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  1. M

    Speaker Upgrade for Fender Rumble 40

    Excellent idea. I ended up ordering a Speaker Cabinet Port Tube 2-1/2" ID Adjustable and glued it in behind the existing port. I have it at about 7" length tuned to about 35 Hz Port Length Calculator Standard Port Calculator - DIY Audio Guy Net Enclosure Volume (ft³ or liters): 2.5...
  2. M

    Ibanez Mikro 5 string bass upgrade questions, help needed ?

    Unfortunately - no drop-in replacements – I ordered an Ibanez B305 – the top two holes match but the bottom 5 are off slightly. Also the smaller screws supplied aren’t great – two broke off. I ended up having it installed by an expert luthier. The 305 is a nice upgrade – high mass, quick...