Mark bass 525678 little mark iv 300 Watt Bass Amplifier Head Owner’s Manual

Mark bass 525678 little mark iv 300 Watt Bass Amplifier Head Owner’s

Manual

IMPORTANT SAFETY INSTRUCTIONS

1. Read these instructions;
2. Keep these instructions;
3. Heed all warnings;
4. Follow all instructions;
5. Do not use this apparatus near water;
6. Clean only with dry cloth;
7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions;
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat;
9. Do not defeat the safety purpose of the polarized or ground-type plug. A polarized plug has two blades with one wider than the other. A grounding-type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet;
10. Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit from the apparatus;
11. Only use attachments/accessories specified by the manufacturer;
12. Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from the tip-over (and Fig 21 DU Tipping Cart Symbol).
13. Unplug this apparatus during lightning storms or when unused for long periods of time;
14. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped;
15. “Warning: to reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture; and objects filled with liquids, such as vases, should not be placed on this apparatus”;
16. To completely disconnect this apparatus from the AC mains, disconnect the power supply cord plug fron the AC receptacle;
17. The mains plug of the power supply cord shall reamin readily accessible.
18. In case of voltage selector make sure the switch on the rear panel is on the correct voltage before connecting it to the AC power, and the fuse is the right value for that voltage (This selector is not available on the 100V version). Please change the voltage/fuse values label located near the voltage selector matching the voltage/fuse values when you need to change the voltage of the apparatus.
19. “WARNING: this apparatus must be securely attached to the floor or wall in accordance with installation instruction. Tipping, shaking, or rocking the machine may cause injury or death.”
20. TAKE CARE WHEN LIFTING

MORE INFORMATION
For warranty and service information, please contact your local Markbass distributor (contact information available at www.markbass.it). For more technical information, please visit us at www.markbass.it and out the form on the Support page. We hope you enjoy your power amp and use it to make great music!

NOTE: The Lightning Flash with arrowhead symbol within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product enclosure that may be of sufficient magnitude to constitute a risk of shock to persons.

NOTE: To be used only with altitude not exceeding 2000 m

FRONT PANEL

1. UNBALANCED 1/4” JACK INPUT
2. MUTE SWITCH
3. SOLID STATE GAIN
4. CLIP LED
5. LOW EQUALIZATION CONTROL KNOB
6. MID LOW EQUALIZATION CONTROL KNOB
7. MID HIGH EQUALIZATION CONTROL KNOB
8. HIGH EQUALIZATION CONTROL KNOB
9. OLD SCHOOL FILTER
10. LINE OUT LEVEL KNOB
11. MASTER VOLUME LEVEL KNOB
12. FOOTSWITCH INPUT
13. 3-WAY ROTARY SWITCH (FLAT/SCOOPED-MID/FSW)
14. SCOOPED-MID EQ LED
15. MAIN ON/OFF SWITCH

LITTLE MARK IV / LITTLE MARK IV 300 FRONT PANEL

LITTLE MARK IV NINJA FRONT PANEL

LITTLE MARK IV COMBO FRONT PANEL

LITTLE MARK IV / LITTLE MARK IV 300 U/ LITTLE MARK IV NINJA / LITTLE MARK IV COMBO REAR PANEL

1. AC POWER SOCKET
2. SPEAKER OUT SPEAKON / 1/4” COMBO JACK (LITTLE MARK IV NINJA: SPEAKER OUT SPEAKON)
3. SPEAKER OUT 1/4” JACK (NOT PRESENT ON LITTLE MARK IV NINJA)
4. TUNER OUT 1/4” JACK
5. RETURN EFFECT 1/4” JACK
6. SEND EFFECT 1/4” JACK
7. PRE/POST EQUALIZATION CONTROL SWITCH
8. GROUND LIFT CONTROL SWITCH
9. LINE OUT XLR

LITTLE MARK IV / LITTLE MARK IV 300 / LITTLE MARK IV NINJA / LITTLE MARK IV COMBO TECHNICAL DETAILS

COMBOS: TECHNICAL DETAILS

TROUBLESHOOTING TIPS

THERMAL PROTECTION

SYMPTOM: The amp gets hot and shuts down.
PROBABLE CAUSE: The amp has overheated, either as a result of inadequate ventilation or a damaged cooling system fan. When the amplifier cools down to a safe level, the amp will automatically restart.
SUGGESTIONS: Please verify that the fan is working properly, and that the cooling system ports are not obstructed.

CURRENT PROTECTION

SYMPTOM: The amp turns on, but there is no signal coming from the speaker/s.
PROBABLE: CAUSE Low impedance load (minimum impedance for Markbass amps is 4 ohms), or a bad speaker cable.
SUGGESTIONS: Please verify the impedance of the speaker/s connected to the amp. Note that two 4 ohm cabinets, or an 8 ohm and a 4 ohm cabinet, will result in an impedance below 4 ohms. Please check the speaker cable/s. After checking these two things, please turn the amp off and turn it on again.

If the troubleshooting steps outlined above do not solve your problem, please contact your Markbass distributor/dealer for service information. For more TROUBLESHOOTING TIPS, please check the FAQ section on the SUPPORT page of our website at www.markbass.it.

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