Mtm Dipole Question

trusound · 26th January 2006, 07:33 PM

Starting next weekend I'm starting a MTM dipole using the SEAS W18's and Hiquphon OW1F's... temporally i plan on using the Rane RPM26Z for the processor until I can afford the DEQX..

My question is..would it be wise to dedicate a channel of processing and a channel of amplification to each W18? or can I get away with keep both drivers on the same channel?

thanks guys

rick57 · 26th January 2006, 08:06 PM

Hi

Use the same processing on both Seas.
Re amps - see the Phoenix FAQ at www.linkwitzlab.com (Q&A on both ohms & watts).

It’s not easy designing a first dipole. To get a better result, read Linkwitz material at *least twice –he’s the guru

Cheers

DougL · 27th January 2006, 01:48 AM

Just my personal opinion, but I think that really depends on how well your amp can handle the drivers minimum impedance.
I don't see any down side to 1 amp per speaker, I crossover port per amp if you aren't compromising elsewhere to do it.

Good luck, sounds like a fun project,

Doug

john k... · 27th January 2006, 02:33 PM

Quote:

Originally posted by trusound
Starting next weekend I'm starting a MTM dipole using the SEAS W18's and Hiquphon OW1F's... temporally i plan on using the Rane RPM26Z for the processor until I can afford the DEQX..

My question is..would it be wise to dedicate a channel of processing and a channel of amplification to each W18? or can I get away with keep both drivers on the same channel?

thanks guys

(JPK) You should have no problems driver 2 W18's in parallel with any decent amp. The most difficult part of getting the response correct will be having good measurements of the W18 on an open baffle. Assuming you are using a flat baffle you may want to take a look at my method for measureing dipoles as it will apply to your W18 response. http://www.musicanddesign.com/measure_dipole.html

FYI, You will need to limit the W18s to above 100 Hz with a minimum of a 3rd order HP filter.

sqlkev · 27th January 2006, 04:23 PM

I've found that you really need heavy equalization with dipoles. So, measurements will be required and you'll need a couple bands of parametrics to get a flat sound. Do also consider time alignment as well.

trusound · 27th January 2006, 11:51 PM

Thanks guys!!!! I'll have all the processing power i need with the rane..the reason I asked is that it's easier to find amplification for 4 channels instead of 6...

I'll post pics when I start..my new router table arrived today and my new router templates will be in soon

26th January 2006, 07:33 PM	#1
trusound diyAudio Member Join Date: Aug 2005 Location: Missouri	Mtm Dipole Question Starting next weekend I'm starting a MTM dipole using the SEAS W18's and Hiquphon OW1F's... temporally i plan on using the Rane RPM26Z for the processor until I can afford the DEQX.. My question is..would it be wise to dedicate a channel of processing and a channel of amplification to each W18? or can I get away with keep both drivers on the same channel? thanks guys

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26th January 2006, 08:06 PM	#2
rick57 diyAudio Member Join Date: Dec 2002 Location: dry ol Melbourne Australia	Hi Use the same processing on both Seas. Re amps - see the Phoenix FAQ at www.linkwitzlab.com (Q&A on both ohms & watts). It’s not easy designing a first dipole. To get a better result, read Linkwitz material at *least twice –he’s the guru Cheers

27th January 2006, 01:48 AM	#3
DougL diyAudio Member Join Date: Feb 2004 Location: Wheaton IL. Blog Entries: 25	Just my personal opinion, but I think that really depends on how well your amp can handle the drivers minimum impedance. I don't see any down side to 1 amp per speaker, I crossover port per amp if you aren't compromising elsewhere to do it. Good luck, sounds like a fun project, Doug

27th January 2006, 04:23 PM	#5
sqlkev diyAudio Member Join Date: Mar 2004 Location: 714	I've found that you really need heavy equalization with dipoles. So, measurements will be required and you'll need a couple bands of parametrics to get a flat sound. Do also consider time alignment as well.

27th January 2006, 11:51 PM	#6
trusound diyAudio Member Join Date: Aug 2005 Location: Missouri	Thanks guys!!!! I'll have all the processing power i need with the rane..the reason I asked is that it's easier to find amplification for 4 channels instead of 6... I'll post pics when I start..my new router table arrived today and my new router templates will be in soon

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