Hi there folks,
so quite some time back I asked about crossovers for my 604C's and received a lot of helpful information. I postponed the decision however, until I was able to source cabinets more fitting for their needs. It took me a while but I was able to find a pair of homemade cabinets that once housed a pair of 604B Hollywoods and I swapped out my EV Regency cabs for these (and noticed an immediate improvement without any further fiddling and with the stock crossovers).
Now I'm returning to the idea of improved crossovers vs bi-amping these guys. While I was waiting on the right cabinet, amp possibilities have been piling up and I've got a number of them in various states of restoration. I also picked up a Mini-DSP unit as well as a Rane ACS-22 analog unit that has the ability to time delay. I can also acquire a set of mastering lab crossovers for a price at which I'm comfortable with. The amp possibilities (for either full range with mastering labs, or as part of a biamp solution) are:
Dynaco Mk III mono blocks (6550 tubes)
Ampex EL34 mono blocks
Heathkit AA-40 EL34 amp
Akai SEP el84 mono blocks from an M8 Reel to Reel
Pilot SA-232 EL84
Grundig NF2 el84
build an RH-el84 amp with parts from a Sony tc-500 Reel to Reel (as described here:
Glow in the Dark Audio - Single Ended EL-84 (RH84 Circuit))
Preamp will be a re-capped/restored Scott 355
I know that the ideal process would be to listen to all the possibilities, however only the Dynaco's are currently up and running and the mastering labs crossover is only at the point a possibility and not in my possession
Do folks have any recommendation about if I am better off with the mastering labs crossover and one of these amps or using a pair in a bi-amp situation with active crossover and if so which amps would you choose use in such a setup?
also, as you can probably tell from that list of amps, I enjoy trying out various amplifiers, if I do go to a biamp situation, have folks made some sort of outboard solution so that I could switch between bi-amping and single amping the speakers so that I can play with the amps full range without resorting to opening up cabinets each time?
thanks
pics of the new cabinet pair below