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View Full Version : 4628b Cabaret with 5235 x-over - taking the 2118 8" down to 250Hz?



JamesPorch
09-13-2010, 01:31 PM
Hello,

I have just purchased a pair of 4628b from a popular auction site. I bought them to join the JBL club and have picked up a 5235 crossover really cheap too. It has the 250Hz cards. I know I could mod the cards to 800Hz BUT...

These will be my main Hi-Fi in a 18' x 24' room. Can I not run the 2118 from 250 up?

Am I reading the schematic right that the 8" is NOT lo-passed? Also too the E145 is straight through?

I won't need SR SPLs but would a single 2118 work that low? The 4612 uses 2 x 2118 and gets down to 70Hz...

Loads more stuff that I want to ask but just glad to be in the club for now! I haven't even picked them up yet! Re-tuning the cab, better crossover, drivers vertical, move baffle forward to remove overhang etc

Many thanks to the JBL family.

martin_wu99
10-15-2010, 10:12 AM
Hello,

I have just purchased a pair of 4628b from a popular auction site. I bought them to join the JBL club and have picked up a 5235 crossover really cheap too. It has the 250Hz cards. I know I could mod the cards to 800Hz BUT...

These will be my main Hi-Fi in a 18' x 24' room. Can I not run the 2118 from 250 up?

Am I reading the schematic right that the 8" is NOT lo-passed? Also too the E145 is straight through?

I won't need SR SPLs but would a single 2118 work that low? The 4612 uses 2 x 2118 and gets down to 70Hz...

Loads more stuff that I want to ask but just glad to be in the club for now! I haven't even picked them up yet! Re-tuning the cab, better crossover, drivers vertical, move baffle forward to remove overhang etc

Many thanks to the JBL family.
same question for me!:confused:

short_circutz
10-17-2010, 05:54 PM
I don't see the harm in it...we built some small/compact stage monitors using 2118's for the woofers and run them lower than that. The data sheet states that it can be used as a low frequency transducer down to about 70hz using a .5 cu ft enclosure. Does the 4628b cabinet have it mounted in a sub-enclosure?

martin_wu99
10-18-2010, 08:01 AM
I don't see the harm in it...we built some small/compact stage monitors using 2118's for the woofers and run them lower than that. The data sheet states that it can be used as a low frequency transducer down to about 70hz using a .5 cu ft enclosure. Does the 4628b cabinet have it mounted in a sub-enclosure?
yes,4628B has a enclosure for 2118,and 4698 has it for E110.:D

martin_wu99
10-20-2010, 01:07 AM
yes,4628B has a enclosure for 2118,and 4698 has it for E110.:D
Sorry, 4698B doesn't have a sub-enclosure for E110-8.

martin_wu99
11-12-2010, 01:10 AM
Hello,

I have just purchased a pair of 4628b from a popular auction site. I bought them to join the JBL club and have picked up a 5235 crossover really cheap too. It has the 250Hz cards. I know I could mod the cards to 800Hz BUT...

These will be my main Hi-Fi in a 18' x 24' room. Can I not run the 2118 from 250 up?

Am I reading the schematic right that the 8" is NOT lo-passed? Also too the E145 is straight through?

I won't need SR SPLs but would a single 2118 work that low? The 4612 uses 2 x 2118 and gets down to 70Hz...

Loads more stuff that I want to ask but just glad to be in the club for now! I haven't even picked them up yet! Re-tuning the cab, better crossover, drivers vertical, move baffle forward to remove overhang etc

Many thanks to the JBL family.
Why do you make 2118 work down to 250hz?in fact ,E145 can work very well up to 850HZ.:D