ENGLISH Operation Manual Other languages can be downloaded from: WWW.JB-SYSTEMS.EU Version: 1.
ENGLISH USER MANUAL OPERATION MANUAL Thank you for buying this JB Systems® product. To take full advantage of all possibilities, please read these operating instructions very carefully.
ENGLISH USER MANUAL • To prevent fire or shock hazard, do not expose this appliance to rain or moisture. • To avoid condensation to be formed inside, allow the unit to adapt to the surrounding temperatures when bringing it into a warm room after transport. Condense sometimes prevents the unit from working at full performance or may even cause damages. • This unit is for indoor use only. • Don’t place metal objects or spill liquid inside the unit.
ENGLISH USER MANUAL 1. MAINS SWITCH: Used to turn the amplifier on and off. A few seconds after switching on the amplifier it is ready for operation. 2. POWER LED: This white led is on when you turn the amplifier on using switch (1). 3. SIGNAL LEDS: these LEDs indicate that a music signal is present at the inputs. 4. OPERATION MODE LED: Shows if the amplifier is in bridge mode, stereo mode or mono mode 5. CLIP LEDS: Lit just before the maximum, distortion free, output level of the amplifier.
ENGLISH USER MANUAL FUNCTIONS (rear) 11. VENTS: these openings allow the amplifier to be properly cooled by the built-in fans. Make sure these are not covered and clean them promptly 12. POWER input: Use the supplied power cable to connect the amplifier to the mains. This connector also holds a 20mm glass fuse. Always replace a blown fuse by another with exactly the same specifications. (fuse specifications can be found on the rear panel, next to the power input connector) 13.
ENGLISH USER MANUAL • BRIDGE: used when you need more power. Only the mono signal on input INC (15) is used to drive the combined “bridged” output OUT.C (19). Only speakers with impedance >8ohm are allowed. IMPORTANT: the wiring of the CHA speaker connector in bridge mode is DIFFERENT ! Check the information about the speaker outputs below 25. HIGH PASS filter switch: When ON, only frequencies above 120 Hz will be sent to the output(s) OUT.C & OUT.D.
ENGLISH • • • • • • • USER MANUAL Connect the mono audio signals to the inputs IN.A (13) and IN.C (15) Set the operation mode switches (22&24) to “MONO” Connect the speakers to the outputs. Set input gain knobs (7/8/9/10) to zero Make sure there’s a music signal at the input Turn the amplifier on (1) Adjust the gain knobs (7&9) to the desired level (knobs 8&10 are not used) 2 CHANNEL BRIDGE MODE: When more power is needed you can combine the power of 2 amplifier channels on 1 single output: IN.A → OUT.
ENGLISH USER MANUAL 3 CHANNEL “2 SAT + SUB” MODE: You can use the amplifier to drive 2 satellite speakers + a mono subwoofer (no external crossover needed). The subwoofer will be driven in bridge mode for more power. IN.C → OUT.C = Satellite L 100Wrms @ 8Ω ~ 200Wrms @ 4ohm IN.D → OUT.D = Satellite R 100Wrms @ 8Ω ~ 200Wrms @ 4ohm IN.C + IN.D → OUT.A = Subwoofer = 1x 400W @ 8 ohm. Attention: loads below 8Ω are NOT allowed IMPORTANT: the wiring of the CH.
