Fisher CORONET-II (C-55) (1964)

Name: Fisher CORONET-II (C-55)
Brand: Fisher

The Fisher CORONET-II (C-55) is a vintage stereo receiver introduced in 1964 by Fisher Electronics, a company renowned for its high-fidelity audio equipment during the golden era of analog sound. As part of Fisher’s mid-tier lineup during the early to mid-1960s, the CORONET-II (C-55) exemplifies the transition from tube-based amplification to more compact, reliable designs while maintaining the audiophile-grade performance the brand was known for.

Design and Build Quality

Fisher, founded by Avery Fisher in 1945, built its reputation on precision engineering and high-end audio reproduction. The CORONET-II (C-55) reflects this legacy with its robust construction, heavy-duty chassis, and classic mid-century styling. The receiver features a brushed aluminum front panel with a distinctive center-mounted VU meter flanked by large tuning and volume knobs. The meter, a hallmark of Fisher designs from this period, provides visual feedback on signal strength and output levels, adding both functional and aesthetic value.

The unit measures approximately 19 inches wide, 6.5 inches high, and 15 inches deep, with a weight of around 35 pounds—typical for tube-based or hybrid receivers of the era. The build quality is exceptional, with point-to-point wiring and high-grade components used throughout. The chassis is designed for optimal heat dissipation and mechanical stability, contributing to long-term reliability.

Technical Specifications

The CORONET-II (C-55) is rated at 35 watts per channel into 8 ohms, with low harmonic distortion (typically under 1%) and a frequency response of 20 Hz to 20 kHz, ±1 dB. These specifications were impressive for a mid-range receiver in the mid-1960s and allowed the unit to drive a wide range of speakers effectively, including popular models from AR, Advent, and KLH.

The receiver combines a tube-based AM/FM tuner section with a solid-state (transistorized) amplifier stage, representing a transitional design that leveraged the warmth of tubes in the signal path while benefiting from the efficiency and reliability of transistors in the power output. This hybrid architecture was a strategic move by Fisher to balance performance, cost, and durability.

Key specifications include:

Tuner Section:
AM sensitivity: 50 µV for 20 dB S/N
FM sensitivity: 1.5 µV for 30 dB S/N
FM capture ratio: 2 dB
IF frequencies: AM 455 kHz, FM 10.7 MHz
Stereo separation: >30 dB at 1 kHz

Audio Section:
Total harmonic distortion: <1% at full power
Input sensitivity: 2.5 mV (phono), 150 mV (aux/line)
Signal-to-noise ratio: >60 dB (phono), >70 dB (line)
Tone controls: Bass ±12 dB at 50 Hz, Treble ±12 dB at 10 kHz
Headphone output: 1/4" jack with impedance matching

General:
Power consumption: 220 watts
Fuse: 2A slow-blow
Speaker outputs: Dual binding posts for A/B speakers

Features and Functionality

The CORONET-II (C-55) offers a comprehensive set of features for its time. It includes:

AM/FM Stereo Tuner: The tuner section provides excellent reception with a built-in ferrite AM antenna and a 75-ohm FM dipole terminal. The stereo decoder circuitry allows for true stereo FM broadcasts, which were becoming more common in the mid-1960s.

Phono and Line Inputs: The receiver supports both magnetic and ceramic phono cartridges (switchable), making it compatible with a wide range of turntables. It also includes two auxiliary inputs for tape decks or other line-level sources.

Tape Monitoring and Recording Loops: One of the advanced features for its era, the CORONET-II includes a tape monitor function and dual tape loops, allowing users to record from any source to an external tape deck and monitor the playback.

Dual Speaker Outputs: The ability to switch between two sets of speakers (A/B) or run them simultaneously was a premium feature at the time, offering flexibility in multi-room setups.

Loudness Compensation: A toggle switch engages loudness contouring, which boosts bass and treble at lower volumes to compensate for the ear’s reduced sensitivity, a feature appreciated for late-night listening.

Sound Characteristics

The sound signature of the Fisher CORONET-II (C-55) is often described as warm, smooth, and detailed—typical of tube-based front ends. The hybrid design contributes to a rich midrange and natural tonality, especially with acoustic and vocal recordings. The FM tuner delivers clear, stable stereo reception with good channel separation, and the phono stage provides quiet, well-balanced amplification for vinyl playback.

While not as powerful as some of Fisher’s flagship models like the 500C or 800R, the 35-watt output is sufficient for moderate-sized rooms and efficient speakers. The damping factor is moderate by modern standards, which can result in a slightly "loose" bass response with certain speakers, but many enthusiasts appreciate this as part of the vintage character.

Historical Context and Collectibility

The CORONET-II (C-55) was released during a pivotal time in audio history. The early 1960s saw the rise of stereo broadcasting, the growing popularity of FM radio, and the increasing adoption of home stereo systems. Fisher positioned itself as a leader in this market, competing with brands like Marantz, Scott, and Harman Kardon.

While not as rare or celebrated as some of Fisher’s flagship models, the CORONET-II (C-55) is sought after by collectors and vintage audio enthusiasts for its combination of performance, build quality, and classic design. Units in good working condition with original cosmetics can command prices between $400 and $800, depending on market demand and restoration quality.

Restoration of the CORONET-II requires care, particularly with the tube complement (typically 6AT6, 6BA6, 12AT7, 12AV6, and 5Y3GT) and electrolytic capacitors, which degrade over time. Recapping the power supply and replacing worn tubes are common steps in bringing a vintage unit back to optimal performance.

Conclusion

The Fisher CORONET-II (C-55) stands as a testament to the craftsmanship and engineering excellence of 1960s American audio manufacturing. As a hybrid receiver, it bridges the gap between the tube era and the transistor revolution, offering a compelling blend of warmth, reliability, and functionality. Whether used as a centerpiece in a vintage hi-fi system or appreciated as a collectible, the CORONET-II (C-55) continues to deliver a listening experience that modern digital gear often struggles to replicate. Its enduring appeal lies in its honest sound, timeless design, and the legacy of a brand that helped define high-fidelity audio for a generation.

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