Wharfedale SUPER-12/CS/AL: The Forgotten Studio Monitor of the Late 1970s

Wharfedale has made British loudspeakers since the 1930s, and it is known for a warm, natural sound. The Diamond and Linton series get most of the attention from collectors today. The SUPER-12/CS/AL is a lesser-known model: a professional speaker enclosure developed in the late 1970s for studio and broadcast use.

The consumer models sat in living rooms across the UK. The SUPER-12/CS/AL was built for function, durability, and sonic accuracy under demanding conditions. It isn't widely documented, but surviving units and service manuals confirm it was part of Wharfedale's "Super" series of professional monitors, designed for radio stations, recording studios, and public address installations.

Technical Specifications

The “CS” in the model name is believed to stand for Constant Source, a design philosophy Wharfedale employed to ensure consistent dispersion and time alignment across the frequency spectrum. The “AL” suffix may denote Aluminum components—possibly referring to the voice coils or horn-loaded tweeter assembly—though this remains speculative due to limited documentation.

Sound Characteristics and Performance

The SUPER-12/CS/AL was engineered for clarity and neutrality, which is what professional monitoring calls for. The 12-inch bass driver has a doped paper cone and a large rubber surround. It delivers tight, controlled low-end response down to 45 Hz, which was remarkable for its era, and it does it without port-tuning exaggeration. The midrange driver is a 3-inch unit with a phase plug. It keeps vocals clear with minimal coloration, which matters for voice-over and broadcast work.

The tweeter is a horn-loaded 1-inch dome, likely made from titanium or aluminum. It offers extended high-frequency response with low distortion. It is paired with a steep 18 dB/octave crossover network, and the result is a coherent soundstage with excellent transient response.

In practice, the SUPER-12/CS/AL has a balanced tonal profile. The lower mids are warm, which is a hallmark of Wharfedale's voicing. The upper mids are neutral, and the highs are crisp but not harsh. The bass is punchy rather than bloated, which suits monitoring rhythm sections or broadcast audio where clarity trumps boominess.

It was not as refined as later studio monitors like the Tannoy 6000 series or the Yamaha NS-10. It was a cost-effective, robust alternative for regional studios and radio stations while British public broadcasting was expanding rapidly.

Notable Features and Innovations

What sets the SUPER-12/CS/AL apart from its contemporaries is its hybrid design approach, which merges Wharfedale's musical heritage with the rugged demands of professional use.

• Reinforced Cabinet Construction: Unlike consumer cabinets of the time, the SUPER-12/CS/AL uses thick birch plywood with internal cross-bracing to minimize cabinet resonance—critical for accurate monitoring.
• Dual Binding Posts: The rear panel includes dual input terminals, allowing for bi-wiring or bi-amping, a rare feature in professional monitors of this era.
• Adjustable EQ DIP Switches: Some units feature a small access panel on the rear with DIP switches for high- and low-frequency shelving (±2 dB), enabling room compensation—a forward-thinking inclusion for the late 1970s.
• Rear-Firing Bass Reflex Port: Positioned to reduce boundary coupling, this design allows for flexible placement in control rooms and live rooms.
• Industrial Mounting Points: Integrated threaded inserts on the top, bottom, and sides suggest compatibility with speaker stands, wall mounts, or flown arrays—unusual for a speaker of this size at the time.

These features indicate that Wharfedale was aiming for a professional market that valued flexibility, durability, and sonic precision.

Common Issues and Maintenance

Because of their age and specialized use, surviving SUPER-12/CS/AL units are rare and often need restoration. Common issues include:

• Aged Foam Surrounds: The original foam on the bass and midrange drivers degrades over time, leading to flaking and loss of compliance. Replacement with modern butyl rubber surrounds is recommended.
• Crossover Component Drift: Electrolytic capacitors in the crossover network may dry out, altering frequency response. Rebuilding the crossover with modern polypropylene capacitors and metal-film resistors can restore original performance.
• Grille Fabric Deterioration: The original perforated steel grilles are durable, but the inner acoustic fabric often tears. Replacement with acoustically transparent material is advised.
• Finish Wear: The textured paint is durable but prone to chipping. Some owners refinish cabinets in black textured vinyl or professional-grade paint for a cleaner look.

Finding original drivers is hard. Some European speaker rebuilders have made compatible replacements based on original schematics.

Current Market Value and Collectibility

The Wharfedale SUPER-12/CS/AL is a niche collector's item, with fewer than 50 known surviving units in private collections worldwide. It does not command the high prices of vintage consumer classics like the Wharfedale Airedale or the Linton 80, but its rarity and professional pedigree are gaining attention.

• Restored Units: £400–£700 per pair (UK market)
• Unrestored Units: £150–£250 per pair
• Complete Sets with Original Documentation: Premium of 30–50%

Interest is strongest among:

• Vintage broadcast equipment collectors
• Studio restoration enthusiasts
• Wharfedale brand loyalists

Its value is likely to rise as awareness grows and original parts become scarcer.

Conclusion and Legacy

It was never mass-produced or widely advertised, but the SUPER-12/CS/AL served reliably in radio booths and small studios across the UK and Commonwealth nations. It is a rugged, sonically honest speaker with professional-grade build.

Though never mass-produced or widely advertised, the SUPER-12/CS/AL served reliably in radio booths and small studios across the UK and Commonwealth nations during a pivotal era in audio history. Today, it offers a unique opportunity: a rugged, sonically honest speaker that delivers vintage British character with professional-grade build.

The SUPER-12/CS/AL is a forgotten model that collectors and restorers are starting to rediscover.

Similar items on eBay

No exact Wharfedale SUPER-12/CS/AL listings are live right now — these searches show current Wharfedale and similar vintage audio gear on eBay:

As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.

Related Models

• Wharfedale 100
• Wharfedale 20
• Wharfedale CHEVIN (1978)
• Wharfedale DENTON-3 (1994)
• Wharfedale MACH 9
• Braun AUDIO-1 (1965)
• Braun AUDIO-250 (1965)
• Magnavox Component Systems (1972)
• Acoustic Research AR (1967-1976)
• Acoustic Research 11