Electro-Voice A30 Instructions

EC s R O V 0 i C £. i N C
iCHACAN, MCHiGAl
quality lift* amplifier with provision for supplying the power necessary to
operate associated remote control and preamplifier equipment, Convenient
plug-in connections are provided for this purpose. The polished chrome and
black baked enamel hatch presents an attractive appearance and provides maxi¬
mum protection against corrosion.
MATUIII-No output tube DC in transformer. The Model A30 employs the
new Wiggins CIRCLOTRON circuit*. DC output current is removed from
through unity coupling of output tubes; class AB, operation
life. The primary impedance of the output transformer is one quarter of that
found in conventional amplifier output circuits, affording a vast increase in power
output at extremes of the frequency spectrum.
loudspeaker system eliminating the usual loss of bass from overdamping or
hangover due to tindetdamping. For the first time, through the use of this
control, optimum operation of any speaker system is assured.
130 Amplifier
Power Ovtpyf:
JFrsquency ieipsrsieT
SPECIFICATIONS
30 worn rated, 60 watts an peaks
See Fig.
2
"Maximum Undistorted Fewer
vs. Frequency''
±0.15 db 20 to 70,000 cpt at rated output
See Fig. 3 "Frequency Response"
Harmonic Distortion: less than
0
.
5
% o! rated output
Intermodulotion Distortion: less than l % at retted output
See Fig.
4
"Power vs. infermodylotton Distortion"
Hum and Noise:
90 db below rated output
Speaker Output:
4 ohms, i ohms, 16 ohms unbalonced;
600-ohm balanced
Undistortsd Power
quency
Feedback
Damping Factafr
leap feedback.; 1
6
db negative
Drive plat#;
2
db positive
Output circuit? 17 db negative
Total 31 db negative
Adjustable between 0,1 pad T
5
, See table
far
critical damping factors of all E-V speakers.
npuf Impedance: 250,000 ahim
Sensitivity:
1
,
25
V flMS
PcrffD Vmic jpaftnH pefu.fsrti?.