Nady Systems Stereo Amplifier GTH 100 User Manual

O W N E R ’ S M A N U A L  
GTH-100  
Tube Guitar Head Amp w/ Reverb  
 
WARNING  
An equilateral triangle enclosing a lightening flash/arrowhead symbol is  
intended to alert the user to the presence of uninsulated dangerous  
voltagewithin the products enclosure which may be of sufficient  
magnitude to constitute a risk of electric shock.  
ATTENTION RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR  
:
An equilateral triangle enclosing an exclamation point is intended to alert  
the user to the presence of important operating and service instructions in  
the literature enclosed with this unit.  
IMPORTANT SAFETY INSTRUCTIONS  
When using this electronic device, basic precautions should always be taken, including the following:  
1. Read all instructions before using the product.  
2. Do not use this product near water (e.g., near a bathtub, washbowl, kitchen sink, in a wet basement, or near a  
swimming pool, etc.).  
3. This product should be used only with a cart or stand that will keep it level and stable and prevent wobbling.  
4. This product, in combination with headphones or speakers, may be capable of producing sound levels that  
could cause permanent hearing loss. Do not operate for a long period of time at a high volume level or at a  
level that is uncomfortable. If you experience any hearing loss or ringing in the ears, you should consult an  
audiologist.  
5. The product should be positioned so that proper ventilation is maintained.  
6. The product should be located away from heat sources such as radiators, heat vents, or other devices  
(including amplifiers) that produce heat.  
7. The product should be connected to a power supply only of the type described in the operating instructions or  
as marked on the product. Replace the fuse only with one of the specified type, size, and correct rating.  
8. The power supply cord should: (1) be undamaged, (2) never share an outlet or extension cord with other  
devices so that the outlets or extension cords power rating is exceeded, and (3) never be left plugged into  
the outlet when not being used for a long period of time.  
9. Care should be taken so that objects do not fall into, and liquids are not spilled through, the enclosures  
openings.  
10. The product should be serviced by qualified service personnel if:  
A.  
B.  
The power supply cord or the plug has been damaged.  
Objects have fallen into, or liquid has been spilled onto the product.  
C. The product has been exposed to rain.  
D. The product does not appear to operate normally or exhibits a marked change in performance.  
E.  
The product has been dropped, or the enclosure damaged.  
11. Do not attempt to service the product beyond what is described in the user maintenance instructions. All  
other servicing should be referred to qualified service personnel.  
3
 
INSTALLATION  
To ensure years of enjoyment from your NADY AUDIO GTH-100, please read and understand this manual thoroughly before  
using the unit.  
INSPECTION  
Your NADY AUDIO GTH-100 was carefully packed at the factory in packaging designed to protect the units in shipment.  
Before installing and using your unit, carefully examine the packaging and all contents for any signs of physical damage  
that may have occurred in transit.  
[Please note: Nady Systems is not responsible for shipping damage. If your unit is damaged, do not return to Nady, but  
notify your dealer and the shipping company (if shipped to you) immediately to make a claim. Such claims must be made  
by the consignee in a timely manner.]  
CONTENTS  
Instruction manual  
GTH-100 (verify that the units serial number is same as shown on shipping carton)  
FS-2 Dual footswitch  
AC Power cord  
Warranty Card  
POWER CONNECTION  
The GTH-100 has an internal power supply and is designed to operate from an external AC source. Power requirements  
for electrical equipment differ from area to area. Be sure to confirm that the voltage selected by the voltage selector switch  
on the back panel is proper for your area (120VAC/60 Hz or 230VAC/50Hz) per the information below:  
Europe (except UK): 230V, 50Hz  
UK and Australia: 240V, 50Hz  
USA and Canada: 120V, 60 Hz  
For other areas, please check with local authorities.When ready to operate, plug the AC cord into the power source. Make  
sure that the unit is turned off before connecting to the AC power source to avoid possible loud transients that can  
damage your speakers or your ears, especially when monitoring with headphones.  
LEGAL INFORMATION  
NOTICE  
The information in this document is subject to change, as the Company may make changes to product in order to improve  
reliability, design, or function, without prior written notice. No part of this manual may be reproduced or transmitted in any form  
or by any means without the written permission of the company.  
IN NO EVENT WILL THE COMPANY BE LIABLE FOR SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES,  
WHETHER ARISING DIRECTLY OR INDIRECTLY, SUCH AS LOSS OF PROFIT OR GOOD WILL, THAT MAY BE  
SUFFERED IN CONNECTION WITH THE PURCHASE OF THIS PRODUCT OR FROM THE BREACH OF ANY  
REPRESENTATION OR WARRANTY.  
LICENSE  
The Company grants the customer a non-exclusive, non-transferable license to use the software, if any, accompanying this  
product for internal use on a single computer system. The end user may make a single copy of the software solely for backup  
purposes; otherwise, no copies may be made of the software or any part thereof. No other license of any kind is granted to  
any part of the product or any of the intellectual property therein.  
4
 
