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Full Text Searchable PDF User Manual
U S E R S G U I D E
H L H S E R I E S
1 0 0
A M P L I F I E R H E A D
Your 3RD POWER Amplifier is a professional musical instrument amplifier. The information
contained herein is current at the time of publication. However, specifications are subject to
change without prior notice.
PRECAUTIONS & WARNINGS
READ THESE INSTRUCTIONS.
KEEP THESE INSTRUCTIONS.
HEED ALL WARNINGS.
FOLLOW ALL INSTRUCTIONS.
YOUR AMPLIFIER IS LOUD!
EXPOSURE TO HIGH SOUND VOLUMES MAY CAUSE PERMANENT HEARING DAMAGE !
Practice “safe listening.”
No user serviceable parts inside. Refer service to qualified personnel. Always unplug AC
power before removing chassis.
IF YOU INTEND ON OPERATING THIS EQUIPMENT OUTSIDE OF THE USA: Always insure
that unit is wired for proper voltage. Make certain all connections and grounding con-
forms with local standards. Make certain that you have obtained authorization to operate
prior to connecting to power supply.
WARNING: Vacuum tube amplifiers generate heat. To insure proper ventilation always
make certain there is at least four inches (100mm) of space behind the rear of the ampli-
Keep away from curtains or any flammable objects.
WARNING: Do not block any ventilation openings on the rear or top of the amplifier. Do
not impede ventilation by placing objects on top of the amplifier which extend past the
rear edge of its cabinet.
WARNING: Do not expose the amplifier to rain, moisture, dripping or splashing water. Do
not place objects filled with liquids on or nearby the amplifier.
WARNING: Always make certain proper load is connected before operating the amplifier.
Failure to do so could pose a shock hazard and may result in damage to the amplifier.
Do not expose amplifier to direct sunlight or extremely high temperatures.
Always insure that amplifier is properly grounded. Always unplug AC power cord before
changing fuse or any tubes. When replacing fuse, use only same type and rating.
Avoid direct contact with heated tubes. Keep amplifier away from children.
Be sure to connect to an AC power supply that meets the power supply specifications
listed on the rear of the unit. Remove the power plug from the AC mains socket if the unit
is to be stored for an extended period of time. If there is any danger of lightning occurring
nearby, remove the power plug from the wall socket in advance.
To avoid damaging your speakers and other music equipment, turn off the power of all
related equipment before making the connections.
Do not use excessive force in handling control buttons, switches and controls. Do not
use solvents such as benzene or paint thinner to clean the unit. Wipe off the exterior with
Thank you for choosing 3RD
POWER as an integral compo-
nent of your musical journey.
Music is a thrilling blend of
tone, attitude and technique.
When the right combination
occurs, magic happens and it’s
experienced by everyone.
I’ve had the extraordinary
privilege of performing music for 30 years on stage and in the studio.
As the principal visionary of the company, every product we design re-
flects my energy, attitude and life experiences.
Each amplifier we create is designed to help you tell your musical story
- IN 3D!!!
- James Scott
MOVING FORWARD... IN 3D
• Hand-built and hand-wired in the USA
• Single Channel All-Tube design
• 100 watt, EL34 Power Amp section
• Mid Voicing Switch, Preamp Gain, Master Volume, Solo Volume,
Treble, Middle, Bass, and Presence controls
• Variable Line Output on back panel
• Series Insert/Effects Loop for external effects units
• Foot-switchable Lead Clean Boost (power amp boost)
Dimensions & Weights:
Subject to change anytime. Please measure your amp carefully if a Cus-
tom Case is being made. These measurements do not include handle
and rubber feet.
Dimensions (WxHxD): 29 x 10.75 x 8.375 in.
Weight: 41 lb.
Preparing to Operate your HD100
Make certain that all connections are made prior to operating your
HD100 including power cable, speaker cable and cabinet, instrument
cable and instrument. Make certain that all tubes are installed.
Power Switch (1)
The POWER switch, when placed in the UP position, provides AC wall
power to the amplifier.
Standby Switch (2)
The STANDBY switch, when placed in the UP position, puts the am-
plifier in ‘standby mode’ allowing the tubes to warm up. When this
switch is place in the DOWN position, the tube circuitry is fully func-
Presence Control (3)
The PRESENCE control allows you to adjust the character or ‘for-
wardness’ of your sound. Low settings create ‘darker’ tones, whereas
higher settings create a ‘brilliant’ or crisp sound.
Bass Control (4)
The BASS control allows you to adjust the depth of your lower fre-
quencies. The BASS circuitry has been optimized to provide deep, rich
low frequencies while retaining outstanding agility and note definition.
