Quad FMII (1970–1976)
The Quad FMII was Quad's first dedicated stereo FM tuner. It earned a reputation for performance, precision engineering and a clean sound. It was designed while FM broadcasting was in its prime, and it is still sought after by vintage audio buyers.
Specifications
| Specification | Detail |
| Year of Production | 1968–1971 |
| Type | Stereo FM Tuner |
| Power Output | N/A (no amplification stage) |
| Impedance | N/A (no speaker output) |
| Sensitivity (Mono) | 2.5 μV for 40 dB S/N ratio |
| Sensitivity (Stereo) | 50 μV for 40 dB S/N ratio |
| Tuning System | Analog dial with mechanical counter |
| Front End | FET (Field-Effect Transistor) |
| Decoder | Phase-locked loop (PLL) multiplex decoder |
| Bandwidth Filters | Switched selectable (Wide/Narrow) |
| Meters | Dual analog meters: Signal Strength and Center-of-Channel |
| Case Finish | Walnut veneer side panels |
| Dimensions | 435 mm (W) × 135 mm (H) × 320 mm (D) |
| Weight | 10.5 kg |
Key Features
- FET Front End: Utilized Field-Effect Transistors in the input stage for low noise and high input impedance, contributing to superior signal clarity.
- PLL Multiplex Decoder: Advanced phase-locked loop system for accurate and stable stereo decoding, minimizing drift and crosstalk.
- Switched Bandwidth Filters: Allowed users to select between wide and narrow IF bandwidths to optimize reception under varying signal conditions.
- Dual Analog Meters: Provided real-time visual feedback on signal strength and tuning accuracy, aiding in precise station alignment.
- High Build Quality: Crafted with a robust chassis, precision tuning mechanism, and elegant walnut side panels typical of Quad’s design ethos.
Historical Significance
The FMII arrived when stereo FM broadcasting was gaining popularity and home hi-fi systems were changing fast. As Quad's first FM tuner, it carried over the sonic purity and technical care already established with their amplifiers and loudspeakers.
Critics and audiophiles praised it for pulling in weak signals clearly and keeping distortion low across the band. The PLL decoder was advanced for its time. It was more stable than the gated decoders that were more common then.
The FMII helped solidify Quad's reputation in high-end audio engineering and influenced the design of later tuners from other manufacturers. It was a favorite among discerning listeners throughout the 1970s.
Sound Signature
The FMII sounds clean, detailed and neutral. It is known for low distortion, excellent stereo separation and precise imaging. The FET input stage keeps signal loading minimal. Users often note that it resolves low-level detail and pulls in marginal stations clearly, especially with a high-quality antenna.
Next to its contemporaries, the FMII avoids coloration. That makes it especially rewarding on strong local stations or when atmospheric conditions favor DX reception.
Maintenance and Restoration Tips
Because of its age, the Quad FMII may need servicing to perform at its best. Common issues and recommended maintenance include:
- Capacitor Replacement: Electrolytic capacitors, particularly in the power supply and decoder circuits, should be replaced if the unit has not been restored. Aging caps can lead to noise, hum, or decoder instability.
- Meter Bulb Replacement: The original bulbs powering the analog meters often fail over time. Modern LED replacements (with appropriate voltage regulation) can be used for longer life.
- Cleaning and Lubrication: Tuning mechanisms and switches should be cleaned with contact cleaner. The tuning capacitor may benefit from inspection and light lubrication if stiff.
- Alignment Check: The IF and RF stages may require realignment using proper test equipment to restore optimal sensitivity and selectivity.
- Noise in Audio or Switches: Noisy pots or switches can usually be resolved with contact cleaner, though worn components may need replacement.
- Antenna Connection: Ensure the 300-ohm twin-lead antenna terminals are secure and corrosion-free. An external balun may improve compatibility with modern 75-ohm coaxial antennas.
Restoration by a technician experienced with vintage Quad equipment is highly recommended to preserve both performance and resale value.
Collectibility and Market Value
The Quad FMII holds a collectibility rating of 7/10. It is prized for its historical significance, build quality and sonic performance. Fully functional or professionally restored units draw strong interest in the vintage audio market.
- Market Value: $300–$600 USD, depending on condition, originality, and restoration quality.
- Factors Affecting Value: Presence of working meters, original finish, clean dial, and documented service history.
- Rarity: Moderately rare; production spanned several years, but surviving units in good condition are increasingly scarce.
Conclusion
The FMII was the company's first move into FM tuning. It has no amplification, so it needs a separate amplifier, and it works as a pure signal source.
For vintage audio collectors and FM enthusiasts, the FMII offers both nostalgic appeal and genuine performance. With proper care and maintenance, it continues to deliver a listening experience that rivals many modern tuners, proving that true high-fidelity design never goes out of style.
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