Dual 704 - Specifications; Overall Speed Variation; Rumble and Noise Levels; Tonearm Specifications

Specification
Current Type
AC 50
— 60 Hz, without motor
changeover
Line voltages
110 —
125 Volt, 220 —
240 Volt
Drive
Electronical ly-controlled direct
drive system
Dual
EDS 900
Power
Consumption
approx. 3.5 Watt
Motor during
play < 50 mW
Current Consumption
with 220 V 50 Hz:
on
start-up 45 mA
with 110 V 60 Hz:
on start-up 80
mA
during play
20
mA
during play
app. 40 mA
Run -up Time
(until
nominal speed is
reached)
2 - 2.5 sec. on 33 1/3 rpm
Platter
Non-magnetic,
dynamical ly-balanced,
detachable,
1.2 kg 300 mm 0
Total rotating
mass of drive system
(rotor
with
platter)
1.8 kg.
Platter Speeds
33
1/3 and 45 rpm,
electronically switchable.
Pitch Control
For both speeds,
adjustable in each case with
variable resistor,
range of adjustment 10 %
Speed
Check
with light stroboscope for platter speed 33 1/3 rpm.
Strobe
markings for 50 and 60 Hz provided on the platter
edge.
Sensitivity of Light Stroboscope for 0.1 %
Speed Deviation
3 graduations per minute at 50 Hz
3.6
graduations per
minute at
60
Hz
Overall Speed Variation
(assessed in accordance with DIN 45
507)
< ± 0.05%
Signal-to-Noise
Ratio (in
accordance
with DIN
45500)
Rumble unweighted
signal-to-noise ratio
> 46 dB
Rumble
weighted signal-to-noise ratio
> 67 dB
Tonearm
Torsion
resistant, extra long
tubular aluminum
tonearm in
super flat
universal four-point
gimbal suspension,
tonearm
balance weight
with double acting
vibration damping (2
anti-resonators).
Effective Tonearm Lenght
222
mm
Offset Angle
26 0 4'
Tangential Track Error Angle
0.16 0
/cm
Tonearm Bearing Friction
(related to stylus
point)
Vertical
<
0.07 mN (0.007 g)
Horizontal
< 0.15 mN
(0.015g)
Tracking Force
0
—30 mN (0 — 3 grams) infinitely variable
with 1 mN
(0.1 g) cal
ibrations from 0 to 15 mN (0
to 1.5 g),
operable
from 2.5 mN (0.25 g) stylus pressure up.
0 — 3 g
continuously variable, with 1/10
calibration in the
range from 0 — 1.5 g,
rel iable as from 0.25 g tracking force
Pick -up Head
Detachable,
suitable for all pick -up
cartridges with 1/2"
mounting
and a deadweight of
4,5 — 10 g (including
mounting
material)
Adjustable Overhang 5 mm
Pick -up
Cartridge
See
separate data sheet
Weight
5.4 kg
Dimensions and
Cutout Required
refer to Installation
Instructions.
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