Mid Control (5)
The MID control allows you to adjust the character of the middle fre-
quency range. The MID circuitry has been optimized to deliver a wide
range of mid frequency character so your tone cuts through the mix
without sounding harsh.
Treble Control (6)
The TREBLE control allows you to adjust the character of the higher
frequency range. The TREBLE circuitry has been optimized to deliver
excellent high frequency character while retaining a smooth tempera-
Lead Volume Control (7)
The LEAD VOLUME control allows you to increase the overall output
level without changing your tone or distortion character. When made
operational via foot-switch (separately available) this control is additive
to the MASTER VOLUME control and allows you to ‘step out’ for so-
los without missing a note.
Master Volume Control (8)
The MASTER VOLUME control allows you to set the loudness of
your amplifier. The MASTER circuitry has been optimized to deliver
incredibly linear response from your amplifier. Even at low setting,
your tone is rich, wide and full of punch. Raising this control simply
increases the volume without changing the tonal character of your
Preamp Control (9)
The PREAMP control allows you to adjust the temperament and over-
all character of the distortion sound. The PREAMP circuitry has been
optimized to provide superior versatility allowing you to achieve the
superior classic rock, americana and modern metal sounds, as well as
the highly coveted ‘brown’ sound.
Mid Voicing Switch (10)
The MID VOICING switch allows you to set the tonal center and
character of the middle frequency range. In the SMOOTH position,
the tone controls deliver the exact EQ points of a classic British tube
amplifier from the late ’60’s. In the BOLD position, the tone controls
deliver an articulated middle frequency response with tighter lows pro-
viding a finished/mastered or ‘fader up’ sound quality that is ideal for
modern guitarists and soloists wether on stage or in the studio.
Input Jack (11)
The INPUT jack is where you connect the output of your guitar signal
AC Input (12)
The AC INPUT socket (TYPE IEC Grounded) is a required connec-
tion for operating your HD100 at 117V (standard USA household elec-
Mains Fuse (13)
The MAINS FUSE requires a 4 AMP fast-acting fuse. This fuse pro-
tects your amplifier from voltage peaks from your power outlet.
H.T. Fuse (14)
The H.T. FUSE requires a 1 AMP slow-blow fuse. The H.T. FUSE
usually blows if your power amp tubes are bad to protect the circuit
from being damaged.
1) Always plug your amp into a properly grounded 3 prong AC out-
2) Never plug your amp into an ungrounded outlet.
3) Never remove or break off the 3rd prong safety ground pin from
the power cord.
4) Never use a damaged or ungrounded power cord.
5) Always use the proper value and type fuse according to the rear-
16-OHM Discreet Speaker Output (15)
The 16-OHM DISCREET SPEAKER OUTPUT is provided for con-
necting your amplifier to standard 16 OHM speaker cabinets.
(2) 8-OHM Discreet Speaker Output (16)
The two (2) 8-OHM DISCREET SPEAKER OUTPUTs are provided
for connecting your amplifier to single 8-OHM speaker cabinet or for
connecting two (2) 16-OHM speaker cabinets in parallel.
(2) 4-OHM Discreet Speaker Output (17)
The two (2) 4-OHM DISCREET SPEAKER OUTPUTs are provided
for connecting your amplifier to single 4-OHM speaker cabinet or for
connecting two (2) 8-OHM speaker cabinets in parallel.
Never operate your amplifier without a connected speaker cabinet. This
will damage your tubes or transformers - or both.
Always operate your amplifier with the proper impedance output that
matches your cabinets(s).
In all cases, always use a good quality heavy gauge speaker cable (not a
shielded instrument cable) to connect your HD100 to the speaker cabi-
Preamp Out (19)/ Poweramp In (18) Jacks
The PREAMP OUT and POWERAMP IN jacks are available to insert
professional line-level effects devices. This type of effects loop is best
described as a ‘hard insert’ or ‘break’ type of loop. PREAMP OUT
connects to the input of your effects device. POWERAMP IN connects
to the output of your effects device.
When connected to a professional line-level effects device, the amplifier
breaks the connection between the preamp and poweramp. Signal levels
and mix of the DRY/WET signals are controlled by the effects device.
Take care to optimize your gain structure in order to retain a high-
quality, low-noise signal. When not connected, there is no break inter-
nal to the amplifier allowing the amplifier to operate as designed.
This type of insert effects-loop is the best type for retaining the purity
of the amplifier performance as there are no buffers or level matching
circuitry to color your sound. The trade off is acknowledged to be less
versatile in certain circumstances. However, the purity of the sound
quality is the overriding requirement.
