Rogue Audio Stereo Amplifier Tempest Vacuum Tube Integrated Amplifier User Guide

Issue date : 9/11/00  
Rogue Audio  
Tempest  
Vacuum Tube  
Integrated Amplifier  
Owners Manual  
Vacuum Tube Amplifiers  
 
INTRODUCTION  
Congratulations on your purchase decision! We at Rogue Audio truly  
believe that our amplifiers provide the “smartest” value in high-end  
audio. If you have never owned a vacuum tube amplifier you will be  
thrilled by the silky-smooth sound and incredible detail that only a  
tube amplifier can provide. And with your Rogue Audio amplifier,  
you can be sure that you are getting the very best in tube  
amplification. We at Rogue Audio are extremely proud of our  
products and want you to enjoy them to their fullest potential. So  
please, take the time to read through this short manual so that you can  
be confident that you have set up your amplifier properly.  
SETTING UP YOUR AMPLIFIER  
tools required: phillips head screwdriver and a clean glove or cloth.  
WARNING - This amplifier uses voltages that could cause  
injury or death. Never open the amplifier while it is  
plugged in, and always wait at least one hour after turning  
the unit off to unplug and open the unit. Lethal voltages  
can remain in the electronics after the unit is unplugged.  
1) Opening the box - Carefully remove the amplifier from the box.  
It is important that you retain the packing material and box in the  
event that the amplifier ever needs servicing. The packing  
material and box have been carefully designed to protect your  
valuable equipment during shipping so you don’t want to throw  
them away!  
Rogue Tempest Owners Manual  
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2) Remove Shipping Pallet - The amplifier is attached to a pallet  
that supports the main chassis during shipping. This is critical to  
ensure that no damage occurs in transit. After removing the  
amplifier from the box and packing material, CAREFULLY turn  
the unit upon its side. Remove the 4 thumbscrews and washers.  
Retain these screws and pallet in the event that the unit ever needs  
servicing.  
WARNING : Shipping this unit without correctly attaching  
the shipping pallet can result in serious structural damage  
to the unit.  
3) Remove the Top Cover - Using a phillips head screwdriver,  
remove the top cover of the amplifier chassis.  
WARNING - If the unit has been powered up, you must  
turn off the power at the switch and wait at least one hour  
before disconnecting the electrical cord. After doing so, the  
unit may be unplugged and the top cover removed. This  
time is required for dangerous voltages to dissipate.  
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4) Install Power Tubes - To avoid damage in transit, the power tubes  
are shipped in a protective container inside the main shipping  
container. Carefully unpack the tubes, and using a glove or a  
clean dry cloth, install the tubes as shown in figure 1.  
KT88  
KT88  
12AU7  
12AX7  
12AU7  
12AU7  
12AX7  
12AU7  
Figure 3  
Note that amps may be shipped with a different but equivalent tube  
5) Inspect Input and Driver Tubes - Inspect the remaining tubes to  
ensure that they are fully seated in their ceramic sockets. If a tube  
appears to be tilted or otherwise dislocated, using a glove or clean  
cloth, press down gently on the tube to re-seat it in its socket. See  
Figure 3 for tube locations.  
Rogue Tempest Owners Manual  
3
 
6) Select Mode - The Rogue Tempest features a user selectable  
option of either Triode or Ultra-Linear operating modes. Some  
listeners prefer pure triode operation, however, it does limit the  
power output of the amplifier to approximately 40 watts per  
channel. Ultra-Linear operation offers the amplifier’s full rated  
output power of 60 watts per channel. The user is encouraged to  
try both modes and determine their own preference.  
WARNING - If the unit has been powered up, you must  
turn off the power at the switch and wait at least one hour  
before disconnecting the electrical cord. After doing so, the  
unit may be unplugged and the top cover removed. This  
time is required for dangerous voltages to dissipate.  
To switch modes, use a nonconductive screwdriver to flip the 4  
switches shown in Figure 2 to the chosen settings. The unit is  
shipped from the factory in Ultra-Linear mode.  
Caution - Always ensure that all 4 switches are set alike, in  
either UL or Triode Mode  
Ultra-Linear /  
Triode Switch  
4 Places  
Rogue Tempest Owners Manual  
4
 