FRONT CONTROLS AND CONNECTIONS  
(6)  
(11)  
(12)  
(10)  
(3) (2) (1)  
(8)  
(4) (5)  
(7)  
(9)  
(13)  
1. POWER SWITCH  
This switch turns the main power on and off. Flipping  
Note: The VOLUME and MASTER controls also affect  
the final signal level and the amount of distortion.  
the toggle switch up to the ON+ position will turn on the  
amp in phasewith the main AC line voltage. Flipping  
the switch down to the ON- position will reverse the  
polarity. In some cases, AC hum (caused by ground  
loops) can be reduced by reversing the polarity. Select  
the On position which has the least amount of AC hum.  
For cleanest operation (least distortion) adjust the  
VOLUME to a very low setting, the MASTER to  
maximum, and the DISTORTION to Position 1.  
For medium distortion (or crunch) adjust the  
VOLUME to past the mid position, the MASTER to  
mid, and the DISTORTION to Position 2.  
2. POWER INDICATOR LIGHT  
Lights when the unit is powered on.  
For maximum distortion adjust the VOLUME to  
maximum, the MASTER to a very low setting, and  
the DISTORTION to Position 3.  
3. HI / STBY / LO SWITCH  
Flipping this toggle switch to the STBY position will  
respectively disable the audio to the amplifier and the  
outputs and put the amp in standby mode. This allows  
for proper warm-up of the tubes before applying signal to  
them, and allows the amp to stay warm when not in  
immediate use. To extend the life of the tubes, always  
turn the Main Power Switch on first, for 1-2 minutes,  
before flipping the Standby Switch to LO or HI. Set the  
switch to LO, which will enable audio with a maximum of  
30W RMS output power, if the highest volume is not  
necessary, or, if you want to achieve more distortion at  
the output tubes. Flipping the switch to HI will enable  
audio to the amplifier with a maximum 100W RMS  
output.  
7. VOLUME CONTROL  
This adjusts the level of the input signal to the amp.  
Increasing this level will create distortion dependent on  
the DISTORTION SELECTOR setting.  
8. MASTER VOLUME CONTROL  
Adjusts overall loudness of the amp.  
9. TREBLE CONTROL  
Adjusts the level of treble/Hi frequencies.  
10. MID CONTROL  
Adjusts the level of mid-range frequencies.  
4. HIGH INPUT JACK  
Input for instrument outputs like passive guitar outputs,  
keyboard, mics for harmonicas, and other effects  
devices.  
11. BASS CONTROL  
Adjusts the level of bass frequencies.  
12. PRESENCE CONTROL  
Adjusts the high overtones, texture, and feel of the amp.  
5. LOW INPUT JACK  
The Low Input Jack has a pad with approx 9dB with  
lower gain than the High Input Jack. This should be  
used with higher level electronic devices or to achieve  
more range from the gain controls before distortion.  
13. REVERB CONTROL  
Adjusts the level of reverb mixed with the dry signal.  
6. DISTORTION SELECTOR  
This three-way switch selects the input sensitivity and  
amount of overdrive distortion. Position 1 offers the  
cleanest signal with least amount of distortion. Position  
3 has the maximum amount of distortion.  
5
 
