D250LS 2-Channel Power Amplifier with Local Source Switching Installation Manual
SAFETY INSTRUCTIONS 6. Cleaning - The appliance should be cleaned only as WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE THE COVER. NO USERSERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
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PRODUCT OVERVIEW Introduction The Russound D250LS is a 2-channel power amplifier with automatic local source switching capability. The D250LS allows a local source (e.g., PC or TV in the bedroom) to automatically override the speakers in that particular zone of a distributed audio system. This can be accomplished with a variety of input/ trigger options for versatility in many different applications. The D250LS is rated at 50 watts per channel into 8 ohms and 75 watts per channel into 4 ohms.
FRONT AND REAR PANEL D250LS Front Panel Power Switch / LED Line Input Video Input 12VDC Trigger in/out Gain Controls Delay Time Default Input Stereo/Bridge Switch Speaker Outputs Amplified In Fuse Receptacle AC Input D250LS Rear Panel Rev.
FRONT AND BACK PANEL FEATURES Power LED Default Input On start-up, the first LED lights red to show power on. When the amplifier goes into standby, the LED will light amber. Default Input is a pass-through input for the whole-house system. If no signal is input to the "Line In" or the "Amplified In," the Default input will be connected directly to the A and B speaker output. Power Switch Amplified In Turns the amplifier on/off.
INSTALLATION OPTIONS The D250LS amplifier can be set on a tabletop or wall-mounted with screws or hook and loop tape. Rack-mounting ears are included to install either one D250LS in a 1U space or two units in a 1U space. Wall Mounting The amplifier comes with two wall mounting brackets and attachment screws. There are two attachment locations on each side of the amplifier for more mounting options. Hook and loop tape can be used as well.
LOCAL SOURCE SYSTEM CONFIGURATION The D250LS can be used as a single-source two-channel zone amplifier, or as a local-source amplifier that automatically switches between a default source (e.g., a whole-house audio distribution system) and a local source (e.g., a television set in the bedroom or a PC in the office).
BRIDGED OPERATION When the amplifier is in bridged mode operation, both the left and right channels are combined for a higher powered mono output. For bridged amplifier operation, turn off the power to the amplifier and connect an 8-ohm minimum load to the Speaker B output. Following the Bridge Mode markings in red on the back of the amplifier: Connect the negative lead (-) of the speaker cable to the R+ terminal. Connect the positive lead (+) of the speaker cable to the L+ terminal.
DUAL UNIT SETUP The D250LS can be used in a side-by-side configuration using the optional rack mounting kit. This feature makes it easy to add amplification to two controllers or two zones (e.g., on the MCA-C5 controller). The example shown features two D250LS amps connected to an MCA-C5, zones 7 and 8. One amp adds power through bridged mode for an outdoor zone. The other amp powers a pair of speakers in a zone for normal operation.
TECHNICAL SPECIFICATIONS / WARRANTY D250LS Amplifier Warranty Continuous Output Power: (<0.3% THD+N) @ 1kHz Distortion THD+N: Signal-to-Noise Ratio: Channel Separation: Frequency Response: Input Sensitivity: Input Impedance: Voltage Gain: Delay Time: Input Trigger: Output Trigger: Power Requirements: (Autoswitching Power Supply) Fuse Rating: Standby Power: Dimensions: Weight: 50W per channel at 8 ohms 75W per channel at 4 ohms 150W at 8 ohms, 2 channels bridged <0.
D250LS 2-Channel Power Amplifier with Local Source Switching Installation Manual ©2010 Russound. All rights reserved. All trademarks are the property of their respective owners. Specifications are subject to change without notice. Russound is not responsible for typographical errors or omissions. Russound, Inc. 5 Forbes Road, Newmarket, NH 03857 tel 603.659.5170 • fax 603.659.5388 email: tech@russound.com www.russound.com 28-1357 Rev.
