Mono Operation; Stereo Operation; Bridged Operation; Gain Controls - YORKVILLE CR5 Owner's Manual

Speaker
Configurations

Mono Operation

The CR5 can also be operated in mono by switching the mode switch to mono and connecting the input signal to either the A
or B input jack. This signal will be sent to both amplifiers. Each amplifier's audio level will be controlled by its corresponding
gain control. You can use the remaining input jacks to "loop through" to another amplifier or a piece of sound equipment.

Stereo Operation

The CR5 may be operated in stereo by switching the mode switch to stereo and connecting the "left / right" stereo input
signal to the A and B input jacks. Each gain control will adjust the audio level for its corresponding amplifier channel.
The input jacks for each channel are wired in parallel so that the unused connector can be used to send the input signal
to another amplifier or piece of sound equipment.

Bridged Operation

The CR5 may be operated in bridged mode by switching the mode switch to bridge and connecting the input signal to either
the A or B input jack. Channel A's gain control is used to adjust the audio signal level. The loudspeaker load is connected
across the two red binding posts with the positive lead of the loudspeaker wire connected to the red channel A binding post.
Outputs
Two types of output connectors are on the output of the CR5. Heavy duty binding posts accept a banana plug, forked
lug or bare wire connection. When the amplifier is used in stereo or mono mode, connect the loudspeaker to the red and
black binding post with the positive wire from the loudspeaker connecting to the red binding post and the negative wire
to the black binding post. For bridged mode operation the speaker load is connected across the two red binding posts
with the positive lead of the speaker wire connected to the red channel A binding post. The diagrams on the sidebar
show the different loudspeaker wiring configurations. The other connector is a ¼ inch phone jack for quick setups and
teardowns. Use a mono ¼ inch phone plug with the tip of the plug wired to the positive connector and the sleeve of the
phone plug wired to the negative connector of the loudspeaker.
The CR5 delivers up to 250 watts per channel into a 4-ohm loudspeaker. Wiring two 8 ohm speakers to one channel
will look like a 4 ohm loudspeaker to the amplifier and each 8-ohm loudspeaker will receive 125 watts. In bridge mode
the CR5 drives up to 500 watts into an 8-ohm loudspeaker. Don't put anything less than an 8-ohm loudspeaker load
across the speaker terminals in bridge mode or the amplifier may go into protection.

Gain Controls

The CR5's gain controls are located on the back of the amplifier. This prevents tampering with the gain controls when the
amplifier is rack mounted. The gain controls are calibrated in dB (decibels), corresponding to the audio voltage present at
the speaker output jacks. Where many amplifiers are used in an installation, the gain controls scaled in dB allow the user to
precisely set the audio output level of one CR5 amplifier channel relative to the other CR5 amplifier channels. This only
works if the amplifiers are receiving the same amplitude of input audio signal. The 0db or "full" position of the gain control
refers to 31.6 volts RMS (which equals 250 watts into 4-ohms) on the output of the
amplifier when a 1.4 volt RMS voltage is present at the input jacks. Placing the gain
control in the –3dB position with 1.4 volt RMS voltage present at the input jacks will
result in a 22.3 volt signal (which equals 125 watts into 4-ohms) at the speaker output.
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