Bozak B-400 (late 1950s)
The Bozak B-400 shows up in Bozak's own advertising from the late 1950s as the company's large, top-tier lowboy system. No independent period review of it has surfaced in the archive, so everything here comes from the manufacturer's ads. A February 1957 spread in High Fidelity (Feb 1957, p.25) called the B-400 a "distinguished" lowboy speaker system covering 28 to 16,000 cycles, with 8-ohm impedance, 50-60 watts power handling, and "room-wide" coverage. It used fourteen drivers - four bass, two mid-range, and eight treble - with infinite baffling, which Bozak claimed preserved the drivers' precision, balance, and purity.
By mid-1959, Bozak advertising in Audio (July 1959, p.45) grouped the B-400 with the magnificent B-310A at the top of the line, above the smaller new "Spinet" models. That is about all the documented record offers. There are no independent measurements, no price list entry, no service manual and no production dates. The B-400 was clearly Bozak's big-system statement of the period, but the surviving evidence is advertising copy, not editorial coverage.
Known specs from the period ad:
- Fourteen drivers: 4 bass, 2 mid-range, 8 treble
- Frequency range: 28–16,000 cycles
- Impedance: 8 ohms
- Power handling: 50–60 watts
- Infinite-baffle lowboy enclosure
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