Activity Stream

B (Full Range) and $16,500/pr. For this year's offerings they have A (Full Range), A (Restricted Extreme LF), B (Full Range), B (Restricted LF), C...

Oh l see. Yes and Celestion had the Ditton 66 and the Ditton 25. Passive radiator loudspeakers becoming more common with near field monitors...

B Full range So just get the 4329 and subs!!! Sarcasm I don't know how they rate them??? Rob :)

Hello Ian No not that the earliest use of a passive radiator. The PR-8, 10 and 15 are in use well before the EV system were manufactured. I...

As far as the plublished papers by Thiele and Small yes. Bass reflex goes back to Novak and others theories. People had their own approaches but...

Instead of throwing the baby out with the bath water the most common issues can be worked out with some problem solving skills. 1. Is the right...

It’s actually not difficult at all if the correct process is followed. As l have pointed out elsewhere what you decide to do is your choice. ...

Do what rating did Stereophile give the 4367?

The Tale of four analogue amplifiers from a Stereophile review of the JBL 4367. Unfortunately a digital amplifier was not included in the...

:rotfl: Widget

Now now!!! LOL Rob :)

Perhaps it says Harman's check cleared? Widget

It did make their "B" list of recommended speakers. I guess that's saying something.

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...