Wharfedale E70: The British Open-Baffle Classic

In the 1970s, British hi-fi had a lot of big names, and Wharfedale was one of them. Its loudspeakers sat in plenty of serious listeners' homes in the UK and beyond. The Wharfedale E70 is one of the odd ones in the lineup - a large open-baffle speaker that skipped the usual cabinet.

The E70 is not as well documented as Wharfedale's mainstream models like the Diamond or Linton series. It came out of a period of experimentation, when engineers were looking for alternatives to the enclosed cabinet to cut coloration and boxy resonance. Wharfedale's answer was a full-range, open-baffle system designed to give a room-filling soundstage with clarity and openness.

Historical Context and Design Philosophy

The E70 appeared in the early 1970s, circa 1972. Transistor amplifiers were gaining ground, but many listeners still favored tube amps and a smooth, musical presentation. Wharfedale, under engineers influenced by founder Gilbert Briggs, stuck to the idea that speakers should reproduce music in a way that felt engaging and true to life.

The E70 followed that idea with an open-baffle (or open-back) design. Most speakers put the drivers in a sealed or ported cabinet. The E70 mounted its drivers on a large, flat baffle, so sound radiated both forward and backward. That removed many of the resonances and standing waves that come with enclosures, and gave a more natural midrange and a spacious, three-dimensional soundstage.

It is a big speaker. It stands over four feet tall, with a wide wooden baffle in high-quality walnut veneer and a minimalist look. The drivers are arranged symmetrically.

Technical Specifications

Specification	Detail
Model	Wharfedale E70
Year of Introduction	1972
Type	Open-baffle, full-range loudspeaker
Driver Complement	1 x 12" bass driver, 1 x 5" midrange, 1 x 1" dome tweeter
Frequency Response	45 Hz – 20 kHz (approximate)
Sensitivity	88 dB (1W/1m)
Nominal Impedance	8Ω (compatible with most tube and solid-state amps)
Crossover Type	2nd-order passive crossover
Baffle Type	Open, free-standing
Dimensions (H×W×D)	140 cm × 60 cm × 20 cm (approx. 55" × 24" × 8")
Weight	~25 kg (55 lbs) per speaker
Recommended Amp Power	25–100 watts

It’s worth noting that the E70’s open-baffle design has implications for bass response. Without a sealed cabinet to reinforce low frequencies, the bass rolls off gradually below 50 Hz. This means the E70 delivers tight, articulate midbass but lacks the deep sub-bass of a ported or transmission-line design. However, many owners appreciate this trade-off for the clarity and lack of “boom” it provides.

Sound Characteristics and Performance

The sound of the Wharfedale E70 is open, airy, and remarkably transparent. With no cabinet, the midrange breathes, and vocals are often praised for realism and immediacy. Acoustic guitars, pianos, and strings come through with natural timbre and precise imaging.

The tweeter gives smooth highs without harshness, which is typical of Wharfedale's driver design. Cymbals shimmer without sibilance, and orchestral overtones stay fine-grained. The midrange driver is where the E70 really shines - its cone material and motor system were optimized for low distortion, which helps the vocal presence.

Bass is fast and articulate, though not overly deep. The open-baffle design makes a dipole radiation pattern, so bass energy cancels at low frequencies, especially with the speaker close to a wall. Placed correctly, typically several feet from the rear wall, the E70 can produce a surprising amount of bass with excellent integration.

Stereo imaging is exceptional. The wide baffle and dipole dispersion give a broad, deep soundstage that can fill a large room with a concert-hall-like ambience. Listeners often report that the speakers seem to disappear, leaving only the music hanging in space.

Notable Features and Innovations

Open-Baffle Design: A rare approach in mass-market speakers, aimed at reducing cabinet coloration.
High-Quality Driver Materials: Wharfedale used custom-designed cones and silk dome tweeters for smooth, fatigue-free listening.
Passive Radiator Effect: The rear-firing sound from the bass driver interacts with the room, creating a natural bass reinforcement when properly placed.
Elegant Wood Veneer Finish: Available in walnut or rosewood, the E70 was as much a piece of furniture as a speaker.

Common Issues and Maintenance

Because of their age, surviving Wharfedale E70s may need restoration. Common issues include:

Aged Foam Surrounds: The 12" bass driver likely has foam surrounds that have perished over time. Re-foaming or reconing is often necessary.
Capacitor Drift in Crossovers: Electrolytic capacitors in the crossover network may have degraded, leading to imbalanced frequency response. Replacing them with modern audiophile-grade components can restore performance.
Cabinet Warping: The large baffle can warp if exposed to humidity or temperature fluctuations. Check for flatness and structural integrity.
Grille Fabric: Original grilles may be torn or discolored. Replacement fabric in period-correct colors is available from specialty suppliers.

Restoration is generally feasible, and many vintage audio enthusiasts think the E70 is worth the effort for its sonic character.

Current Market Value and Collectibility

The Wharfedale E70 is a rare find today. It was never made in the same numbers as Wharfedale's more popular models, and its size makes it hard to fit into modern living spaces. Original, fully functional pairs in good condition can command $800 - $1,500, depending on restoration quality and market demand.

Collectors value the E70 for its sound, and also as a historical artifact of British hi-fi innovation, from a time when speaker engineering was changing fast. The open-baffle approach also appeals to a niche group of listeners who put sonic purity ahead of bass extension.

Conclusion and Legacy

The Wharfedale E70 may not be the most famous speaker in the brand’s storied history, but it is undoubtedly one of the most interesting. It embodies a philosophy of sonic honesty and design courage that defined the best of 1970s British audio engineering. For those willing to accommodate its size and quirks, the E70 offers a listening experience that is spacious, engaging, and refreshingly free of artifice.

While modern speakers may outperform it in raw specifications, few match the E70’s ability to make music feel alive and present. It remains a testament to Wharfedale’s enduring commitment to musicality over measurement—a true classic for the discerning vintage audio enthusiast.

Market Value

┌──────────────────────────────────────────────────────────────────────────┐
│ WHARFEDALE E70                                                  Nov 2026 │
├──────────────────────────────────────────────────────────────────────────┤
│ High      $564                                    Latest            $195 │
│ Median    $151                                    Trend                — │
│ Low       $46                                     Volume           ~6/mo │
├──────────────────────────────────────────────────────────────────────────┤
│   $600 ┤                                                                 │
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│        │                                                                 │
│   $343 ┤                                                                 │
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│        │       .                   .                                     │
│     $0 ┤                           .                                     │
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│    vol │▁      ▁  ▁                █      ▁         ▁          ▁        ▁│
│        └─────────────────────────────────────────────────────────────────│
│         2026-01                      2026-02                      2026-03│
└──────────────────────────────────────────────────────────────────────────┘

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