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Old 30th November 2013, 03:48 AM   #21
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Quote:
Originally Posted by mudchute View Post
The 5 & 1/4" monacor at the bottom of page 1?
A pair fit in the same box (slightly longer vent), goes about 5 Hz lower and is a more appropriate sensitivity for a passive XO. That they could fit on the front means a higher XO is possible making a passive XO more managable (i'd suggets 3mH + 30 uF series as a 1st pass)

And, at least based on the published FR, less problematic.

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Old 30th November 2013, 04:04 AM   #22
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To answer the original question, with 18mm ply, and either of the 2 drivers suggetsed, 780 mm. With the dMar-Ken flipped on top driver height is ~36"

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Old 30th November 2013, 07:27 AM   #23
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That is abosultely superb, thank you!

The Seas drivers are more appealing I think. Is that a x2 per box so 4 in total or 1 per box?

I'll give it a rest for a while now whilst I get cracking getting the parts together and making the boxes. Once I'm all built and ready to go I'll come back to the thread to chat about the PLLXO if thats ok?

Once again, thank you, I'm really looking forward to the results!!
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Old 30th November 2013, 07:34 AM   #24
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Quote:
Originally Posted by mudchute View Post
The Seas drivers are more appealing I think. Is that a x2 per box so 4 in total or 1 per box?
2 per box. You will need to go active as that makes them quite a bit more sensitive than would be needed for a passive XO.

Quote:
I'll give it a rest for a while now whilst I get cracking getting the parts together and making the boxes. Once I'm all built and ready to go I'll come back to the thread to chat about the PLLXO if thats ok?
Sure.

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Old 30th November 2013, 10:00 AM   #25
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I'm on my break and I've had a better read of your postings. Just so I understand it, x2 of the monacors (per box, 4 in total) front mounted with a passive xo rather than active would give better results?

In a sealed enclosure?
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Old 30th November 2013, 06:07 PM   #26
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Yes 2 per box, front or side mounted. Both enclosures are vented.

The sensitivity of the monacor would allow for a passive XO, it would likely still work better active. As to which would sound better, without experience with each driver one could only guess.

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Old 3rd December 2013, 03:25 PM   #27
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Click the image to open in full size.

I had the mar ken's up and running for the first time today. I only managed 10 minutes of listening before I had to leave for work but I was immediately impressed. Very detailed, open, airy and clear.

Thanks for another great design Dave.

Last edited by mudchute; 3rd December 2013 at 03:27 PM.
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Old 4th December 2013, 12:08 PM   #28
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Ref the vents are they to take the same size and format as the dmar-kens or a round port/tube?

Also, is a full height internal brace like the dmar-kens best used?
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Old 4th December 2013, 03:58 PM   #29
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mudchute: does post #28 refer to woofer enclosure?

In general, our own approach re bracing is - when ever possible, cross brace opposing panels (with uneven spacing) and interlock on larger enclosures

of course one could get carried away


As to the venting - high aspect ratio slots might be less important acoustically in woofers than in wide-band enclosures such as the MarKens, but in the interest of aesthetic continuity, why not?
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Old 4th December 2013, 05:51 PM   #30
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The vent on the woofTs (in these last 2 cases) are slots at the back/bottom, loaded by a vertical vent shelf up the back.

Chris, what are those? Something for Mr Sidney?

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