Altec Fever!!

[RonSSNova]

You are using solid state amps?
The woofer is always connected directly to the amp with a passive crossover. It’s through a coil, but that very low resistance. Yes, the caps in the LF circuit would short out any hf oscillation, but the odds the amp would oscillate are slim to none.
On the tweeter side, you could put say a 20uf cap in series to block DC. But then you are listening to that cap.
Solid state amps have good protection circuits that shut the thing down at a hint of DC at the outputs.

If you are running tube amps there is no DC to worry about. If it oscillates it’s a crappy design.

 

[sanjib]

Got it, and it is assuring. I am using Altec 1569A for HF, which I modified to reduce noise and make it stable.

 

[Nyjblbob]

For Biamping good quality horns
I have yet to find a better amp for them
Than a 45 or a 2a3 SET
Have your choice of amps
for the Woofers
Bobhorn

 

[sanjib]

For Biamping good quality horns
I have yet to find a better amp for them
Than a 45 or a 2a3 SET
Have your choice of amps
for the Woofers
Bobhorn

Currently, the combination is working like a charm for 605A. But for 604-8G, tweeter is a bit honky!

 

[sanjib]

After a few shuffling of input stage tubes in Cary 120S MKII, I was able to get a very good combination of amps for 604-8G. After listening with active crossover and biamping ( both 604 and 605), I am not going back to passive crossover anytime soon!