Red Rose Music 5 - Manual (Page 9)

15. Feedback Control (Left) The Feedback Control switch is a rotary switch that sets the optimal
feedback level for speakers with different impedances. Use a small screwdriver or alignment tool to
move the red mark next to the impedance of the speaker connected to the right channel of the ampli-
fier. If you don’t know the impedance of your speakers, consult the documentation supplied with the
speaker, ask your dealer or the speaker manufacturer, or use an ohm meter to measure the imped-
ance. Turn the amplifier off before you adjust the Feedback Control setting.
16. Tape Out (Left) The Tape Out connector is an unbuffered output that carries the currently
selected Left Channel program source at a constant level. The Volume Control setting has no effect
on the Tape Out signal.
17. Left Channel Inputs The five Left Channel input connectors accept line-level audio signals
from external program sources such as compact disc players and tuners. The amplifier plays the
program from each connector through the Left Speaker output when the Program Selector switch is
set to the position that corresponds to that connector. All five connectors are identical line-stage
inputs. The amplifier does not include a phono preamp stage; in order to play LPs or other low-level
program sources, you must use an external preamplifier.
18. AC Power Connector The AC Power Connector is a standard IEC three-wire AC socket. The
AudioPrism HC power cable supplied with your amplifier meets our minimum performance speci-
fication, but you may improve the amplifier’s performance by replacing it with our SuperNatural™
power cord.
19. Fuse Holder The fuse holder contains two fuses. The fuse farthest from the outside of the fuse
holder protects the amplifier from AC power surges. The second fuse is a spare. To open the fuse
holder, disconnect the power cable from the amplifier, and insert the blade of a small flat-blade
screwdriver into the hole at the top of the fuse holder and turn the screwdriver. To remove the active
fuse, twist the fuse 90º out of the holder.
Top of Amplifier (refer to next page for illustration)
20 - 23. Line Stage Tube Sockets The four 12AT7 vacuum tubes supplied with the Model 5 ampli-
fier fit the Line Stage Tube Sockets. Each of the tubes supplied includes a mark that identifies the
specific socket that held that tube when the amplifier was aligned at the factory.
24. BIAS MONITOR Switch The BIAS MONITOR switch selects the current use of the Bias
Meter. The V1, V2, V3 and V4 settings assign the meter to display the bias (plate current) of one of
the four EL-34/ 6CA7 output tubes. Set the switch to the OPERATE position for normal operation of
the amplifier.
25. V1 Bias Adjust The V1 Bias Adjust control sets the plate current of output tube V1. Use an
alignment tool or a small screwdriver to raise or lower the plate current.
26. V2 Bias Adjust The V2 Bias Adjust control sets the plate current of output tube V2.
NOTE: Under no circumstances should you replace the power fuse with one of a higher
rating! Doing so may cause further damage to the Model 5 and will also void the war-
ranty. In addition, your continued protection from fire or shock would be seriously com-
promised.