4350 & accuphase ccrossover

[ago2001]

Hi Guys, thanks a lot for your great job you're doing here for JBL lovers and sorry for my broken english.


I hope in near future to buy a pair of these beautiful babies and I would like to use analog active crossovers.


Few questions:


- what do you think using Accuphase F-25?


- should it be ordered with just one crossover Frequency Board, 250hz filter, -12db/octave slope?


thanks!



Agostino

[ago2001]

[grumpy]

Looks like yes, if you want to stick to the 4350 recommended
configuration:

http://www.audioheritage.org/vbullet...hlight=52-5140

One could consider also ordering a 290Hz card set and switching
the F-25 to 18dB/oct.

Someone with specific experience here might offer an opinion
( I do not own a 4350 or 4355 ).

[trungkien]

Hi Guys, thanks a lot for your great job you're doing here for JBL lovers and sorry for my broken english.


I hope in near future to buy a pair of these beautiful babies and I would like to use analog active crossovers.


Few questions:


- what do you think using Accuphase F-25?


- should it be ordered with just one crossover Frequency Board, 250hz filter, -12db/octave slope?


thanks!



Agostino

I think accuphase is good . Try to find F25 is the best, Bryston 10B is the good one

[Challenger604]

How things are going in Malta??

I would stick with the 5234A with the appropriate cards if I was you.
C

[ago2001]

How things are going in Malta??

I would stick with the 5234A with the appropriate cards if I was you.
C

Sorry for late late late reply. Why 5234A is (or should be) better than Accuphase F25?

BTW: guys @ audioantiquary in Italy (https://www.audioantiquary.com/en-us/) do " ..personalized cards on every frequency and slope desired for the Mark Levinson LNC2"

what about using the ML LNC2 with bespoke 290 hz-18db / octave board?

[JeffW]

The Pass XVR1 has a 290hz option at 6/12/18/24 dB slopes. User selectable, no cards required.

https://www.passlabs.com/sites/defau...es/XVR1_om.pdf

[macaroonie]

Good call Jeff. NP knows his stuff for sure and is very open about his design goals and methods. Just look at the documentation in the .pdf . Outstanding.

[Mr. Widget]

A few thoughts on this topic.


Adding an active crossover is effectively adding a second preamp in series ahead of your amplification. If your preamp is on the level of a Denon AVR, you can probably use any active crossover and it's electronic signature will go unnoticed. If on the other hand you have an Audio Research Ref preamp or any other extremely transparent preamp, then using a JBL chip based crossover will add a sonic signature that will be quite apparent.

I only know Accuphase by reputation, and it is likely superior sonically to a JBL, Ashly, DBX, etc. crossover.

The Bryston and Pass Labs use discrete transistors to build their line stages. Pass Labs are built using very carefully hand matched components.

On the topic of the Pass Labs XVR-1 specifically, it is essentially a preconfigured breadboard. It is not the right choice for someone who is not patient and careful as it is really easy to set it up incorrectly. It's flexibility makes it extremely powerful, but setup is everything. You can set up asymmetrical crossovers with different frequencies and slopes at each crossover point.

As for 250Hz vs. 290Hz, I doubt that in this case it will be very audible. 12dB vs. 18dB, now that will be far more audible.
FWIW: the XVR-1 has 220Hz, 250Hz, and 290Hz outputs.

Lastly, on acquiring a Pass Labs XVR-1, I don't think you will be able to buy a new one as I have been told they are no longer building them. That said, enough were produced over the years that used ones do pop up.


Widget