Your plan is misguided. Unless you perform surgery on your speakers to hardwire the LF input terminals of the to the woofer and the HF inputs to the correct circuitry traces for the upper crossover (MR/TW) you will be “double crossing” your speakers. Plus, an engineered product like the Fynes often have compensatory elements in their passive network that the electronic crossover won’t be able to match. Skip the electronic XO! It’s perfectly OK to just biamp into the terminals as is with the 2 amps as long as their gains are matched. 50W tube amp should suffice. I do this with my own DIY speakers to great effect with a SS woofer amp and EL34 based upper range amp.
Recommend a good tube power amp in the 100 wpc range for under $4k
Folks,
I am looking to bi-amp my Fyne F702 speakers, with a solid state amp for the low end and a tube amp for the mods and highs. The Fynes are floor standing 2.5 way units with 93 db sensitivity and 100 wpc rms power handling capacity. My preamp is a Rogue Audio RP-7, and my current solid state power amp is a Benchmark AHB2 at 100 wpc. My goal is not so much more power but to put a tube amp on the middle and highs. The Fynes have two sets of binding posts, one for lower frequencies and one for mids and highs. I am looking to go active bi-amping with a Sublime Acoustic K231 Stereo 3-Way Active Crossover.
In addition to an amplifier recommendation, what else do I need to consider? For example, if I buy an amplifier with wattage output similar to the AHB2, what other factors do I need to consider? Because I do NOT want to modify the speakers in any way, do I need to consider a gain control to match level differences resulting from other factors, such as impedance differences? Or, can I just hook up the crossover between the preamp and the two power amps and enjoy the music, which is what it is really all about anyhow?
Many thanks for any and all comments.