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JBass 212x5 bass guitar cabinet

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  • JBass 212x5 bass guitar cabinet

    A friend asked for a rig because the commercial offerings were just out of reach financially. Six kids will do that! Well, its speaker building and an area that I was not well versed in, so yeah, I will give it a try. After much searching, reading, and modeling I decided on this concept. A pr of Eminence S2012 woofers and a pr of PRO5MRN-8 mids. The crossover point is 2khz and the mids are wired in reverse polarity. I used 2nd order electrical slopes, damped on the woofers, on both sides. No BSC in this design.

    The cabinet is on the large side at 6cu ft but the light weight neo drivers, 3/4ply and minimal bracing keeps the weight down. Overall dimensions are 31.5w 24h 17.75d. The 4" ports tune the enclosure to 40hz with an f3 of 50hz. This is low enough for a 4string bass and on the edge for a 5 string.

    Many of the commercial offerings employed a tweeter, but really would have a pretty nasty null between woofer and tweeter. Most just run the woofs full out, break up and all. Kind of silly imo. Anyway, while the response here is not as smooth as we are used to seeing from our projects, it is much better than the commercial offerings I tried. Sitting directly on the floor, the bottom end is rich and full so no worries there!
    Click image for larger version

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  • #2
    I saw you post that on FB and mention Marcus Miller... was looking for a picture with him and a bass

    Looks good! I prefer tweeters on my bass rig, but that's really dependent on the playing style and personal preference. This sucker would do quite nicely. Nice grill work on that thing!
    Electronics engineer, woofer enthusiast, and musician.
    Wogg Music
    Published projects: PPA100 Bass Guitar Amp, ISO El-Cheapo Sub, Indy 8 2.1 powered sub, MicroSat, SuperNova Minimus


    • #3
      Thanks Wogg. I decided not to use a tweeter as the upper range of the bass is 8k, which these PRO5MRN-8s handle quite nicely. This allowed me to cross at a more reasonable point than most any tweeter would allow for a smooth transition.