The modular thing seems like great idea. Lots of possible configurations.
How do you think Mar-Ken12pW + uFonkenSET would work? Strange baffle step issues?
How do you think Mar-Ken12pW + uFonkenSET would work? Strange baffle step issues?
So far i have only heard i have a single Mar-Ken12pW all by itself (very promising). Bernie had a bit more. The drivers to populate the pair are in my office and the boxes are 100km away.
Bernie will be here shortly to pick up the drivers so we can start listening to them.
dave
Bernie will be here shortly to pick up the drivers so we can start listening to them.
dave
Wow. I'd love to do a build like this. But without passive crossovers it's simply a no go for me :-(
Bernie and i were talking about passive XOs for the A12pw box. With A10p and a pair of bass cabinets a passive XO with about 3-4 dB BSC should be doable (XO at or suitably below the BS -3dB). Part of the experiment is intended to XO a tweeter to the A12pw (they are more extended at the top than some drivers termed Full-Ranges)
dave
dave
While I personally like the flexibility of any of the numerous bi-amping methods we've tried, there's not doubt of the appeal of simplicity of the single amp approach. Didn't Mark's original plan, and at least one of Scott Lindgren's designs incorporate a passive at 1K or or? Admittedly an area that some of us eschew, but it would certainly make things cheaper than the 200 - 320 Hz range we prefer.
As for tweeters for the A12PW, the first two candidates that come to mind are the very affordable A5.2, or the ESS AMT1 - still the best tweeter I've ever personally heard or worked with - and I generally try to avoid using that term when talking about audio gear.
As for tweeters for the A12PW, the first two candidates that come to mind are the very affordable A5.2, or the ESS AMT1 - still the best tweeter I've ever personally heard or worked with - and I generally try to avoid using that term when talking about audio gear.
sippy - I can't remember actually seeing that schematic before, was just going on foggy recollections of discussions of the general target XO frequency
and as for my remark above about tweeters for use with the 12PW, I was thinking along the lines of drivers other than the A7P or 7.3 (the latter being what we employed in the first iteration of MLTL MTMs)
and as for my remark above about tweeters for use with the 12PW, I was thinking along the lines of drivers other than the A7P or 7.3 (the latter being what we employed in the first iteration of MLTL MTMs)
The M.A. threads were my go to reading when suffering from insomnia
Shame that Mark was run off the forums 🙁
interesting how MA has been able to continue with new models and improvements without the advice of self appointed forum experts in driver design
Alpair 7P & Alpair 12PW combination.
I don't think Mark was run off the forums per se. But it was a wise decision to leave.
I don't think Mark was run off the forums per se. But it was a wise decision to leave.
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Mark left?
He was actually partly the reason I bothered to join this forum in the first place... Oh well.
He is a very skilled engineer and I would have liked to have spoken to him on here about how to get the most out of his drivers.
He was actually partly the reason I bothered to join this forum in the first place... Oh well.
He is a very skilled engineer and I would have liked to have spoken to him on here about how to get the most out of his drivers.
There are disciples and acolytes still kicking around with a modicum of experience with his marvelous drivers.
As for the man himself, when not in forum self-defence mode, a most delightful gentleman and dinner companion
As for the man himself, when not in forum self-defence mode, a most delightful gentleman and dinner companion
Alpair 7P & Alpair 12PW combination.
Hey guys, I'm trying to prise the outer frame covers off a pair of Alpair 12pw's. They were supplied fitted and obviously don't want to crack the frame trying to remove them. Any tips?
Hey guys, I'm trying to prise the outer frame covers off a pair of Alpair 12pw's. They were supplied fitted and obviously don't want to crack the frame trying to remove them. Any tips?
I like simplicity in design, and symmetry as well.
But not at the detriment of good sound of course.
I was thinking, since I love sealed boxes, how about 12pw down low, and 12p for mid/high, in stacked sealed boxes? Biamped.
I had TB in mind originally, but I'm warming up to MA drivers, and since I never got a chance to listen to MAs yet, this could be an idea I could try.
But not at the detriment of good sound of course.
I was thinking, since I love sealed boxes, how about 12pw down low, and 12p for mid/high, in stacked sealed boxes? Biamped.
