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SET on JBL Everests - Mouse breeding an elephant?

I have a set of DD67000s and I’ve been running them on a pair of bridged Mac 275 amps.  I’ve been quite happy with the results even though most advise a lot more juice.  Lately, I’ve been hearing interesting things about the Elekit TU 8600s and I’m curious how that would work on the Everests.  Most of my listening is to acoustic guitar, jazz ensembles, piano (classical and bill evans jazz), and intimate vocals at fairly low volume with the remainder being orchestral/symphonic, early rock, big band, Texas swing at higher volumes.  Room is 22 X 40 with vaulted ceiling.  I’m thinking of adding the SET for the smaller scale stuff and leaving the 275s as they are for the rest.  Thoughts?
doodle6
ditusa's avatar
ditusa
1,901 posts
 
@doodle6,
Make sure you remove the jumpers on the back of the crossover, before you bi-amp the Everest. Also, look at the McIntosh Mc 2301's tube mono blocks, they will best the Mc 452 amp. IMO

https://blog.projectryu.com/jbl-everest-dd66000-bi-amped-with-accuphase/
fiesta75
1,378 posts
 
I totally agree with jasonbourne52 on the active crossover method. Jasonbourne52 - The second woofer in the 67000 operates up to 850 Hz., so crossover for bi-amping should be around there. I was under the impression that OP didn't want to hassle with it, so I didn't suggest that. Again I agree that limiting the frequency range to the input of the amplifiers is the most ideal (that's what I'm doing), but even if you don't do that, there will be a major improvement. The high frequency amps will not need to deliver the current in the output stage, same for the low frequency amps not needing to supply the current. The saving in output current is a significant overall load savings. 
doodle6 OP
72 posts
 
ok, thanks!  I’m going to follow the overall plan that you guys have come up with:  single 275 for mids and tweeters, single 452 for woofers.  Active crossover with signal split around 850.  That last thing is probably what I did wrong when I tried biamping when I first bought them - IIRC, I set crossover frequency at about 250 instead of 850.  
doodle6 OP
72 posts
 
I kinda like the idea of 2301s, mostly because of the looks. That’s a pretty hefty outlay, though.  Thanks for the good guidance!

best regards
fiesta75
1,378 posts
 
A couple 9V batteries in crossover? I just read the D67000 manual and it says the internal crossover has a couple 9V batteries to keep the crossover energized. Has anyone heard of this approach before and does any other speaker manufacturer do this?
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