For users, the Core99 has been vital for their performance. Further, significant, changes and updates have been made to enhance this performance - the new A2 is the better result.
The two input A2 preamp allows for an UST / AST combination: a new way for all of instrument's nuances to be reproduced, making the sound more alive. This system gives the player more freedom at high sound levels while retaining all the qualities of the former UST / sound-hole condenser mic system.
The B-Band UST / AST are accessed separately with the use of a standard 6.3 mm / 1/4" stereo cable. Both outputs are compatible with virtually all outboard equipment inputs.
The A2's UST channel has a unique contour filter for upper register tone enhancement. Inside there is a DIP switch for switching a high frequency (HF) enhancer on or off. When the switch is in the off position, frequency response is flat. When on, the HF enhancer gives a mild boost to the highs.
The A2's preamp second channel will, if preferred, accept a sound-hole condenser microphone or magnetic pickup as an alternative to the AST. There is DIP switches to turn on bias voltage for the mic, to turn on a highpass filter for microphone feedback reduction, and to lower the gain from 24 dB down to 0 dB.
The A2 kit provides a high quality endpin jack, all mounting hardware, 9-volt hold-tight battery clip and wire harness.
B-Band AG-MIC Condenser Microphone can be used instead of AST on A2 preamp's 2nd channel.
A2 Features:
- Two input and output channels: Channel 1 - UST or AST, Channel 2 - AST or sound-hole condenser microphone or magnetic pickup
- On/off-switchable treble enhancer at Ch 1
- On/off-switchable high-pass filter at Ch 2 (-6 dB/octave; 500 Hz)
- On/off-switchable mic bias (phantom) voltage at Ch 2
- High gain / low gain switch at Ch 2
- Average battery life 400 hours
A2 Specifications:
- S/N ratio: Greater than -90 dB
- Distortion: 0.05 %
- Frequency response: 50 Hz - 40 kHz (-3 dB) on both channels
- Low-cut slope: -6 dB/octave on both channels
- Ch 1 voltage gain: +18 dB
- Ch 2 voltage gain: 0 / +27 dB
- Ch 1 input impedance: 50 Mohm || < 10 pF
- Ch 2 input impedance: 20 Mohm (2.2 kohm with mic phantom on)
- Output impedance: 150 ohm on both channels
- Nominal output level: -10 dB u (0.245 Vrms) on both channels
- Mic bias voltage: 9 V through 2.2 kohm
- Preset treble enhancer boost: +3 dB @ 6.3 kHz; +5 dB @ 14 kHz (when on)
- Power supply: 9 V battery (not included)
- Current consumption: 1.5 mA typical (2 mA with mic)
- Connections: Transducer inputs, 2.54 mm / .10" header; Output, 6.3 mm / 1/4" jack
- Weight (with accessories): 50 g
- Dimensions (incl. jack): W 32 mm / 1.25", H 18 mm / .70" , L 82 mm / 3.20"
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