Microphone Preamplifier.
UB282
Section A is a transformer balanced, low noise microphone preamplfier with front panel gain trim.
Section B is a transformer balanced line output amplifier with front panel level trim.
CONNECTIONS AND CONTROLS
MIC
UB282
Trim
Mic Out
Mic Out
Line In
Mic Gain
Section A
IN
Output
Level
Trim
Section B
Line In
+15v
0V
-15v
OUT
Phantom power
Output phase
Pin 2 Hot (+)
On
Off
Pin 3 Hot (+)
BLOCK DIAGRAM
SPECIFICATIONS
MICROPHONE SECTION
Section A - Mic preamplifier
+0/-1dB, 20Hz to 20kHz
-126dBu, 200R load
< 0.1% min gain
Frequency Response
EIN
THD
Mic Out
< 0.05% max gain
22dB to 62dB
1k balanced for 150/200R mics
100dB @ 100Hz
80dB @ 1kHz
Gain range
Input impedance
CMRR
Phantom
IN
Mic Gain
60dB @ 10kHz
-2dBu, min gain
-42dBu, max gain
1k unbalanced
Section B - Line output
Line In
Max input level
Output impedance
Phantom power
+15V
Output Level
Phase
OUT
OUTPUT SECTION
+0, -0.5dB, 20Hz to 20kHz
< 20R
47k
+20dBu
Off to +12dB
< -88dBu
Frequency response
Output impedance
Input impedance
Max output level
Gain range
Please note that each section is independant.
Output noise
+/-15V @ 20mA
POWER SUPPLY
In keeping with our policy of continuous improvement LA Audio reserves the right to alter specifications without prior notice.
Manufactured in the UK by LA Audio, 6-24 Southgate Road, London, N1 3JJ.
Tel: +44 (0)207 923 7447, FAX: +44 (0)207 241 3644. Web: www.laaudio.co.uk. email: [email protected]
A U D I O
An SCV International Group Company.
Rev 1.0 11/00.
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