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Kitchen Cupboard 3-way Build

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  • #16
    I wasn't entirely happy with the bass, so I changed to the PRV Audio 15SW2000 15" Pro Audio Subwoofer. At​ 3.8cu ft, my box is dead on PE recommendation and bass is improved. F3 is 42Hz, with clearly audible notes down to 35Hz.

    I may still change the port location, I'm having some directional issues with the bass but it may just be room/placement. Though these are 96dB vs the 97dB of the others, overall loudness and clarity is improved too. Maybe the crossovers just get along better with these woofers? I'm going to let them run for a few hundred hours before I change anything, the other drivers definitely benefited from break-in.



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    • #17
      What did the bass sound like with the original woofer? How does it sound now with the new woofer?

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      • #18
        Originally posted by Billet View Post
        What did the bass sound like with the original woofer? How does it sound now with the new woofer?
        The original woofers were boomy around 70-80Hz, and showed a marked decrease in level between there and 40-60Hz. The new ones are much more level across the bass range and "tighter" on attack/decay. I'm also hearing more detail in the mids now that I think was obscured by the earlier woofers.

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        • Billet
          Billet commented
          Editing a comment
          Nice! The bass attack and decay are harmonics and are enhanced by the improved midrange of the woofers. Sometimes there is just no replacement for a higher quality driver.

          Also, for the low bass the new woofer has a stiffer suspension (lower Vas and Cms) and is a better match for the enclosure volume.
          Last edited by Billet; 11-04-2022, 07:17 PM.

      • #19
        Final parts list with prices. I'm VERY pleased with the results!
        PRV Audio 10MB800FT 10" Professional Midbass Driver 8 Ohm 294-2988 2 119.91 239.82
        PRV Audio 15SW2000 15" Pro Audio Subwoofer 8 Ohm 294-3007 2 189.91 379.82
        PRV Audio D260My-B 1" Mylar Horn Compression Driver 294-2992 2 49.91 99.82
        PRV Audio 3DF400/1800 Three-Way Crossover Board 400/1,800 Hz 294-2869 2 139.91 279.82
        B&C ME45 1" Exponential Horn 90x40 2-Bolt 294-622 2 56.42 112.84
        Parts Express Gold Recessed Binding Post Banana Jack 5-Way Speaker Terminal 260-309 2 5.98 11.96
        KLËARVŪE Cabinetry® 18"W x 14"D x 40"H Wall Cabinet - Box Only 4780022 2 69.69 139.38
        KLËARVŪE Cabinetry® 18"W x 14"D Shelves - 2 pk 4783504 2 16.97 33.94
        3/4 x 2 x 4 Oak Plywood Handi-Panel 1254541 2 38.39 76.78
        GSCIT Club Oak Edge Banding, 7/8 inch x 50ft 1 19.99 19.99
        3/4in W x 1/8in T High Density Adhesive Closed Cell Foam 1 9.98 9.98
        misc paint/hdwe 1 100.00 100.00
        TOTAL 1504.15
        Click image for larger version  Name:	3wayfinal.jpg Views:	16 Size:	566.3 KB ID:	1492936
        Last edited by Harpo; 11-21-2022, 02:45 AM. Reason: corrected sub desc

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        • Billet
          Billet commented
          Editing a comment
          They look great! The horns look especially nice, I like them standing proud like that. The ME45 is a nice horn.

      • #20
        What attenuation settings did you end up with (on the XO board)?

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        • #21
          Originally posted by Chris Roemer View Post
          What attenuation settings did you end up with (on the XO board)?
          Attenuation: Mid 0dB, Hi 6dB
          Bright: On

          I fiddled with these a lot, then finally just played them for a ton of hours before landing on these settings. There is a considerable break-in time on all three of these drivers in my opinion. The box is tuned to 45Hz, and the "port behind the horn" works very well. I added stands to raise them 10", I really prefer these with the mid at ear level. It also helps spread the music around the house; there is a couch in front of them, with dining room and kitchen behind the couch.

          My goal was high efficiency and room-filling sound, I'm totally happy with the end product. At ~100dB sens, my little 10w EL34 amp has no problem with ear-splitting levels, way above what I would ever run.

          Did I spend too much? I'm curious what a commercial equivalent to these would be, any ideas?

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