DV Mark Combo head 40 User manual

SAFETY INSTRUCTIONS
1. IMPORTANT SAFETY INSTRUCTIONS
1) Read these instructions;
2) Keep these instructions;
3) Heed all warnings;
4) Follow all instructions;
5) Do not use this apparatus near water;
6) Clean only with a dry cloth;
7) Install in accordance with the manufacturer’s instructions;
8) Do not install near any heat sources such as radiators, heat registers, stoves, or other
apparatuses (including amplifiers) that produce heat;
9) Protect the power cord from being walked on or pinched, particularly at plugs, convenience
receptacles, and the point where they exit from the apparatus;
10) Only use attachments/accessories specified by the manufacturer;
11) Unplug this apparatus during lightning storms or when unused for long periods of time;
12) Refer all servicing to qualified service personnel. Servicing is required when the apparatus
has been damaged in any way, such as when the power-supply cord or plug is damaged,
liquid has been spilled or objects have fallen into the apparatus, or when the apparatus has
been exposed to rain or moisture, does not operate normally, or has been dropped;
13) “Warning: to reduce the risk of fire or electric shock, do not expose this apparatus to rain
or moisture; and objects filled with liquids, such as vases, should not be placed on this
apparatus”;
14) The socket outlet shall be installed near the equipment and shall be easily accessible;
15) The power cord must be unplugged prior to servicing
MORE INFORMATION
For warranty and service information, please contact your local DV Mark distributor (contact information available at www.dvmark.it). For more technical information, please visit us at www.dvmark.it and
fill out the form on the Contact Us page. We hope you enjoy your amplifier and use it to make great music!
“The Lightning Flash with arrowhead symbol within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product enclosure that may be of
sufficient magnitude to constitute a risk of shock to persons.”
“The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the
product.”
1. PRÉCAUTIONS D’EMPLOI
1) Lire ces instructions;
2) Conserver ces instructions;
3) Suivre tous les conseils d’utilisations;
4) Suivre toutes les instructions;
5) Ne pas utiliser cet appareil au bord de l’eau;
6) Nettoyer uniquement avec un chiffon humide;
7) Ne pas bloquer le système de ventilation. Installer conformément aux instructions du fabricant;
8) Ne pas installer l’appareil près d’une source de chaleur tel qu’un radiateur, un fourneau, ou bien
un autre appareil qui produit de la chaleur;
9) Protéger le cordon d’alimentation afin qu’il ne soit pas piétiné ou écrasé tout particulièrement au
niveau des fiches, des prises de courant femelles, et des parties qui sortent de l’appareil;
10) Utiliser uniquement les accessoires recommendés par le fabricant;
11) Ne pas branché l’appareil en cas d’orage accompagné d’éclairs. Le débrancher en cas de non
utilisation prolongée;
12) S’adresser à un service assistance agréé si l’appareil a subi des dommages, si le cordon
d’alimentation ou la fiche a été endommagé, si un liquide a été renversé sur l’appareil ou bien si
un object est tombé dans l’appareil, si ce dernier a été exposé à la pluie ou à l’humidité, s’il ne
fonctionne pas correctement ou s’il est tombé;
13) “Avertissant: pour réduire le risque du feu ou de décharge électrique, n’exposez pas cet appareil
à la pluie ou l’humidité et les objets remplis de liquides; tels que des vases, ne devraient pas
être placés sur cet appareil”;
14) La prise de courant doit être installée près de l’appareil et doit être facilement accessible;
15) La fiche principale doit être débranchée avant toute opération d’entretien
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MARK VISION
A Word from Marco De Virgiliis
Thank you for choosing DV Mark!
We are very excited to have you join us for an exciting new chapter in the history of guitar amplification. In less than 10 years, we have succeeded in making
Markbass the world’s leading bass amp brand, using technology to better serve the needs of bassists: great tone, reliability, versatility/flexibility, and light weight.
Now it’s time for guitarists to have their turn!
The classic tones guitarists have come to know and love over the last few decades are worthy of great respect. We have designed our amps with a great
reverence for these sounds. We’re not trying to start a revolution in guitar tone… because guitarists don’t want or need that.
However—there are some important areas where the classic amplifiers can be greatly improved upon, to better suit the needs of guitarists:
The first is reliability—and we are very proud of the high quality standard that we’re able to offer thanks to our 100% Made in Italy production, state-of the-art
testing and quality control facilities, top-quality components, and innovative technology that makes it easy to monitor the condition of your amp and its tubes.
You need to be able to always trust your amp… and we understand that!
The second is flexibility. One example of this is DV Mark’s patent pending Continuous Power Control feature (included on our 40W heads and combos), which
allows you to adjust the power incrementally, setting the power at anywhere between 1 and 40W. This means you can get the tone you want at the volume you
need; so you can use the same amp for everything, from larger gigs, to smaller gigs, right down to bedroom practicing—and never sacrifice your tone!
The third is light weight. Many of you have seen your bass players easily loading in and out of gigs with their lightweight Markbass gear, while you struggle
with a heavy 2x12 combo or 4x12 cabinet. It’s time you enjoyed the same benefits of lightweight gear! Especially if you play a lot, the weight of your gear is a
real factor. Once you learn that DV Mark allows you to get killer tone at a fraction of the weight… there’s no going back.
We hope you will enjoy your new guitar amp, and we invite you to contact us any time with your comments and questions, at [e-mail].
Thanks again, and good music!
Marco De Virgiliis
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FRONT PANEL
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1) INPUT CH1 (Hi Z 1MΩ)
Connect your guitar to this input using a standard ¼” shielded instrument cable. This input is suitable for instruments that have normal-output
pickups and passive electronics.
2) INPUT CH2 (Low Z -6dB)
This input is padded by 6 dB to compensate for higher output sources, and is suitable for use with guitars that have high-output pickups or
active electronics.
3) NORMAL/BRIGHT
This switch boosts upper-treble frequencies, adding brightness to your sound. This is often used to compensate for the loss of brightness that
occurs when the amp is being used at low volumes.
4) GAIN (CLEAN CHANNEL)
This knob sets the gain level, and is the preamp’s most powerful control. It not only determines the amount of drive or saturation (for getting
clean, crunch or overdriven sounds, or anywhere in between), but also plays an important role in tone shaping.
5) MASTER (CH1)
This control is the master feed from the end of the preamp channel to the tube power stage. It allows you to obtain a wide range of sounds/
colours in relation to the gain setting—for example, very low gain sounds at high volumes or high gain sounds at low volumes.
6) SWITCH CH1/CH2
This channel selector switches between the Clean (CH1) and Drive (CH2) channels. Channel-switching can also be controlled by the “Clean/
Drive” footswitch that can be plugged into the combo’s top panel (19): the channel selector switch is disabled when a footswitch is connected
to the footswitch jack.
7) DRIVE
Controls how much preamp overdrive and saturation is applied in Drive mode (CH2), ranging from crunch to overdrive sounds.