7) Matching Speaker Impedance - The Rogue Tempest provides  
options for either 4 ohm or 8 ohm speakers. The impedance  
selected will depend on the speakers used. Consult either the  
owner’s manual for your speaker or your local dealer to  
determine the correct choice. To switch impedance setting, refer  
to Figure 3. Note - the amplifier is factory set for 8-ohm  
speakers.  
Using a 5/16” wrench, remove the outermost nut from the  
red binding post.  
Remove the wire and lug marked 8 ohm from the binding  
post. Leave the wire and lug marked feedback in place.  
Warning -Never remove the lugs marked feedback or  
ground from the binding posts. Doing so could cause  
permanent damage to the unit  
Remove the polyurethane tubing from the unused 4-ohm  
wire and lug.  
Place 4-ohm wire and lug onto red binding post.  
4 Ohm  
Binding  
Wire  
Feedback  
Wire  
Post  
8 Ohm  
Wire  
Figure 3  
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Place polyurethane tubing on the 8-ohm wire and lug.  
Replace nut onto binding post and tighten with wrench.  
8) Attach Power Cord - Connect the IEC end of detachable power  
cord to the amplifier, and plug opposite end into corresponding  
outlet.  
9) Connections to other components -. The input connections from  
the musical source are made via RCA jacks on the rear of the  
amplifier. Be sure to use high quality interconnect cables - they  
do make a difference.  
10) Polarity - The Rogue Tempest amplifier is a non-inverting  
amplifier (positive signal in gives positive signal out) so, for best  
sound, care should be taken to ensure correct polarity at the  
speaker terminals. Connect the positive (+) outputs of the  
Tempest to the positive (+) terminals of the loudspeakers and the  
negative (-) outputs to the (-) negative loudspeaker terminals.  
11) Amplifier Location - The Rogue Tempest amplifier is an enclosed  
tube design with forced air ventilation and cooling. This cooling  
has been designed and tested to ensure long term reliability and  
safety of the unit. The amplifier should be placed in such a way  
that this airflow is not impeded. See Figure 7.  
USING AN EXTERNAL PREAMPLIFIER  
The Tempest offers the flexibility of adding an external  
preamplifier should the user wish to do so. In the external preamp  
mode the Tempest preamp is completely bypassed and only the  
power amplifier section is used. To set up the Tempest for use  
with an external preamp perform the following steps.  
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1) Remove the cover  
WARNING - This amplifier uses voltages that could cause  
injury or death. Never open the amplifier while it is  
plugged in, and always wait at least one hour after turning  
the unit off to unplug and open the unit. Lethal voltages  
can remain in the electronics after the unit is unplugged  
2) Locate the four small shunts on the control circuit board as shown  
in figure 4.  
3) Using a needle nose pliers carefully remove the four shunts from  
the locations marked “int pre” and move them to the adjacent  
locations marked “ext pre.”  
4) Rotate the selector knob to preamp on the front panel.  
5) Connect the external preamp to the inputs on the rear panel  
marked preamp.  
External /  
Internal  
Preamp  
Shunts  
Figure 4  
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OPERATING YOUR TEMPEST  
1) Delays- Note that the Tempest is equipped with a slow turn-on  
feature that protects other equipment from dangerous transients at  
turn-on as well as significantly prolonging tube life.  
2) Powering up the system - First turn on the amplifier by pushing in  
the “power” button. The red LED will light showing that the unit  
is powered up. After approximately 10 seconds the outputs will  
disconnect from ground. After another 10 seconds, the control  
section will be unmuted and the Tempest is ready to play music.  
Note : This unit will not play for approximately 20 seconds  
after power on while tubes warm up.  
3) Switches and Controls - The Tempest is equipped with volume,  
balance, source, power, mute, and an optional remote volume .  
Volume – adjust gain from 0 to 23Volts out  
Balance - left and right channel attenuation  
Source - selects source material (CD, phono, tape, tuner, aux, preamp)  
Power - on/off operation  
Mute - mutes output  
Remote Volume Control - The Tempest is optionally equipped with an  
analog remote volume control feature. The volume may be  
adjusted manually using the knob on the front panel, or by using  
the remote control provided.  
4) Breaking in the amplifier - As with many high-quality audio  
amplifiers, the sound of the Rogue Tempest amplifier will  
improve during the first 50 to 100 hours of use. This time is  
required for components to “burn in.” No special techniques are  
required other than standard operation.  
Note: This unit will not sound its best until the tubes have  
warmed up. This will take approximately 5-10 minutes  
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MAINTENANCE  
The Rogue Tempest has been designed to provide many years of  
enjoyable and reliable service. The greatest care has been taken to  
select vacuum tubes that provide superior sound and ensure long life.  
However, at some point in time, the tubes will wear out. The factory-  
installed tubes should last thousands of hours. Should it become  
necessary to replace a tube, follow the instructions listed below.  
Replace Tubes by :  
1) Turn off power at switch.  
2) Wait one hour for dangerous voltages to dissipate.  
3) Unplug power cord from wall socket.  
4) Remove the top cover. See figure 2.  
5) Using a glove or clean dry cloth, carefully remove the tubes from  
their sockets - DO NOT TOUCH ANY OTHER ELECTRICAL  
COMPONENTS.  
6) Obtain and insert a new set of tubes. It is recommended that a  
new set of tubes be obtained from Rogue. If tubes are obtained  
from another source, follow the diagram in figure 3 for tube type.  
7) Insert new tubes in sockets using a glove or cloth. See figure 3 for  
locations.  
No other items in the unit are designed to be user serviceable.  
WARNING - This amplifier uses voltages that could cause  
injury or death. Never open the amplifier while it is  
plugged in, and always wait at least one hour after turning  
the unit off to unplug and open the unit. Lethal voltages  
can remain in the electronics after the unit is unplugged  
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IF THERE IS A PROBLEM  
IF SOUND IS NOT PRESENT OR IS ONLY IN ONE CHANNEL  
1) Ensure that power cord is secure and the power LED is on  
2) .Check that all input and output signal connections are secure.  
3) Check that the mute button is not pushed in.  
4) Check that the balance knob is not turned.  
5) Ensure that all tubes are properly seated in sockets.  
IF THE SOUND IS DISTORTED  
1) Ensure tubes are in proper locations. See Figure 3.  
2) It is possible that a tube has gone bad. Return the unit to the  
dealer to test the tubes.  
IF THERE IS A 50/60 Hz HUM  
1) Make sure that the Tempest and source components are plugged  
into the same outlet or power strip.  
2) If you are using a power conditioner try the Tempest without the  
power conditioner.  
3) Unplug all other equipment from the Tempes and work  
backwards connecting the preamp, source, etc back in until the  
source of the hum/ground loop is determined  
If these solutions do not clear up the problem, please call Rogue Audio  
Technical Support at 570-992-9901.  
Rogue Tempest Owners Manual  
10  
 
