Scan-Speak 15M4531k00

Virtalahde · 8th May 2007, 11:22 AM

I tried searching, but I see surprisingly little input on this midrange..

My main question is: Is the lower midrange/upper bass comparable to the 15W8530, provided you don't exceed the low xmax of the driver? I'm talking about ranges 150Hz - 300Hz or so. And how about the lower treble?

This driver seems like a very good midrange for 3-ways to me. I suppose it misses the coating, at least based on the photos I've seen, compared to 15W's.

Tenson · 8th May 2007, 01:32 PM

It should certainly manage 150Hz Xover if it is in a sealed enclosure. Even easier if it was a sealed enclosure plus an electrical filter.

Virtalahde · 17th May 2007, 08:27 PM

Oh, I forgot to answer.

Sorry!

Thanks for the input. I've been doing some more searching, and I've found similar comments. I indeed had in mind to use an active cross-over and a sealed enclosure, not to mention MTM layout. 2nd order HP for acoustic LR4. Maybe even higher if that's what sounds good with SS 8565-01's.

I also found comments of this driver being very fast & transient, suits me.

tinitus · 17th May 2007, 11:53 PM

With a small series inductor(0.3mH ?) with RC and additional "notch" filter you will get very nice sound

150hz is ok at low levels - but at higher level I reckon it will move a lot, and in my book a midrange shouldnt move much, at least not visuably ... which I think is in the nature and advantage of a midrange

Furthermore, 150hz is right in the middle of the baffle step loss

but it might work with a little overlap from the woofers

Will you use double 10"(8565) to match the double 15M

tinitus · 18th May 2007, 03:01 AM

You say MTM - the ScSp 15M is a 4ohm driver

Virtalahde · 18th May 2007, 05:00 AM

Yup, double 8565 in a closed cabinet.

Most likely it's gonna be WMTMW, since the QTC I'm aiming for is below 0.6, and with MTMWW the bottom cabinet would grow enormously big. A WMTMW gives a possibility for a taller but slimmer cabinet. Not to mention symmetrical radiation.

Form follows function, anyone?

150hz for 15M4531 is kinda low, but I'm going to try it anyway. The idea came from Barefoot Sound MM27's (http://www.barefootsound.com/) . 110Hz - 2k5 xovers with (probably) Vifa 5" midranges. Those who have heard it say it works wonderfully.

Another good option would be to use the 2x10's for BSC. I wouldn't want to take them much above 250Hz though..

It's going to be all active (analog) cross-overs. Notch filters no problem. They're 4ohm drivers allright, so why don't I just hook them up in series?

8th May 2007, 11:22 AM	#1
Virtalahde diyAudio Member Join Date: Jan 2006 Location: Kuhmoinen, Finland	Scan-Speak 15M4531k00 I tried searching, but I see surprisingly little input on this midrange.. My main question is: Is the lower midrange/upper bass comparable to the 15W8530, provided you don't exceed the low xmax of the driver? I'm talking about ranges 150Hz - 300Hz or so. And how about the lower treble? This driver seems like a very good midrange for 3-ways to me. I suppose it misses the coating, at least based on the photos I've seen, compared to 15W's.

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8th May 2007, 01:32 PM	#2
Tenson diyAudio Member Join Date: Feb 2006 Location: Kent	It should certainly manage 150Hz Xover if it is in a sealed enclosure. Even easier if it was a sealed enclosure plus an electrical filter.

17th May 2007, 08:27 PM	#3
Virtalahde diyAudio Member Join Date: Jan 2006 Location: Kuhmoinen, Finland	Oh, I forgot to answer. Sorry! Thanks for the input. I've been doing some more searching, and I've found similar comments. I indeed had in mind to use an active cross-over and a sealed enclosure, not to mention MTM layout. 2nd order HP for acoustic LR4. Maybe even higher if that's what sounds good with SS 8565-01's. I also found comments of this driver being very fast & transient, suits me.

17th May 2007, 11:53 PM	#4
tinitus diyAudio Moderator Join Date: Nov 2005	With a small series inductor(0.3mH ?) with RC and additional "notch" filter you will get very nice sound 150hz is ok at low levels - but at higher level I reckon it will move a lot, and in my book a midrange shouldnt move much, at least not visuably ... which I think is in the nature and advantage of a midrange Furthermore, 150hz is right in the middle of the baffle step loss but it might work with a little overlap from the woofers Will you use double 10"(8565) to match the double 15M

18th May 2007, 03:01 AM	#5
tinitus diyAudio Moderator Join Date: Nov 2005	You say MTM - the ScSp 15M is a 4ohm driver

18th May 2007, 05:00 AM	#6
Virtalahde diyAudio Member Join Date: Jan 2006 Location: Kuhmoinen, Finland	Yup, double 8565 in a closed cabinet. Most likely it's gonna be WMTMW, since the QTC I'm aiming for is below 0.6, and with MTMWW the bottom cabinet would grow enormously big. A WMTMW gives a possibility for a taller but slimmer cabinet. Not to mention symmetrical radiation. Form follows function, anyone? 150hz for 15M4531 is kinda low, but I'm going to try it anyway. The idea came from Barefoot Sound MM27's (http://www.barefootsound.com/) . 110Hz - 2k5 xovers with (probably) Vifa 5" midranges. Those who have heard it say it works wonderfully. Another good option would be to use the 2x10's for BSC. I wouldn't want to take them much above 250Hz though.. It's going to be all active (analog) cross-overs. Notch filters no problem. They're 4ohm drivers allright, so why don't I just hook them up in series?

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