Quadraverb Q20
The new 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. Gone is the annoying external power supply, and in addition to the ADAT interface, there's also S/PDIF in and out on standard phonos. The input sockets are now combi XLRs that can accept balanced XLRs or regular quarter-inch balanced/unbalanced jacks, and the outputs are available on separate balanced XLRs or balanced jacks. There's also a 48kHz clock input, footswitch jacks for bypass and patch advance, and MIDI sockets for In and Out/Thru.

The effects are generated by the same proprietary 24-bit Alesis DSP chip as was used in the Q2 which, depending on the complexity of the effects chosen, can generate up to eight programmable effects blocks at once, though in most cases, only four or five typical effects can be combined before the DSP limit is reached. You can even use all the DSP power on one super reverb.
Also used on Hank Marvin CDs from 1999 to 2008 and Hank Marvin live shows during that period.

Reverbs

Plate, room, chamber, hall, reverse (all of which can be gated) Pitch effects: chorus, flange, detune, leslie, phaser Delays: Ping pong, mono, stereo, multitap EQ's: 3-band parametric, 5-band graphic, 11-band graphic Additional: LFO Panning, tremolo, ring modulation, tunable resonators, sampling

 

Selection of Quadraverb Q20 demos and players who use an Alesis Quadraverb Q20


QUADRAVERB Q20 - (more)

 



Frequency Response: ±0.2dB from 20Hz to 20kHz
Dynamic Range: >92 dB A-wtg., 20 Hz-22 kHz
Distortion (THD+N): <0.005% @1kHz
Crosstalk: >88 dB below full scale
Sampling Rate: 48kHz (variable from 40.4 kHz to 50.8 kHz under external control)
Analog Inputs: Stereo (L/R) Combination XLR/1/4" TRS jacks, balanced/unbalanced Analog Outputs: Stereo (L/R) XLR, Stereo 1/4" jacks, balanced/unbalanced
Digital Conversion: 20-bit 256 times oversampling A/D, 20-bit,
256 times oversampling D/A
Digital Input/Output: ADAT MultiChannel Optical Digital Interface,
S/PDIF Digital Interface, BNC jack for 48kHz word clock connection
Factory Preset Programs (ROM): 100
User Programs (RAM): 200
Dimensions (WxHxD): 19" x 1.75" x 7" (483mm x 45mm x 178mm)
Weight: 4.25 lbs. (1.9kg)

 

  QV Q20 . Description