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Purrsay - Silverline

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  • #16
    Just finished the bracing on 2 LCR's I decided to keep the center the same. Maybe with an optional baffel and top mounted tweeter for use as a horizontal. I have to cut all the supports for the last LCR. Whenever. No veneer or final touches until I get the working crossover. Next in line. Alll the rest can be done indoors now. Lots of time before the holidays this Winter. The drivers I have left will be used as surrounds. 2, 6.5" 8ohm HDS, 4, 4.5" PPB Peerless 4ohm. I would have to find 4, 4ohm silk dome tweets. Dayton does have them. Better order soon!! There goes my full driver stash!!

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    • #17
      Originally posted by PWR RYD View Post
      I've used that Peerless buyout woofer a couple of times. Really great sounding woofer with excellent sensitivity. It could easily match up to the silky in an MTM without a midrange driver. Its only short coming is that it won't extend very low in frequency. LouC used it in about 22 Liters in his Lecbos project with a F3 of about 70 Hz. I recently used it in an MTM in 17 liters with about the same F3. I matched it up with the Dayton Audio ND25FW tweeter. Awesome sounding speakers for very little money. I'd publish my design but the woofer is no long available :( wish I could buy 100 more of them...
      Always a good idea to publish a design. There are plenty of those floating around or sitting on shelves somewhere. I think I may even have a pair somewhere. Just basic information of size, driver location, tuning etc. is enough for most people.
      Don't worry, if your parachute fails, you have the rest of your life to fix it.

      If we all did the things we are capable of doing, we would literally ASTOUND ourselves - Thomas A. Edison

      Some people collect stamps, Imelda Marcos collected shoes. I collect speakers.:D

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      • #18
        Originally posted by PWR RYD View Post
        I've used that Peerless buyout woofer a couple of times. Really great sounding woofer with excellent sensitivity. It could easily match up to the silky in an MTM without a midrange driver. Its only short coming is that it won't extend very low in frequency. LouC used it in about 22 Liters in his Lecbos project with a F3 of about 70 Hz. I recently used it in an MTM in 17 liters with about the same F3. I matched it up with the Dayton Audio ND25FW tweeter. Awesome sounding speakers for very little money. I'd publish my design but the woofer is no long available :( wish I could buy 100 more of them...
        By the way, I calculated the efficiency of the woofer to be somewhere around 90.6 dB, higher than PE's specs. I think a silky will be just able to match up in an MT or MTM.

        In a 17 liter net enclosure, tuned to 57 Hz, I see an f3 of 54 Hz. This is in an alignment using parameters which are an average of 4 tested units.

        Where does your f3 of 70 Hz come from? Is this calculated or tested? What parameters did you use?
        Don't worry, if your parachute fails, you have the rest of your life to fix it.

        If we all did the things we are capable of doing, we would literally ASTOUND ourselves - Thomas A. Edison

        Some people collect stamps, Imelda Marcos collected shoes. I collect speakers.:D

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        • #19
          70 hz?
          I think that was a quesstimate??
          I was hoping for some low frequency extension by my eq.. I be happy with 80 hz :/
          I've heard them briefly on another crossover, sounded ok..

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          • #20
            Originally posted by thekorvers View Post

            By the way, I calculated the efficiency of the woofer to be somewhere around 90.6 dB, higher than PE's specs. I think a silky will be just able to match up in an MT or MTM.

            In a 17 liter net enclosure, tuned to 57 Hz, I see an f3 of 54 Hz. This is in an alignment using parameters which are an average of 4 tested units.

            Where does your f3 of 70 Hz come from? Is this calculated or tested? What parameters did you use?
            I'm was positive that I seen that they were 90.5 db.
            I checked back and it was 89.5!!
            I had a few 2 ways. I wanted a 3 way. I can always pop in other drivers down the road. Hopefully not!

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            • #21
              Originally posted by thekorvers View Post

              By the way, I calculated the efficiency of the woofer to be somewhere around 90.6 dB, higher than PE's specs. I think a silky will be just able to match up in an MT or MTM.

              In a 17 liter net enclosure, tuned to 57 Hz, I see an f3 of 54 Hz. This is in an alignment using parameters which are an average of 4 tested units.

              Where does your f3 of 70 Hz come from? Is this calculated or tested? What parameters did you use?
              Calculated F3 of 68 Hz from Unibox using the average of my four measured woofers. I'll have to search a bit to find those T/S's. If I remember correctly the box model didn't change much using the PE published parameters. I have enough subwoofers available that a low F3 isn't a design concern.
              Craig

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              • #22
                I believe my calculated sensitivity with the two woofers in series was about 90.5 dB/2.83v/m
                Craig

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                • #23
                  Changed name to Phantom Edge!!
                  In the process of sealing the MDF.
                  Maybe a start to a passive cross on the weekend.

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                  • #24
                    Had time again! Left and Right are mdf sealed, ready for vinyl wrap and baffel sealing tape. I initially used Rust-Oleum for the first to seal it. Found it was way cheaper to use water and wood glue for the other two! Practice for paint, if I ever do.. The edges are routed for aluminum corner edging. Had a chance to start a crossover in WinPCD Like someone mentioned, I will be padding down the mid substantially. Too bad I can't use the mid to bump the lower frequency without upsetting the impedance load. Non the less I will see what I can come up with soon. At least the mid is down at 86db in the low freq. end slowly rising. Getting close to the holiday season. See if I can get it done. The 3rd channel is still in pieces eating to go through the same process. B way quicker.

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