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  • Rodgers Essex 645

    Our church recently received a donation of a Rodger Essex 643 organ - without the speakers.
    The speaker wires were just cut at the base of the cabinet.

    How hard is it to rewire speakers to this and what type to we need?

    Thanks,
    Scott

  • #2
    As far as I know Rodgers never made an Essex 643 organ--in the Essex named models, there was a 605, 625, 640, 645, and 655. Some of these had internal speakers with external speakers optional and some required external speakers.

    First, determine which model you had. The organ's serial plate will list the model, and Rodgers usually placed this on the bottom of the keydesk, near the bass end of the console. You may have to get on the floor and look up at the keydesk to read it.

    Rewiring speakers is easy. There is a terminal panel inside the console for connections to standard speaker wires. This organ probably has 3 channels--one of them, a subwoofer, which requires solid bass performance down to 32 Hz. The other two channels will suffice to handle frequencies down to 64 Hz or so.

    Here's an ebay auction for a 655 organ, so you can compare to see if it matches your model: https://www.ebay.com/itm/Rodgers-Ess...MAAOSwfN5a0KMW

    There are two Rodgers speakers on separate ebay auctions right now that would be suitable for the two non-subwoofer channels: https://www.ebay.com/itm/Rodgers-FR1...cAAOSwY7tajb8r and https://www.ebay.com/itm/Rodgers-FR1...YAAOSw9V1ajZZm

    Open up the back of the organ and trace the remaining speaker wires back to the connection panel and you'll see where you need to connect the replacement speakers.
    Last edited by toodles; 06-05-2018, 03:31 PM.

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    • #3
      Thanks.

      Actually this is an Essex 645. My mistake.

      Thanks for the assistance.

      Scott


      Originally posted by toodles View Post
      As far as I know Rodgers never made an Essex 643 organ--in the Essex named models, there was a 605, 625, 640, 645, and 655. Some of these had internal speakers with external speakers optional and some required external speakers.

      First, determine which model you had. The organ's serial plate will list the model, and Rodgers usually placed this on the bottom of the keydesk, near the bass end of the console. You may have to get on the floor and look up at the keydesk to read it.

      Rewiring speakers is easy. There is a terminal panel inside the console for connections to standard speaker wires. This organ probably has 3 channels--one of them, a subwoofer, which requires solid bass performance down to 32 Hz. The other two channels will suffice to handle frequencies down to 64 Hz or so.

      Here's an ebay auction for a 655 organ, so you can compare to see if it matches your model: https://www.ebay.com/itm/Rodgers-Ess...MAAOSwfN5a0KMW

      There are two Rodgers speakers on separate ebay auctions right now that would be suitable for the two non-subwoofer channels: https://www.ebay.com/itm/Rodgers-FR1...cAAOSwY7tajb8r and https://www.ebay.com/itm/Rodgers-FR1...YAAOSw9V1ajZZm

      Open up the back of the organ and trace the remaining speaker wires back to the connection panel and you'll see where you need to connect the replacement speakers.

      Comment


      • #4
        Rodgers 645 speakers

        Originally posted by ScottLPaul View Post
        Our church recently received a donation of a Rodger Essex 643 organ - without the speakers.
        The speaker wires were just cut at the base of the cabinet.

        How hard is it to rewire speakers to this and what type to we need?

        Thanks,
        Scott
        The organ is not hard to wire the speakers. I'm the one with the Rodgers 655 on Ebay. This is a three (3) channel amplifier and a couple of Rodgers M-10 speakers with a sub-woofer for the pedal channel will work nicely. The 645 also has a provision for antiphonal speakers for which you can use a Rodgers S101 amplifier and a couple of full range speakers. The amplifiers are supposed to be 100 watts but not sure. You will need to remove the back cover and slide the one door with the components to access the power supply/amplifer. Down at the bottom of the organ you'll see where the speaker wires are connected. Hope this will help.

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        • #5
          I believe the 645 had internal speakers, so it should play just fine without any remote cabinets. Of course the original installer might have removed the internals and mounted them elsewhere, a rather common practice by some dealers. If you remove the back panel and then loosen the two screws holding the generator panel in place, it will swing out and you can see for yourself if the internal speakers are still there. Should be a couple of 15" woofers plus two mids and two tweeters. If the internals are in fact still there, and you don't have to have externals, you can remove the wires that were added and just use it as it was originally built.
          John
          ----------
          *** Please post your questions about technical service or repair matters ON THE FORUM. Do not send your questions to me or another member by private message. Information shared is for the benefit of the entire organ community, but other folks will not be helped by information we exchange in private messages!

          https://www.facebook.com/pages/Birds...97551893588434

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          • #6
            We recently bought a Rodgers Essex 645 which had been donated to a nursing home in 2007. After the resident organist died the nursing home needed the floor space. It is now in my living room. This organ does not have onboard speakers and there is a solid wood panel where the volume pedal is located not speaker fabric. The speakers that came with the organ are 2 M10s and 1 M6. Is it possible to purchase external replacement speakers which are smaller than the M10s and M6s? I spoke with an agent at Crutchfield about smaller speakers and he said he needed to know [1] the impedance dynamic (what impedance it can handle), [2] the number of channels (is it 3?), [3] and the RMS wattage output per channel. So far, any documentation I have received from the Rodgers Organ Company has not been helpful... they have not supplied any answers to these 3 questions.

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            • #7
              Specific to your questions:

              1) The speakers can be from 4 to 8 Ohms impedance.

              2) The organ is usually installed with 3 channels; two full range channels that cover from about 65 to 15k Hz; and one subwoofer channel that covers from 32 to about 150 Hz. (The top end is not critical). The subwoofer is normally passive--i.e., it does not have an amplifier installed in the speaker unlike most home theatre subwoofers.

              3)The power of each channel is 100 watts maximum.

              For the 2 channels, if you are handy, I suggest building these speakers: https://www.parts-express.com/samba-...inet--300-7121

              For the subwoofer, this is an excellent choice: https://www.ebay.com/itm/Custom-made...AAAOSww8de7-Ys

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