A/DA T100S User manual

T100S All Tube Stereo Guitar Amplifier
OWNER’S MANUAL
Originally written by ADA SIGNAL PROCESSORS, INC. Scanned and edited by Jur at 30th of april 2003. Original
ADA logo edited and rendered by Barend Onneweer of Raamw3rk.) The version of this manual is copyrighted and
may not be sold or placed on a website without permission of the editor.
Release No.1 for http://www.adadepot.com

ADA T100S owner’s manual
CONTENTS
Introduction
Features
Specifications
Precautions
SetUp
Tube Replacement
Speaker Impedance
Accessories
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ADA T100S owner’s manual
T100S OWNER’S MANUAL
Thank you for purchasing the ADA T100S All Tube Stereo Guitar Power Amplifier. The
T100S is a Class B Tube amplifier designed specifically for use with guitar component
systems, such as the ADA MP-1 MIDI TUBE PREAMP and SPLIT-STACK SPEAKER
CABINETS. Your new T100S will preserve all the tone and fidelity from your guitar, preamp,
and effects units, while delivering warm, clean tube power to your speaker cabinets. Please
take a few moments to read this manual and familiarize yourself with your new T100S.
Important: Fill-out the enclosed warranty card now and return it to ADA.
FEATURES
• Preserves tube fidelity: distortion, compression, and all harmonics.
• Optimized for use with guitar speaker cabinets.
• High voltage regulation to produce clean transient response and protect tubes.
• Portable, lightweight design - only 27 pounds.
• Can be tail mounted with tail mount kit.
• One year parts and labor warranty (90 days on tubes).
SPECIFICATIONS
Input Impedance: 50k ohms
Output Power: 50 Watts per channel into an 8 ohm load.
Frequency Response: 10 Hz to 20 kHz
Controls: Power on – off
Standby on - off
Separate channel attenuators
Separate output impedance selectors of 4, 8, or 16 ohms.
Weight: 27 Lbs.
Depth: 9.5 In.
Height: 2 rack space (3.25”)
PRECAUTIONS
WARNING: To prevent fire or shock hazard, do not expose this appliance to rain or
moisture.
CAUTION: To prevent electric shock, do not remove cover. No user serviceable parts
inside. Refer servicing to qualified service personnel.
SET UP
Check impedance of speaker array to be used with the T100S. If you are using more than
one cabinet per side refer to the speaker configuration diagram F on page 10. An overall
impedance from 4 ohms to 16 ohms is recommended for maximum performance. Set
impedance selector on rear panel to match the overall impedance of your speaker array for
each channel (you can run different impedances on each channel). Connect stereo inputs on
rear panel of T100S to the outputs of your preamp or effects device, using line level outputs.
If you're not running stereo, connect only one input cable to the T100S. The T100S cannot
be used as a bridged-output amplifier.
Use speaker cables to connect T100S outputs to the inputs of your speaker cabinets (12 to
16 gauge speaker cable only). Note: If you are using one mono speaker cabinet you should
not connect anything to the unused output from the T100S. Set the input attenuator to "0" on
the unused channel if you are playing in mono. Your T100S will automatically shut down
power to the unconnected channel. No dummy load is required.
Before turning your T100S on, make sure the front panel volume attenuators are in a fully
counter-clockwise position. Power up your system in the order of signal flow. Preamp first,
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ADA T100S owner’s manual
Power amp last. To shut down your system, turn volume attenuators down and use the
reverse procedure: Power amp first, Preamp last.
NOTE: To prolong tube life, let your T100S warm-up in standby mode for at least one
minute before use. Before turning your T100S off let it cool in standby mode
or at least one minute.
TUBE REPLACEMENT
With proper care the tubes in your T100S will yield many hours of performance. When your
amp becomes microphonic and/or noisy, it's time to replace the tubes. Only ADA
replacement tubes should be used. Tubes must be replaced as a set per channel. To replace
tubes, first disconnect A.C. power. Let your T100S cool with power turned off for one
minute to allow caps to discharge. Remove top cover plate. Using caution not to break
tubes, pull spring-connected tube retainers off the top of the tubes and let them rest against
the side of the tubes. Pull tubes from their sockets and plug in the new ADA tubes. Carefully
pull tube retainers into position. Replace top cover and screws. Note: Tubes are fragile,
handle them with care. To order a matched set of ADA tubes, contact your Authorized ADA
Dealer.
SPEAKER IMPEDANCE
It is important to always "match" your speaker system to your power amplifier, especially
when using component systems such as the ADA MP-1 & T100S power amplifier. A proper
impedance match will give you optimal performance and keep your power amp in a "safe
operating area" so it won't overheat or blow fuses.
To get the proper impedance match using more than one speaker involves a little bit of
thought because the overall impedance of all the speakers on a channel is what the amplifier
"sees". The overall impedance is the important value that must be known for proper
impedance matching.
The impedance of a single speaker is the amount of resistance to an electrical signal at 1000
cycles per second (Kilohertz, abbreviated KHz). A 16 ohm speaker means that there is 16
ohms (units of resistance) at 1KHz. When connecting a single 8 ohm speaker to an amplifier,
the amplifier will be "driving" an 8 ohm load.
When speaker cabinets have more than one speaker in them, and depending on how they
are connected, the impedance can have various values.
In these diagrams we are using the same type of 16 ohm speaker. Diagram A is a simple
one speaker configuration. Diagram B is a series connection. To get the overall impedance
add the two speakers' impedances (16 + 16 = 32).
Diagram C is a parallel configuration. Some of the electrical signal goes to the top speaker
and some goes to the bottom. For the two speakers (of equal impedance) the total
impedance is 1/2 of the value of each speaker (1/2 x 16 = 8).
If you have four equal impedance speakers in parallel as shown in diagram D, the overall
impedance is 1/4 of the value of one speaker (1/4 x 16 = 4).
Diagram E is the same as diagram D except the four speakers are split into two cabinets.
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ADA T100S owner’s manual
ACCESSORIES
For price and ordering information contact your local Authorized ADA Dealer.
• Tail mount kit: secures rear panel of amplifier to rack mount rails. ADA part #
800310
• 6CA7 power tube matched set: replacement tube set for one channel. ADA part #
800302
• 12AT7 driver tube matched set: replacement input driver tube set for two
channels. ADA part # 800301
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ADA T100S owner’s manual
The ADA SPLIT-STACK speaker cabinet uses two 16-ohm speakers that are wired in
parallel, which makes the cabinet an 8-ohm load. Only ADA SPLIT-STACK speaker cabinets
offer you the versatility of parallel and series extension ports, allowing you to combine
cabinets in various impedance configurations.
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