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8) MASTER (CH2)
This control is the master feed from the end of the preamp channel to the tube power stage. It allows you to obtain a wide range of sounds/
colours in relation to the gain setting—for example, very low gain sounds at high volumes or high gain sounds at low volumes.
9) BASS
This knob controls the amount of low frequencies in your sound. When you’re starting to explore sounds on the amp, avoid boosting the lows
too much as this can reduce your attack and muddy your sound—especially as you turn up your gain.
10) MIDDLE
The Middle control regulates the midrange frequencies and is an important part of your tone shaping. The frequency range it boosts and cuts
has a big effect on the character of your sound. For a more scoopy tone, lower the mids. Turn the knob up for more focused attack and better
pitch definition.
11) HIGH
The High knob controls how much of the preamp’s high frequencies are blended into the signal. It can produce unwanted noise (hiss) or pickup
feedback if really cranked, so it’s best to avoid extreme settings.
12) RIVERBERO
Level control for the onboard Accutronics® spring reverb.
13) PRESENCE
The Presence knob controls high frequencies, above those controlled by the High knob. It’s an effective and useful part of the amp’s tone
controls. Turn the Presence up for crisp, sparkling clean sounds, crunchy rhythm sounds and aggressive riffs; lower it for darker, rounder
sounds and focused single-note lead tones.
14) SOLO
This control can be activated by footswitch. It boosts your signal level by 6 dB to step up your volume for lead playing in live performance.

