Bi-Amping Possibility, which direction ?


One of my audio systems thinking about biamping.
Have a pair of Pass X600.5 mono amps & Class A Threshold SA/4e stereo amp. Would like to put X600's on the bottom and SA/4e on top for biamping a pair of Sonus Faber Extrema speakers.

I would like to keep the system totally Balance XLR.

My preamp is the Marantz Reference SC-7S1 preamp whichhas (1) Balance Output. But has two Unbalance RCA outputs. I love the Marantz Reference SC-7S1 preamp. But again want to keep Balance configuration.

Should I go out and look for a Balance XLR Passive Crossover ? What direction would you go ? Or how would you set up.

Thank you to all who help.
lawyerman

Showing 2 responses by chazzbo

Well if lateral is the way your going you have to have one so why not the venrable Brsyston?I think it does not even come with RCA's you need cheater plusgs to make it work.Not sure that other big company Marchand has XLR's but they have sooooo many models/config's I assume it is the case.
Chazzbo
Know that Krell used to make units as well and one may come up used.They made cards for popular speakers and one might match up as well.Those units jafox put up were yummy looking but a lot of bread.I can see why most folks will take two amps that have conversion switch and go vertical for twice the power.If you take to equal amps you get 150% of ones rated power.No doubt less stess on each amp (and driver thus bette soundis reason to do this plus some more power.But geting differing amps in sound charachter and rated power changes picture greatly.As one of those who has to keep a limit on spending I often wonder how it can be done without a crossover.A review in in Stereophile of the high powered/value VTL Itl 85 integrated which must have put out prety nice sound with El34's and still had 85 watts.The reviewer and the blurb in the buying guiode said "most audiophiles should consider the integrated and get a matching power amp (same cicuts no pre-amp) and that one should consider ponying up for a pair and for amodest investment have close to a state of the art or a combo that would at least never leave you wanting.But nothing was mentioned with this bright idea of needing a x-over.Wonder if you need it or it depends on the type of crossover in the speaker and this what SEEMS to being said above.So many speakers even ones for $150 have "multiple bi-amp/wiring" posts and you read all the time that this prte or that integrated has vaiable out for bi-amping buit never is it made clear to the neophyte if a corssover is necessary or not.Guess I just need to call some companies to figure it out.A well know reveiwer was kind enough to send me a response to the basic question but unfotunately before i could commit to my porous memory I lost my emails.Hope one of the denizens here can give the basic yet complete skinny on the matter because even at this post maybe it's right infront of me but I am not seeing it.Again understand why bi-amping horizontally would be beneficial but again see why most folks dump piece for larger amp if they need it or if they have mono conversion switch just buy a second of same amp for increased power the benefits of going horizontal being offst by more power and if one needs a crossover the extra cost.Can any one help this hapless pea brain?
Chazzbo