REAR CONTROLS AND CONNECTIONS  
(4)  
(1)  
(2) (3)  
(6)  
(7)  
(5)  
1. POWER CONNECTION  
5. SPEAKER OUTPUTS  
Power output jacks for  
connecting to 4, 8, and  
16speaker cabinets.  
Although compatible with  
many cabinets, for best  
results it is recommended  
that the GTH-100 be used  
to power the matching  
GAC-412 cabinet (8),  
A standard IEC AC power socket for connecting to the  
main AC supply. The IEC power socket has an integral  
fuse holder that takes a 20mm fuse.  
NOTE:  
• Always replace a blown fuse with the same type  
as specified on the rear panel and under  
Specifications (pg. 7) for the corresponding AC  
voltage being used.  
which utilizes (4x) 12Nady  
PowerDrivespeakers for  
optimum tone and  
• Before you connect your GTH-100 to the AC,  
please make sure that your local voltage matches  
the Voltage Selector Switch.  
maximum output.  
• Do not remove the center ground conductor.  
6. LINE OUT  
This line level output signal is derived from the output of  
the power amp to incorporate all the characteristics, color  
and tonal response of the output tubes. This signal can  
be input into any device, such as an audio mixer or  
another amplifier, and can be useful in many live sound  
or recording applications.  
2. VOLTAGE SELECTOR SWITCH  
For selecting the proper voltage (115/230VAC) to match  
the power supply in your area.  
3. HIGH VOLTAGE FUSE  
1A 250V fast blow fuse  
7. REVERB OUT  
4. FOOTSWITCH JACK  
A pure reverb signal output. This may be used for  
recording by plugging into mixing consoles/recording  
devices or for stereo effects by using an outboard amp  
and speaker.  
For connecting to the included FS-2 dual footswitch. On  
the FS-2, the right switch controls the Reverb on/off. The  
left switch controls the Lead Boost on/off for adding up to  
12dB of gain at the preamp stage. Note: connecting the  
FS-2 will automatically decrease the level at the preamp  
input stage allowing it to be boosted to a higher  
level when the Lead Boost is switched  
on.  
6
 
SPECIFICATIONS  
Power Amp Section ..................................................................................................................................Four EL34 Tubes  
Power Output ....................................................................................................100W RMS @ 48165% THD  
Preamp Section ..................................................................................................................................Three 12AX7A Tubes  
Input Imp. ........................................................................................................................ HI input 200K , LO input 50K Ω  
Input Sens. (1KHz) .................................................................................... HI input max clean 800mV, Max distortion 8mV  
LO input max clean 1.6V, Max distortion 16mV  
LO Input Attenuation .................................................................................................................................................... 9dB  
Lead Boost Range ...................................................................................................................................................... 12dB  
Line Output Imp........................................................................................................................................................... 600Ω  
Line Output Level .............................................................................................................................................. 1V nominal  
Reverb Output Imp. ........................................................................................................................................................ 1K  
Reverb Output Level.......................................................................................................................................... 1V nominal  
Power Requirements.......................................................................................................... 120 VAC 60Hz, 230 VAC 50Hz  
Power Fuse.......................................................................................................................... 5x20mm glass tube, slow-blow  
4A/250V for 115VAC, 2A/250V for 230VAC  
High Voltage Fuse .................................................................................................................................. 1A 250V fast blow  
Dimension ...................................................................................................................... 28x 10.75x 9(71 x 27 x 23cm)  
Weight .............................................................................................................................................................. 45 lbs (20kg)  
TUBE REPLACEMENT  
Preamp Tubes 12AX7A No adjustment required  
Output Tubes EL34 After replacing output tubes, output tubes bias voltage should be checked with Standby switch  
set to On, no signal input, and all controls set to minimum. If output tube bias voltage is not correct, amplifier will sound  
unusually distorted with mushy audio and output tubes may overheat. Normal output tube bias voltage should be -46VDC  
on Pin 5 of all output tubes. For best results use matched output tubes.  
Caution: Do to dangerously high voltage, these adjustments should only be made by qualified technician.  
The specifications above are correct at the time of printing of this manual. For improvement purposes, all specifications for this unit, including design  
and appearance, are subject to change without prior notice.  
7
 
SERVICE FOR YOUR NADY AUDIO PRODUCT  
(U.S.) Should your NADY AUDIO product require service, please contact the Nady Service Department via  
telephone at (510) 652-2411, or e-mail at [email protected].  
(International) For service, please contact the NADY AUDIO distributor in your country through the dealer from  
whom you purchased this product.  
DO NOT ATTEMPT TO SERVICE THIS UNIT  
YOURSELF AS IT CAN BE DANGEROUS  
AND WILL ALSO VOID THE WARRANTY.  
NADY SYSTEMS, INC. 6701 SHELLMOUND STREET, EMERYVILLE, CA 94608  
Tel: 510.652.2411 Fax: 510.652.5075 nady.com  
 

MSi Network Router RG300EX User Manual
Multiquip Portable Generator GBP5000H User Manual
NAD Stereo Amplifier 10 20 B User Manual
Nikon Camera Lens 105mm f 28G ED IF DX User Manual
Niles Audio Portable Speaker HD5 User Manual
Oreck Vacuum Cleaner XL2100HH User Manual
Oster Blender BLSTMG User Manual
Panasonic All in One Printer DP 8060 User Manual
Panasonic DVD Player DVD A105U User Manual
Panasonic Telephone KX TC1025ALW User Manual