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FRONT PANEL
15) CONTINUOUS POWER CONTROL (CPC)
This patent pending feature allows you to change the actual power of the amp, from full power 40W (class A/B) gradually down to 1W (class
A) in Pentode mode—or 15W (class A/B) to 0.5W (class A) in Triode mode. This allows users to get the tone they want at any volume for any
musical situation.
16) STANDBY
Before powering on, make sure this switch is in standby position. When you turn on the power, the microcontroller waits for the tubes to heat
up before turning on the plate voltage. The “power on” LED will flash for 30 seconds before the amp is ready. When the LED stops blinking, flip
the Standby switch to the ON position. Between sets or whenever you’re on a break from playing, put the amp in standby position (down).
17) POWER
This switch delivers AC power to the amp. Make sure the unit is grounded; all three terminals of the AC power plug must be connected to avoid
any injury to the user or damage to the unit. DV Mark amps and combos are manufactured to be used in the country where they have been
sold, and are factory preset to that country’s voltage. So make sure you’re sending the correct voltage to your amp before connect it to AC
power. Follow the procedure described in the STANDBY section above (16) before powering up your amp.
18) PRE OUT – AMP IN
The combo features a series preamp output and power amp input which can be used for connecting with outboard effect processors or pedals.
This loop is wired between the preamp and the power amp, and its level is optimized to match well with most quality effect processing devices.
Simply connect the Pre Out jack to your processor’s input, and connect the output of your processor to the Amp In jack. You can also use the
Pre Out to send to another power amp, recording device, DI, etc.
19) FSW
1/4” STEREO jack for connecting a DUAL footswitch to switch between Clean and Drive channels and activate the solo boost.

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FRONT PANEL
1 2 6 14
18 19
7 98 10 11 12 13 15 16 17
3
4 5

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20) SPEAKER OUTS
One 4 ohm, one 8 ohm and one 16 ohm jack are provided for speaker cabinet connections. Verify the impedance of your speaker
cabinet to make sure you connect it to the correct output.
21) TUBE MODE
This switch allows you to switch between the two tube operating modes, Pentode and Triode. Each mode has different power
outputs:
Pentode: 1 ÷ 40W (from 1W class A to 40W class AB)
Triode: 0,5 ÷ 15W (from 0,5W class A to 15W class AB)
22) BIAS switch (low/high)
The Combo Head 40 can operate in either Low Bias mode or High Bias mode. When this button is pressed in the power tubes work
in High Bias mode; when the button is depressed they work in Low Bias mode. In Low Bias mode, the tubes use less power and less
‘tube life’ is taken out of them. High Bias mode gives top quality and power, and higher-fidelity sound—but the power consumption
and dissipation of the tubes increases. In either mode, unlike other tube amplifiers, the Combo Head 40 is able to greatly prolong the
life of its tubes by keeping them optimally biased at all times.
23) SERVICE
The optional ATCS (Advanced Tube Control System) interface allows users or service technicians to connect this port to a computer—
and with dedicated software—collect technical data and tube parameters from the amp.
24) AC Power Socket
Make sure the unit is grounded; all three terminals of the AC power cord must be connected to avoid any injury to the user or damage
to the unit. DV Mark amps and combos are manufactured to be used in the country where they have been sold, and are factory preset
to that country’s voltage. So make sure you’re sending the correct voltage to your amp before you connect it to AC power.
REAR PANEL

