Replace 2412H in 8340

[baldrick]

Does anyone have any sugestion for an alternative (and better) driver to 2412H in the 8340?

I consider useing 8340 as LCR in my HT but need them to sound a bit better than what they do original, the 2412H can be very harsh.

So this means I need an alternative driver that fits the orginal horn in 8340 which has screw-on horn lenses.

Do i.e. this Eminence PSD2002S (http://www.parts-express.com/pe/showdetl.cfm?Partnumber=290-446) driver fit and will it be a descent upgrade?

[Earl K]

Try out some of JBLs' small threaded drivers, namely the 2407 or 2408 . ( H or J )

Due to efficiency differences of those 2 suggestions to the older 2412H, I suspect the "J" series ( with an appropriately sized parallel/conjugate resistor wired across the driver ) would be my first choice to try as substitutes .

:)

[baldrick]

The 2407 looks very promissing, though kind of expensive.. BMS 4540 (http://www.usspeaker.com/bms%204540-1.htm)is said to be the exact same driver as JBL 2407 and the price is quite a bit lower so maybe that is the best sollution for upgradring 8340?

[Earl K]

Do i.e. this Eminence PSD2002S (http://www.parts-express.com/pe/showdetl.cfm?Partnumber=290-446) driver fit and will it be a descent upgrade?

I'd stay away from a product like that ( way too much midrange ) .

I don't think you have the design chops to make something like that sound good ( even if it was possible ) .

You ( personally ) need to stay close to the original component voicing inherent within the 2412 ( meaning ; some driver component that has lame-ass midrange, but not bad upper presence, all the while having decent HF / after EQ ).

Europe makes lots of these small diaphragmed ( < 1.5" diaphragm ) drivers that fit this bill ( needing to be crossed above 1.9K due to diaphragm size ) . The hard-part is simply finding one that interfaces to your existing horn flair . Personally, I'd jettison that JBL horn also / it's nothing special . RCF used to make a similar bolton called the H9041 (http://lautsprechershop.de/pdf/rcf/h9041.pdf).

> This now all starts to be very custom design work , so I recommend hiring someone like Guido to make it all work together.

<> EarlK :)

[edgewound]

Does anyone have any sugestion for an alternative (and better) driver to 2412H in the 8340?

I consider useing 8340 as LCR in my HT but need them to sound a bit better than what they do original, the 2412H can be very harsh.

So this means I need an alternative driver that fits the orginal horn in 8340 which has screw-on horn lenses.

Do i.e. this Eminence PSD2002S (http://www.parts-express.com/pe/showdetl.cfm?Partnumber=290-446) driver fit and will it be a descent upgrade?

Simple and relatively cheap upgrade for that would be a Selenium D220ti. Full size diaphragm and voice coil.

[baldrick]

It seems like Selenium D210ti/D220ti is the most common upgrade to JRX (which also have the 2412 driver) and most people say it's a drop in replacement without the need of doing anything with the x-over. This driver is also quite cheap (1/3 of the price of BMS) so maybe this is an OK solution for HT use?

[baldrick]

I've now ordred 5 of the Selenium D220ti driver for my HT, it's going to be fun comparing how they sound compared to the 2412, hopefully quite a bit better :)

[baldrick]

Argh :banghead: I got the 5 Selenium drivers today and for the first time I opened my 8340.... that's when I found out that only the 8340a is useing 2412, and 8340 is useing something that seems more like 2413 :eek: So the Selenium drivers I've bought will not fit my horns :o:

The good news is that there are now more drivers to choose from, but the bad news is that I have 5 drivers I've no use for...