JEFF ROWLAND Cadence Phono Stage User Manual

Front Panel Function Controls
B
efore attempting any system interconnection, please familiarize yourself
with the front panel controls of the Cadence Phono Stage. The descrip-
tions below refer to the numbers & letters associated with the features in
the diagram above.
To properly match your phono cartridge to the Cadence, the DC coil resis-
tance of the phono cartridge must be known. This value may be obtained
from the cartridge technical specifications. The recommended cartridge
load resistance, i.e. 100 ohms, 47K ohms, does not refer to this value. The
value required will be listed, if specified, as DC coil resistance, a value
within the range of 2 to 80 ohms. If this value cannot be obtained, then the
resistance can be measured directly. Simply unplug the phono interconnect
cable (connected to the turntable). With a handheld ohmmeter (multimeter),
measure the resistance between the signal contacts (tip and ground on RCA
terminated interconnects, Pin #2 and Pin #3 on XLR terminated intercon-
nects) or measure directly on the phono cartridge terminals themselves. If
this value cannot be ascertained, then select the LO-GAIN AMP, HI-LOAD
position with the OPTION SELECT push button. Although this position may
not be optimum for your particular cartridge, it will not create any
frequency response errors with any moving coil cartridge.
Front Panel
A OPTION SELECT push button: Momentarily pressing this button changes
the Phono Stage Gain or Load.
The Cadence will automatically select the LO-GAIN AMP/HI-LOAD
position when power is initially applied (default position), LAMP
1 will
be illuminated. This setting will be used for the majority of moving coil
cartridges available in the market. Use this position for cartridges whose
output ranges from 0.3 mV to 0.8 mV and DC coil resistance ranging
from 30 ohms to 80 ohms. The Cadence will load the cartridge at 400
ohms and provide an overall gain of 64 dB.
Pressing the OPTION SELECT button (A) will select the HI-GAIN
AMP/LO-LOAD position (Lamp
2 will be illuminated.) Use this position
only with cartridges having a known DC coil resistance of 2 to 3 ohms.
These cartridges will usually have a very low output (less than 0.2 mV).
The Cadence will load the cartridge at 30 ohms and provide an overall
gain of 74 dB without an increase in noise, despite the increase in gain.
Note: Use of cartridges other than those specified above in this position
will result in a significant decrease in high-frequency response.
Pressing the OPTION SELECT button
A a second time will select the
HI-GAIN AMP/HI-LOAD position (Lamp
3 will be illuminated.) Use this
position only with cartridges having a known DC coil resistance of 4 to
6 ohms. These cartridges will usually have a very low output (less than
0.2 mV). The Cadence will load the cartridge at 50 ohms and provide an
overall gain of 74 dB without an increase in noise, despite the increase
in gain. Note: Use of cartridges other than those specified above in this
position will result in a significant decrease in high-frequency response.
Pressing the OPTION SELECT button
A a third time will select the LO-
GAIN AMP/LO-LOAD position(Lamp
4 will be illuminated.). Use this
position only with cartridges having a known DC coil resistance of 7 to
30 ohms. The Cadence will load the cartridge at 250 ohms and provide
an overall gain of 64 dB.
Note: Various manufacturers of moving coil phono cartridges recommend
a load resistance of 47K ohms, thereby allowing the particular cartridge to
have a perceived compatibility with a wide range of phono preamplifiers,
many of which do not have a convenient means of selecting a lower,
more optimal value of load resistance. For ideal frequency response and
optimal performance, all moving coil cartridges must be properly loaded,
preferably with a value which is approximately ten times the source
resistance (DC coil resistance).
WARNING: It is unlikely that the OPTION SELECT push
button would be pressed once the correct GAIN/LOAD setting
has been chosen. However, changing a GAIN/LOAD setting during listening
may result in a large increase in volume (up to 10 dB) with the potential of
damaging equipment elsewhere in the system.
Front Panel Function Controls
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JEFF ROWLAND Cadence Phono Stage Specifications

General

Brand	JEFF ROWLAND
Model	Cadence Phono Stage
Category	Amplifier
Language	English