Fisher 800-(a) Amplifier

The Fisher 800-(a) is a stereo receiver from 1959. It puts the amplifier and tuner in one tube-powered box. Audiophiles and collectors still rate it as one of Fisher's best-known models.

Specifications

Historical Context

The 800-(a) came out as stereo recordings were catching on and home hi-fi systems were becoming status symbols. It combined a push-pull tube amplifier, a sensitive FM/AM tuner, and a preamplifier in a single chassis - which made it a rare "complete" receiver for its time.

The walnut cabinet, clean layout, and prominent tuning meter gave it a good look in a living room. It was also ready for a multiplex stereo adapter, so owners could add FM stereo broadcasting later.

Fisher was founded by Avery Fisher and was known for uncompromising standards in audio fidelity. The 800-(a) is frequently cited as one of the greatest tube receivers ever made, with a natural, musical sound.

Sound Characteristics

The 800-(a) is known for a warm, smooth, and engaging sound. Four 7189 output tubes in a push-pull configuration give it 32 watts per channel, which is plenty for efficient speakers of the era. The tube signal path gives a rich midrange and silky highs, with a harmonic richness that helps vocals and acoustic instruments.

The preamplifier and tuner sections are also of exceptional quality, preserving signal integrity and keeping noise down. When properly restored, the 800-(a) can hold its own against many modern amplifiers in musicality and tonal balance.

Maintenance and Restoration Tips

Because of its age, most Fisher 800-(a) units need careful restoration to run safely and well. Here are key considerations:

• Capacitor Replacement: Replace all electrolytic and paper capacitors. Aging capacitors can leak, cause hum, or damage other components.
• Tube Testing and Replacement: Test all tubes (especially the 7189 output tubes) for wear. NOS (New Old Stock) or high-quality modern equivalents are recommended.
• Resistor Check: Carbon composition resistors often drift in value over time. Check and replace as needed to maintain proper bias and performance.
• Cleaning Controls: Use contact cleaner on volume, tone, and selector knobs to eliminate crackling or noise.
• Power Supply Inspection: Inspect the power transformer and wiring for signs of overheating or insulation breakdown.
• Bias Adjustment: Ensure output tubes are properly biased after replacement to prevent premature failure or distortion.
• Safety First: Use a variac and isolation transformer during initial power-up to avoid damaging the unit or creating hazards.

Regular maintenance and proper ventilation will extend the life of the unit.

Collectibility and Market Value

The Fisher 800-(a) is highly collectible and earns a 9/10 on the collectibility scale. Its performance, design, and historical significance make it a centerpiece for vintage audio enthusiasts.

• Market Value: $800 – $2,500
• Unrestored, non-working: $800–$1,200
• Fully restored, original parts: $1,800–$2,500
• Original condition with documentation: Premium value possible

Originality, cabinet condition, and provenance significantly affect value. Units with original tubes and manuals command higher prices.

Conclusion

The Fisher 800-(a) is a landmark in audio history, with an elegant design and solid construction. It still draws audiophiles over six decades after its debut, whether used as a daily driver or kept as a collector's item.

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Related Models

• Fisher 500-B (1959–1961)
• Fisher 700-t (1962)
• Fisher C-55 (1959)
• Fisher 400-R (1963)
• Fisher 400-T (1964)
• Marantz 2226 (1974-1976)
• Marantz 2226B (1979-1980)
• Marantz 2235 (1974-1977)
• Marantz 2238B (1978-1980)
• Marantz 2250B (1978-1980)