Ladner G-1 User manual

MODEL G-1
Owner’s Manual
… Respect for the past with insight to the future

Model G-1 Guitar Amplifier Owner’s Manual
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TABLE OF CONTENTS
INTRODUCTION..........................................................3
FRONT PANEL.............................................................4
REAR PANEL................................................................7
FOOTSWITCH CONNECTION DETAILS...............8
SPECS.............................................................................9
TUBE PLACEMENT..................................................10
WARRANTY................................................................11
SAFETY INFORMATION.........................................12
Ladner Engineering Group LLC
124 Main Street
Post Office Box 3971
Bay Saint Louis, Mississippi 39520
USA
www.ladnerengineering.com

Model G-1 Guitar Amplifier Owner’s Manual
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INTRODUCTION
Generations of amplifiers have ushered sounds that are
unmistakable and powerful. From early amplifiers of
Fender and Marshall to the modern amplifiers of
Mesa/Boogie and Two Rock, there has been a lot of
magic trapped within the tubes. Ladner Engineering has
developed a new generation of vacuum tube amplifiers
that hopes to cement its name within the greats of the
past. First off, we thank you for purchasing the G-1
amplifier the first Ladner Engineering Group design. The
G-1 was developed to be an amplifier of versatility and
soul. From the fat powerful clean sound to the singing
overdrive, the G-1 was designed with the musician in
mind. Creating a palette of tones that can be used to
maximize the potential of the player and his sound.
Players also demand reliability and that was not over
looked. With all our amplifiers we ensure a hundred
percent quality within our hand built amplifiers. Built
upon a ceramic strip substrate, we kick quality up a
notch, no circuit boards, turret boards, no boards at all,
leaving out any potential malfunction from the sub-
structure. The heart and soul comes primarily from our
custom designed Mercury Magnetic transformers, in
response to our fine tuned pre-amp section to deliver
nothing less than pure tonal performance. Each knob
has sensitive control in their respective position, bringing
forth a wide spectrum of sounds to choose from. Enough
of this stuff, go out and play your G-1 for a thousand
hours a day!
Andrew & D.C. Ladner
Ladner Engineering Group

Model G-1 Guitar Amplifier Owner’s Manual
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FRONT PANEL
1 - INPUT - ¼” jack that delivers the signal from
the guitar to the first stage of gain in the
amplifier.
2 - GAIN - Controls the level of the first gain
stage, and is very important down the line with
response to the tone stack and overdrive
circuits. With response to the overdrive it acts
as the first of the cascading gain stages.
3 - BRIGHT –Delivers more brilliance to the tone
circuit and increases the treble response in the
preamp. This switch can help to make darker
instruments (such as those with humbuckers) to cut
through and improve attack.
4 - ALT TONE –This is a unique switch that
reconfigures the tone stack to deliver a flatter
response (like on many early tube hi-fi amplifiers).
Most amplifiers have scoop within the mid
range response of the amplifier to counter the
hump of mid frequency response within the
speaker. The normal position will make the

Model G-1 Guitar Amplifier Owner’s Manual
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amplifier respond in the traditional fashion. The
alternate position brings a flatter response,
which can benefit certain instruments (such as
lap-steel, pedal steel, electric violin, etc…). The
alternate tone stack also works great for the
jazz guitarist, helping to show the true tone of a
classic hollow body.
5 –BASS –adjusts the response of bass
frequencies within the tone stack. This is a very
dominant control and can bring the response
of the amplifier from “woofy” to “boomy” and
everything in between. All the knobs on the G1
are powerful and slight adjustments of one can
radically change the response of the others.
6 - MIDS –This very powerful knob in guitar
amplifiers can bring a sound from harsh to
beautiful just by the turn of a knob. Changing
the amount of mid range, this knob has a
significant control over the overall tone.
7 - TREBLE –Controls the amount of highs, and is
as equally as important as the mid. The treble is
very important and powerful knob in respect to
the overall tone. The Treble knob can bring the
amplifier from dark singing full on mid range
punch, to bright crisp attack.
8 –LOW DETAIL –Details, or kinda-tightens the
low-end response of the amplifier, it does not
cut or boost any bass. This enhancement can

Model G-1 Guitar Amplifier Owner’s Manual
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tighten and produce a more detailed bottom
sound if desired.
9 –OD LEVEL –Sets the output level of the
overdrive channel. It provides a way to
balance the overdrive signal to the clean signal
for a balanced sound or even a boost or cut
within the overdrive function.
10 –MID SHIFT–This control shifts the mid-scoop
point from around 400 Hz to 300 Hz. Once
again, it does not cut or boost any mids.
11 - OVERDRIVE –Adjust the amount of
overdrive or crunch. Switched by either
footswitch or front panel toggle switch (with
footswitch unplugged). The adjustment of the first-
stage GAIN knob is crucial to the response of
the OVERDRIVE knob, Another way to describe
this knob is your “overdrive sound” or how
much gain you can get out of the amplifier
adding dirty tones to the clean in response to
the position of the gain knob. The gain and
overdrive represent a cascading gain stage in
a fashion that delivers smooth singing gain.
12 –CLEAN / OD –Switches between Clean
and Overdrive channels. NOTE: This switch is
disabled when the footswitch is plugged into
the rear of the amp. The footswitch takes
precedence when connected.

