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Biamp goes to Court
 The Adelaide Commonwealth Law Courts building represents one of the largest judicial A/V jobs to date. There are 22 courtrooms - including an Indigenous courtroom - in the new building which accommodates the High Court of Australia, Federal Court of Australia, Family Court of Australia and Federal Magistrates Court of Australia. Full story
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 AKG’s new professional general-purpose condenser microphones
Ground-breaking, high-quality AKG large-diaphragm recording microphones have defined the international studio standard for decades. The new PERCEPTION 100 and PERCEPTION 200 microphones are based on AKG’s nearly six decades of experience. Full story
AKG’s ultimate tool for professional DJs
 The K 181 DJ have been designed in cooperation with leading international DJs. The result: the ultimate tool for professional DJs – high performance closed-back headphones with the best possible sound, and maximum SPL that should be exceptionally rugged and easy to bend or fold into any listening position, and provide a switchable bass boost. Full story
Peavey ValveKing™ Guitar Amps bring boutique features & tone
 The Peavey ValveKing Series is a new, all-tube guitar amp line combining boutique features and hot-rodded tones with legendary Peavey reliability. ValveKing amps feature a patent-pending, variable Class A-A/B control called Texture™, which allows sweepable selection between Class A and Class A/B power structures, as well as any combination of the two. Full story
TOA launches second phase of N-8000 series IP network intercom products
 TOA Electronics, Inc. is expanding their N-8000 Series IP Network Intercom with several new options for increased system flexibility. The system expansion begins with the new N-8500MS IP Multi-function Master Station, which has a built-in Ethernet connection for direct network connection, a 32 character alphanumeric LCD display, and handset and speed dial functions.
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 Aiphone - Hearing your customers
How New Zealand’s Wellington Railway Station ticket counters benefit from a Security Window Intercom from AIPHONE. Full story
 AKG Technology Facilitates Large Meetings for Austria's US Embassy
While much of diplomacy occurs behind the scenes, public events are an important part of any embassy’s role. The Austrian Embassy in Washington, D.C. recently chose Advanced AV Federal Solutions Group (Advanced FSG) to help modernize its communications systems. Full story
 Peavey Wins MMR Dealer's Choice Award
For the sixteenth year in a row, musical instrument and sound reinforcement retailers from across the U.S. have honoured Peavey with a Dealers' Choice Award through Musical Merchandise Review (MMR) magazine.
Full story
APG to exhibit at CEDIA 2006
 Audio Products Group is pleased to announce that we will once again be exhibiting at the annual CEDIA (Custom Electronics Design and Installation Association) EXPO, taking place on the Gold Coast in Queensland July 27-29, 2006. Full story
 DN-S3500 wins Music & Sound Retailer Award 2006
The Denon DN-S3500 continues to receive industry recognition with the latest award from The Music & Sound Retailer. The DN-S3500 was awarded Best New DJ Product of 2006.
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Headphones impedance
The two important electrical specifications for a pair of headphones are the impedance of the phone transducer itself and its on-the-ear sensitivity.
So-called low impedance headphones may vary from 75 ohms up to about 150 ohms. Phones in this impedance range may be directly plugged into the headphone jack routinely found on recording and playback equipment. Higher impedances, such as 600 ohms, are more useful in studio installations where many units may be wired in parallel for studio monitoring applications.
Headphone sensitivity is usually stated as the in-the-ear sound pressure level produced by one milliwatt (mW) of audio input. Typical sensitivity ratings of AKG headphones run from 88 dB per mW to 105 dB per mW. You can see that very little power is needed to drive a stereo headphone pair to very high listening levels.
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Fast Facts |
Farthest Distance Travelled By A Human Voice
The normal intelligible outdoor range of the male human voice in still air is 180 meters (200 yd). Silbo, the whistled language of the Spanish-speaking inhabitants of the Canary Island of La Gomera, is intelligible under ideal conditions at 8 km (5 miles). There is one recorded case of the human voice being detectable at a distance of 17 km (10.5 miles) across still water at night.
Largest Concert Audience For A Rock Artist
The largest paying audience ever attracted by a solo performer was an estimated 180,000–184,000, in the Maracanã Stadium, Rio de Janeiro, Brazil, at a Paul McCartney concert held on April 21, 1990.
© Guiness World Records
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