4343 crossover modifications
Hi,
I am using a pair of JBL 4343's. Recently I have replaced some of the caps in crossover used for the 2420 driver and the 2405 slot tweeter with Jensen oil in paper caps. The results were very encouraging, and now I would like to make further improvements.
In the crossover there is a 52 uF capacitor that the entire signal for the MF, HF and UHF drivers apparently has to pass. Is there any way of getting rid of this capacitor or any other ways of simplifying/improving this crossover?
I can't biamp, and I am not quite ready for a 1st order filter like the one made by 4343mod (At least not without having seen some measurements).
I am not an expert in crossovers and any help will be greatly appreciated.
Crossover schematic :)
Re: 4343 crossover modifications
Quote:
Originally posted by jeph
In the crossover there is a 52 uF capacitor that the entire signal for the MF, HF and UHF drivers apparently has to pass. Is there any way of getting rid of this capacitor or any other ways of simplifying/improving this crossover?
The 52 uF capacitor needs to stay. Temporarily move the white lead going to the #11 lug on the bi-amp switch to the #10 lug on the bi-amp switch. The input of the 52 uF capacitor goes to the #10 lug. Listen to the system and post your impression here.
Always double check your connections when modifying circuits. You don't want to accidentally blow up drivers or amplifiers.
Re: 4343 crossover modifications
Better yet, do what Gordon stated and be done with it :yes:
That will save me the time and trouble of stepping you through the whole process of taking the HF and UHF out from behind the 52 uF capacitor and then re-adjusting the whole filter :)
3144/3145 biased schematic
Charge-coupled 3144/3145 network schematic for JBL 4344 and 4345 Studio Monitors.
Schematic moved to Post 124