In 1988, Alesis Corp. introduced the original QuadraVerb, a music effects processor capable of four simultaneous effects in multiple configurations. Since then have been introduced: Alesis Q20 Alesis Q2 QuadraVerb GT QuadraVerb Plus .
	Over the years I collected quite some Quadraverb units. The first unitin 2011 from dutch The Explosions Rockets
	Quadraverb plus EFTP demo Jim plays F.B.I All videos of this player

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)

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)

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)

Alesis Q2 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)

Alesis Q20 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)

Click on more for more info Manuals are available via the Menu button DOWNLOADS http://charliehall.proboards.com/index.cgi QV HOLD BYPASS AND PROGRAM THEN POWER ON. QV GT HOLD BYPASS AND PROGRAM WHILE TURNING ON THE POWER. QV 2 SOFT RESET: HOLD PROGRAM AND COMPARE AND POWER ON. ( SETS GLOBAL TO DEFAULT, CLEARS EDIT BUFFER, LEAVES USER MEMORY INTACT). QV 2 HARD RESET: HOLD "PROGRAM", "COMPARE" AND "-BLOCK" AND POWER ON. (SETS ALL FUNCTIONS TO DEFAULT AND CLEARS USER MEMORY).     Q-20 SOFT RESET: HOLD PROGRAM AND COMPARE AND POWER ON. (SETS GLOBAL TO DEFAULT, CLEARS EDIT BUFFER, LEAVES USER MEMORY INTACT). Q-20 HARD RESET: HOLD "PROGRAM", "COMPARE" AND "-BLOCK" AND POWER ON. (SETS ALL FUNCTIONS TO DEFAULT AND CLEARS USER MEMORY).