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Marshall JH-1 Jackhammer Manual

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54
ENGLISH
breakup, ideal for big crunchy chords, sweet singing blues and classic
rock on Crunch mode; and from powerful overdrive to full on high gain
distortion and compressed super saturation on the Lead mode.
4. Volume
Adjusts the volume of the Jackhammer, allowing you to set the pedal
for a boost or cut in volume when in operation, should you so wish.
5. DC Input
For input of a 9V DC adaptor (as detailed previously) should you not
wish to use batteries
6. LED
Indicates when the Jackhammer is in operation.
7. Treble
Adjusts the Treble frequencies in your tone.
8. Bass
Adjusts the bass frequencies of your tone.
9. Contour Freq.
By adjusting the Contour Freq. you can govern exactly which
frequencies the Contour control (item 9) will scoop. With the Contour
Freq. set at 12 o’clock the Contour acts like a traditional Marshall
Contour control. Turning the Contour Freq. anti-clockwise cuts lower
mids and bass from your tone, while turning the Contour Freq.
clockwise will cut upper mids and treble.
10. Contour
The Jackhammer features a stunning Contour control, modelled on the
acclaimed Contour circuitry found on our Valvestate models. This
allows you to ‘scoop’ certain frequencies from your tone. This item
controls the amount of scoop in your tone. Turning clockwise will
scoop out more mid. When full counter-clockwise the Contour section,
including the Contour Frequency control, is bypassed.
11. Jack Socket
This is the input jack, for connection from your guitar or from another
effects pedal if you are linking pedals together.
12. Foot Switch
For switching the Jackhammer on and off.
WHAT IF
NO
OUTPUT
SOUND TOO
TREBLY OR
FIZZY
UNUSUAL
HUM
BASS
FEEDBACK
SOUND TOO
MUSHY OR
BASSY
UNUSUAL
FEEDBACK
INDICATOR
LED NOT
ON
NOISE IN
BYPASS
CHECK
BATTERY
CHECK
LEADS
CHECK PEDAL
CONTROLS
DC INLET
CHECK AMP
CONTROLS
CHECK GUITAR
REDUCE
TREBLE
REDUCE
TREBLE
INPUT
LEAD
Trouble Shooting
✓✓
✓
✓
✓
✓
✓
✓✓✓✓
✓
✓✓✓
✓
✓
✓✓
✓✓✓
MOVE A
W
AY
FROM AMP
PICKUPS
MAY BE
VIBRATING
4


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