CARVIN ENGINEERING DATA
CARVIN ENGINEERING DATA
This symbol is intended to
alert the user to the
presence of uninsulated “dangerous voltage” within the
product’s enclosure that may
be of sufficient magnitude to constitute a
risk of electric shock to persons.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
This symbol is intended
to alert the user to the
presence of important
operating and maintenance (servicing) instructions
in the literature accompanying the
appliance.
IMPORTANT! FOR YOUR PROTECTION, PLEASE READ THE FOLLOWING:
WATER AND MOISTURE: Appliance should not be used near water (near a bathtub, washbowl, kitchen sink, laundry
tub, in a wet basement, or near a swimming pool, etc). Care should be taken so that objects do not fall and liquids are
not spilled into the enclosure through openings.
POWER SOURCES: The appliance should be connected to a power supply only of the type described in the operating
instructions or as marked on the unit.
GROUNDING OR POLARIZATION: Precautions should be taken so that the grounding or polarization means of
an appliance is not defeated.
POWER CORD PROTECTION: Power supply cords should be routed so that they are not likely to be walked on or
pinched by items placed upon or against them, paying particular attention to cords at plugs, convenience receptacles,
and the point where they exit from the appliance.
SERVICING: The user should not attempt to service the unit beyond that described in the operating instructions.
All other servicing should be referred to qualified service personnel.
FUSING: If your unit is equipped with a fuse receptacle, replace only with the same type fuse. Refer to replacement
text on the unit for correct fuse type.
SAFETY INSTRUCTIONS (EUROPEAN)
The conductors in the AC power cord are colored in accordance with the following code.
GREEN & YELLOW—Earth
BLUE—Neutral
BROWN—Live
U.K. MAIN PLUG WARNING: A molded main plug that has been cut off from the cord is unsafe.
NEVER UNDER ANY CIRCUMSTANCES SHOULD YOU INSERT A DAMAGED OR CUT MAIN PLUG
INTO A POWER SOCKET.
CAUTION
RISK OF ELECTRIC SHOCK
X-100B TUBE GUITAR AMP
OPERATING MANUAL
LIMITED WARRANTY
Your Carvin product is guaranteed against failure for ONE YEAR unless otherwise stated. Vacuum
tubes are guaranteed for 90 days. Carvin will service and supply all parts at no charge to the customer
providing the unit is under warranty. Shipping costs are the responsibility of the customer.
CARVIN DOES NOT PAY FOR PARTS OR SERVICING OTHER THAN OUR OWN. A COPY OF
THE ORIGINAL INVOICE IS REQUIRED TO VERIFY YOUR WARRANTY. Carvin assumes no
responsibility for horn drivers or speakers damaged by this unit. This warranty does not cover, and
no liability is assumed, for damage due to: natural disasters, accidents, abuse, loss of parts, lack
of reasonable care, incorrect use, or failure to follow instructions. This warranty is in lieu of all other
warranties, expressed or implied. No representative or person is authorized to represent or assume
for Carvin any liability in connection with the sale or servicing of Carvin products. CARVIN SHALL
NOT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES.
RECEIVING INSPECTION—read before getting started
INSPECT YOUR AMP FOR DAMAGE which may have occurred during shipping. If damage
is found, please notify the shipping company and CARVIN immediately.
SAVE THE CARTON & ALL PACKING MATERIALS. In the event you have to re-ship your unit,
always use the original carton and packing material. This will provide the best possible protection during shipment. CARVIN and the shipping company are not liable for any damage caused
by improper packing.
SAVE YOUR INVOICE. It will be required for warranty service if needed in the future.
SHIPMENT SHORTAGE. If you find items missing, they may have been shipped separately.
Please allow several days for the rest of your order to arrive before inquiring.
RECORD THE SERIAL NUMBER on the enclosed warranty card or below on this manual
for your records. Keep your portion of the card and return the portion with your name and
comments to us.
SERVICE
In the USA go to www.carvinservice.com
Outside the USA, contact your dealer or go to http://www.carvinworld.com for your nearest service
center. Include a written description of the problem with serial number and date of purchase.
