模拟输入:> 80 dB (15 kHz / +60 dB) ,最大输入电平:> +21 dBu ( > 33 dBu with pad) ,增益:0---+66 dB (6 dB steps),增益准确度:+/- 0,25 dB ,低切:12 Hz---250 Hz (-3 dB) ,总谐波失真加噪声:< 0,001 % ,噪声比:-129 dB (60 dB gain) ,频率响应:10 Hz---30 kHz (-0,5 dB) ,内噪声带宽:200 kHz (+60 dB gain) ,最大输出电平:> +25 dBu (in 600 ohms )
2-ch MICROPHONE PREAMP F355
The LAKE PEOPLE MIC-AMP F355 is an extremely low-noise and fully featured microphone preamplifier with excellent specifications. Due to its versatile concept and high level capability it is also suitable for line signal boosting and balancing.
The gain element of the standard version is a high quality instrumentation amplifier. As an option, MIC-AMP F355 may be equipped with a sophisticated Class-A frontend, built with discret components.
Gain is controlled with two knobs per channel: a twelve-step rotary switch sets coarse gain in 6-dB steps from 0 to +66 dB. A centerdetented potentiometer allows fine adjustment within a range of +/- 5 dB. The lo-cut filter may be set individually from 10 to 250 Hz.
Each channel is equipped with buttons for
- Phantom powering
- Phase reverse
- (de-) activation of Gain-Fine adjust
- (de-) activation of Lo-Cut control
The state of all these buttons is reported by LEDs.
In order to keep the signal path as pure as possible, the electronic components of the Gain-Fine control and the Lo-Cut filter stage may be removed completely with the aid of relais.
Whilst switching on or off the phantom power, the outputs may be muted during 4 seconds.
A sixteen-segment LED bargraph with semilogarithmical law displays the output level over a range of 36 dB. Display sensitivity can be adjusted to the users requirements with a trim located on the front panel.
A clip LED starts flashing at levels above +20 dBu and thus reliably warns against distortion. The electronically balanced inputs and outputs are situated on the rear panel. Each channel is equipped with two outputs.
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Electronically balanced input via XLR
Gain 0 ... +66 dB switchable in 12 steps of 6 dB
Fine-adjustment by center detent pot +/- 5 dB may be deactivated
Lo-cut, 12 dB/oct., with variable frequency range 12...250 Hz may be deactivated
Noise -129 dB at 60 dB gain
Pad-switch for -12 dB level reduction
Programmable intelligent muting system
Switchable 48 V phantom powering
Switchable phase reverse
16-step ultra fast level meter, 0 … -36 dBr may be calibrated individually on the front panel
Additional separate Clip Led
2 x electronically balanced outputs via XLR
Option: transformer balanced outputs
Option: Ultra High Quality Class-A Frontend
Option: GP-I/O e.g. for mute / rec light control
Här kan du ladda hem en F355-manual (PDF 820 kB) på tyska och engelska.
TECHNICAL DATA MIC-AMP F355
2, electr. balanced, 5 kohms
Input CMRR: > 80 dB (@ 15 kHz / +60 dB)
Max. input level: > +21 dBu ( > 33 dBu with pad)
Gain coarse:: 0 ... +66 dB (6 dB steps)
Gain fine: +/- 5 dB variable
Gain accuracy: +/- 0,25 dB
Lo-Cut: 12 Hz ... 250 Hz (-3 dB)
THD+N: < 0,001 %
Noise: -129 dB (@ 60 dB gain)
Frequency range: 10 Hz … 30 kHz (-0,5 dB)
Internal bandwidth: 200 kHz (@ +60 dB gain)
Max. output level: > +25 dBu (in 600 ohms )
Output CMRR: > 60 dB (@ 15 kHz)
Output impedance: < 30 ohms
Meter range: 0 … -36 dBr, adjustable
Power supply: 115 / 230 VAC, 15 VA
Dimensions: 483x44x166 mm (WxHxD), 19", 1U
Case: Stainless steel
Front: Front dark grey
Options: Transformer balanced outputs
Ultra High Quality Class-A Frontend
GP-I/O e.g. for mute / rec light control