JBL 2240 vs 2245 question

[ivica]

This is the most likely to JBL spec 2245H re-cone I have come across so far:

Hi Tom,
I do sell a reproduction recone kit for the JBL 2245H. It's listed on eBay with detailed photos but I can sell it directly to you as well. I bill though a PayPal invoice to your email.

Here's the listing with a complete description.

http://www.ebay.com/itm/272038544985...84.m1555.l2649


The process to build the kit takes a few days, as it's a pretty tedious process to match the moving mass of the engineering standard: Spray aquaplas material, let dry, weigh cone, spray again, dry again, weigh again...until within 2 grams of the engineering spec. Price is $275.00.

The first kit was shipped to a customer in Finland that reported the cosmetics and sound were very accurate compared to the factory unit.

Thanks very much for contacting me.

Ken Haerr
Upland Loudspeaker Service...JBLAuthorized Since 1988
1042 N. Mountain Ave, Suite B368
Upland, CA 91786
909-946-5944

Hi,
Thanks for sharing the information

Ivica

[maxwedge]

Hi Tom,

BB6 calculation

regards
ivica

Normalize that response and it will show that the 2245 is superior down low. By 4-6db...
I don't have time to post it right now (BB6).

All 3 are simulated in my box which is about 9.2 cf and 3 x 4" ports. My 2245s are tuned to 29hz and BBP6 suggest 28hz for the 2240. The Yellow trace I bumped the 2240 up to 35hz and tuning it much higher the bottom starts dropping away.
IMO, the 2240 and other PA type 18s are better used in multiples where the low end couples resulting in a flatter curve for that use.