604C's in a small room....

[ejfud]

Actually, the norm for this configuration is to tune it low as you don't want the corner boosting the grossly out of phase output below box tuning no more than necessary which usually means around 27-32 Hz for all but pipe organ symphonies and movie special effects.

GM

Thanks!

Anybody have any parameters for the 604C?

[GM]

You're welcome!

Basic measured specs from '71:

Fs = 50.5 Hz
Vas = 199.44 L
Qts = 0.265
Re = 11.1 ohms
Xmax = 0.2 mm (calc'd)

If driven with a high output impedance, then this has to be taken into account.

GM

[ejfud]

Making some progress and have them running without the back on in the basement. Sound good so far.

Now the question. I'm using the stock N-1600 crossover for now and can't seem to figure out what terminal is positive on the crossover.







Gary

[westend9]

Hey Gary,
There is discussion and schematics of N1600 on this thread. Looks to me like right side terminal of "in" is positive. Nice cabs, BTW.

[ejfud]

Here they are playing with a Stromberg integrated. The sound from these with the backs of the cabinets is real, real good. Can't wait to get them finished.



Thanks for the help Lance!

[Tranquil]

Gary.... Your cabs look great, are these the exact measurements of the 612. How do you like the sound now that you have had them for some time?

Anthony

[sidney06]

Hey Gary,
There is discussion and schematics of N1600 on this thread. Looks to me like right side terminal of "in" is positive. Nice cabs, BTW.

I have mine torn apart and the left side input, on the under side, is connected to the 0 screw, which is the positive connection point to the coil. So that's one end of the coil. The other 2 short wires on the coil are the -2 & -4 taps. The long wire coming out of the coil goes out of the crossover to the outputs. On the schematic the coil wire, going to the outputs, is the middle rail on the n1600a series crossover. The zero is the positive and the left input.