BiAmping JBL 4367 Speakers

I tried a VAC 170iq, a KT88 x 4/ 85 watt per channel amp with my 4367s. That amp could not control the woofers. This resulted in forward mids and highs and recessed bass. I replaced it with a 532H, which fixed that problem.  

Pro JBLs and other pro speakers can give you an button/knob option to completely bypass an internal passive crossover. But, the 4367 probably doesn’t...So...(very easy to do, however)

- Unhook the wires running from the passive crossover to the individual drivers, but, feel free to leave the passive crossover inside the cabinet.

- Unhook the jumpers running from one set of binding posts to the other at the back of the speaker cabinet.

- Run wires directly from one set of binding posts to the compression driver.

- Run wires directly from another set of binding posts to the woofer.

Everything else should go smooth with the active crossover inside the Trinnov --> 2 different amps ---> 2 sets of binding posts (one going directly to the comp. driver and the other to the woofer).

The learning curve would be some of the fine tuning inside the Trinnov for crossover, filter type, delays and levels...

The compression driver is most probably more sensitive than the woofer...So, you’ll probably need to drop the level on it a bit inside your trinnov. You could either use a 24db/oct Linkwitz Riley setpoint or....try to blend like a 18db/oct butterworth filter hpf<-->lpf over a broader range between 700 to 900 hz perhaps, not sure what are all the crossover filter options you have inside the trinnov. To my ears, the latter type of blend tends to sound better.

Seems like my only option would to be run tubes at the preamp stage. I use a Trinov Amethyst, and appreciate the DSP function it has, especially since my room and listening position is not quite symmetrical. One side has a half wall that opens into a dining room, and my wife likes to listen with me so the main chair is slightly off center, which the DSP can correct with balance and time alignment functions.