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REAR PANEL
2021
22
2324

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TECHNICAL SPECS
Power Output (CPC):
. . . . . . . . . Pentode: 1 ÷ 40W
. . . . . . . . . Triode : 0,5 ÷ 15W
Preamp Tubes: 2x ECC83
Power Tubes: 2x EL34 1x ECC83
Channels: TWO
Controls: Gain - Master - Presence - Solo - Continuous Power Control (CPC)
EQ Controls: Low - Mid - High (passive)
Speaker Outputs:
. . . . . . . . . One 4 ohm
. . . . . . . . . One 8 ohm
. . . . . . . . . One 16 ohm
Other Features:
. . . . . . . . . input 1 (Hi Z 1MΩ), input 2 (Low Z - 6dB)
. . . . . . . . . Service ATCS intervace (optional)
POWER REQUIREMENT:
(Voltage is factory preset according to region of sale)
100V/120V; 230V; 240V
50/60Hz
DV Mark amps/combos are manufactured to be sold and used in the country of purchase, and they are factory preset to that country’s voltage.
Due to homologation issues, the voltage may not be changed.

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TECHNICAL SPECS
DV 40 112 COMBO
Speaker size: 1x12” B&C Neodymium DV Mark Custom
Speaker power handling: 150W (AES standard)
impedance 8 ohms
Dimensions:
628 x 465 x 272 mm / 24.72” x 18.31” x 10.71”
Weight: 15,9 kg / 35.05 lbs
DV 40 212 COMBO
Speaker size: 2x12” B&C Neodymium DV Mark Custom
Speaker power handling: 300W (AES standard)
impedance 4 ohms
Dimensions:
684 x 465 x 272 mm / 26.93” x 18.31”x 10.71”
Weight: 17 kg / 37.48 lbs

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BLOCK DIAGRAM
Amp In
Pre Out
HiZ
Gain
Passive
tone
control
Low
Mid
High
Power Supply
Standby
On/O
Solo
fuse
mains
CPC
½ ECC83
½ ECC83
Master 1
Microcontroller
Pentode/Triode
Bias
Service
Power amp
8 ohm
EL34
EL34
ECC83
Output
transformer
Presence
4 ohm
16 ohm
LowZ
½ ECC83
HPF
½ ECC83
Master 2
Bright
Rev
+
Reverb
CH1/CH2
CH1/CH2
CH1/CH2

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LIMITED WARRANTY

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WARRANTY CARD

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JULY 2010 DV MARK PRODUCT LINE
Heads
Bad Boy 120
120W, 3-channel, all-tube rock head
Little 40
40W, 1-channel all-tube head with CPC* and 6L6 or EL34
power tubes
Galileo 15
15W, 1-channel all-tube head
Combos
DV40 112
2-channel, 1x12”, 40W all-tube combo with CPC*, boost
and Accutronics reverb
DV40 212
2-channel, 2x12”, 40W all-tube combo with CPC*, boost
and Accutronics reverb
Pedals
Guitar Tube Marker
Distortion pedal for guitar
DVM Compressore
Tube compressor pedal for guitar
*CPC = Continuous Power Control
Cabinets
C 112 Small
1x12”, super compact and lightweight; 7.6 kg / 16.7 lbs
150W, 8 ohms
C 112 Standard
1x12”, horizontal; 8.8 kg / 19.4 lbs; 150W, 8 ohms
C 212 Standard
2x12”, horizontal; 10.3 kg / 22.7 lbs
300W, 4 ohms mono / 2x8 ohms stereo
C 212 V
2x12”, vertical slant-top design; 13.5 kg / 29.7 lbs,
300W, 4 ohms
C 412 Standard
4x12”, standard slant-top design; 21.4 kg / 47.1 lbs,
600W, 8 ohms mono / 2x16 ohms stereo
C 412 Vintage
4x12”, at front vintage design, 19.7 kg / 43.4 lbs 600W,
8 ohms mono / 2x16 ohms stereo

srl
Italy - 66020 San Giovanni Teatino CH - Via Po, 52
Tel: [phone] - Fax: [phone] - www.dvmark.it - [email protected]
www.markaudio.it
www.markbass.it
TM
www.momark.it
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Product specications are subject to change without notice