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-   -   Replacement drivers for MarKen-10 cabinets (http://www.diyaudio.com/forums/planet-10-hifi/251856-replacement-drivers-marken-10-cabinets.html)

AlanElsdon 25th February 2014 11:41 AM

Replacement drivers for MarKen-10 cabinets
 
Hi,

A little while ago I decided to build some MarKen-10 cabinets for a spare pair of Alpair 10 drivers, all went well until a friend wanted to buy them, a week later they were returned with the drivers creased from edge to centre.

Needless to say no more builds for him!

I have decided to reuse the cabinets if possible, so the question is will the current Alpair 10.2 or the 10P work (well) in these boxes?

If my memory serves me well there was a post several years ago which suggested a method of reducing the xmax by adding a resistor, however I cannot find it. Does anyone have any ideas?

Alan

chrisb 25th February 2014 11:00 PM

There is no "current" Alpair 10.2 - the 10.3 metal is somewhat different in terms of optimal enclosure volumes and tuning, etc. Yes, the newer drivers could drop right in, but performance would be compromised somewhat. As I think Dave has posted within the past few days, he's been revisiting the math on these, and may be able to comment. Unfortunately he has been hit by a power outage yesterday, and will likely be later this evening at the earliest before fully back on line and able to access those libraries and forward or publish new drawings - I don't think I've even seen any of them yet.

planet10 26th February 2014 12:38 AM

Alpair 10.2 are close enuff to original Alpair 10 to work -- there may still be some of those kicking around Europe. The new A10.3 and A10p need to be tuned higher. There is a way to do this (we did it in our prototype Em-Ken), but it may not be all that pretty.

It involves shortening the vents, not easy to do on the inside. But one can open up the sides of the cabinet where the vent slots are to shorten them at the output end. I can work out the detail if you'd like. Probably best to use the A10p for this, gives a bit more wiggle room.

dave

AlanElsdon 26th February 2014 12:32 PM

Chris, Dave

Thanks for the replies, Alpair 10.2s appear to be available over here so I will give them a try.

Alan


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