LA Audio Electronic Stereo Amplifier UB282 User Manual

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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