419 biflex needs help

**Phil-G** · June 10th, 2016, 07:33 PM

can anyone spot what's missing on this 419 biflex driver without scrolling down for the answer?

so im playing these after i cobbled a couple boxes together. and the midrange and highs sounded way off. the bass did dig pretty low and clear even with the backs just setting in with no screws in. they sounded great out of the boxes, but with very little bass.
so i did a little looking around to find out a little about doping surrounds and i think i have an answer.

**gdmoore28** · June 12th, 2016, 05:09 PM

What's the answer, Phil? Seems somebody on this site or another offered some equivalent dope of some kind. Can't remember. Were the surrounds leaking air through them?

GeeDeeEmm

**Phil-G** · June 12th, 2016, 06:45 PM

Originally Posted by gdmoore28

What's the answer, Phil? Seems somebody on this site or another offered some equivalent dope of some kind. Can't remember. Were the surrounds leaking air through them?

GeeDeeEmm

im ordering the dope from AR on ebay. the outer surrounds are fine. the pleat around the center is dry and stiff. i've never seen a biflex without it. not sure why it isn't. 755s don't have dope on the inner pleat.

i'm pretty sure it's an original cone.

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