Guided Tour - Front Panel1: Power switch - Use this to power the S1500 / S2000 on or off.2: Power LED - Lights whenever the S1500 / S2000 is powered on.3: Protection LED - This goes on for approximately five seconds whenever the S1500 / S2000 ispowered on and then turns off (you’ll hear a “click” when it does so). The Protection LED will also lightwhen overheating or other severe problems occur (see page 6 in this manual for more information). It isnormal for the Protection LED to fade slowly when the amp is powered off. When lit, 0 volts DC areprovided to all connected speakers, thus muting them and preventing any “thump” from occurring. For acomplete description of the conditions under which this light goes on, see the section entitled “The S1500/ S2000 Protection Circuitry” on page 6 of this manual.4: Channel input level controls - These 41-position detented knobs allow you to precisely adjust theinput level of the signal arriving at the rear-panel input jacks (see #7 on the following page). At their fullycounterclockwise position (labeled “-80 dB”), the signal is attenuated by 80 dB (essentially completelyoff). At their fully clockwise position (labeled “0 dB”), the signal is at unity gain (that is, no attenuation).When 0 dBu of signal arrives at the input jacks and the Channel input level controls are set to their fullyclockwise “0 dB” position, the S1500 / S2000 delivers full power output.5: LED meters - These three-segment LED meters continuously monitor the power output level for thecorresponding channel. For convenience, the segments are labeled, from left to right, -40 dB, -20 dB,and CLIP. The left (-40 dB) segment lights whenever input signal is present. The right (CLIP) segmentlights whenever the channel is outputting signal at full strength. For the best signal-to-noise ratio, theright (CLIP) segment should light occasionally during peak levels; if it lights frequently, you may beoverloading the S1500 / S2000 and a distorted (“clipped”) signal is probably being output. If this occursand backing off the Input Level control delivers too low an output level for your application, considerusing Bridged mode (see the “Bridged and Parallel Modes” section on page 7 in this manual for moreinformation).3CHANNEL 2CHANNEL 1PROTECTION-30dB-80dB 0dB-10dB-20dBPROTECTIONPOWERCLIP-40dB -20dB CLIP-40dB -20dB-30dB-80dB 0dB-10dB-20dBS2000OFF ON1000W X2 STEREOSAMSON45 1 2 3 4 5