Rt 35i crossover rebuild

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beaglehead12
beaglehead12 Posts: 81
edited October 13 in Speakers
Is there anyone here that can help an amateur order caps from sonic craft to replace the original caps and resistors for a pair of rt35 I’s. It seems like I’m talking to 2 different people at sonic craft via email and they have confused me more.
Thanks Ben.
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  • Gardenstater
    Gardenstater Posts: 4,936
    edited 3:38PM
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    Do you have a list of values but don't know how to order on their site? If you don't have a parts list the first step for you is to remove one of the crossovers and get the values directly off of the components. That's what you should do regardless anyways just to be sure.

    I'm not familiar with the speaker and I checked where the schematics are and only found RT25i and RT55i. No RT35i.

    https://forum.polkaudio.com/discussion/38755/polk-audio-speaker-wiring-schematics-more-all-models-except-sda#latest

    It will be Sonicap Gen I that you will be ordering and you'll probably go with Vishay Mills MRA12 or if you can't find value in 12W you could go with MRA10..
    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Onkyo A-8017 integrated
    Logitech Squeezebox Touch Streamer w/EDO applet
    iFi nano iDSD DAC
    iPurifier3
    iDefender w/ iPower PS
    Custom Steve Wilson 1m UPOCC Interconnect
    iFi Mercury 0.5m OFHC continuous cast copper USB cable
    Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
    Custom Vibration Isolation Speaker Stands and Sub Platform
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  • billbillw
    billbillw Posts: 8,248
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    I'd consider Clarity Cap ESA as an alternative to Sonicap.
    For reference, this member documented the crossovers several years ago. There was also some discussion about options due to the size of the poly caps.
    https://forum.polkaudio.com/discussion/comment/2472865#Comment_2472865
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  • Gardenstater
    Gardenstater Posts: 4,936
    edited 5:03PM
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    That's not gonna be a very practical upgrade unless you get super creative (like maybe a piggyback board with standoffs), with that tiny board. If I wanted to not retain any electrolytics I think I'd be looking at a new board and point to point wiring.

    Would be right up VR3's alley if you don't mind paying.
    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Onkyo A-8017 integrated
    Logitech Squeezebox Touch Streamer w/EDO applet
    iFi nano iDSD DAC
    iPurifier3
    iDefender w/ iPower PS
    Custom Steve Wilson 1m UPOCC Interconnect
    iFi Mercury 0.5m OFHC continuous cast copper USB cable
    Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
    Custom Vibration Isolation Speaker Stands and Sub Platform
    · Share on Facebook