Shure va 300 owners manual

Page 1

a-®
VA 300
@fla/(j/fi/m
OPERATING AND SERVICE MANUAL

Manufactured by
SHURE BROTHERS INC.
222 Hartrey Avenue
Evanston, Illinois 60204 U. S. A.

Copyright 1978, Shure Brothers Inc. P' . A
AL404 (RE) 27A819 rInted In U. S. .

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VA300 SPECIFICATIONS

VA300-C Console

Amplifier Type ............................ All silicon transistor mixer/power amplifier
Power Output ........... 100 watts continuous (HMS); (to 8 ohm load, see Figure 3, Page 7)
Voltage Gain ........................... 60 db Mic." Input Level (8 ohm load)

49 db Inst." Input Level (8 ohm load)
Frequency Response .......................... i 2 db 40 Hz. to 20,000 Hz. (typical)

Input Impedance ..................................... 60,000 ohms Mic." Input Level
120,000 ohms Inst." Input Level

Distortion ................................ 5% maximum at rated output at 1 KHZ.
Hum and Noise ........................................ 60 db below rated output
Speaker Load Impedance ................ Nominal 8 ohms; operational 5.3 ohms minimum

(See Figure 3, Page 7)

Input Clipping Level ....................... Greater than 300 Mv. (Mic. Input Level)
Greater than 1 V. (lnst." Input Level)

Bass Control Action ..................... t 13 db at 100 Hz. with respect to Ilat setting
Treble Control Action .................. 1 10 db at 10,000 Hz. with respect to llat setting
To Tape Recorder" Jack ..... Impedance 5,000 ohms; Output 19 db below speaker output;

nominal - 2 V at 50 watts to speakers, Clipping Level 4 V.

Echo-To Input" Jack (Output To External Echo Unit) ............ Impedance 10,000 ohms;
Output 20 db above microphone inputs with individual volumes at 10"; Clipping level 3 V.

Echo-To Output" Jack (Input From External Echo Unit) .......... Impedance 40,000 ohms;
Sensitivity 200 Mv. for rated amplilier output with Echo Gain" Control and

Master Volume" Control at maximum settings; Clipping level 2 V. with maximum

setting of Echo Gain" control. Clipping level increases with reduced setting

of Echo Gain" control.

Reverb Switch Jack ................ D.C. switching (no audio), parallels the Master Reverb
In-Out Switch. Any cable with a resistance of less then 5,000 ohms may be used.

Center Notch Frequencies of Anti-Feedback" Filters .............. 5,000 Hz.
2,200 Hz.

1,000 HZ.

155 Hz.