How To Properly Bi-Amp (Sonic Frontiers Line 2 to Two Amps to power Infinity Kappa 9's)
brettmcee Still, how would one split an output signal from the preamp to feed the two amps? Should I just use the multiple outs from the preamp?To take advantage of biamplification, you really need an xover between your preamp and amplifiers. That will not only allow you to set the xover frequency, but will allow you to adjust for differences in gain between the two amplifiers. |
@brettmcee, Use the multiple outputs of your preamp, that’s what they design for. In most cases, vertical biamping gives your the best possible results i.e. using one stereo amp per speaker. If you choose to use two seperate brand amps, external crossover is highly recommended as @cleeds pointed out. If your amp has XLR inputs, I would recommend using XLR cables. I am also bi-amping my speakers with a class D amp (ATI-543NC) for bass and a tube amp (ARC VT-80) for mid’s and high’s. |
You don't need a crossover to bi-amp. You do need a crossover to get the most out of it. The other issue is the SF preamp. If you split the output, to a pair of amps you may fall below the recommended minimum impedance. Also, it may be worth while investigating online mods for those speakers. Some of the Infiinity speakers had really awkwardly designed crossover with terrible impedance curves, which put undue stress and limited output on amplifiers. Best, E |
So, as I was examining the crossover, and thinking to myself "There has to be someone who has improved these..." I found this: http://www.befr.ebay.be/itm/NEW-Infinity-Kappa-7-8-9-Speaker-Crossover-Filter-Network-Kappa7-Kappa8-... Based on my own experience modding old speakers, I really like the approach they took. The improvement in the impedance will be far better than biamping (of any kind) could do. Best, E |
