KXB800 BASS AMPLIFIER OWNER S MANUAL Congratulations on the purchase of your Kustom KXB800. This Bass Amp combines quality performance and convenient features in a sturdy, rack-mountable design. You ll find that the KXB800 works well in a variety of applications including live performance, rehearsal, and recording. This manual will help get you up and running quickly. We wish you many years of enjoyment from your Kustom KXB800.
CONTROLS & FEATURES OVERVIEW 1. Input: This is a ¼-inch input jack that is used to connect your bass to the amplifier s circuitry. It is designed to accommodate passive or active instruments with up to 3 volts maximum RMS output (4.2 volts peak). It is optimized for bass guitars but will accept other instruments as well. 2. 0db / -10db Switch: 0dB position is intended for bass guitars with passive pickups. Set to -10dB position for active pickups or line level signals. Maximum input = 9.5V RMS (13.4V Peak) 3. Mute: When this switch is depressed, it turns off the Speaker Outputs and Line Out so that you may tune up in silence when using a tuner connected to the Tuner Out jack. This feature is also useful when you want to unplug and change bass guitars during a live performance. When Mute is activated, its red LED will flash. 4. Signal: Indicates when sufficient signal is applied to the preamp. Adjust GAIN control so indicator is lit when notes are played. 5. Gain: Adjust this control clockwise as required to increase the amount of preamp gain. If your bass has powerful or active pickups, you may need to reduce Gain to avoid unwanted distortion. Alternately, if your bass has low output, vintage-style pickups, you may need to turn the Gain control up. Start with this control set at 12:00 to determine if further adjustment is required. 6. Clip: This feature samples gain levels at multiple locations throughout the amp s circuitry and illuminates when clipping (distortion) occurs. When this happens, turn down the Gain control until the Clip indicator only occasionally lights up. 7. Bass: This active shelving control adjusts the low-frequency equalization of the amplifier. It provides +/- 14dB boost or cut at 50 or 100 Hz. Use the switch located above the knob to select 50 or 100Hz as the Bass contol center frequency. 8. Mid: This active control adjusts the midrange frequency equalization of the amplifier. It provides +/- 14dB boost or cut. Use the switch located above the knob to select 400 or 800Hz as the Mid contol center frequency. 9. Treble: This active shelving control adjusts the high frequency equalization of the amplifier. It provides +/- 14dB boost or cut. Use the switch located above the knob to select 3 khz or 6 khz as the Treble contol center frequency. 7. Graphic EQ: This 9-band graphic equalizer provides up to 12 db of boost or cut per frequency. This is useful for adjusting your sound based on the acoustic properties of the room. Boost frequencies that sound dead, and cut problematic frequencies to eliminate feedback. 8. Graphic EQ Switch: In the On position ( ), the Graphic EQ is functional. When Off ( ), the Graphic EQ is bypassed. 9. Master Volume: This controls the overall volume level of the amplifier. 10. Power Light: Indicates when AC power is On. 11. Power: Turns the AC power On & Off.
2 3 4 5 6 1 7 8 9 10 1. Power Cord: This supplies AC power to the amplifier. If the cord becomes damaged, take the amplifier to an authorized service center for repair. 2. Speaker Outputs: Power output is 800 watts with a total minimum speaker load of 4 ohms. For full power, use two 8-ohm speaker cabinets in a parallel configuration or a single 4-ohm cabinet. A single 8 ohm cabinet may be used but less output power will be received by the speaker. 3. Pre/Post EQ: This switch selects whether the Balanced Line Out signal is taken before or after the EQ circuits. 4. Ground Lift: Activating this switch removes the ground connection on the Balanced Line Out jack. If necessary, use this switch to eliminate hum. 5. Line Out Volume: This control sets the output level for the Balanced Line Out. Set in its lower-to-middle ranges until the necessary volume has been determined. 6. Balanced Line Out: This electronically balanced XLR jack is used to connect the amplifier to a mixer or other line level device. The Pre/Post EQ switch selects the output at this jack. PIN 2 = +, PIN 3 = (-), PIN 1 = GND. 7. Footswitch: When used with a double-function footswitch such as the Kustom KACFS2B, the Mute function and the Effects Loop may individually be turned on and off. Note: If the KXB800 is used with a standard single-function footswitch and a mono cable, the Mute feature will be operational and the Effects Loop will be continuously ON. (However, if a single-function footswitch is used with a stereo cable, the Effects Loop will be bypassed.) 8. Tuner Out: Use this jack to connect a tuner or other instrument-level device. It is electronically buffered and isolated from the amp s input so it does not affect the amp s tonality in any way when in use. 9. Effects Loop Send: Use this ¼-inch jack to connect to the input of an external effects processor or equalizer. It will effectively accommodate a wide range of effects, from pedals to rack-style. This jack may also be used as a Preamp Out. 10. Effects Loop Return: Use this ¼-inch jack to connect to the output of an external effects processor or equalizer. This jack may also be used as a Power Amp In. When used as a power amp in, the master control is active. Note: The KXB800 s effects loop may be switched in and out with an external footswitch. (See Footswitch below for details.)
