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Hi Ian, Thank you for the explanation, specifically your reference to the "room boundaries effect" and the "passive radiator". Admittedly I...

Hello Ian You sure about that?? The JBL's go back into the 60's Rob :) https://www.lansingheritage.org/html/jbl/catalogs/1966.htm

Can you post a picture or 2??? Could be they are out of round or the voice coil returns don't line up with the keys in the cores. Could also be the...

Well it’s too small for a descent coffin. The 15M can work in a sealed box that side. Btw notions of bass reflex versus seal become blurred due...

Hi kelossus, Looking at a JBL dia. interchange table. I see for the 2425 that D8R2421 and D16R2421 are listed, among others, as possible...

Hi Ian, I do not know how to estimate it, as the apparent volume depends on the fill. Saying that, the raw volume is about 100 l. My best...

What is the volume of your enclosure?

Hi Ian, thank you for your reply. Ha, ha, small world, eh?

OTOH, the higher impedience driver will typically have a higher BL to better control the woofer's cone movement. For example, I wouldn't even...

https://www.mixonline.com/technology/1977-urei-813-studio-monitors-383665 Hi Richard this link refers to an Eminence helper woofer. When Urie...

If you use an active crossover then the individual driver’s impedance doesn’t matter. If you are using a passive crossover then the impedance will...

Hi M, I think you might be able to use your 15M woofers because they are easily be used up to about 1500 hertz. You could therefore use the wave...

I'm trying to learn the ways of you masters, but I feel I lack the brain capacity to fully digest everything. Yet, I still feel welcome and that...

I haven't been here for a long time . I have a new project so I will be there again ... gerard

UREI WOOFERS Apart from woofers specific to UREI use (U800 series), there aren't many from JBL which effectively fullfilled this task or could do...

Yes l actually met Marco through Rich in London back in 2018. I enjoyed listening to Marco’s system. Regards Ian

Hi Rob3606, thank you for your reply. As Ian noted above, the TAD 1601A that is currently mounted in the enclosure had been crossed-over at...

Do you have a 1 " driver that can bolt on to a 2344?? If you do you may want to try that. It's going to be similar. If you already have 1.5 inch...

Hi Ian, I know. There is a gentleman marco_gea on the diyaudio forum, who is very knowledgeable about all the TAD Exclusive speakers and he...

Yes that is correct. The issue only applies to a passive crossover network. You can either use your FlR dsp or a passive EQ after the FIR...

Hi Ian, thank you for your reply. I am currently using a TAD 1601A in the enclosure and if my calibration can be relied on the sensitivity is...

Hi Robh3606, thank you for your reply. Please note that I had moved any further discussion as per my post # 47. Kindest regards, M

What you need to know is the sensitivity of your 515 woofers? I don’t recall specifically but the M2 with a 2451 has a sensitivity around 110 db...

Hello Well if you look at the curve it's fairly linear until 700Hz where it quickly starts to roll off. When it starts to roll off the phase is...

I agree Todd. It’s about what works for you.

Hi Ian, in response to your reply in the thread...

Hi Ian, all, I do not believe that I had mentioned my project in my responses herein, that had been sort-of disclosed here:...