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Thanks guys, that’s reassuring. Is it difficult to top up the ferro fluid and is it standard ferro oil?

A guy wants to sell me his JBL 2435HPL but cannot confirm they have the Be membranes (he bought them on eBay a decade ago and haven't been used since). I am no expert myself either so I would...

Hi Lee,

Why is that? I'm not being cantankerous or questioning you experience, just genuinely curious on what you base that particular number of 5 cu ft on?

For bass reflex I'd agree but for...

Yes that's of course an alternative - and indeed the SEOS-12 is typically paired with a 12" woofer, like in the Econowave-style designs - but I really wanted to center this build around the 2123H...

Yes, to a 2122H, second order (12dB/octave).

http://www.jblpro.com/pub/obsolete/4345.pdf

But I can't help thinking that other concerns may have influenced this, e.g. baffle step, floor bounce,...

I agree but a 4-way is hardly unheard of. In this case, the extra crossover would also be low in frequency, where the ear's sensitivity is lower and other factors (i.e. room) may influence the sound...

Good morning,

I have plans to build an active 3-way using 2245H + 2123H + SEOS-12 with a Beyma CD10Nd. Estimated crossover frequencies are 180-250Hz and ~1400-1600Hz.

Reading comments from...

Hi, I've got two 2245H that I need to have reconed.

I would prefer not to use an aftermarket kit but I'm having a bit of a problem finding a genuine JBL C8R2245H kit, especially from somebody...