Bryston 10B STD 2 way stereo crossover with JBL 4355's - Sonic Improvement?

[JBLPRO]

Hello All,

I would like to get some opinions about using a Bryston 10B STD as the electronic crossover to replace the JBL/UREI 5235 as the active crossover(2235's/2202H) with the 4355's. The Bryston has 12 fixed crossover points for the(2) Hi and Lo pass slope controls. The closest crossover point on the 10B that matches the original JBL spec'd 290Hz is 300Hz. There is also a 250 Hz point. A 6, 12 or 18dB per octave slope can be selected for each filter. I am pretty sure that the 300 hz will work just fine and that with the flexibility of the 2 filters I think a flat response can be achieved. I know the 10B can be ordered with custom crossover points. And I assume units could be sent in for modification or possibly by the user but that would violate the extended warranty. I am using a modified JBL/UREI 5235 that sounds pretty good but I hear that the Bryston when set up properly is a very big improvement over the 30 year old 5235.

Any thoughts on this?

[Vahe Sahakian]

I always wondered about 290 Hz crossover point chosen for the two larger 4 way monitors, why not just round off to 300 Hz. I have two 5234’s that I use with my DIY 4350, one has 250 Hz card originally intended for this speaker and the other has 290 Hz card, I have tried both crossovers with this speaker and can not tell any difference in the performance or the overall sound.
No opinions on Bryston.

Vahe

[Ian Mackenzie]

Any thoughts on this?

Its a no brainer but check the JBL 5235 crossover manual for the correct 4355 crossover values.

I have a feeling they are not standard so if Bryston can do a custom value I would do it.

[martin2395]

250Hz should also work well, it's a "12 midbass in the end.

I can tell you that an error of 20-30Hz on crossover frequency is worth the gain in MF/HF performance. My journey began with the 5235 (which I found to be rubbish), then came a BSS FDS-360 (now we talking) and when I got the 10B it was miles ahead of both when it comes to sonical performance.

[Ian Mackenzie]

Reference to the 5235 manual the same card is common to the 4345 and the 4355 part no 51-5145.

This is an 18 db slope card at 290 hz