7a crossover question/difference


The crossover does not match any of the ones in the stickies above. A 4.5 ohm resistor in series with the 12uF cap, rather than a 2.7.
The 2.7 is in series with the small inductor, akin to the original M10

Yes, I'm going to replace them with exact values, but it seems that this would be a more "laid back" crossover design that the others.
Or am I way wrong?

94qh6w8pzaok.jpg

As best I can tell, this is the schematic used on these 7As
oyseb5l2460u.jpg

Searches found these posts.
http://forum.polkaudio.com/discussion/59876/special-monitor-7-what-should-i-do

http://forum.polkaudio.com/discussion/148369/polk-monitor-7a-with-peerless-resistor-value

Comments

  • pitdogg2pitdogg2 Posts: 10,810
    Only thing I can add here is the resistors are +/- 10% tolerance so between 4.7 and 4.5 they are to close to worry about.
  • westmassguywestmassguy Posts: 6,109
    Perfectly normal for a Peerless Monitor 7. Use the same values
    Home Theater/2 Channel:
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  • tonyp063tonyp063 Posts: 418
    Thanks Dave. I will.
  • tonyp063tonyp063 Posts: 418
    Just circling back for posterity & in case someone needs the info.
    The crossover schematic above is correct.

    Picture is the caps & resistors dry-fitted before soldering.
    Also replaced the binding posts & anchored everything with a set of Larry's rings I've been holding on to for years.

    Let me just put it this way.
    You will have to pry these from my cold, dead fingers to get them away from me.

    hofh0kfbb13a.jpg


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