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KB-75/KB-150 Keyboard Amplifier Manual

1. LEVEL 1 AC VOLTAGE SELECTOR SWITCH 1 115V 60Hz or 230V 50Hz Main Line Out 2 XLR Send Return Jacks Mains 3 and 4 114 Headphone Jack 5 1 4 CH5 Monitor Input Jack 6 1 4 Channel 4 Channel 3 input on KB 75 High impedance Input 7 1 4 1 4 Channel 4 Channel 3 input on KB 75 low impedance Input 8 114 male XLR Channel 4 Channel 3 input on KB 75 Send Return Jack 9 and 10 1 4 Channel 3 2 amp 1 Channel 2 amp 1 on KB 75 inputs 11 12 and 13 xx 114
2. 1 4 External Speaker Jack 14 1 4 8 IEC Connector detachable Line Cord 15 EC KB 75 150 indd 11 2 2009 6 24 _ 115V 230V 50 60Hz 1 2 4 5 6 7
3. 5 IN XLR CH5 Monitor Level 8 5 1 4 Phone Plug Headphone Level 9 Master Level 10 DDT Selector 11 0UT 0UT 10 KB 75 150 indd 10 2 2009 6 24 _ Power Switch 12 0N
4. 16CM 8 9 11 12 13 14 FABRA Ale 15 e KB 75 150 indd 12 2 2009 6 24
5. i KB 75 KB 150 Keyboard Amplifier English Chinese Owner Manual 75 150 indd 1 2 2009 6 24 _ ENGLISH KB 75 KB 150 Keyboard Amplifiers Thank you for selecting the KB 75 KB 150 keyboard amplifier Once again our engineers have listened to input from keyboard players and put together an amplifier that combines excellent features and sound in one portable package The new KB 75 KB 150 Series amplifiers deliver awesome sound reproduction for all of your keyboard sounds from thundering bass to crystal highs it s all there Before you begin to play through your amp it is very important to ensure the product has the proper AC line voltage supplied You can find the proper voltage for your amp printed next to the IEC line power cord on the rear panel of the unit In addition an external speaker jack is provided for the additional use of an external speaker enclosure This feature is located on the rear panel as well and is also explained in this section Each product feature is numbered Refer to the front and rear panel diagrams in this manual to locate the particular features next to their number Please read this guide carefully to ensure your personal safety as well as the safety of your amplifier Features 4 channel KB 75 or 5 channel KB 150 75 watts KB 75 or 150 watts KB 150 plenty of power ultra strength retractable locking handle for easy transport just lock it lean it
6. DDT Selector 11 This switch controls our s exclusive DDT Distortion Detection Technique speaker protection With this switch in the OUT position a unique circuit senses signal conditions that might overload the amplifier and activates compression to reduce gain and avoid clipping This technique utilizes every watt available for the amplifier to reproduce the signal yet minimizes clipping and distortion which reduces the potential for speaker damage Since this function is invisible at levels below the clipping point it is advised that it be activated at all times Setting this switch to the IN position defeats this protection feature allowing potential power amp clipping and the resultant increase in likelihood of speaker damage Power Switch 12 This two way rocker switch applies power to the unit when placed in the ON position KB 75 150 indd 4 2 2009 6 24 REAR PANEL AC VOLTAGE SELECTOR SWITCH 1 Before plugging in the power cord check to see that the unit is set for the proper voltage for your area 115V 60Hz 230V 50 2 A cover plate is provided to ensure that this switch is not accidently reset or tampered with between uses Main Line Out 2 These low noise electronically balanced XLR connectors can be used to route signals to a mixing console recording device etc Send Return Jacks Mains 3 amp 4 Two stereo pairs of 1 4 jacks allows the use of various auxiliary uni