HELP SECTION
1) AMP WILL NOT TURN ON
Check the power to the amp. Check for tripped circuit breakers, unplugged extension cords or
power-strip switches that may be turned off. Check the fuse. If a dark brownish color or no wire
can be seen within the glass tube, then replace. The amp may be perfectly fine but occasionally
a fuse may blow because of high AC voltage surges. After the fuse has been replaced with
the proper Slow Blow value and if the fuse fails again, the amp will require servicing.
2) NO OUTPUT with POWER LIGHT ON
Tubes damaged in shipping will be the primary reason for your amp to not function properly.
Please give us a call to help guide you through this simple repair.
3) KEEP YOUR AMP LOOKING NEW
Use a damp cloth to wipe the controls on the front & rear chassis panels.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL!
THIS UNIT CONTAINS HIGH VOLTAGE INSIDE!
Congratulations on your purchase of your X-100B series IV tube amplifier.
Carvin has been building tube guitar amplifiers since 1949. Spend time with
your new amp and get to know its many sounds. You’ll discover why many
creative guitarists have choosen the X-100B to achieve thier sound.
HISTORY OF THE X-100B
The X-100B holds a place dear in the hearts of guitar amp affectionados. The X100B
series tube amps were a mainstay on many arena stages and MTV videos throughout the
1980’s. Artists such as Frank Zappa, Craig Chaquico with Jefferson Starship, Warrant,
Warren Cuccurullo with Missing Persons, and Steve Vai all played X100B amps. Frank
Zappa raved about the Clean channel on this amp. Steve Vai recorded a song called “Blue
Powder” (available on his first solo release Flexable) featuring the X100B. As a tribute
to the original X100B amps, the new Series IV is badged with the vintage Carvin logo.
HIGH IMPEDANCE GUITAR INPUT
Carvin has long known about the effects of miss-loading a guitar pickup, which can
cause high frequency loss. The X-100B guards against this loss with its high input
impedance. We also considered the capacitance of the average shielded guitar cable
which can reduce the high frequency response of your guitar pickups. Careful component
layout and lead placement control oscillations and noise without extra capacitance in the
circuit, allowing shimmering highs to be reproduced faithfully.
FLEXIBLE DESIGN
The circuitry of the X-100B allows several layers of control over the dynamics and
tone of the amp from the input jack to the speaker output.
PREAMP
Great sounds start with a great preamp. The glassy clean sounds of the Rhythm
channel sparkle even more in the Bright setting. The Lead channel Drive control is combined with a Hi Gain switch for highly selective control over the 12AX7 tube overdrive.
TONE CONTROLS
The BASS, MID, TREBLE, and PRESENCE use active circuits to create a wide range
of cut or boost from each control.
5-BAND MASTER EQ
c
12340 World Trade Drive, San Diego, CA 92128
(800) 854-2235 www.carvin.com
The X-100B features a five band graphic EQ that is assignable to the Lead or Rhythm
channel. An extreme amount of control is available here, allowing you to define your
sound in a way not available on most amps.
SWITCHABLE EFFECT LOOP
The X-100B features a switching effect loop for true bypass of effects.
CUSTOM REVERB
The X-100B reverb is custom designed for a full, natural sound. The “long tail” switching
system turns off only the send to let the reverb to decay without being cut off.
POWER AMP CONTROL
The RMS POWER switch not only reduces maximum output, but also lets you drive the
power amp into saturation at lower volumes while using all four tubes.
Model X-100B AMP Specifications:
RMS Power:
100, 50 or 25 watts, switchable
Output Impedance:
4, 8 or 16ohm, switchable
Input Impedance:
220,000 ohms
Tone Controls:
BASS, MID, TREBLE, PRESENCE
Graphic EQ:
5-band, 18dB boost or cut
Channels:2—switchable
Ch 1 Sensitivity:
1mV for clipping
Ch 2 Sensitivity:
16mV for full output
footswitch functions:
4: channel, reverb, effect loop and boost/mute
Voiced Line Out:
1.5 VAC @ 100 watts RMS
Preamp Tubes:
3—12AX7’s (dual stage)
Power Amp Tubes:4—EL34
USA Model:
120VAC, 300VA
6A , slow blow fuse, 5x20mm
Export Model:
230VAC, 300VA
3A, slow blow fuse, 5x20mm
Cabinet Size:Head: 25.25”W x 10.5”H x 9.5”D
Cabinet:
7-ply poplar/hardwwood
Net Weight:
35 lbs
Warranty:
One Year
Country of Mfg:
Made in USA
Options:-CV3200
-FS44L footswitch - 4 function
-FS22 footswitch - channel and reverb
-GX412T or GX412B
(matching 4x12 speaker cabinets)
GIVE YOURSELF A BOOST OR KEEP IT QUIET
The Master volume control can be configured as a variable volume Boost, available
by footswitch. When engaged, it will boost your amp’s output by up to 9dB for solos
or any time you need to stand out in the mix. The footswitch will MUTE the amp in
Master mode, allowing you to switch guitars quietly.
