BATTERY UNIVERSITY: A free educational website that offers hands-on battery information to

Battery University™ is a free educational website that offers hands-on battery information to engineers, educators, media, students and battery users alike. The tutorials evaluate the advantages and limitations of battery chemistries, advise on best battery choice and suggest ways to extend battery life. The material is based on “Batteries in a Portable World – A […]

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Get the midbass right

Paul McGowan …… AGB’s latest column has been uploaded and for those of you interested to see what the Audio Hitman has to say about EQ’ing your system and frequency response in general, go here to read the article.  For the faint of heart, I recommend abstaining. As I worked through the setup of the […]

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” … if you have to accept distortion products, might as well make them pleasing.”

Paul McGowan writes ….. Every device type we might choose to design an output stage or an amplifier of any kind has inherent distortion products.  These distortions are different in a current amplifying device (like a bipolar transistor) than they are in a voltage amplifying device (like a FET or tube). The differences are in […]

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LOUDSPEAKER MEASUREMENTS: Axiom, B&W, Dahlquist, Focal, JBL, Magico, Morel, PSB and many more

Written in 2009 They write ….. With the cooperation of Canada’s National Research Council (NRC), in the year 2000 the SoundStage! Network began measuring and publishing objective measurements of loudspeaker products — a first for online publications. The NRC’s legacy of producing accurate loudspeaker measurements goes back decades. Literally thousands of speakers have been measured […]

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Design and Application of Room Acoustic Diffusers

The research into acoustic diffusers at the University of Salford has been extensively summarised in a text book co-authored by Professor Trevor Cox: Acoustic Absorbers and Diffusers Diffusers are used in spaces where acoustics is a critical requirement. They can be used to improve speech intelligibility in railway stations, theatres and teleconferencing rooms and are […]

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Amperage alchemy

Paul McGowan writes ….. We’ve briefly discussed getting the digital audio stream into the DAC and then decoding those bits back into a form of analog that gets us a lot closer to being able to play it on our systems. At the output of the DAC chip we have a series of current steps […]

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Choosing wisely

Paul McGowan writes ….. In a recent post we decided on the type of output stage we wanted: balanced or unbalanced depending on the topology of the DAC before it or, in the case of a preamp, how extensive the designer wanted to go.  In our case we always spend the extra time and effort […]

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Having enough juice

Paul McGowan writes ….. One of the hotly debated issues amongst designers is current capabilities of an output stage on a DAC or preamplifier.  It’s number 8 on our list of the duties of an output stage.  On the one hand it can be argued that modern interconnects placed between the DAC and the preamplifier […]

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AMPHION LOUDSPEAKERS: Songs of Norway: From fishing fleets to studio beats – the Studio Nord story

They say: “When I did my first recording as an artist I knew I was going to be doing this a lot and for a very long time,” remembers Fred Endresen – a recording/mix engineer, and owner of Studio Nord in Mosjøen. Please click HERE for the full story  

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AMPHION LOUDSPEAKERS: Music: A language which Amphion’s studio monitors translate smoothly

They say: “Translation is definitely the key, and I do not know a system that has translation as good as Amphion’s. Actually when you are mixing on the Amphions all post-playing speakers become your Amphion,” says Matej Gobec, a producer and sound engineer from Ljubljana, Slovenia. Please click HERE for the full story  

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Gerald Wilson: Little Big Man

Originally posted September 2011 Robert Baird writes ….. Big bands died out back in the 1950s, right? They went away when the jitterbug faded and folks began dancing to music other than swing? And then real jazz fans departed when the bebop soloists came along and made big-band players look clumsy and quaint?Despite that widely […]

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ESSENTIAL READING: Design, DSPs and the debunking of traditional hi-fi

John Watkinson writes: Today’s loudspeakers are nowhere near as good as they could be, due in no small measure to the presence of “traditional” audiophile products. In the future, loudspeakers will increasingly communicate via digital wireless links and will contain digital processing. Indeed, the link between IT and loudspeakers is destined to grow.But no progress […]

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