I had TB in mind originally, but I'm warming up to MA drivers, and since I never got a chance to listen to MAs yet, this could be an idea I could try.
Hey, looking to build the MTM Dual TL speakers, but I don't want to Bi-Amp them. Could somebody help me out here? Should I use a crossover, or should I just run them all full-range? Also, does somebody have enclosure plans for this speaker they could link me to?
They do need an XO. A passive XO is quite a bit harder than a passive one but can be done.
The relative sensitivities of the drivers make for a much easier job if you use A7.3 instead of A7p (which would need some padding).
We started these with A7PeN but switched to A7.3eN which turned out to be better sounding and enabled us to start working on a passive XO.
We have so far done a 4th order parallel XO, and a 1st order series. The 1st turns out to be best overall (good enuff to publish) but not everywhere so we will continue our work.
The cost of decent parts for this XO is considerable (a pr of the cheapest Solen FastCaps for the large cap is over $140 CAD FOB Solen, and there are a lot more parts than that) because of the ~250 Hz XO. Certainly enuff to make a 2nd power amp and the PLLXO (ignoring RCA jacks and case typically $1-10 if you don’t use exotic caps) this MTM was designed to use.
The plans for this MTM TL are part of either the A7x or A12x paid plansets. http://www.diyaudio.com/forums/plan...10-hifi-minionken-plan-set-subscriptions.html We had help from Dr Scott @ Woden for the ML-TL.
dave
The relative sensitivities of the drivers make for a much easier job if you use A7.3 instead of A7p (which would need some padding).
We started these with A7PeN but switched to A7.3eN which turned out to be better sounding and enabled us to start working on a passive XO.
We have so far done a 4th order parallel XO, and a 1st order series. The 1st turns out to be best overall (good enuff to publish) but not everywhere so we will continue our work.
The cost of decent parts for this XO is considerable (a pr of the cheapest Solen FastCaps for the large cap is over $140 CAD FOB Solen, and there are a lot more parts than that) because of the ~250 Hz XO. Certainly enuff to make a 2nd power amp and the PLLXO (ignoring RCA jacks and case typically $1-10 if you don’t use exotic caps) this MTM was designed to use.
The plans for this MTM TL are part of either the A7x or A12x paid plansets. http://www.diyaudio.com/forums/plan...10-hifi-minionken-plan-set-subscriptions.html We had help from Dr Scott @ Woden for the ML-TL.
dave
I built the two passive XO's that Dave mentioned above (design by others) - as he says, the total parts cost for the large film caps and air core inductors was well over $150 for either version - luckily we had some on hand, so "we" didn't have to fork out the full amount for both.
I personally preferred the parallel myself, but would also suggest that a dedicated PLLXO could be put together for far less than the cost of either passive - and my guess is that a large number of serious DIY idiots, oops, fanatical builders, would have enough spare amps to chose from.
Just for a lark, I also built a 4-channel digital amp (SURE TK2050) with buffered selectable LLXO to compare. Thanks to recycling an old Bogen amp chassis, the total parts cost of this little beast was approx $200.
I could live with any of them, but the simplicity of a dedicated one box solution has a lot of appeal - hell, if I knew what I was doing, it could incorporate something like a streaming receiver, or even minidsp for an upstairs background music system. That's pretty much what Tom Christiansen described in a post of his on the Modulus86 build thread.
Nice amp that Mod86
I personally preferred the parallel myself, but would also suggest that a dedicated PLLXO could be put together for far less than the cost of either passive - and my guess is that a large number of serious DIY idiots, oops, fanatical builders, would have enough spare amps to chose from.
Just for a lark, I also built a 4-channel digital amp (SURE TK2050) with buffered selectable LLXO to compare. Thanks to recycling an old Bogen amp chassis, the total parts cost of this little beast was approx $200.
I could live with any of them, but the simplicity of a dedicated one box solution has a lot of appeal - hell, if I knew what I was doing, it could incorporate something like a streaming receiver, or even minidsp for an upstairs background music system. That's pretty much what Tom Christiansen described in a post of his on the Modulus86 build thread.
Nice amp that Mod86