KXB800 Bass Head Specifications Output Power 800 Watts Avg typical 4 Ohms @ 1% THD+N 400 Watts Avg typical 8 ohms @ 1% THD+N Input Impedance Single Input 470K Ohms Gain 77 db typical Gain and Master @ Max, All EQ at 12 o'clock Nominal Sensitivity 250mV RMS Gain = 12 o'clock, Volume = 12 o'clock, tone controls = 12 o'clock S/N Ratio (System) -88 db Below rated power @ 8 Ohms Direct output Electronically Balanced XLR 700mV nominal Level Control - to 7 VRMS (Max) Tuner output Buffered off input jack Instrument Level 700 mv / 1K Ohm output Effects Send, Gain and Master at 12 Effects Loop Impedance o'clock, 700 mv / 47K Ohm input Effects Return, Gain and Master at Impedance 12 o'clock Bass +/- 14 db @ 50Hz/100Hz Amplifier Tone controls Mid +/- 14 db @ 400Hz/800Hz Treble +/- 14 db @ 3kHz/8kHz 9 Band Graphic EQ Power Requirements Dimensions and Weight 30Hz, 65Hz, 125Hz, 250Hz, 500Hz, 1kHz, 2kHz, 4kHz, 8kHz Bandwidth USA/Canada Europe UK Australia Japan Head (including rack handles, rack ears and and feet. Standard 3 rack space. NOTE: Controls set as follows for all measuremenst unless noted. Gain = 12 o'clock Master = 12 o'clock All EQ Knobs = 12 o'clock +/- 12 db at each frequency Q = 2 120 VAC / 60 Hz / 800W 230 VAC / 50 HZ / 800W 240 VAC / 50 Hz / 800W 240 VAC / 50 Hz / 800W 100 VAC / 50-60 Hz / 800W 35 LBS / 16 KG 19" W X 5.38" H X 15.63" D 483mm X 137mm X 397mm
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EC Declaration of Conformity We: Kustom Musical Amplification INC. 3015 Kustom Drive Hebron, Ky 41048-0568 Tel: 1-859-817-7100 Fax: 1-859-817-7150 Declare that the product Product name: Kustom Product model number: KXB800 to which this declaration relates is in conformity with the following standards; EN55013: 2001/+A1: 2003+A2: 2006 Limits and methods of measurement of radio disturbance characteristics of broadcast receivers and associated equipment. EN55020: 2007 Electromagnetic immunity of broadcast receivers and associated equipment. EN61000-3-2: 2006 Limits for harmonic current emissions (equipment input current < 16A per phase). EN61000-3-3: 2008 Limitation of voltage fluctuations and flicker in low voltage supply systems for equipment with rated currents < 16A. EN60065: 2002+A1: 2006+A11: 2008 Safety requirements for main operated electronic and related apparatus for household and similar general use. Following the provisions of EU Council Directive(s): 72/73 EEC and 89/336/EEC. We the undersigned, hereby declare that the equipment specified above conforms to the aforementioned directive(s). Name of authorized person: James Brown, Chief Engineer Signature: Date: August 11, 2011 Kustom Musical Amplification INC. 3015 Kustom Drive Hebron, Ky 41048-0568 Tel: 1-859-817-7100 Fax: 1-859-817-7150
www.kustom.com 3015 Kustom Drive Hebron, Kentucky USA 41048 888-4-KUSTOM (888-458-7866)