Line Output (20) and Line Level Control (21)
The LINE OUTPUT jack and LINE LEVEL control work together to
provide a line-level signal for feeding other amplifiers or effects devices.
The signal present at this jack originates directly from the output
Foot Switch for Solo Volume (22)
The SOLO VOLUME footswitch jack activates the front-panel SOLO
VOLUME control. This provides you with the ability to ‘step out’ when
performing live making sure that every note you play is heard in the
mix. The circuitry is designed to operate with a latching-type of
Tube Layout and Requirements:
V1, V2 - JJ 12
V3 - Sovtek 12
V4 through V7 - JJ
Your HD100 comes from the factory biased for JJ
tubes. Bias ad-
justments are not intended to be user-serviceable. Attempting to adjust
the bias yourself will expose you to very dangerous high-voltage elec-
tricity that can kill you. Special test equipment and knowledge of amp
circuits and tubes are required to perform this function. DO NOT AT-
TEMPT TO DO THIS YOURSELF.
Make sure you turn your amp off when you switch tubes and be careful,
the tubes might be very hot!! Do not touch tube sockets with fingers!
Even after turning your amp off and unplugging it from the power
outlet there could be enough voltage stored in the capacitors to give
you a lethal electrical shock.
1) Do not remove the back panel.
2) Do not attempt to check or replace tubes yourself. Refer to an
authorized service center.
3) Never touch the tubes while the amplifier is turned on or has re-
cently been turned ON. You can severely burn your fingers and
LIMITED PRODUCT WARRANTY
Thank you for choosing 3RD POWER Amplification. 3RD POWER takes great pride in producing
high-quality tube amplifiers and speaker cabinets. Each product is thoroughly tested prior to shipment.
The HD100 is warranted to the original purchaser to be free from defects in material and workmanship
for the first 33-1/3 years to the original purchaser. An original sales receipt will establish coverage un-
der this warranty. This warranty does not cover service or parts to repair damage caused by accident,
neglect, abuse, normal wear, disaster, misuse, over-powering, negligence, inadequate packing or shipping
procedures and service, repair or modifications to the product which have not been authorized by 3RD
POWER. If this product is defective in materials or workmanship as warranted above, your sole remedy
shall be repair or replacement as provided below.
Tubes: 3RD POWER warrants the original purchaser that the tubes used in the HD100 will be free
from defects in material and workmanship for a period of 90 days from the original purchase date. A
dated sales receipt will establish coverage under this warranty. This warranty is in lieu of all other ex-
pressed warranties. If tubes fail within the initial 90 day period your sole remedy shall be the replace-
ment of tubes as provided below.
Return Procedures: In the unlikely event that a defect should occur, follow the procedure outlined below.
Defective products must be shipped, together with proof of purchase, freight pre-paid and insured di-
rectly to 3RD POWER. A Return Authorization Number must be obtained prior to shipping the prod-
uct. Contact 3RD POWER to obtain this RA number. Products must be shipped in their original pack-
aging or equivalent. IN any case, the risk of loss or damage in transit is borne by the purchaser. The RA
number must appear in large print directly below the shipping address. Always include a brief descrip-
tion of the defect, along with your correct return address and telephone number.
When calling to inquire about a returned product, always refer to the RA number. If 3RD POWER de-
termines that the unit was defective in materials or workmanship at any time during the warranty pe-
riod, 3RD POWER has the option of repairing or replacing the product at no additional charge, except
as set forth below. All replaced parts become property of 3RD POWER. Products replaced or repaired
under this warranty will be returned via ground shipping within the United States, freight prepaid.
3RD POWER is not responsible for costs associated with expedited shipping, either to 3RD POWER or
returned of the product to the customer.
Incidental or Consequential Damage: In no event will 3RD POWER be liable for any incidental or con-
sequential damages arising out of the use or inability to use any 3RD POWER product, even if a 3RD
POWER dealer has been advised of the possibility of such damages or any other claim by any other
party. Some states do not allow the exclusion or limitation of consequential damages, so the above limi-
tation and exclusion may not apply to you. This warranty gives you specific legal rights and you may
also have other rights which may vary from state to state.
For your protection: Please complete and mail the Purchase Information Card within (10) ten days of
the date of purchase so that we may contact you directly in the event a safety notification issued in the
accordance with the 1972 Consumer Product Safety Act.
Customer Support: Our dedicated staff is ready to assist you should you have any questions with regard
to your product. Please call: (615) 945-3393 (9:00 AM to 5:00 PM Monday through Friday, Central
3RD POWER Amplification LLC
2020 Fieldstone Parkway
Franklin, TN 37069
Phone: (615) 945-3393
Friday, April 27, 2012