EL34 POWER TUBES
Your amp is equipped with EL34 power tubes because of their powerful output and
responsive tone. The characteristics of these power tubes respond to the wide dynamic
range of guitar playing. If you play soft the tubes remain clean and if you increase
your attack they respond accordingly.
76-22100B 0208
c
12340 World Trade Drive, San Diego, CA 92128
(800) 854-2235 www.carvin.com
For your records, you may wish to record the following information.
Serial No._____________________ Invoice Date_______________
X-100B front & rear panel controls
GETTING STARTED QUICKLY
If you are like most players, you probably want to plug
in your new amp and get playing right away. You can
read the rest of the manual later to learn the finer points
of operating your amp. In order to get started you will
need your X-100B amp, a 120 (or 230) AC grounded
power outlet, your instrument, and a standard guitar
cord. If you have the X-100B head version you will also
need a speaker cord and speaker cabinet.
Plug in your speaker and set the “SPEAKER OHMS”
switch to match your speaker. If you have the FS44L
footswitch, plug it into the rear 5-pin “FS44L” footswitch
jack. Or, if you have the FS22 footswitch, plug it into the
rear 1/4 inch “FS22” footswitch jack. Turn all volume
controls off. With the amp turned off, you may then plug
it into the proper AC voltage.
Now, plug in your guitar and turn the POWER (1 / 0)
switch to ON ( 1 ). Wait 60 seconds or more for the tubes
to warm up, then turn the STANDBY switch to OPERATE.
The amp will be ready to play in a few seconds. Gradually
raise the channel volume and master volume controls and
re-adjust the tone controls to your liking. Please call if
you feel your amp is malfunctioning. Occasionally tubes
are damaged in shipping.
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21
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23
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FRONT PANEL
1. POWER SWITCH
(1/0)
The POWER switch is to be utilized as the master ON/OFF
( 1 / 0 ) switch. One of the two large RED LED’s near the
LEAD or RHYTHM controls will illuminate to indicate the
power is ON.
8. MASTER VOLUME / BOOST LEVEL
After turning the POWER switch ON, wait 60 seconds or
more for the tubes to warm up - then turn on the STANDBY
switch to OPERATE. When turning the amp OFF, first turn
the switch to STANDBY, then shut off the POWER switch.
Use the STANDBY switch if you are taking a break. This
turns the high voltage off, increasing the life of your power
tubes while keeping the power and preamp tube filaments
on for immediate use.
FS BOOST switch OFF: Use the MASTER to change the
overall volume level for the amp when the FS BOOST switch
is OFF. The FS44L can mute the amp output while changing
guitars or for quiet passages in the music when the guitar
is not played The red LED over the MASTER will turn OFF
when the amp is MUTED by the footswitch.
FS BOOST switch ON: The MASTER is bypassed, and
the volume of the amp is controlled only by the RHYTHM
and LEAD settings. The MASTER control is used to set an
overall volume boost of up to 9dB, activated by the FS44L
footswitch. The red LED over the MASTER will indicate the
BOOST is ON.
3. EQ ASSIGNMENT SWITCH (LEAD/RHY)
9. CHANNEL SWITCH
Use this switch to select which channel (LEAD or RHYTHM)
is shaped by the GRAPHIC EQ.
In the DOWN position, the RHYTHM channel is selected for
open, clean sounds with lots of headroom.
In the UP position, the LEAD channel is selected for overdriven sounds with tube harmonics and sustain.
The channel can also be changed by footswitch. Leave
the switch in the DOWN position when using the footswitch.
The LEDs near the LEAD or RHYTHM controls indicate which
channel is selected.
