V15 & 15H
GUITAR AMPLIFIERS
OWNER’S MANUAL
Congratulations on the purchase of your Kustom Defender Amplifier.
Your Defender Model draws on decades of amp design and manufacturing experience at Kustom. This model was built from the ground
up to offer world-class tone, useful features and reliable performance. Inside this manual, you’ll find valuable information about the
amp’s controls and specifications. Being familiar with its features will help you effectively dial in different tones. We wish you many
years of enjoyment with your Kustom amplifier.
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V15 Front Panel
5
1
2
3
4
6
1. INPUT JACK: This is a ¼”, 2-conductor input for plugging in your instrument. It is intended for guitar but will accept other instruments
as well.
2. VOLUME: This control determines the overall volume level of the amplifier. Due to the simplicity of the Defender V15’s
all-tube circuitry, a wide range of tones can be obtained with the use of this control alone.
For example, when set in its lower ranges, the sound is clean and snappy. As the Volume control is turned up, light overdrive is
generated by the amp’s all-tube circuitry. This overdrive occurs naturally and is not created by any internal distortion circuit. As the
Volume control is turned higher (clockwise), you’ll hear increased natural drive and compression that is great for crunchy rhythms and
sustaining guitar solos. In essence, the Defender V15 generates classic overdriven tube amp tone but at lower, more manageable
volume levels. (Although you may be surprised by the amount of volume that the Defender V15 & 15H can generate, so watch your
ears!)
3. BASS RESPONSE: This control varies the low frequency response and changes how the amp sounds and feels. When turned all
the way to the left, the bass notes will have a looser, less focused sound reminiscent of vintage American tube amps. As you turn the
knob clockwise, the bass notes gain a tighter, thicker attack with a distinctly British flavor.
4. TONE: The Tone control adjusts the balance of low, middle and high frequencies. When set at 12 o’clock, thicker control provides
an even balance of all frequencies. When turned to the left, bass notes are emphasized providing a thicker tone. Turning the knob
clockwise adds high frequencies to the tone. Higher settings will provide more bite and help you cut through the mix.
5. OUTPUT POWER SELECT: This control changes the output power of the amplifier. Set to 15 Watts for maximum volume and more
headroom before the sound “breaks up” as a result of overdriving the tubes. Set to 4 Watts to achieve this distorted sound at lower
volumes.
6. POWER: This dual-function component is both an ON/OFF power switch and a status indicator light. When illuminated, it shows that
your amplifier is ready to be played. To turn your amplifier on, press switch upward. To turn amp off, press switch downward.
Note: After the power switch is turned on, the tubes must warm up for approximately one minute before you will hear sound from your
amplifier.
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15H Front Panel
5
1
2
3
4
6
1. INPUT JACK: This is a ¼”, 2-conductor input for plugging in your instrument. It is intended for guitar but will accept other instruments
as well.
2. VOLUME: This control determines the overall volume level of the amplifier. Due to the simplicity of the Defender 15H’s all-tube
circuitry, a wide range of tones can be obtained with the use of this control alone.
For example, when set in its lower ranges, the sound is clean and snappy. As the Volume control is turned up, light overdrive is
generated by the amp’s all-tube circuitry. This overdrive occurs naturally and is not created by any internal distortion circuit. As the
Volume control is turned higher (clockwise), you’ll hear increased natural drive and compression that is great for crunchy rhythms and
sustaining guitar solos. In essence, the Defender 15H generates classic overdriven tube amp tone but at lower, more manageable
volume levels. (Although you may be surprised by the amount of volume that the Defender V15 & 15H can generate, so watch your
ears!)
3. BASS RESPONSE: This control varies the low frequency response and changes how the amp sounds and feels. When turned all
the way to the left, the bass notes will have a looser, less focused sound reminiscent of vintage American tube amps. As you turn the
knob clockwise, the bass notes gain a tighter, thicker attack with a distinctly British flavor.
4. TONE: The Tone control adjusts the balance of low, middle and high frequencies. When set at 12 o’clock, thicker control provides
an even balance of all frequencies. When turned to the left, bass notes are emphasized providing a thicker tone. Turning the knob
clockwise adds high frequencies to the tone. Higher settings will provide more bite and help you cut through the mix.
5. OUTPUT POWER SELECT: This control changes the output power of the amplifier. Set to 15 Watts for maximum volume and more
headroom before the sound “breaks up” as a result of overdriving the tubes. Set to 4 Watts to achieve this distorted sound at lower
volumes.
