BiAmping JBL 4367 Speakers
I was considering running a tube amp on the horn portion of the JBL and keeping a solid state amp on the woofer section. My Trinov preamp has a fully adjustable electronic crossover, so I could set a crossover point for 700 Hz for the amps.
The question is would it hurt to use the external binding posts to each driver section of the speakers and leave the passive crossovers in place. I suppose I could eventually bridge the connections in the passive crossover and go directly to the drivers, but this is just a trial to see how things work.
Any significant problems with doing it this way?
Are you talking about the jumpers between the low and high frequency binding posts, or the actual crossovers mounted inside the cabinet? Remove the jumpers, use the external binding posts, leave the internal passive crossovers as is. Refer to the 4367 online manual under bi-wiring with two amplifiers. |
You can definitely use the external binding posts, no problem at all. Be sure to remove the jumpers between the high and low speaker terminals. For me, I’ve been multi-amping for 48 years, the best sound will immerge when you disconnect the internal crossover completely. If you just bypass the crossover by jumping the input and output terminals, you still have the resistance and reactance that the crossover circuit imparts. The circuit affects all the driver impedances and the load that the amplifiers see. It can be both heard and measured by test equipment. Even a DVM can measure the difference in DC resistance at the drivers and at the amplifier outputs. You will definitely hear an improvement by bi-amping, so try it your way first. If you like the improvement, then you can get inside of the speakers and make the complete change. Best wishes on your journey! I will never go back to a single amp until I’m forced to move into a senior living facility! |
You need to go inside the speaker to access the crossover. Then disconnect the tweeter and add a cable from the tweeter to the upper binding post. Connect your tube amp to it and use your active crossover to adjust the sound level. Leave the rest of the crossover alone. Do not tri-amp the 4367! Tri-amping will only muck up the sound! The stock JBL crossover is designed to have the three drivers work in harmony, particularly between the bass and mid drivers. You can get away with fooling with the tweeter response but not with the bass and mid output levels. |
My bad. Fiesta and JB71 are correct. For best results you will want to bypass the internal crossover. JBL assumes you will not be using an external crossover with their method. @fiesta75, @jasonbourne71 It is my understanding that the 4367's are a 2-way speaker, why would there be a need to tri-amp? |
