Scan Speak 23W sub

Pan · 15th February 2005, 09:29 PM

Anyone used Scan Speak 23W?

I have a pair to play around with and would like some input. The only commercial sub I´ve seen using this driver is the one from Acoustic Reality which uses one driver and two passive radiators. I was thinking on closed box used near corner to get boost and use DSP.

/Peter

DaHos · 16th February 2005, 01:35 AM

Must be nice....While you are "playing around" could you throw one in a 1 ft^3 and a 2 ft^3 sealed box and let me know the results....

Pan · 16th February 2005, 09:39 AM

Yup, will do. Those are the alignments I´ve been thinking on primarly. Will probably start out with the smaller to see if room gain produce good results without EQ initially.

/Peter

Pan · 22nd February 2005, 01:46 PM

Input anyone?

/Peter

cbecker33 · 22nd February 2005, 02:37 PM

A brief thread hijack........

Peter,

Have you dealt with Acoustic Reality? I'm looking to purchase an amplifier, but have read some interesting things about service.

thanks (and sorry),

-chris

Pan · 22nd February 2005, 02:43 PM

I have not made any business with them but I have read the same things as you.

Guess it would be worth it anyway since the ICE amps are so reliable and of such high quality... and at such low price it´s hard to resist.

/Peter

paulspencer · 22nd February 2005, 03:31 PM

I have no experience with this woofer, but have heard good things about it, and have seen it in a few projects.

Actually, the 25W ... not the 23

Stig Erik Tangen on Speakerbuilding.com:
http://www.speakerbuilding.com/content/1013/page_4.php

Pan · 22nd February 2005, 03:36 PM

The 25W is old and sold.

Now they have the 26W and 23W as the bigger revelator woofers. The 23W is a little monster sub with alu-cone and Ti former.

Time will show if it´s just a cool looking beefy driver or if it has good performance as well.

/Peter

Vigier · 22nd February 2005, 06:20 PM

Hi,

I have a test here in the German magazine "HobbyHifi".
It's a test with the Scan Speak 23W/4557T00 and the Visaton TIW250XS.

Just a few things about the 23W:
- (almost) flat up to 1kHz.
- 15 dB peak at 6.5 kHz
- 3rd order harmonics from 100 Hz to 1kHz at about 0,1% at 90dB
- 5th order harmonics from 100 Hz to 1kHz everywhere lower than 0,03% at 90dB
- very low sensitivity at 79dB/1W/1m in low-frequency range. (about 85/86 dB is normal for woofers. DON'T compare it to the sensitivity at a few 100 Hz that is usually given)
- it goes LOWWWWW.... : reflex: 63 liter, tuned to 17 Hz with a 60mm diameter tunnel, 440mm long gives a -3 dB of 14 Hz.
Closed in 18 liter, with a 2.000µF capacitor in series gives a -3dB of 25 Hz.

Hope this gives you an impression?

Grtz, Joris

Pan · 22nd February 2005, 07:19 PM

Thanks Joriz!

Respons and sensitivity I have seen on d-s-t.com but the
low distortion was good news and what I hoped for. Question is how it perform down lower in range and esecially with some power.

That 18lit/2000uF sounds almost to good to be true. I ran some simulations and at less than 25 lit the Q started to be a little high and peaky.

Reflex loaded could be very fun but question is how that small port would cope with air flow.

No 2nd harmonic or anything below 100Hz?

Thanks very much!

/Peter

15th February 2005, 09:29 PM	#1
Pan diyAudio Member Join Date: Sep 2002	Scan Speak 23W sub Anyone used Scan Speak 23W? I have a pair to play around with and would like some input. The only commercial sub I´ve seen using this driver is the one from Acoustic Reality which uses one driver and two passive radiators. I was thinking on closed box used near corner to get boost and use DSP. /Peter

22nd February 2005, 03:31 PM	#7
paulspencer diyAudio Member Join Date: Sep 2003 Location: Melbourne, Australia	I have no experience with this woofer, but have heard good things about it, and have seen it in a few projects. Actually, the 25W ... not the 23 Stig Erik Tangen on Speakerbuilding.com: http://www.speakerbuilding.com/content/1013/page_4.php __________________ Red Spade Audio Blog \| Writer for: Hifi Zine S3 Synergy horn + 18" active woofers + T20 horn sub + B&C active surrounds + Custom Acoustic Treatment

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16th February 2005, 01:35 AM	#2
DaHos diyAudio Member Join Date: Mar 2004 Location: Central Michigan	Must be nice....While you are "playing around" could you throw one in a 1 ft^3 and a 2 ft^3 sealed box and let me know the results....

16th February 2005, 09:39 AM	#3
Pan diyAudio Member Join Date: Sep 2002	Yup, will do. Those are the alignments I´ve been thinking on primarly. Will probably start out with the smaller to see if room gain produce good results without EQ initially. /Peter

22nd February 2005, 01:46 PM	#4
Pan diyAudio Member Join Date: Sep 2002	Input anyone? /Peter

22nd February 2005, 02:37 PM	#5
cbecker33 diyAudio Member Join Date: Sep 2004 Location: stl	A brief thread hijack........ Peter, Have you dealt with Acoustic Reality? I'm looking to purchase an amplifier, but have read some interesting things about service. thanks (and sorry), -chris

22nd February 2005, 02:43 PM	#6
Pan diyAudio Member Join Date: Sep 2002	I have not made any business with them but I have read the same things as you. Guess it would be worth it anyway since the ICE amps are so reliable and of such high quality... and at such low price it´s hard to resist. /Peter

22nd February 2005, 03:36 PM	#8
Pan diyAudio Member Join Date: Sep 2002	The 25W is old and sold. Now they have the 26W and 23W as the bigger revelator woofers. The 23W is a little monster sub with alu-cone and Ti former. Time will show if it´s just a cool looking beefy driver or if it has good performance as well. /Peter

22nd February 2005, 06:20 PM	#9
Vigier diyAudio Member Join Date: Nov 2002 Location: Netherlands	Hi, I have a test here in the German magazine "HobbyHifi". It's a test with the Scan Speak 23W/4557T00 and the Visaton TIW250XS. Just a few things about the 23W: - (almost) flat up to 1kHz. - 15 dB peak at 6.5 kHz - 3rd order harmonics from 100 Hz to 1kHz at about 0,1% at 90dB - 5th order harmonics from 100 Hz to 1kHz everywhere lower than 0,03% at 90dB - very low sensitivity at 79dB/1W/1m in low-frequency range. (about 85/86 dB is normal for woofers. DON'T compare it to the sensitivity at a few 100 Hz that is usually given) - it goes LOWWWWW.... : reflex: 63 liter, tuned to 17 Hz with a 60mm diameter tunnel, 440mm long gives a -3 dB of 14 Hz. Closed in 18 liter, with a 2.000µF capacitor in series gives a -3dB of 25 Hz. Hope this gives you an impression? Grtz, Joris

22nd February 2005, 07:19 PM	#10
Pan diyAudio Member Join Date: Sep 2002	Thanks Joriz! Respons and sensitivity I have seen on d-s-t.com but the low distortion was good news and what I hoped for. Question is how it perform down lower in range and esecially with some power. That 18lit/2000uF sounds almost to good to be true. I ran some simulations and at less than 25 lit the Q started to be a little high and peaky. Reflex loaded could be very fun but question is how that small port would cope with air flow. No 2nd harmonic or anything below 100Hz? Thanks very much! /Peter