2. STANDBY / operate SWITCH
4. GRAPHIC EQualizer
The GRAPHIC EQ is a powerful sound shaping tool.
Each fader controls up to18dB of boost (slide up) or cut
(slide down) for each of the 5 frequency ranges labeled
underneath .
Select the channel to be EQ’d with the EQ ASSIGNMENT switch
(#3), LEAD or RHYTHM.
5. REVERB CONTROL
The X-100B has been custom designed with a lush, natural
sounding reverb system. Adjust the amount of reverb with
the REVERB control. Reverb can be turned off by remote
footswitch. Only the send is turned off to allow the end of
the reverb to decay without being cut off.
6. ACTIVE TONE CONTROLS
To start, set the BASS, MID & TREBLE controls at their
center (5) position. These controls are to be set according to
the type of sound you want. For added clarity, the PRESENCE
controls only the highest guitar harmonics in the 5kHz-10kHz
range. Careful adjustment with the TREBLE control makes
this feature even more useful.
7. FS BOOST SWITCH
This switch changes how the MASTER volume control
works. With this switch OFF, the MASTER control works
normally. In the FS BOOST position, the volume of the amp is
set to maximum and the volume of the amp will be set by
the RHYTHM or LEAD controls only. (see below for more)
10. LEAD VOLUME
When the LEAD channel is active, the volume is adjusted
with the LEAD control.
11. GAIN SWITCH
The GAIN switch changes the gain structure of the LEAD
channel:
OFF (DOWN)- with the DRIVE control, go from a bluesy
breakup to a dynamic crunch overdrive.
GAIN (UP)- increases the amount of drive available, allowing thick distortion harmonics.
12. DRIVE CONTROL
As the DRIVE is turned up, tube harmonics and sustain are
increased. The GAIN switch (#11) also affects the drive.
For textured harmonics with mild tube overdrive, turn the
DRIVE control below “4”. For increased harmonics and
more tube saturation, set the control between 4 & 6. For full
blown distortion turn on the GAIN switch and set the DRIVE
control between 7 and 10 (your guitar volume should be
turned all the way up). Because the X-100B has been “Hot
Rodded” with so much gain, you may encounter feedback. If
feedback is a problem, reduce the DRIVE or move the guitar
to the side or away from the speaker(s).
13. RHYTHM VOLUME
When the RHYTHM channel is active, the volume is adjusted
with the RHYTHM control.
14. BRIGHT SWITCH
The BRIGHT switch adds high end to the preamp, inviting
high frequencies to ring out more easily.
15. GUITAR INPUT
A standard 1/4” input jack feeds the signal from your guitar
to the amp. Use a professional quality guitar cord no longer
than 25 feet. Typical cable capacitance should be under
50pf—the longer the cord, the greater the capacitance (you
can measure this with a capacitance meter). A long cable
with high capacitance will reduce the overall treble response
from your pickups.
REAR PANEL
16. SPEAKER output JACKs
Two 1/4” SPEAKER JACKS are featured to operate several
speaker systems at the same time. Calculate the total speaker
impedance based on parallel wiring as the speaker jacks are
wired in parallel. Select the IMPEDANCE SWITCH for the
correct impedance.
17. SPEAKER OHMS (impedance) SWITCH
The IMPEDANCE SWITCH offers the selection of 4 ohm,
8 ohm or 16 ohm to match your speaker system. The
correct setting for two 16 ohm speakers or cabinets would
be 8 ohms. The correct setting for two 8 ohm speakers or
cabinets would be 4 ohms. Select the proper impedance.
18. RMS POWER SWITCH
The 3-position RMS POWER switch reduces the 100watt
output of the amp down to 50 or 25 watts, while still using all
four output tubes. Lower settings will allow the great sound
and feel of the tube power amp being overdriven, but at lower
volume levels. For maximum output power and headroom
set the switch to 100watts. For early power amp saturation
move this switch to 50watts. Setting this switch to 25watts
can change the sound dramatically if desired, by turning up the
MASTER or using the FS BOOST (#7) to produce even more
power amp overdrive!
19. POWER TUBE BIAS SWITCH
If you desire to change to power tubes, you may do so by
selecting the external BIAS switch on the rear panel. Be sure
that this switch is set to the proper position or excessive
heat will damage your tubes. The amp should be re-biased
when replacing the output tubes.
