8. This is the MASTER volume for the CLEAN channel. Use this knob in conjunction with the GAIN
knob to set up your sound and overall level.
TIP: Since the MJOLNIR is a 15 Watt tube amplifier, it does not possess the headroom of the more
familiar 50 or 100 Watt Metal Amps. In those Amps, the power amp will simply make the preamp sound
louder without adding too much power amp distortion to the sound. Power amp distortion will sound more
compressed and wobbly. Your sound can become less defined with a less pronounced attack. Listen to
what happens to your sound at higher volumes and stop increasing the volume when the effect becomes
undesirable. With this “low wattage” type of amplifier, the power amp distortion plays a much more
important role in the sculpting of your sound. You can use this to your advantage, but if you are not aware
of it, it can easily result in undesirable muddiness.
9. Presence control of the CLEAN channel: This is another form of High End (or Treble) control.
10. PUSH switch: This switch only applies to the CLEAN channel. When you PUSH the channel (in the
UP position), it goes into overdrive and becomes the perfect crunch in between the CLEAN and
DISTORTION channel. In conjunction with the BOOST switch this offers you a wide variety of different
gain settings.
11. Power indicator: shows you the amp is ON.
12. BOOST switch: This switch works for both channels. In the UP position it adds extra gain to the
preamp.
TIP: Since the DISTORTION channel already has a lot of gain, the effect of the BOOST switch is more
noticeable when being used in the CLEAN channel or in the pushed CLEAN channel.
13. This is the GAIN control for the DISTORTION channel. Anything up to 12 o’clock is a high gain
chunk sound and everything after is brutal high gain madness. This is also dependent on your pickups.
Pickups with higher outputs will push the tubes more and give you more drive. Single Coil pickups usually
have less output than Humbuckers. Usually these types of high gain sounds are being used with
humbucking (dual coil) pickups. It also depends on the state of the BOOST switch. All these factors
influence how much gain will be generated in the preamp section of the MJOLNIR, but rest assured, this
amp has more gain than you will ever need!
14. Bass control of the DISTORTION channel: at 12 o’clock it is neutral. Turning it clockwise will boost
the bass and counterclockwise will cut, or attenuate, the bass frequencies.
TIP: We all know its nice to have a fat sound and make the speaker move the pants around your legs, but
remember: You also have a bass player in the band and he has a job to do, so give him some room
(frequencies) to do his job. Together you will sound like an unstoppable army if you play tightly and get
out of each others way (again… talking about frequencies). In metal, the bass player very often doubles
the guitar part, so if you make sure you are playing in perfect unison, you don’t need a very “bassy” sound
to move mountains, you just need to be tight with the bass player.
15. Middle control of the DISTORTION channel: at 12 o’clock it is neutral. Turning it clockwise will
boost the mids and counterclockwise will cut, or attenuate, the mid frequencies.
TIP: Most of what defines a guitar sound happens here. The MIDS are the most important frequencies for
the guitar player. Just look at our typical 1X12 speaker. They can’t do very low bass and they most
certainly cannot produce a lot of high frequencies. So try to learn what the MIDS sound like. See how t hey
add warmth when you increase this knob and how they can dig a hole in your sound if you attenuate.
Speaking of a hole in the MIDS… since the DISTORTION channel also has a MID CUT switch, try to learn
how the MID CUT switch and the MIDDLE control work with each other. Does it make sense to CUT the
mids with the switch, but have the MIDDLE control at maximum? You find out!
16. Treble control of the DISTORTION channel: at 12 o’clock it is neutral. Turning it clockwise will boost
the treble and counterclockwise will cut, or attenuate, the treble frequencies.
TIP: Play with this control for clarity and bite. Turning it down a bit could help you tame piercing single coil
sounds.
17. This is the MASTER volume for the DISTORTION channel. Use this knob in conjunction with the
GAIN knob to set up your sound and overall level.
TIP: Since the MJOLNIR is a 15 Watt tube amplifier, it does not possess the headroom of the more
familiar 50 or 100 Watt Metal Amps. In those Amps, the power amp will simply make the preamp sound
louder without adding too much power amp distortion to the sound. Power amp distortion will sound more
87
22. AC input: use the included power cord for connection. Do not damage the grounding pin of the power
plug, otherwise it may cause severe electric shock.
23. FX Loop SEND: Here you can connect the preamp output of the MJOLNIR to your effects pedals or
rack effects. The output uses a 1/4“unbalanced connector. The maximum level going to your effects is
+4dBu
TIP: As a rough guide to effects pedal routing, remember that time based effects like delays and reverbs
should go behind the distortion and therefore into the FX Loop. Some modulation effects can also go
here, but that depends on your taste. A phaser in front of your distortion will sound different than a phaser
behind it. An EQ (like a graphic EQ pedal for example) is more effective in the FX Loop because it will
sculpt the sound that the preamp has created. Noise Gates should also be used here since they should
control the noise being created in the preamp.
22 23 24 25 26 27 28 29 30
31
GUIDED TOUR - REAR PANEL
compressed and wobbly. Your sound can become less defined with a less pronounced attack. Listen to
what happens to your sound at higher volumes and stop increasing the volume when the effect becomes
undesirable. With this “low wattage” type of amplifier, the power amp distortion plays a much more
important role in the sculpting of your sound. You can use this to your advantage, but if you are not aware
of it, it can easily result in undesirable muddiness.
In the CLEAN channel it is much easier to hear when the power amp distortion sets in because you will
hear a form of overdrive and compression, but with all the gain of the DISTORTION channel, it might be
harder to become aware of the point where you are pushing the amp too much. Try to listen to the spot
when your sound becomes less reactive and the attack undefined. At higher master volume settings your
sound might get muddy and less “on the dot”. You might want that, depending on the style of music you
play. Just use your ears!
18. Presence control of the DISTORTION channel: This is another form of High End (or Treble) control.
19. MID CUT Switch: In the DOWN position there is no effect and in the UP position, there will be a
noticeable attenuation of the MID frequencies in the 400-500 Hz range. This is where the magic for
modern rock and metal sounds happens.
TIP: By reducing the warm sounds of the lower mid frequencies, the bass and high kids have more room
to come out. The sound will feel a bit more cold, but also much more powerful and tight. If you are
shooting for more classic metal sounds (think 80s metal), you actually don’t need a lot of bass, but rather
a mid boost, so keep your hands of the MID CUT switch and play with the BASS and MIDDLE control to
achieve the sound you are looking for. For creamy lead sounds, adding a lot of kids is very important, so
don’t be afraid to set the MIDDLE to maximum and take the BASS down a bit. Now add some nice delay
(like the Joyo Analog Delay) in the FX Loop and unleash your inner shredder!
20. STANDBY switch: First, power on the amp. After plugging in the guitar you are ready to flip the
Standby switch into the ON position and you are ready to go. Always make sure you are putting the amp
back in Standby when you are unplugging your guitar or effects. This ensures that the loud sounds
caused by unplugging don’t get amplified, which can damage your speakers and your hearing. .
21. POWER switch: turns on the MJOLNIR.