7. KB 75 150 indd 7 _ 150 SPECIFICATIONS Right 1 dBV 1 1 V RMS Minimum 16 dBV 158 mV RMS Headphone output Load Impedance 8 Ohms or greater Nominal Output 100 mW RMS Main line out Output Impedance lt 100 Output Level 18 dBV POWER AMPLIFIER SECTION Rated power and load 200 Watts RMS 4 Ohms or 150 Watts RMS 8 Ohms with DDT off kHz 1 THD 120 VAC line Frequency response 0 1dB 20Hz 20kHz 100 Watts RMS 8 Ohms KB 75 SPECIFICATIONS Right 1 dBV 1 1 V RMS Minimum 16 dBV 158 mV RMS Headphone Output Load Impedance 8 Ohms or greater Nominal Output 100 mW RMS Main Line Out Output Impedance lt 100 Output Level 18 dBV POWER AMPLIFIER SECTION Rated Power and Load 100 Watts RMS 4 Ohms or 75 W RMS 8 Ohms with DDT off 1 kHz 1 THD 120 VAC line Frequency Response 0 1dB 20 Hz 20 kHz 60 Watts RMS 8 Ohms Total harmonic distortion Less than 0 01 1 kHz 8 Ohms Typically less than 0 08 20 Hz 20kHz DDT dynamic range Greater than 20 dB DDT maximum THD Below 0 5 THD for 6 dB overload Below 1 THD for 20 dB overload Hum and noise Greater than 100 dB below rated power Power consumption 300 Watts 115V AC 50 60 Hz domestic 300 Watts 230V AC 50 60 Hz export Total Harmonic Distortion Less than 0 01 1 kHz 8 Ohms Typically less than 0 08 20 Hz 20kHz DDT Dynamic Range Greater than 20 dB DDT Maximum THD Below 0 5 THD for 6 dB over
8. 5 DDT 6 mainjmonitor monitor 7 KB 75 KB 150 8 9 EQ KB 75 150 indd 9 2 2009 6 24 _ LEVEL 1 Level 1 1 4 Low EQ 2 shelving 2529 1548 Hi EQ 3 shelving 15dB High Z Level 4 1 4 phone Low Z Level 5 male XLR Mid EQ 6 Peakinotch 15dB Main Monitor 7 0UT
9. back and go balanced stereo line outs stereo send return jack extension speaker capability QUICK SET UP GUIDE 1 Connect the line cord to the appropriately rated receptacle 2 Be certain that all levels are down or set to the fully counter clockwise position and set all the EQs flat 3 Set the master level to the 12 00 position 4 Connect left output of your keyboard to the left input of the KB 75 KB 150 and connect right output of your keyboard to the right input of the KB 75 KB 150 5 Set the DDT switch to the enable position 6 Set the main monitor switch to the monitor position 7 Turn on power to the KB 75 KB 150 8 Adjust the channel level for proper volume 9 Adjust the channel EQ as needed KB 75 150 indd 2 2 2009 6 24 FRONT PANNEL CHANNEL 1 CHANNEL 2 CHANNEL 3 CHANNEL 4 5 5 Level 1 Controls the 1 4 jack input level Channels 1 2 and 3 the KB 150 and channels 1 and 2 on the KB 75 Low 2 An active tone control shelving type 15dB that varies the low frequency range KB 150 channels 1 2 amp 3 KB 75 channels 1 amp 2 A Caution Excessive low frequency boost causes greater power consumption and increases the possibility of speaker damage Hi EQ 3 An active tone control shelving type 15dB that varies the hi frequency range KB 150 channels 1 2 amp 3 KB 75 channels 1 amp 2 High Z Level 4 Controls
10. the high impedance microphones or other high level sources equipped with a 1 4 phone plug Low Z Level 5 Controls the low impedance microphones or other low level sources equipped with a male XLR connector Mid EO 6 An active tone control peak notch type 15dB that varies the mid frequencies Channel 4 on J KB 75 150 indd 3 2 2009 6 24 _ the KB 150 and channel 3 on the KB 75 Main Monitor 7 This affects what signal is sent to the headphones When in the OUT position only the signal from channel 5 is sent to the headphones Great when you need to hear a click track or midi pre recorded track When engaged IN position the headphones are sent signals from all channels Keep in mind this signal is never sent to the Main XLR outs CH5 Monitor Level 8 Controls the input level for channel 5 Controls high impedance microphones or other high level sources equipped with a 1 4 phone plug Headphone Level 9 This sets the level to the headphone jack on the rear panel To avoid damage to your hearing make sure to turn the dial fully counter clockwise before using headphones Slowly turn the knob clockwise until a comfortable listening level is set This does not affect the master level Master Level 10 This knob sets the overall level for the unit Make sure the Master level is completely down full counterclockwise before powering up the unit This does not affect the headphone level
11. 75 KB 150 KB 4 KB 75 5 KB 150 75 KB 75 150 KB 150 1 2 EQ 3 Master Level 12 00 4
