Specifications
t------
289 mm (11-318 IN.) 178 mm (7 IN.)
t
5.5
rnm
(7/32 IN.)
Noise: Outputs:
Phono: measured at Mix bus output, at least 71 dB
below 10
mV input, 20-20 kHz. Measured at M67
output, noise depends upon M67 master gain control.
With M67 master gain at
"5%"
(-
20 dB) noise output
of M67 will be -50
dBv maximum.
Line: will not add to noise of M67.
Distortion:
Program Channel: (measured at Mix Bus output)
Phono: Less than 1% THD with input level of 35
mV,
30 Hz-20 kHz.
Line: Less than 1% THD with input level of
+
18 dBm, 30 Hz-20 kHz.
Monitor Channel: measured at
&ohm speaker output
with
Bohm load. Less than 1.0% THD with output level
of .56 volts to
8
ohms (40 mW) 100 Hz- 15 kHz. Less
than 2% THD with level of .31 volts at 40 Hz.
Control Interaction:
Under
1% dB with any control combination.
Inputs:
Overload and Shorting Protection:
Shorting the outputs will produce no damage. Overload
of phono inputs up to 3 volts will produce no damage.
Operating Voltage:
27 Vdc nominal supply from either internal supply
comprised of six
9V type 216 batteries or from the
associated M67 or M63 Audio Master. Minimum supply
is 21.5 Vdc; maximum is 35.0 Vdc.
Input
Clipping
90
mV
Over +16
d BV
(6.3 VRMS)
Over
+
18
dBM
(6.3 VRMS)
Over
+
8
dBV
(2.5 VRMS)
Corresponds
to
+I8 dBM
output from
M67
Input
Phono
Line Bridging
Line Terminated
Monitor
Input
(via headphone
plug)
Weight:
Without batteries: 2.38 kg (5 Ib, 4 oz)
With batteries: 2.61 kg (5 Ib, 12 oz)
Output
Clipping
Level
-
+
17 dBV
(7 VRMS)
Same
as
M67
-2dBV
(0.8 V;
80
mW)
Output
Mix Bus
Front-Panel
Headphone Jack
Rear-Panel
Headphone Jack
8-ohm Speaker
Output
CONTROLS, CONNECTIONS
AND OPERATION
CONNECTIONS (TO M67, M63 OR
SE30)
Stacking hardware is included for mounting the M67
or M63 on top of the
M675. See installation instruc-
tions for the
A68S Stacking Kit provided in the data
sheet covering mixer and circuitry accessories. The
stacking kit is not used with the
SE30. The plug on
the "Headphones" output cable at the rear of the
M675 is inserted fully into the M67, M63 or SE30
Headphones jack. The phono-type plug on the "Mix
Bus" cable at the rear of the M675 is inserted into the
'NOTE: The input impedance is set for
25k
which is the correct load
Mix Bus jack on the M67 or SE30, or High Level lnput
for a stereo cartridge operating with the
L
&
R
channels
of the M63. The red and black "30 VDC" wires at the
parallel (monophonic mode). ~f an input impedance of 47k is
rear of the M675 should be connected to the 30 Vdc
desired, the 47k resistors
(R226, R227)
across the phono input
connecfors on the M67, M63 or SE30.
If
rack mounting
jacks may be removed.
is desired, the M67 and M675 can each be mounted in
A68R rack mount accessories. The connecting cables
Minimum Common Mode Rejection:
on the M675 are of sufficient length to reach the M67
80 dB with line input of 10 volts at 100 Hz.
in this case.
lmpedance
lmpedance
Designed
for
Use With
Magnetic
phono
cartridges
Less than
10 kilohms
600 ohms
M67 head-
phone
jack
Designed For
Use With
M67 Mix Bus
(3.5k load)
or higher
600 ohms or
greater
Low
High
(See
"Head-
phone"
section)
8 ohms or
greater
Actual
(Internal)
25
kilohms*
+350 pF
75 kilohms
t10%
600 ohms
?z
10%
1000 ohms
t
20%
Actual
(Internal)
13 kilohms
t
20%
70 ohms
&lo%
5 kilohms
k
20%
1.1 kilohms
-c
20%
4
ohms max.