Hi all,
Has anyone tried to upgrade the crossover in their Q 200c ? It's a three-way but I only have two amp channels available so I'm planning to use a conventional first order for the mid and tweeter, and then bi-amp that and the woofer with an electronic crossover. The driver is SP1587.2 - I guess that is mostly the same as the Q100 SP1587 - just a later revision?
There's lots of info on the Q100 crossover and sp1587 driver, so it's easy enough to mimic that.
http://medleysmusings.com/kef-q100-drive-unit-testing/
So the plan is to 'copy' the Q100 crossover but shift the point from the Q100 2500Hz to the Q200 2800Hz. Then bi-amp. The Q100 uses a 0.6mH coil on the mid and a 0.68R resistor followed by a 3.9uF cap on the tweeter. Dropping those values to 0.51mH and 3.3uF should do it?
If anyone has tried pls let me know - advice/experience always welcome!
Update - the Q100 crossover values sound horrible with this driver - a huge mid-range hole so the vocals are recessed and there's too much sibilance. However, it turns out that all it needed was a zobel and the above values were fine. Funny, but it seems from pics that the Q100 doesn't have a zobel. How did they get that xo to work? Mysterious...
Anyway, if you're curious for the details, click the link to my blog.
Has anyone tried to upgrade the crossover in their Q 200c ? It's a three-way but I only have two amp channels available so I'm planning to use a conventional first order for the mid and tweeter, and then bi-amp that and the woofer with an electronic crossover. The driver is SP1587.2 - I guess that is mostly the same as the Q100 SP1587 - just a later revision?
There's lots of info on the Q100 crossover and sp1587 driver, so it's easy enough to mimic that.
http://medleysmusings.com/kef-q100-drive-unit-testing/
So the plan is to 'copy' the Q100 crossover but shift the point from the Q100 2500Hz to the Q200 2800Hz. Then bi-amp. The Q100 uses a 0.6mH coil on the mid and a 0.68R resistor followed by a 3.9uF cap on the tweeter. Dropping those values to 0.51mH and 3.3uF should do it?
If anyone has tried pls let me know - advice/experience always welcome!
Update - the Q100 crossover values sound horrible with this driver - a huge mid-range hole so the vocals are recessed and there's too much sibilance. However, it turns out that all it needed was a zobel and the above values were fine. Funny, but it seems from pics that the Q100 doesn't have a zobel. How did they get that xo to work? Mysterious...
Anyway, if you're curious for the details, click the link to my blog.
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