2x Seas L21RNX/P + RS52: Good combination?

Spasticteapot · 29th July 2008, 02:57 PM

Recent scrounging has allowed me to procure three mates for my madisound-special Seas L21RNX/P. I'd like to build a three-way active speaker (probably using a DCX2496) using these woofers plus a Dayton RS52 mid and a Hi-Vi RT1-II speaker.

My question is to whether these would be suitable for use with the RS52. Due to the limited number of channels on the DCX2496, I can't equalize the lower woofer differently for a 3.5-way configuration. Is there a configuration for these woofers that will give me really good off-axis performance (+/- 3db at 40 degrees) crossed over at 600-700hz?

sreten · 29th July 2008, 05:12 PM

Hi,

I'd suggest a passive c/o RS52 to the HiVi tweeter.
More amplifier channels effective.
Then 3 channels including a 0.5 way channel.

/sreten.

Spasticteapot · 29th July 2008, 05:17 PM

Quote:

Originally posted by sreten
Hi,

I'd suggest a passive c/o RS52 to the HiVi tweeter.
More amplifier channels effective.
Then 3 channels including a 0.5 way channel.

/sreten.

Were that a possibility, I'd use a pair of subs.

Dave Bullet · 29th July 2008, 08:07 PM

Zaphs ZDT3 crosses the RS52 at 800Hz with 2nd order acoustic slopes. I think 600Hz may require steeper slopes, as the RS52 may run out of xmax before the dual P21s. Take a look at his comments on the RS52 on the ZDT3

Cheers,
David.

Spasticteapot · 29th July 2008, 08:10 PM

Quote:

Originally posted by Dave Bullet
Zaphs ZDT3 crosses the RS52 at 800Hz with 2nd order acoustic slopes. I think 600Hz may require steeper slopes, as the RS52 may run out of xmax before the dual P21s. Take a look at his comments on the RS52 on the ZDT3

Cheers,
David.

The DCX2496 will allow 8th-order slopes, so I think that won't be a problem. Many people use the L21s to 1.5khz, so the question is not one of frequency response but dispersion.

Jay_WJ · 30th July 2008, 04:09 AM

How will you be sure that you obtain desired acoustic phase tracking between drivers when you use pre-determined eletrical filter slopes? You will need to perform careful simulations using drivers' frequency responses.

29th July 2008, 02:57 PM	#1
Spasticteapot diyAudio Member Join Date: Jan 2006 Location: Wisconsin....what did you expect?	2x Seas L21RNX/P + RS52: Good combination? Recent scrounging has allowed me to procure three mates for my madisound-special Seas L21RNX/P. I'd like to build a three-way active speaker (probably using a DCX2496) using these woofers plus a Dayton RS52 mid and a Hi-Vi RT1-II speaker. My question is to whether these would be suitable for use with the RS52. Due to the limited number of channels on the DCX2496, I can't equalize the lower woofer differently for a 3.5-way configuration. Is there a configuration for these woofers that will give me really good off-axis performance (+/- 3db at 40 degrees) crossed over at 600-700hz?

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29th July 2008, 05:12 PM	#2
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	Hi, I'd suggest a passive c/o RS52 to the HiVi tweeter. More amplifier channels effective. Then 3 channels including a 0.5 way channel. /sreten.

29th July 2008, 08:07 PM	#4
Dave Bullet diyAudio Member Join Date: Jan 2002 Location: Wellington, New Zealand	Zaphs ZDT3 crosses the RS52 at 800Hz with 2nd order acoustic slopes. I think 600Hz may require steeper slopes, as the RS52 may run out of xmax before the dual P21s. Take a look at his comments on the RS52 on the ZDT3 Cheers, David.

30th July 2008, 04:09 AM	#6
Jay_WJ diyAudio Member Join Date: Mar 2006 Location: Indiana	How will you be sure that you obtain desired acoustic phase tracking between drivers when you use pre-determined eletrical filter slopes? You will need to perform careful simulations using drivers' frequency responses.

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