Thank you for purchasing a Dr Z Amp. This amplifier was designed to give you years of playing and sonic
enjoyment. We are proud to forge ahead and create new tube amplifier sounds with a nod to the classics of
the past. Whether you are a touring professional, weekend warrior, or basement jammer; we take your
sound and need for a reliable amplifier seriously.
Intro
The Maz 18NR/Maz 38NR series of amplifiers are designed to give you a portable and familiar package.
These amps offer the classic pla�orm of a 12AX7 front end coupled with an EL84 power sec�on, tube reverb,
and tube rec�fica�on. You’ll find this series has an unmistakable blend of classic American and English
tones. They can deliver full bodied clean tones and natural overdrive all while le�ng you dial in the “Chime.”
The Maz 18NR is great for ge�ng classic breaking up tube tone at lower volumes. The Maz 38NR gives you
more clean headroom and low end push. Both give you great flexibility to shape your guitar sound.
General Informa�on
While we hope you get years of worry free use out of your Dr Z Amp there are some basic maintenance
procedures to follow.
Changing Output Tubes:
If your amp starts sounding a bit dull or lacks punch it’s usually �me for a new set
of output tubes. Changing the EL84 output tubes on your Maz 18NR/38NR is easy. These amps are cathode
(self) biased so there is no need to rebias when changing tubes. Always use a matched pair (Maz 18NR) or
matched quad (Maz 38NR) of EL84’s. Always make sure the power is off and AC cord is unplugged when
changing tubes. Always use cau�on not to burn your fingers as tubes become very hot quickly. With moder
-
ate usage output tubes should last 6 months to a year.
Changing Pre Amp Tubes:
When pre amp tubes fail it usually results in a sta�c type noise or a ringing micro
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phonic type sound. Pre amp tubes are easily replaced. We recommend replacing them with the same
brand/type that came in the amp. We have hand selected these tubes to deliver op�mal voicing.
Changing Rec�fier Tube:
Signs your rec�fier tube (5AR4/GZ34) needs changed are fairly obvious. A bad
rec�fier will usually result in a fuse blowing. Power off, unplug the AC cord and replace the blown fuse before
replacing the rec�fier tube. Use cau�on as these tubes get very hot!
Care and Maintenance
Power Output:
18 Watts
Output Tubes:
2 - EL84
Preamp Tubes:
3 - 12AX7
Rectifier:
1 - 5AR4
Controls:
Volume, Treble, Mid, Bass, Cut, Master
Other:
4, 8, 16 Ohm Speaker Outs
Effects Loop
EQ Bypass (variable boost footswitch)
Dimensions
Head:
19” W, 9 3/4” H, 9 1/2” D; 32 lbs.
& Weight:
1×12 Studio Combo:
19 ¼” W, 19 ½” H, 10 ½ ” D; 45 lbs.
1×12 Standard Combo:
23” W, 20 1/8” H, 10” D; 60 lbs.
2×10 Standard Combo:
23” W, 20 1/8” H, 10” D; 66 lbs.
2×12 Combo:
27 1/2” W, 22 1/8“ H, 10” D; 77 lbs.
Power Output:
38 Watts
Output Tubes:
4 - EL84
Preamp Tubes:
3 - 12AX7
Rectifier:
1 - 5AR4
Controls:
Volume, Treble, Mid, Bass, Cut, Master
Other:
4, 8, 16 Ohm Speaker Outs
Effects Loop
EQ Bypass (variable boost footswitch)
Dimensions
Head:
19” W, 9 3/4” H, 9 1/2” D; 35 lbs.
& Weight:
1×12 Studio Combo:
19 ¼” W, 19 ½” H, 10 ½ ” D; 48 lbs.
1×12 Standard Combo:
23” W, 20 1/8” H, 10” D; 67 lbs.
2×10 Standard Combo:
23” W, 20 1/8” H, 10” D; 69 lbs.
2×12 Combo:
27 1/2” W, 22 1/8“ H, 10” D; 80 lbs.
MAZ 18 NR Specifications:
MAZ 38 NR Specifications:
