Test Bench: The BWX-6501 Midbass from MISCO’s Bold North Audio Line

This Test Bench characterizes the very recent BWX-6501 Midbass driver from MISCO’s Bold North Audio Line. MISCO (Minneapolis Speaker Co.) is the oldest OEM driver manufacturer in the US, founded in 1949, and Bold North Audio is its new brand, launched in 2019. The Bold North lineup was recently expanded to include two new 6.5” XBL2 motor woofers. These new models, all designed and manufactured in MISCO’s own facility in St. Paul, Minnesota, feature dual inside-outside copper shorting rings in the motor to greatly reduce distortion. This article was originally published in Voice Coil, December 2020.

This Test Bench article addresses an interesting home audio tweeter from Creative Sound Solutions (CSS). The company sent Voice Coil its latest high-end tweeter, the LD25X, a special driver with a unique dual-gap patented XBL2 motor. CSS licenses the XBL2 technology from inventor Dan Wiggins for two of their woofers and for the LD25X tweeter. The XBL2 motor features a short voice coil traveling between two gaps, allowing for a higher Xmax than most conventional motors can provide. The LD25X tweeter features a 25mm silk dome diaphragm and flat silk surround, in a 73 mm diameter six screw cast-aluminum faceplate anodized semi-flat black. This article was originally published in Voice Coil, July 2020.