I found 2 NOS 2203 recone kits. As I know I can put them into K120, E120, 2202, 2204, 124 and of course 2203 baskets. I'll look for them. Are there any other baskets that fit?
I want to use them in Subs together with my 4313B DIYs. What do you think?
Regarding the dimensioning of the subs I found two interesting posts from Giskard:
The 2204 can be reconed as a 124/2203 but i'm not sure about the 2206. The 124/2203 works great in a 2.5 - 3.0 cubic foot enclosure tuned to 30 - 32 Hz. In a 2.0 cubic foot enclosure tune to 26 Hz or 40 Hz and see which you prefer. The old JBL tuning frequency for this transducer was 26 Hz but in practice that was usually way too low. The Qts is extremely low at 0.14 (which hints at it's extremely powerful motor).
The old JBL enclosure chart had the following two recommendations for the 124/2203:
1.6 to 2.0 cubic feet with a 3" (7 sq in) port having a 8" duct
2.1 to 3.0 cubic feet with a 3" (7 sq in) port having a 5" duct
In both cases the Fb was ~ 32 Hz which wasn't in agreement with the user's guide which was, as previously stated, 26 Hz.
I've built a significant number of 124/2203-based subs and the best combo I have found is 2.8 cubic feet tuned to 30 Hz.
Is there a need for active Bass EQ as lot of the subbass modules provide?
Any recomendations for using them together in on cabinet?
Any help is appreciated. Thanks!