BOSTON ACÚSTICS CR57 // A WELL-KEPT SECRET // Circa 2004 the Compact Reference line from Boston Acoustics. Nowadays you can get it for as low as 50$ to 100$ that's SUPER BUDGET ! This is a REALLY SMALL but mighty bookshelf. Paired with a subwoofer makes for a super enjoyable combo!
Why measure it? It has a WAVEGUIDE plus phase correction on the tweeter, a small
4 1⁄2" midrange unit which makes for good dispersion/directivity and has phase plug for power handling, a really small cabinet that makes it naturally sturdy (not enough panel size to resonate).
- Finite Element Analysis (FEA) and 3D modeling to optimize the geometry of both the cone and the surround.
- Kortec® soft dome tweeter (proprietary material) mounted in an innovative new wide dispersion projection tweeter baffle.
- Ferrofluid and an extruded aluminum heat sink combine to improve the tweeter’s power handling and reliability.
- Bass and Midrange units utilize phase plugs that conduct heat away from the voice coil, thus increasing power handling and maximizing output.
- Drivers are positioned very close to each other for smooth, uniform radiation in both the horizontal and vertical planes.
- Deep Channel™ Design pole plate enables the voice coil to travel farther without bottoming out
- Rear-mounted vent is smoothly flared to reduce port turbulence
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