Grace m501, Руководство пользователя

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m
501
page 4
featUres
Fast, musical transimpedance amplifier architecture •
Fully balanced, transformerless XLR microphone input •
High impedance 1/4 inch instrument DI input •
12 position precision gold contact rotary switch gain control •
0.5% precision metal film resistors in signal path •
High quality conductive plastic 10dB output trim control •
75Hz 12dB/octave high pass filter •
Two color LED peak meter shows signal present and peak •
Ribbon mic mode (also great for dynamic mics)- Optimizes signal path for ribbon mics •
Aluminum 1/2 width 1U chassis / two units fit together in a standard 1U rack tray •
Sealed gold contact relays for signal switching •
High precision active balanced output circuit •
No electrolytic capacitors in the signal path •
Ultra clean 48 Volt phantom power •
Minimal internal signal wiring •
Robust RFI and EMI protection •
5 year warranty on parts and labor •
Made in the USA •
PEAK INDICATOR
The LED peak indicator, which monitors the signal at the output of the pream-
plifier, illuminates green at -14dBu and red at +16dB (10dB before clipping).
GAIN CONTROL
The gain control has 12 positions and adjusts the voltage gain on the micro-
phone input from 10dB to 65dB in 5dB steps. When using the instrument
input, the gain range is –10dB to 45dB in 5dB steps.
48V PHANTOM POWER
This switch provides 48 Volts to power condenser microphones. LED indicator
illuminates red when active.
RIBBON SWITCH
Pushing this switch activates ribbon mic mode which optimizes the signal path
for non-active ribbon mics. LED indicator illuminates white when activated.
HIGH PASS FILTER
(labeled HPF) 75Hz, 12dB/Octave high pass filter.
TRIM CONTROL
The trim control provides zero to +10dB of continuously variable output trim.
1/4” TRS INSTRuMENT HI-Z INPuT
For high-impedance instrument or line level inputs.
10
dB
1
m
50
GAIN
TRIM
HI-Z
48V
ribbon
HPF
10
dB
10
dB
0
dB
0
dB
10
dB
65
dB
65
dB
front panel featUres