Clarifying your statement would be a good first step.
- Do I understand the following correctly ?;
(i) At one time you built a DIY L300 that used a passive crossover which was built according to JBLs' network schematics. The horn used was a 2312 ( HL92 ). Is that all correct ?
YES
(ii) Then you biamped this setup , according to the proper JBL technique ( ie ; leaving select passive components in place ). Is that correct ?
No I converted to 4 way trying to duplicate the 4343 using JBL provided parts and schematics except fot the biamp part
(i) Which 10" midbass are you using ?
The one they put in the 4343 with the inverted dustcap
(ii) What are the model numbers of the horns that you swapped in ?
Don't remember. They were the 1200 cps ones JBL used in the 4343
(i) I'll assume that you have rebuilt your original 3-way passive crossovers ( modeled on the N333 ) and have built in their place a N3143. Is this correct ?
If JBL used that in the 4343 I have that
- I think the crossover point is in the 290hz region .
- Whatever it is exactly, the answer is well documented within this forums' archives. ( You'll want to mount a search . )
HOW do I do such a search? I do know they used 12dB/octave at 300 I think but was not sure if it was to allow for higher power handling or better transient responce.
(i) Did you duplicate JBLs' network designs ?
YES
- They'll be dependant on the answers to the above questions .
( Your observations are more likely the result of choices & decisions that you made when you migrated your 3-way network to a 4-way network. )