6. POWER: This dual-function component is both an ON/OFF power switch and a status indicator light. When illuminated, it shows that
your amplifier is ready to be played. To turn your amplifier on, press switch upward. To turn amp off, press switch downward.
Note: After the power switch is turned on, the tubes must warm up for approximately one minute before you will hear sound from your
amplifier.
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V15 & 15H Back Panel
1
2
3
4
5
1. AC POWER CORD RECEPTACLE: Insert the AC cord (provided) firmly into the AC connector. NOTE: Replace the AC power cord if
protective jacket is damaged or ground pin is damaged or removed. The fuse is located in a housing just below the receptacle. Replace
only with same type and size. To remove the fuse, remove AC power cord and pull out on the tab above the fuse symbol located on the
fuse carriage. Place the new fuse in the carriage clip and re-insert.
NOTE: To prevent an electrical hazard, DO NOT replace fuse without using the fuse carriage. Replace the fuse carriage if lost
or damaged before re-inserting the AC power cord.
2. FUSE: The fuse is located in a fuse tray just below the receptacle. Replace only with the same type and size. For your convenience,
a spare fuse is located inside the fuse tray toward the front. To replace fuse, remove AC power cord.
Remove fuse tray by pulling the tab located above the fuse symbol away from the receptacle.
3: SPEAKER OUTPUTS: These 1/4” jacks are provided to connect the internal and/or external speakers to the V15.
THE AMPLIFIER SHOULD NEVER BE OPERATED WITHOUT A SPEAKER PLUGGED INTO A SPEAKER JACK.
4. DIRECT OUT: The XLR Direct Out jack is designed to connect the amplifier to a recording or live mixer. The output is speaker-
emulated, and mimics the sound of the Celestion loudspeaker. This output is very useful for direct recording, and especially helpful for
live applications since it eliminates a live microphone on stage and the resulting feedback potential.
5. GROUND LIFT: The Ground Lift switch disconnects pin 1 of the XLR Direct Out jack to eliminate a “ground loop” hum. A ground loop
can exist when the amp and the mixer it is plugged into are connected to grounded outlets that are in physically different locations and/
or on different circuits, and should only be used if there is an audible hum. Pressing the ground lift does not disconnect the ground
connection from the chassis.
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V15 Signal Flow Diagram
15H Signal Flow Diagram
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V15 Specifications
¼ inch jacks w/ impedance selector for 4 Ohm, 8 Ohm and 16 Ohm speakers
Internal Speaker 8 Ohms
Output Power
Speaker
4 / 15 Watts
1
10” Celestion
@ 1 kHz
Gain
70dB
Preamp Tube
1
2
12AX7
EL84
Poweramp Tubes
Power Requirements
USA / Canada 120VAC/60Hz 80W
Europe
UK
230VAC/50Hz 80W
230VAC/50Hz 80W
240VAC/50Hz 80W
Australia
Japan
100VAC/50-60Hz 80W
40.2H x 41.8W x 21.5D
11.8 kg
cm/Kilogram
Inches/Pounds
Dimensions / Weight
Output Power
15.8 H x 16.5 W 8.5 D
26 Lbs.
15H Specifications
¼ inch jacks w/ impedance selector for 4 Ohm, 8 Ohm and 16 Ohm speakers
Internal Speaker 8 Ohms
4 / 15 Watts
Gain
70dB
1
@ 1 kHz
12AX7
Preamp Tube
Poweramp Tubes
2
EL84
Power Requirements
USA / Canada 120VAC/60Hz 80W
Europe
UK
230VAC/50Hz 80W
230VAC/50Hz 80W
240VAC/50Hz 80W
Australia
Japan
100VAC/50-60Hz 80W
14 H x 36.7 W x 22.5 D
4.8 kg
cm/Kilogram
Dimensions / Weight
5.5 H x 14.4 W x 8.9 D
10.58 Lbs.
Inches/Pounds
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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: DEFENDER V15 & DEFENDER 15H
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.
Limits for harmonic current emissions (equipment input current < 16A per phase).
EN61000-3-2: 2006
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:
March 15, 2011
Kustom Musical Amplification INC.
3015 Kustom Drive
Hebron, Ky 41048-0568
Tel: 1-859-817-7100 Fax: 1-859-817-7150
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3015 Kustom Drive
Hebron, Kentucky
USA 41048
888-4-KUSTOM (888-458-7866)
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