The Workbench

Re: S60 Crossover components

Dillen — Sat, 16 Oct 2010 02:37:13 GMT

The earlier woofer was a VIFA M25WN-40
Later a SEAS 25 F-EW was mounted, requiring changes to 4 components in the filter;
One capacitor (C2) and two resistors (R2 and R3) was removed and the ferrite core
of the coil L1 was changed to give the coil more inductance.

Martin

Re: S60 Crossover components

justw — Fri, 15 Oct 2010 16:55:51 GMT

Thanks. Was the original woofer an SEAS also? Curious as to what parameters were different for such modest crossover changes.

Re: S60 Crossover components

Dillen — Fri, 15 Oct 2010 02:07:21 GMT

Yes, the woofer type was changed in production.
You have the late version.

Martin

S60 Crossover components

justw — Thu, 14 Oct 2010 19:20:48 GMT

I compared my S60 crossover to the schematic in a service manual and find a difference. In the manual it shows an additional RC across the woofer of 37uf and 3.3 ohm and a 47 ohm resistor across the inductor in series with the woofer. This must have been a production change after mine was made. My serial number is: 745070. Does anyone know the net effect of or reason for this change?