What is the easiest (or most accurate) way to measure the tuning frequency . . .

[Jimmy154]

of a completed BR enclosure?

[Flaesh]

easiest - looking diaph. displacement vs freq.

[crazyhub]

Impedance graph.

[Jimmy154]

I tried both of those. Impedance I don't know how to graph easily. Going by cone movement it looks to be tuned to 25 Hz.

[Pano]

Impedance graph will tell you, it's the best way I know of. The tuning frequency is between the 2 impedance peaks.

[bentoronto]

Are you interested in results (the sound at your ears) or a specific component?

I've never found design/theory to be any too close to the end product performance. I'd never fuss getting a component right. I'd get right to the final total system performance because the "imperfections" of a component (vis a vis design/theory) might prove to be exactly what is needed to compensate for something else in practice. And sometimes prematurely making a component closer to what you thought you wanted may make the system worse.

I have found this to be esp. true when it comes to crossover frequencies. Anyway... I can't think of any reason to work with anything but multi-amp designs and a tunable e-crossover.

I never cease to be delighted by a free program called REW (from a home-theater website). Runs on a Mac too. All you need is a cheap sound level meter.

Ben