Buzz Audio MA 2.2.

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Buzz Audio MA 2.2

The MA-2.2 provides ultra clean (but not clinical sounding) amplification of all microphone signals. It is considered by many to be an excellent choice for recording acoustic guitar and has been designed with this application in mind. The MA-2.2 is extremely musical in character and will deliver transperant reproduction of any acoustic source including voice, drums, percussion, piano and strings.

The MA-2.2 has been designed by active recording engineers to provide the cleanest possible interface between microphones and recording channels. By utilizing our own proprietary Class A amplifier modules (the BE-40), attention to power supply design and a resistor loaded C-Coupled input topology, the MA-2.2 exhibits sonic qualities unique in it's class.

The MA-2.2's ultra low noise and noise spectra provides the best possible dynamic range for digital recordings. With a slew rate of 140V/uS, we believe the MA-2.2 to be an excellent choice for recording all types of acoustic music where distortionless reproduction of transients is critical. Users can expect a clean, uncluttered midrange coupled with superb treble clarity and extended bass response. The MA-2.2 sounds great with all microphone types, and reveals the true acoustic source.

The MA-2.2 is a development of the original MA-2 first produced in 1993, with the circuit remaining essentially unchanged. Nothing is overlooked in the design of this piece. Take a look at the channel card and also take a look at the matching MIA1.0 Direct Box adaptor.

Features


Fully discrete hi-bias wide bandwidth differential Class A amplifiers.

Matched and selected semiconductors.

Transformerless input and output with hi-grade film coupling capacitors.

2 stages of power supply regulation.

Individual discrete regulators for each stage of the 2 stage amplifier.

High quality bifurcated relays for signal switching.

Single Point Ground pcb layout.

41 position max trimmed GAIN control.

Trimmed common mode noise rejection.

Optimized "grunty" Class A amplifiers for the input/output functions.

Output Mute and Hi/Lo input impedance switches.

Sowter output transformer option.

2 output connectors

Shielded toroidal power transformer

Specs:


Min Gain = +16dB (-4dB with pad in)

Max Gain = +65dB

Maximum Output Level = +24dBu unbalanced.

Frequency Response = 2Hz to 250kHz @ 20dB gain (-3dB).
= 20Hz to 250kHz @ 65dB gain (-3dB).

Harmonic Distortion = less than 0.008%100Hz to 10kHz.

Slew Rate = typically 140 V/uS, @ +20dBu output level.

EIN = -133.5dB A wtg, 150ohm source Z.

Signal to Noise Ratio = -74dB A wtg, input shorted.

CMNR = 100Hz-80dB, 1kHz -80dB, 10kHz-70dB internal trims.

Channel to Channel Crosstalk = below noise.

Input Impedance = 3k ohms/1k2 ohms switchable.

Controls = Gain, Mute, Input Impedance, 20dB input Pad, Phase Reverse, Phantom pwr.

Indicators = Peak Level @ +18dBu, Power On.

Connectors = In-XLR3F, Out on 1/4" jack and XLR3M.

Size = 1 Unit rack mount, (482Wx44Hx300D).

Power requirements = 230V/115V selectable.

Options = Sowter balanced output transformer.

Specifications are typical of a production unit and are subject to change without notice.

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  Absorption


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