Buzz Audio REQ-2.2 A

    tel:  项目经理：博乐

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the buzz req-2.2 a is the same as the standard req-2.2 version,but with an active low band, which yields a tighter bassresponse.
 
the buzz audio req is not a fully passive e as such - eachband has an amplifier associated with it and this approach ensurethere is no interaction between bands.  parallel resonantchokes and capacitors form the frequency selective part of eachband and these are coupled into the amplifier stage via theboost/cut control.  in order to keep the signal path as shortas possible, each band includes an in/out switch completelyremoving it from the chain if not required.

many other es using passive filters have limiteduency choices, but the re 72 different fre over four bands per channel.  the high and low bands canbe switched to bell or shelving mode and the two bell mid bandshave two centre frequency ranges.  each band has a bandwidth(q) control and if the high or low bands are switched shelf mode,this control reverts to a shelf "slope" control.  in additiona passive high pass filter and a variable "saturation" module areprovided.  the saturation module converts the req into a more"vintage" sounding unit by adding harmonics to the signal via theuse of a steel audio transformer driven by a "single ended" oldstyle class a amplifier (see distortion specs below).  theuency response is also altered by the saturation control,depending on the position of this switch.

the req is available in two versions, a recording (standard)version with +/-15db continuously variable boost/cut and aprecision mastering version with 23 position stepped +/-8dbboost/cut with 0.5 and 1db steps. all other controls on bothversions are switched for repeatability.  the high pass filterof the mastering version offers smaller steps and varying filterslopes to that on the recording version.

taking a look inside the re you will discover a veryhigh level of engineering and build with single point powersupply wiring, discrete power regulators for each band, reliableitt rotary switches and alps rotary boost/cut pots (or elma steppedattenuators in the mastering version) - the list goes on and on.click on the images above to see inside the resonance e anddiscover for yourself why this product is truly unique!

applications:
 •tracking and stereo mix bus e
•audio mastering and restoration
•post production sound shaping

features:
 • no other e like it in the world
 • fully discrete hi-bias wide bandwidth differential class aamplifiers
 • real choke and capacitor resonant circuits that soundfantastic
 • 72 frequency choices per channel
 • individual discrete power supply regulators for each eqband
 • large easy to adjust knobs
• high long life switches and potentiometers
 • modular internal construction for easy future servicing
 • mastering and recording versions
 • unique transformer saturation module
 • overall and individual band bypass switches
 • high-end balanced input and output amplifiers
 • input connectors with loop through
 • two output connectors on each channel
 • rugged chassis construction
 
specifications:

 frequency response
 measured with all eq bands on set flat, saturation and hpfoff 5hz to 125khz +0.2/-3db

harmonic distortion
 at +10dbu, saturation off 100hz 0.007%...1khz 0.004%...10khz0.007%...100khz 0.013%
 saturation on pos-1 20hz 1.5%...100hz 0.07%...1khz and up0.01%
 saturation on pos-2 20hz 1.5%...100hz 0.14%...1khz and up0.01%
 saturation on pos-3 20hz 1.5%...100hz 0.16%...1khz and up0.01%
 saturation on pos-4 20hz 1.6%...100hz 0.17%...1khz and up0.01%
 saturation on pos-5 20hz 1.7%...100hz 0.18%...1khz and up0.01%
 saturation on pos-6 20hz 2.0%...100hz 0.22%...1khz and up0.01%
 
maximum input level +25dbu

input impedance approx 20k ohms

maximum output level +32dbu balanced…+26dbu unbalanced

output impedance approx 70 ohms

input common mode rejection (ref 0dbu) 100hz -65db…1khz-65db…10khz -60db

noise all bands on set flat -110db below max input level aweighted