pos, I think we actually might be in agreement, our differences residing in the terms in which we argue:
If you read my argument, I'm sticking to a constant displacement, ie 1mm.
PV=pressure...
Type: Posts; User: tagerbaek; Keyword(s):
pos, I think we actually might be in agreement, our differences residing in the terms in which we argue:
If you read my argument, I'm sticking to a constant displacement, ie 1mm.
PV=pressure...
thanks for the input Ian,
I reckoned that the single 2118 could just about keep up with the double 136a's. Max spl is a close match.
Impedances etc are not an issue, I have six Crown gradient...
Hello again,
thx for the replies, yesterday our 4yo kid woke us up in the middle of night, so I did some more thinking:
1. Using two drivers definitely adds 3dB efficiency compared to a...
Thanks for the answers, but, no, I still don't get it.
Exemplifying again: take a 90dB/1W driver, feed it 2W, you get 93 dB. Take two drivers, feed them 1W each (coherent) and you get 96dB for...
Hello Lansingheritage,
I started building speakers just 3 years ago, so I'm still a rookie struggling with the basics. Here's two interrelated questions:
Q1. I've got four 136a's and a pair...
Everybody, thanks for the help.
Boputnam: nice pictures, thx, this might be exactly what the seller was talking about.
I had the definite impression that the 2245H was not being produced...
Hello JBL specialists,
I've bought one 2245H NIB on ebay. The seller is now offering me a 2nd one in new condition, but this one he says has ribs all the way down to the dust cap. AFAIK the ribs...
Hello all,
The cones of the 2118's I just received are very soft and flexible.
With a finger I can push the cone out of shape; it then returns to its normal shape by itself.
Is it normal for...
Hello sub, thx for your effort. I make that angle arctan((.98-.68)/(2 x 2.025))=4.24 degs. Hmm..., even worse than the 5 degs I've estimated earlier.
Hey, with those german-skills I bet you could...
Hello there,
rob, thanks for the links and your interest, I'll also try madison and rec.audio.tech before bothering Mr Edgar.
About the horn size: the cabinets are already built, I can only...
Hello guys,
thanks for the input,
rob, I'm arriving at the same conclusion as you, regarding the horn/driver angles: most people simply blissfully ignore the problem, and sometimes it...
Hello guys,
frank: OK, I was wrong wrt the 2440, it's tapered allright. I have already measured the 2445 using a steel ruler and a graded drawing arc, this is reasonably accurate. However, this I...
Thanks for the input, ROBH3606 - Alas, if only I had a 2327.
But: the 2327 is 105 mm long. According to Pythagoras, if it were straight-sided, then its angle would be 6.56 degs, to convert between...
Hello JBL savants,
I'm putting my 2426 and 2445 compression drivers on home-made wooden tractrix horns.
The throats of the drivers are tapered: on the 2445 it's visible, on the 2426 the mesh...