Model G-1 Guitar Amplifier Owner’s Manual
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13 –MASTER –Controls the over all volume and
output of the amplifier.
12 –PLAY/STANDBY/OFF –An all-inclusive
function control - go from Off/Standby/On,
with one switch.
Rear Panel
1 –FUSE- 3Amp 250V AGC fuse.
2 - AC POWER –an IEC standard removable
power cable. This unit is shipped for US
domestic markets with a nominal line voltage of
117VAC 60Hz.
3 - PRESENCE - Brings in highs through the
Output section of the amplifier. Turing the
PRESENCE all the way counter-clockwise
produces a dark, beefy tone. The knob in the
middle is “design center” where the amp was
designed and most effective to the over all
tone. Turning the knob more clockwise

Model G-1 Guitar Amplifier Owner’s Manual
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produces more high-end sparkle. The Presence
control is very functional and powerful to the
overall tone and has more range than most
conventional amplifiers.
4 - FOOTSWITCH –Connection for the channel
selection footswitch, a standard TRS or Tip Ring
Sleeve cable is required. NOTE: The front panel
selector switch is disabled when the footswitch
is plugged into this jack. A faulty footswitch or
flaky cable can cause the amp to default to the
OverDrive Channel!!!
FOOTSWITCH CONNECTION DETAILS
5 –SLAVE LEVEL - A tap off the output to send
an unbalanced signal to a power amplifier or
recording console. The slave level controls how
much signal is sent to the Slave Output jack.
The slave level can deliver signals above line
level. NOTE: A proper load must be connected
to the amplifier (i.e. Speaker cab or load box)
or you will (possibly, pretty good chance) blow
the amp up … which is no fun.

Model G-1 Guitar Amplifier Owner’s Manual
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6 –SLAVE OUTPUT - ¼” jack to deliver signal to a
console or to facilitate “re-amping”.
7 –SPEAKER OUT - ¼” jack to deliver signal to a
speaker cabinet.
8 –Zout - Impedance selector 4,8,16 ohm –
Avoid changing this selector with the unit in the
“PLAY” mode.
SPECS
OUTPUT POWER >100 Watts –Clean
OUTPUT IMPEDENCE Selectable 4, 8, 16 
INPUT 1 M
CHANNEL SELECTION Front Panel/Footswitch
EQUALIZATION Bass, Mids, Treble Presence
VOICING Alt Tone, Mid-Shift, Low Detail

Model G-1 Guitar Amplifier Owner’s Manual
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TUBE PLACEMENT
V1-V4: 12AX7
V5-V8: 6L6
V1: Input stage (Mullard 12AX7A)
V2: Tone
V3: Overdrive (12AX7LPS)
V4: Phase Inverter (12AX7LPS)
V5-V8: Output (6L6 WXT+)
CAUTION: Tubes are HOT when in use, and for a
while after the unit has been turned off, use
extreme caution when changing.

Model G-1 Guitar Amplifier Owner’s Manual
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WARRANTY
All Ladner amplifiers sold by authorized Ladner dealers are
warranted by Ladner Engineering Group to be free from defects in
material or workmanship under normal use and service for a period
of five (5) years* on parts and three (3) years* on labor from
the original date of purchase. Speaker cabinets are covered for a
period of three (3) years* on parts and labor from the original
date of purchase.
Any products found to be defective within the applicable period will
be repaired or replaced at the option of the Ladner Engineering
Group, without any charge provided that; (1) the product was not
misused, abused, improperly maintained, or repaired by any person
not authorized by Ladner Engineering Group; (2) its failure resulted
from a defect in material or workmanship and was not damaged due
to use other than its intended use; (3) the product was not used
under abnormal, excessive, or unusual operating conditions and (4)
the product is promptly delivered prepaid to the seller at the place
of purchase or to an authorized Ladner Engineering Group warranty
service center together with proof of purchase within the applicable
period.
There are no warranties, expressed or implied, other than those
expressed herein. Further, there is no warranty of merchantability or
fitness for a particular purpose. This warranty does not cover units
used for loan or rental.
Limitation of Liability: the above warranty represents purchaser’s
exclusive remedy and Ladner Engineering Group, LLC shall not be
liable for any special, incidental, or consequential damages relating
to the product sold.
Some states do not allow limitations on the duration of implied
warranty or the exclusion may not apply to some purchasers. This
warranty gives purchasers specific legal rights and purchasers may
also have other rights that vary from state to state.
* Exceptions:
Speakers
1 Year
Sound Reinforcement Products
3 years
Tubes, Cables
90 days
Vinyl Covers/Bags/Accessories
No Warranty

Model G-1 Guitar Amplifier Owner’s Manual
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ALWAYS TURN POWER OFF
WHEN CHANGING OR
REPLACING TUBES
SAFETY INFORMATION
Do not expose this amplifier to moisture or water
(i.e. avoid dropping into swimming pools, most
lakes, water ways or use during times of
excessive storm surge)** or extreme heat.
Turnoff and unplug before any tube change.
Only use a 3 amp, AGC fuse. Remember ONLY!!!!
Keep the back of the amplifier away from curtains
or other flammable materials.
Remove speaker (head version) and power cable
before moving to avoid damage.
Only clean with a soft towel and mild cleaner.
Remember ONLY!!!!
Unlike Trix, these amplifiers are NOT for kids, so
keep it away from them.
Unplug during lightning storms, hurricanes,
tsunamis or the like.
** … unless it’s a competitors amplifier, of course.

Model G-1 Guitar Amplifier Owner’s Manual
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This amplifier produces EXTREME SOUND
VOLUMES and can cause PERMANET
HEARING DAMAGE, handle with care.
THIS MEANS YOU!
Common sense is a
valuable tool, so use it.
Always have this Amplifier serviced by a
QUALIFIED SERVICE
PROFESSIONAL
ONLY!

Model G-1 Guitar Amplifier Owner’s Manual
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Thank you for your purchase, and
welcome to the Ladner Engineering
family. We wish you many years of
great tonal bliss with your hand-
built G-1 amplifier.
A toast to you and the future,
Andrew and D.C Ladner