat.pdf

6th February 2006, 03:26 PM	#5
el`Ol diyAudio Member Join Date: May 2005 Location: Bavarian Forest	FS have an AER modification with 99.5dB sensitivity and Fs 29Hz. Vas isn`t really small, but reasonable size is a matter of definition. http://www.fullrange-speakers.com/5v...md2Btech-e.htm

7th February 2006, 04:20 AM	#6
el`Ol diyAudio Member Join Date: May 2005 Location: Bavarian Forest	If unreasonable size is an option you could use 38cm woofers from Altec-Lansing, Fertin, and probably some others.

7th February 2006, 06:34 AM	#7
moo diyAudio Member Join Date: Jun 2004 Location: london	unreasonable size is an option and no WAF to worry about. was considering speakers like Altec, TAD, etc. but aren't these hard to come by? besides, they're definately over my budget, right? would it be wise in my case to spend all my money on the drivers and build OB as: a)saving on component (no crossover, no extra wood needed) b)high sensitivity easily achieved but then again will i get the sound that i like with OB, or even close? thank you for your input and feel free to keep them coming. i will process the information and report back. moo.

7th February 2006, 10:07 AM	#9
el`Ol diyAudio Member Join Date: May 2005 Location: Bavarian Forest	Hello moo! Of course this is all far above your budget. With large frontloaded basshorns like Klipsch-style edge horns or Cerwin-Vega-style folded horns you can get the desired sensitivity and Fs with quite normal drivers (low Qts), but forget BR, sealed, or OB. Crossover would be around 200 and above it a fullranger or professional coaxial, if you like compression drivers. If you REALLY like compression drivers you could do everything above 250Hz with BMS coaxial compression drivers. greets, Oliver

22nd February 2006, 06:07 AM	#10
el`Ol diyAudio Member Join Date: May 2005 Location: Bavarian Forest	The Goodmans Axiom 301 in backloaded corner horns should also do the job. You would just need a supertweeter. http://cgi.ebay.de/ws/eBayISAPI.dll?...e=STRK:MEWA:IT