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45 CONNAIR ROAD ORANGE, CT 06477-3650 USA 50/60 Hz MADE IN USA 30mA max. OUT IN 12VDC NO USER SERVICEABLE PARTS INSIDE Balanced Inputs Remote Connections 4 Inputs 1-7 7 12 VDC Remote Power Out Single-Ended Inputs 8 12 VDC Remote Power In 5 Inputs 1-7 Power Amplifier Channel 9 IEC Connector and Outputs Fuseholder 6 Outputs 1-7 Back Panel Description See Figure 2 on page 7 BALANCED INPUTS SINGLE-ENDED INPUTS IMPORTANT AMPLIFIER CHANNEL OUTPUTS IMPORTANT BACK PANEL REMOTE CONNECTIONS Notes The Showcase Amplifier back panel provides connections for all inputs and outputs, remote connection input and output links, and the AC power supply. 4 Inputs 1-7 The Showcase Amplifier has seven channel inputs for output devices with balanced XLR connectors. 5 Inputs 1-7 The Showcase Amplifier has seven channel inputs for output devices with single-ended RCA connectors. Use only one input to each amplifier channel at a time. You may use the balanced inputs for some of the amplifier channels and the single-ended inputs for the remaining channels. 6 Outputs 1-7 The Showcase Amplifier has seven amplifier channel outputs. The loudspeaker binding post terminals accept spade lugs, bare wire, or pins. Use the red terminal for the positive connection and the black terminal for the negative connection. Tighten loudspeaker binding posts by hand only. 7 12 VDC Remote Power Out The Showcase Amplifier is equipped with an output that sends 12 VDC power on/off (12 V trigger) signals to other Krell components and other devices that incorporate a 12 V trigger. When the component is in the operational mode, the 12 VDC Out provides 12 V of DC output. When the component is in the stand-by mode or off, the DC output is 0 V. 12 VDC Out (12 V trigger) current is limited to 30 mA. Krell Showcase Amplifier Back Panel Description, continued Back Panel Description, continued Note POWER 8 12 VDC Remote Power In The Showcase Amplifier is equipped with an input that receives 12 VDC power on/off (12 V trigger) signals from other Krell components and other devices that incorporate a 12 V trigger. This allows you to turn the Showcase Amplifier on and off using a Krell or other component in a custom installation. Consult the owner’s manual of each component used in a custom installation to take full advantage of the Showcase Amplifier remote capability. 9 IEC Connector and Fuseholder The connector is for use with the provided IEC standard 15 amp power cord. The AC mains fuse protects the Showcase Amplifier in the event of an internal fault. Note The AC mains fuse must be replaced with the spare fuse provided. Use the 10 A slow-blow fuse for 100–120 VAC or the 5 A slow-blow fuse for 220–240 VAC. Krell Showcase Amplifier Connecting the Showcase Amplifier to Your System INPUT AND OUTPUT CONNECTIONS The Showcase Amplifier is equipped with balanced and single-ended inputs. Krell recommends using balanced interconnect cables. Balanced interconnect cables not only can minimize sonic loss but are also immune to induced noise, especially with installations using long cables. Balanced connections have 6 dB more gain than single- ended connections. When level matching is critical, please keep this gain value in mind. The Showcase Amplifier is shipped with shorting pins in the XLR inputs. These pins should remain in the XLR inputs if the amplifier is operating in the single-ended mode. When the shorting pin is inserted, pins 1 (lower left) and 3 (top) are shorted together. Remove the shorting pins to connect the amplifier for balanced operation. The XLR pin configuration is described below: Pin 1 Shield (ground) Pin 2 Non-inverting (hot) (0°) Pin 3 Inverting (cold) (180°) Follow these steps to connect the Showcase Amplifier to your system. 1. Make sure all power sources and components are off before connecting inputs and outputs. 2. Neatly organize the wiring between the amplifier and all system components. Separate AC wires from audio cables to prevent hum or other unwanted noise from being introduced into the system. 3. Connect the interconnect cables from your output device to the amplifier inputs using the balanced (4) or single-ended (5) inputs located on the back panel. The balanced inputs use three-pin XLR connectors; the single-ended inputs use RCA connectors. The Showcase 5 uses only inputs 1 through 5 and the Showcase 6 uses inputs 1 through 6. IMPORTANT Use only one input to each amplifier channel at a time. You may use the balanced inputs for some of the amplifier channels and the single- ended inputs for the remaining channels. Krell Showcase Amplifier Connecting the Showcase Amplifier, continued Connecting the Showcase Amplifier, continued IMPORTANT Note 4. Connect the loudspeaker cab...

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