Marantz 2325 power amp, H704 & H705 ?

Discussion in 'Marantz Audio' started by x-rayrad, Jan 11, 2018.

  1. x-rayrad

    x-rayrad New Member

    Messages:
    12
    During the rebuild of the amp board (P700) noticed H704 & H705 are 2SA722 & 2SC1845, schematic calls out 2SA720 & 2SC1318. Both channels are the same. Any one know which is correct?
     
  2. Jailtime

    Jailtime Standin' on a corner Subscriber

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    Location:
    Velva ND
    Probably just a mid production change, and Marantz didn't bother to update the schematic or service data. KSA992 and KSC1845 are modern subs if you're looking to replace them.
     
    wurlyman likes this.
  3. quaddriver

    quaddriver 120 What's per channel Subscriber

    720/1318 is a not-uncommon marantz pairing and they handle more (milli)watts than the 992/1845 pairing. On a machine I am doing I went a bit larger since they are drivers on a small 10w machine...YMMV - what are they in the circuit, given no SCM in front of me...
     
  4. x-rayrad

    x-rayrad New Member

    Messages:
    12
    They follow the differential amp, just a stage before the pre-drivers.
     

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