Two Channel Contractor Series Power Amplifiers SLA150 SLA250 SLA470 MODEL 75W RMS x Two Channels 125W RMS x Two Channels 235W RMS x Two Channels Distributed Exclusively by: Stellar Labs™ www.stellarlabs.com MCM Electronics www.mcminone.
Safety Information The lightning bolt within a triangle is intended to alert the user to the presence of un insulated dangerous voltage levels within the product’s enclosure. To reduce the risk of electric shock, do not remove cover of this device. There are no user serviceable parts inside. Refer servicing only to qualified service personnel. This voltage may be of sufficient magnitude to constitute an electric shock risk.
Congratulations on your purchase of this Stellar Labs SLA Series Stereo Amplifier This amplifier was designed specifically for use in distributed audio installations, where high reliability and premium sound quality are a must. Remote on/off triggering and signal sensing allow these units to be set up in equipment racks, with no further contact required. Rear mounted master level controls keep installation safe from future tampering.
Front Panel Controls Power Provides manual on/off control of the amplifier. For this control to operate normally, the rear Trigger/Auto-On/Normal selector must be in the Normal position. If using the Trigger or Auto On mode, this switch must remain in the ON position. On/Standby Indicator Bi-color lamp provides immediate indication of the amplifier status. With the power switch OFF, the lamp is not lit. With the power switch ON, and Trigger or Auto-On in STANDBY mode, the lamp is red.
Rear Panel Connections / Controls 1 2 3 4 5 6 7 L/R Line Input #1 L/R Line Input #2 L/R Input #2 Feed-through L/R Speaker Level Input Speaker Input Selector L/R Master Level Control Stereo / Bridged Selector #1) L/R Line Input #1 (priority) #2) L/R Line Input #2 (default) 8 9 10 11 12 13 14 12VDC Trigger Input 12VDC Trigger Output Power On/Off Mode Select Speaker Pair “A” Output Speaker Pair “B” Output IEC Power Line Cord Input 115/230VAC Power Selector Conventional line level input accepts signal
#3) L/R Input #2 Feed-through Output This output is provided as a convenience feed-through from the Line #2 Input. What ever source is connected to the Line #2 Input, will play through this line level output. This is ideal for daisy chaining multiple amplifiers to drive a large number of zones. This output is unaffected by the autoswitching of the SLA Amplifier, as it will always feed from the Line #2 Input.
#10) Power On/Off Mode Select This selector determines how the amplifier will be switched on and off. Normal provides completely manual operation from the front panel Power switch. Auto-On senses the presence of an input signal at Input #1 or Input #2. Upon the detection of this signal, the amplifier turns on immediately. After approximately 10 minutes of no signal, the amplifier will switch off. This mode requires the front panel POWER button to remain in the ON position.
