The

Wharfedale Wharfedale ( ) is the valley of the upper parts of the River Wharfe and one of the Yorkshire Dales. It is situated within the districts of Craven and Harrogate in North Yorkshire, and the cities of Leeds and Bradford in West Yorkshire. It i ...

MACH series of

loudspeaker A loudspeaker (commonly referred to as a speaker or speaker driver) is an electroacoustic transducer that converts an electrical audio signal into a corresponding sound. A ''speaker system'', also often simply referred to as a "speaker" or ...

s consists of the MACH 3, 5, 7, and 9. This is an informational page devoted to owners and users of these loudspeakers and those interested in history and construction of electronic

sound reproduction Sound recording and reproduction is the electrical, mechanical, electronic, or digital inscription and re-creation of sound waves, such as spoken voice, singing, instrumental music, or sound effects. The two main classes of sound recording ...

. These loudspeakers were manufactured at Rank Hi-Fi, Wharfedale Works in West Yorkshire by Wharfedale Loudspeakers in England ( UK). They were featured in

the Gramophone ''Gramophone'' is a magazine published monthly in London, devoted to classical music, particularly to reviews of recordings. It was founded in 1923 by the Scottish author Compton Mackenzie who continued to edit the magazine until 1961. It was ...

magazine in July 1982. This range of high-efficiency ( hi-fi) loudspeakers were released to replace their "E" Series of loudspeakers. They were originally launched with prices from £200 to £430 per pair. The drive units boasted a high sensitivity due to care in design and construction. The tweeters (one per speaker) use horn-loaded compression. The woofers and mids use lightweight fibre cones with ceramic magnets and ventilated aluminium coils. The cabinets were made out of wood and were marketed for bass reflex. The cabinets have modular front baffles made from styrofoam (polystyrene) with open-weave steel-mesh grilles. Opaque clip-on grilles were also supplied and all the speakers have LED power displays and re-settable

overload protection A power supply is an electrical device that supplies electric power to an electrical load. The main purpose of a power supply is to convert electric current from a source to the correct voltage, current, and frequency to power the load. As a res ...

. There are adjustable dials to control the midrange 100mm driver (tweeter on Mach 3 and mid on Machs 5, 7, and 9)

Specifications

Mach 3

*1x25mm Treble: horn-loaded compression tweeter *1x200mm Bass Woofer lightweight fibre cone *Crossover frequency 5 kHz¿ *Sensitivity: 94dB for 1 Watt at 1 metre *Enclosure volume: 30 Litres *Impedance: 8 Ohms *Power handling: 100 Watts *Recommended amplifier power rating: 10-100 Watts *Frequency range: 55 Hz to 22 kHz (DIN45500) *Frequency range (±3dB): 62 Hz to 17 kHz *Sensitivity: 94dB for 1 Watt at 1 metre (Anechoic) *Computer optimized bass loading

Mach 5

*1x25mm Treble: horn-loaded compression tweeter *1x100mm Mid: lightweight fibre cone *1x200mm Bass: lightweight fibre cone woofer *Enclosure volume: 30 Litres *Impedance: 8 Ohms *Power handling: 125 Watts *Recommended amplifier power rating: 20-125 Watts *Frequency range: 55 Hz to 22 kHz (DIN45500) *Frequency range (±3dB): 62 Hz to 17 kHz *Sensitivity: 94dB for 1 Watt at 1 metre (Anechoic) *Computer optimized bass loading

Mach 7

*1x25mm Treble: horn-loaded compression tweeter *1x100mm Mid: lightweight fibre cone *1x250mm Bass: lightweight fibre cone woofer *Enclosure volume: 50 Litres *Impedance: 8 Ohms *Power handling: 150 Watts *Recommended amplifier power rating: 20-150 Watts *Frequency range: 48 Hz to 22 kHz (DIN45500) *Frequency range (±3dB): 55 Hz to 17 kHz *Sensitivity: 94dB for 1 Watt at 1 metre (Anechoic) *Computer optimized bass loading

Mach 9

*1x25mm Treble: horn-loaded compression tweeter *2x100mm Mid: lightweight fibre cone *1x250mm Bass: lightweight fibre cone woofer *Enclosure volume: 70 Litres *Impedance: 8 Ohms *Power handling: 200 Watts *Recommended amplifier power rating: 20-200 Watts *Frequency range: 43 Hz to 22 kHz (DIN45500) *Frequency range (±3dB): 50 Hz to 17 kHz *Sensitivity: 94dB for 1 Watt at 1 metre (Anechoic) *Computer optimized bass loading

Competitors

Some competing loudspeakers sold at the time were the Bose 901 Series IV and V, Bose 201 Series I, Bose Series 601 Series II,

JBL JBL is an American audio equipment manufacturer headquartered in Los Angeles, California, United States. JBL serves the customer home and professional market. The professional market includes studios, installed/tour/portable sound, cars, music ...

Delta, Cerwin Vega D series, JBL Radiance, JBL Sigma, and

Acoustic Research Acoustic Research was a Cambridge, Massachusetts-based company that manufactured high-end audio equipment. The brand is now owned by VOXX. Acoustic Research was known for the AR-3 series of speaker systems, which used the acoustic suspension wo ...

AR-58B.

References

{{reflist Loudspeakers