APPENDIX II
INSTRUCTIONS FOR USING D-10 AMPLIFIERS WITH 100V/70V LINE TRANSFORMERS
Frequency response
It is necessary to provide some low frequency roll off to prevent the possibility of the line
transformer saturating.
On the D-10 the roll off is included on the main board as standard. To bring the 63 Hz roll off
into circuit, remove the 4 jumper links at 'hpf'.
The response must be at least -3dB at 70 Hz and roll off at minimum 12dB per octave.
LINE TRANSFORMER LEAD OUTS
500W single 100V winding:
Primary:
Orange = +ve, Black = -ve (4 ohms)
Secondary:
Yellow = +ve, Grey = -ve (100V)
Blue = centre tap, for monitoring purposes only
Note:
D-100 will give you 100V line out at the terminals.
D-20 will give you 70V line out at the terminals.
E11EVEN SOUND \
D series amplifiers
\
User’s Manual
1
3
