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  2. Polk Audio - Wikipedia

    en.wikipedia.org/wiki/Polk_Audio

    Polk Audio, Inc. is an American manufacturer of audio products best known for its home and automobile speakers. The company also produces a wide range of other audio products, such as amplifiers and FM tuners. The company's headquarters is in San Diego, California. In 2006, it was bought by Directed Electronics. [1]

  3. Audio system measurements - Wikipedia

    en.wikipedia.org/wiki/Audio_system_measurements

    Maintenance engineers make them to ensure equipment is still working to specification, or to ensure that the cumulative defects of an audio path are within limits considered acceptable. Audio system measurements often accommodate psychoacoustic principles to measure the system in a way that relates to human hearing.

  4. Aerostar R40S Festival - Wikipedia

    en.wikipedia.org/wiki/Aerostar_R40S_Festival

    Data from Aerostar operating manual General characteristics Crew: one Capacity: one passenger Length: 6.74 m (22 ft 1 in) Wingspan: 9.17 m (30 ft 1 in) Height: 2.47 m (8 ft 1 in) Wing area: 13.97 m 2 (150.4 sq ft) Empty weight: 354 kg (780 lb) with Rotax ULS912 engine Gross weight: 535 kg (1,179 lb) Fuel capacity: 80 litres (18 imp gal; 21 US gal) Powerplant: 1 × Rotax 912ULS four cylinder ...

  5. Valve audio amplifier technical specification - Wikipedia

    en.wikipedia.org/wiki/Valve_audio_amplifier...

    Thus, valves with low noise at high frequency do not necessarily have low noise in the audio frequency range. For special low-noise audio valves, the frequency at which 1/f noise takes over is reduced as far as possible, maybe to something like a kilohertz. It can be reduced by choosing very pure materials for the cathode nickel, and running ...

  6. Honda R engine - Wikipedia

    en.wikipedia.org/wiki/Honda_R_engine

    The Honda R engine is an inline-four engine launched in 2006 for the Honda Civic (non-Si). It is fuel injected, has an aluminum-alloy cylinder block and cylinder head, is a SOHC 16-valve design (four valves per cylinder) and utilizes Honda's i-VTEC system.

  7. Cambridge Audio - Wikipedia

    en.wikipedia.org/wiki/Cambridge_Audio

    Cambridge Audio became a standalone business from the group when a new company, Cambridge Audio Laboratories Ltd, was formed, operating from the old Enderby's Mill in St. Ives, Cambridge. The P40 was an immediate success, but would prove difficult to manufacture in any volume, a problem that would be resolved in 1970 with the introduction of ...

  8. R40 - Wikipedia

    en.wikipedia.org/wiki/R40

    R40 (New York City Subway car) Chloromethane, a refrigerant; R40: Limited evidence of a carcinogenic effect, a risk phrase; R40 Live Tour, a 2015 tour by Canadian rock band Rush; R40 series of preferred numbers; Renault R40, a French tank; Rover 75, an executive car; Samsung Sens R40, a laptop; Toyota TownAce (R40), a Japanese van

  9. R40 Live Tour - Wikipedia

    en.wikipedia.org/wiki/R40_Live_Tour

    The R40 Live Tour was the final concert tour by Canadian rock band Rush that commemorated the 40th anniversary of drummer Neil Peart joining the band in July 1974. The title hearkens back to Rush's 2004 R30: 30th Anniversary Tour that celebrated the 30th anniversary of the band. The tour grossed US$37.8 million, with 442,337 tickets sold at 35 ...