420b's

[badtoby]

Anyone know what speaker system those were used in?

[Old Guy]

Actually several, Santana and Madrid I know of.

[Altec Best]

+1 (Santana & Madrids) it was designed for a sealed cabinet..

Edit: Was looking for volume dims and saw your post sorry OG

[Old Guy]

sorry OG

Why? Did you fart?

Seriously nothing to be sorry about.

I think GM has made some past posts, the 420 models well in a ported box, but bigger than the Santana/Madrid.

Speaking of Madrids my brother has a set cabs decent, dented aluminum dust caps, and a couple pinholes in tweets, which should be upgraded anyway. A hundred clams. Wouldn't take a lot to make them first class.

[bowtie427ss]

"B's" were late, 1974 and after, and are the premium 420 using a 16 inch frame and the cast motor of the 416-8B.

I'm pretty sure the Madrid was out of production by the time the 420-8B came along, but as soon as i say that an "odd duck" will surface.

[voice of the theater]

"B's" were late, 1974 and after, and are the premium 420 using a 16 inch frame and the cast motor of the 416-8B.

I'm pretty sure the Madrid was out of production by the time the 420-8B came along, but as soon as i say that an "odd duck" will surface.

So, a blown 420B could be reconed into a "real" 416-8B (same motor and 16" frame)?

[bowtie427ss]

So, a blown 420B could be reconed into a "real" 416-8B (same motor and 16" frame)?

Aye Captain, it can.

[voice of the theater]

You learn something every day (hopefully). I always thought a biflex woofer would have some kind of "special" (unique) motor..... I have no clue as to how those biflex woofers work/what they actually do as far as the two cone sections etc.....

[Old Guy]

"B's" were late, 1974 and after, and are the premium 420 using a 16 inch frame and the cast motor of the 416-8B.

I'm pretty sure the Madrid was out of production by the time the 420-8B came along, but as soon as i say that an "odd duck" will surface.

My bad. I think you are right, but won't guarantee empty boxes weren't sitting around and stuffed later...have seen enough weirdness to be careful about absolutes. But have never seen a Madrid with 420B. only 420A. to be technical, 420-Z.

[GM]

You learn something every day (hopefully). I always thought a biflex woofer would have some kind of "special" (unique) motor..... I have no clue as to how those biflex woofers work/what they actually do as far as the two cone sections etc.....

Nope, just a small diaphragm suspended in a large one. At low frequencies they act ~ as one and as the frequency increases to the point where a regular woofer would be rolling off, the smaller diaphragm starts taking over since it has a lower mass and more compliant suspension best suited for the higher octaves. Ultimately, it's the 'woofer's' big VC that sets its rather 'lean' HF response and why it needs a super tweeter.

GM