HISTORY The Alesis Quadraverb ruled the rack-processor market of the late 80s and early 90s and can still be found in countless guitar rigs, studios and live sound setups to this day. The “Quads” longevity is a testament to its outstanding sound quality and highly editable effects. Starting with the upgrade of the Quad, the Quadraverb Plus, Multi Tap Delay has been introduced among other features, which made it possible for Charlie Hall to develop settiings to simulate old tape echo units form the early sixties, used by The Shadows and many other groups in those days.(Meazi, Binson, .....) ( Echos From The Past EFTP)
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	This website has no relation with Alesis Company I am a fan and collector of the Alesis Quadraverb series. Hennie Jansen

ALESIS

		QUADRAVERB The Alesis QuadraVerb is a 16Hz-20kHz bandwidth stereo programmable effects box with four digital effects (EQ, Pitch Change, Delay, Reverb). The effects can be used in parallel or in serial (or a combination).more
		Selftest: To perform the QuadraVerb's self diagnostics connect a MIDI cable between MIDI in, and MIDI out. Power up the unit while holding the "BYPASS", and "CONFIG", buttons down. The unit will then test ROM , RAM , Button LEDs, MIDI , and the clip LED . In the event of ROM , RAM , or MIDI failure, the unit will stop, and the display will show "ERROR IN {COMPONENT}".

		QUADRAVERB PLUS The QuadraVerb Plus is an upgraded version of the original QuadraVerb . The many new features that are now available are made possible by a simple software update (eprom) more
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		QUADRAVERB GT The Alesis QuadraVerb GT is a stereo effects unit that is ideal for guitar. It combines analog preamp and digital electronics to provide the best of both worlds.more
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		QUADRAVERB 2 The Alesis Q2 Multi-effects Processor has endless possibilities for tweaking to those who'll give out their time and effort to achieve amazing heights in sound effects. It's high-performance equipment, with easy-to-use operating system and a wide, informative LCD display. more
		Selftest: hold "PROGRAM" and "BLOCK " while powering the unit up

		QUADRAVERB 20 The Q20 is essentially a Q2 fitted with 20-bit converters, but it's also been improved in other areas, not least in having twice as many user memories. more
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Hank Marvin Echo Machines Comparison (EFTP, Hall and Collins, Halls Echos and Vox Short Tom)

	Hank Marvin Explanation of his echo-delay sound. Hank Marvin explains his echo delay sound used in the early sixties. He also advised in the development of Quadraverb EFTP patches by Charlie Hall. Hank used 2 Quadraverbs with those patches from 1996 - 2008 and during his Final Tour.   Echo units used by The Shadows Determining which echo unit was used by the Shadows at any stage throughout their 50 years together is quite a challenge. The list below has been ascertained from a number of sources, including photographs, films/videos, books, comments in magazines, comments of the various web sites devoted to Shadows matters, personal correspondence and, most importantly, analysis of the echo patterns and voicing that characterises each of the units just as surely as fingerprints identify a human being.
	Echo units used by The Shadows The Shadows Echoes_From Then To Now