*CAUTION! - The presence of high voltage inside tube amps
can cause death or serious injury!
Tube amp biasing should be performed by a qualified
technician. Do not attempt if you are unsure of your ability
to perform this operation safely. To set the bias, measure
the current across the terminals of the standby switch
(set the switch to STANDBY when the amp is ON). With
internal trim control P10, set the idle current to 100 mA DC
for all tube types.
20. LINE OUT
The LINE OUT jack is a fully balanced XLR output for connecting to power amps or mixers without the need for a direct
box. All power amp dynamics are captured in this signal,
including the RMS POWER setting. The output level is more
than adequate to drive any professional mixer or power amp.
21. EFFECTS LOOP
The EFFECTS LOOP is a standard series loop. This means
it sends all signals through your processor. To use the
EFFECTS LOOP, plug the INPUT of your effects into the SEND
jack and the OUTPUT of your effects into the RETURN jack.
Use shielded cables, not speaker cables. Adjust the processor’s MIX setting to your liking. If your processor has a
“Direct signal ON/OFF” setting, it is usually better to turn it ON.
5x20mm, 6A SLO-BLOW (3A SLOW BLOW for
240VAC)
If no problem is found and the fuse still blows, your amp
may need service.
26. AC Voltage selector
BEFORE you insert the AC cord into it’s receptacle, make sure
the AC voltage switch is set for your region (120VAC in the
USA), and remove the warning label. The wrong setting may
cause severe damage to your amp and will not be covered
by the warranty.
For the 240VAC setting, replace the fuse with a 3A fuse
before operating.
22. LOOP LEVEL
The LOOP LEVEL switch allows the X-100B to accomodate
a variey of devices. If the input of your processor is being
overloaded, use a lower setting. If you are getting excess
noise from your processor, try the 0 or +4 setting. 0dB is
typical for most applications.
23. FS44L FOOTSWITCH JACK
Use only the Carvin FS44L (recommmended) or Carvin
FS44. Other footswitches will not work.
* DO NOT use MIDI devices in this jack! *
24. FS22 FOOTSWITCH JACK
The switches on the FS22 footswitch control the channel
selection and reverb. Most foot pedals with 2 switches, a
stereo cord and plug will work. However, Carvin’s FS22 is
recommended because no rewiring will be necessary.
25. AC POWER & FUSE The detachable AC POWER
CORD supplied is designed to operate with one type of voltage (the European 230V export model uses a CEE-7 plug
cord set). Check the rear power cord label for the proper
voltage. Make sure the cord is securely inserted into the
back of the unit. Plug the cord into a grounded “3” prong”
power source. No attempt should ever be made to defeat
or use the amp without the ground connected.
The FUSE is located within the AC power cord receptacle.
If the amp does not turn on, unplug the amp and check the
fuse, AC power connection, your speaker connection and all
tubes. Replace the fuse only with the same size and type.
HELP SECTION
a) FEEDBACK FROM THE LEAD CHANNEL
The X-100B may feedback when the VOLUME, DRIVE,
TREBLE and PRESENCE are turned all the way up. Like
other high-gain tube amps, this is normal. To help control
feedback and noise, reduce the DRIVE control, or move the
guitar to the side or away from the speakers. Sometimes
replacing V1 or V2 (12AX7A) can help reduce feedback.
b) TUBE REPLACEMENT GUIDE
It is not uncommon for tubes to malfunction during shipping. If your amp is not working properly, please call or
refer to the following replacement guide.
1) The 12AX7A preamp tubes are the smaller of the two
kinds of tubes, and are located in the following order on
your chassis:V1, V2, V3. To start with, V1 is located
closest to the guitar input, near the output transformer.
Replace the tubes if your amp does not work or sounds
muddy or dull. V1 is the input tube and affects all
channels. V2 is the main overdrive tube. Replace V3 if
no output is heard when putting a signal through the
effect return.
2) If there is no output after replacing the preamp tubes,
or if the fuse blows, try replacing output tubes. The
amp should be rebaised after replacing the output tubes.
3) If the amp stops working and the fuse is blown, turn
the amp off and try replacing the power tubes. One of
these tubes may have a short.
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