Fisher XP-55B (1960s)
A compact two-way bookshelf speaker from Fisher’s mid-century lineup, noted for its acoustic suspension design and extended bass response.
Overview
The Fisher XP-55B is a passive, two-way bookshelf speaker produced in the 1960s. Marketed as a "Compact Free-Piston Speaker System," it was designed to deliver full-range sound from a relatively small enclosure. It features a 6-inch bass driver with a free air resonance of 40 Hz—unusually low for its size—and a 12 dB-per-octave inductive-capacitive crossover network that ensures a smooth transition between drivers. The system can be positioned either horizontally or vertically, offering flexibility in setup. Manufactured in Japan during the Mid-Century Modern era, the XP-55B was praised for its natural sound reproduction and compact efficiency.
Specifications
| Product type | 2-way speaker system, bookshelf, passive, acoustic suspension |
| Frequency Response | 37 - 20,000 Hz |
| Maximum Power Rating | 30 W |
| Impedance | 8 ohm |
| Height | 51 cm |
| Weight | 15 pounds (each) |
| Driver configuration | Bass: 1 x 6-inch |
| Free air resonance | 40 Hz |
| Crossover frequency | 1000 Hz |
| Crossover type | 12 dB-per-octave inductive-capacitive network |
Design
The XP-55B uses an acoustic suspension design with long-throw woofers, allowing deep bass reproduction from a compact cabinet. It incorporates a low-loss crossover network that directs frequencies above 1000 Hz to the tweeter and below to the 6-inch woofer, contributing to a seamless tonal balance. The speaker is built for versatile placement, functioning effectively in both horizontal and vertical orientations.
Context
Positioned as an advanced model in Fisher’s line of two-way speaker systems, the XP-55B was promoted for its ability to achieve fine bass reproduction in a small enclosure. It exemplifies the company’s focus on high-fidelity performance during the 1960s, emphasizing natural sound across the audible spectrum.
Market
A pair of Fisher XP-55B speakers was recently acquired for $30 via a Facebook marketplace listing, indicating modest current value among collectors. Some owners have pursued restoration, including recapping crossover components, and there is at least one documented Bluetooth conversion project based on this model.
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