Fisher 500-B Stereo Receiver (1959)

The Fisher 500-B is a landmark in high-fidelity audio history, representing one of the first integrated stereo receivers designed for the discerning audiophile. Introduced in 1959 and produced through 1961, the 500-B combined a powerful push-pull tube amplifier, FM/AM tuner, and multiplex stereo decoding in a single chassis, housed in a beautifully crafted walnut wood cabinet. Revered for its robust build quality and rich, musical sound, the 500-B remains a sought-after classic among vintage audio enthusiasts.

Specifications

Feature	Specification
Model	Fisher 500-B
Year of Production	1959–1961
Category	Tube Stereo Receiver
Power Output	35 watts per channel (stereo), 70 watts (mono)
Output Tubes	Four 7591 beam power tetrodes
Total Tubes	12 (including 7591, 12AX7, 6BA6, 6AT6, etc.)
Impedance	4, 8, and 16 ohm speaker outputs
Tuner	FM/AM with multiplex stereo capability
Inputs	Phono, Auxiliary, Tape (via external adapter)
Turntable Compatibility	Designed to work with Garrard Type A turntable
Cabinet	Solid walnut wood
Dimensions	19" W × 7.5" H × 12" D
Weight	Approx. 45 lbs

Historical Context

The Fisher 500-B emerged during a pivotal moment in audio history—the transition from mono to stereo broadcasting and recording. As one of Fisher's first true high-fidelity stereo receivers, the 500-B was engineered to deliver exceptional performance with the new stereo LPs and FM broadcasts becoming popular in the late 1950s. Its integration of a multiplex stereo decoder allowed listeners to experience true stereo sound from FM radio, a novelty at the time.

Designed by Avery Fisher, a pioneer in high-fidelity audio, the 500-B reflected a commitment to engineering excellence and sonic purity. It was marketed not just as a component, but as the centerpiece of a premium home audio system. Paired with the Garrard turntable and Fisher speakers, it formed the core of many high-end setups in the early stereo era.

The 500-B's use of the 7591 output tubes—known for their clarity, headroom, and reliability—set it apart from many contemporaries using 6L6 or EL34 tubes. This choice contributed to its dynamic range and clean power delivery, making it a favorite among both audiophiles and collectors.

Sound Signature

The Fisher 500-B delivers a classic tube amplifier sound: warm, smooth, and highly musical. Its rich midrange brings vocals and acoustic instruments to life, while the detailed highs provide clarity without harshness. In stereo mode, the soundstage is wide and well-defined, with excellent imaging for its era. The amplifier’s push-pull design ensures low distortion and strong bass response, especially when driving 8-ohm speakers.

Even by modern standards, the 500-B holds its own in terms of tonal balance and emotional engagement, making it a favorite for jazz, classical, and vocal recordings.

Maintenance and Restoration Tips

Due to its age, the Fisher 500-B requires careful attention to ensure safe and optimal operation. Here are key maintenance considerations:

Capacitor Replacement: The electrolytic and paper capacitors degrade over time and should be replaced (recapped) by a qualified technician to prevent shorts, hum, or damage to other components.
Tube Replacement: While original tubes may still function, testing and replacing weak or noisy tubes (especially the 7591s) will restore performance. Use matched, high-quality NOS or new-production tubes.
Resistor Check: Carbon composition resistors can drift in value; check and replace if out of tolerance to maintain circuit accuracy.
Tuner Alignment: The FM/AM tuner may require realignment for optimal reception. This should be done with proper equipment to avoid overloading the front end.
Cleaning: Use contact cleaner on switches and potentiometers. Clean tube pins and sockets to ensure good connections.
Power Transformer: Monitor for excessive hum or overheating. While generally robust, original transformers can fail after decades of use.
Safety First: Always use a variac and isolation transformer when powering up a long-unused 500-B to avoid catastrophic failure.

Collectibility and Market Value

The Fisher 500-B ranks 8 out of 10 in collectibility due to its historical significance, build quality, and enduring sound. Fully operational units in original condition command premium prices, especially those with matching serial numbers and original tubes.

Market Value: $500–$1,200 USD, depending on condition, originality, and completeness.
High-Value Units: Systems including the original Garrard turntable and remote control can exceed $1,500.
Restoration Potential: Well-restored units often outperform unrestored ones and are more desirable for daily use.

Conclusion

The Fisher 500-B is more than just a vintage amplifier—it's a piece of audio history. As one of the first true stereo receivers, it helped define high-fidelity sound for a generation. With proper care and restoration, the 500-B continues to deliver a listening experience that is both technically impressive and emotionally engaging. For collectors and audiophiles alike, it remains a timeless icon of American audio engineering.