• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

Yet Another Minimus 7 Upgrade Thread - Coronavirus Edition

Pete, thanks for all your kind contributions!

I did receive that crossover pair today. To back up your measurement of the inductors I used a digital LCR meter and did the following. Not knowing whether or not the woofer inductor could be measured in circuit I measured it in and out of circuit as it was easy enough to pull one lead. The difference was negligible. As far as the tweeter inductor I measured it in circuit only as it's glued to the board and just didn't want to go there as the leads seemed pretty well trapped underneath- and it's late, what can I say. From the schematic (and without the 47 ohm) I don't think anything in in parallel to affect this reading- Someone can most certainly correct me if this is wrong. The driver is not attached.

If anyone is interested, here's the readings I see at 6 different frequencies, woofer inductor on the left, tweeter on the right, in mh:

1.62 100Hz 2.1
1.37 120Hz 1.5
0.89 400Hz 0.42
0.84 1KHz 0.34
0.82 4KHz 0.31
0.79 10KHz 0.31
 
FWIW, I just modified a set of M7's using the @Pete B modification to the Amazon uxcell crossovers.

In my opinion, they went from almost unlistenable to quite reasonable.

PS - In case anyone is wondering about the picture, I left the original crossover parts attached to the speaker terminal but fully disconnected.

1789520321193.jpeg
 
Back
Top Bottom