12. load Below 1 THD for 20 dB overload Hum and Noise Greater than 100 dB below rated power Power Consumption 150 Watts 115V AC 50 60 Hz Domestic 150 Watts 230V AC 50 60 Hz Export 2009 6 24 _ IMPORTANT SAFETY INSTRUCTIONS WARNING When using electric products basic cautions should always be followed including the following 1 Read these instructions 2 Keep these instructions 3 Heed all warnings 4 Follow all instructions 5 Do not use this apparatus near water For example near or in a bathtub swimming pool sink wet basement etc 6 Clean only with a damp cloth 7 Do not block any of the ventilation openings Install in accordance with manufacturer s instructions It should not be placed flat against a wall or placed in a built in enclosure that will impede the flow of cooling air 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 grounding 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 plug The wide blade or third prong is provided for your safety When the provided plug does not fit into your inlet consult an electrician for replacement of the obsolete outlet Never break off the grounding Write for our free booklet Shock Hazard and Grounding Co
13. nnect only to a power supply of the type marked on the unit adjacent to the power supply cord 10 Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point they exit from the apparatus 11 Only use attachments accessories provided by the manufacturer 12 Use only with a cart stand tripod bracket or table specified by the manufacturer or sold with the apparatus When a Carl is used use caution when moving the cart apparatus combination to avoid injury from tip over 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 If this product is to be mounted in an equipment rack rear support should be provided KB 75 150 indd 8 2 2009 6 24 75 150 KB 75 KB 150 KB 75 KB 150 KB
14. s cord should be connected to the amplifier before connecting to a suitable AC outlet KB 75 150 indd 6 2 2009 6 24 PREAMP SECTION The following preamp specs are measured 1 kHz nominal signal levels are with channel level controls set at 5 minimum levels are with channel level controls set at 10 Channel 1 2 and 3 inputs Input Impedance 100K Left Mono Nominal Input Level 22 dBV 79 mV RMS Minimum Input Level 40 dBV 10 mV RMS Nominal Input Level 15 dBV 178 mV RMS Minimum Input Level 33 dBV 22 mV RMS Channel 4 input Low Z Input Impedance 5 k Ohms Nominal Input Level 28 dBV 40 mV RMS Minimum Input Level 48 dBV 4 mV RMS High Z Input Impedance 100 Left Nominal Input Level 5 dBV 560 mV RMS Minimum Input Level 22 dBV 79 mV RMS PREAMP SECTION The following preamp specs are measured 1 kHz nominal signal levels are with channel level controls set at 5 minimum levels are with channel level controls set at 10 Channel 1 and 2 Inputs Input Impedance 100 k Left Mono Nominal Input Level 22 dBV 79 mV RMS Minimum Input Level 40 dBV 10 mV RMS Nominal Input Level 15 dBV 178 mV RMS Minimum Input Level 33 dBV 22 mV RMS Channel 3 Input Low Z Input Impedance 5K Ohms Nominal Input Level 28 dBV 40 mV RMS Minimum Input Level 48 dBV 4 mV RMS High Z Input Impedance 100 k Left Nominal Input Level 5 dBV 560 mV RMS Minimum Input Level 22 dBV 79 mV RMS
15. ts effects units equalizers etc in line before the power amp section Headphone Jack 5 This 1 4 jack accepts stereo headphones only CH5 Monitor Input Jack 6 Use this 1 4 jack to connect to the output of any line level device Channel 4 Channel 3 input on KB 75 High Impedance Input 7 This pair of 1 4 jacks accepts high impedance microphones or line level sources equipped with left and right 1 4 phone plugs KB 75 150 indd 5 2 2009 6 24 _ Channel 4 Channel 3 input on KB 75 Low Impedance Input 8 For use with low impedance microphones or other line level sources equipped with a male XLR connector Channel 4 Channel 3 input on KB 75 Send Return Jack 9 amp 10 This pair of 1 4 jacks allows the use of various auxiliary units effects units equalizers etc in line Channel 3 2 amp 1 Channel 2 amp 1 on KB 75 Inputs 11 12 amp 13 This pair of 1 4 jacks accepts high impedance microphones or line level sources equipped with left and right 1 4 phone plugs External Speaker Jack 14 This 1 4 jack provides the powered signal from the amplifier Use this jack to add a second speaker cabinet in parallel The external minimum speaker load impedance is 8 ohms IEC connector detachable line cord 15 This is a standard IEC power connector An AC mains cord having the appropriate AC plug and ratings for the intended operating voltage is included in the carton The main

KB-75/KB-150 Keyboard Amplifier Manual

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