ADDING A ROGUE EIGHTY-EIGHT POWER AMP  
One of the features of the Tempest is that a Rogue Eighty-Eight  
power amplifier can be added at a later date to increase the system  
power. It is important to use a Rogue Eighty-Eight amplifier so that  
the power levels are equivalent between the two amplifiers for a given  
input signal. It is also required that the speakers are capable of being  
biamped (Separate inputs for tweeters and woofers) The procedure  
for biamping is as follows:  
1) Remove the shorting connection on the speakers between the  
tweeter and woofer inputs.  
2) Attach the Speaker wires from the Tempest to the tweeter  
connectors on the loudspeakers.  
3) Attach speaker cables from the Eighty-Eight amp to the woofer  
connectors on the loudspeakers.  
4) Connect the active outputs of the Tempest to the inputs of the  
Eighty-Eight amp.  
OWNER AND WARRANTY REGISTRATION FORM  
Included with this manual is an Owner and Warranty Registration  
Form. Please take a minute to fill out this card and return it Rogue  
Audio.  
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SPECIFICATIONS  
output power  
60 WPC  
frequency response  
THD  
10Hz - 20 kHz  
< 0.1% typical  
< 1% at rated power  
input sensitivity  
dimensions  
1.0 V RMS  
18 ¼” W x 15 ¾” D x 7” H  
60 Lbs  
weight  
power requirements  
115/230V - 50/60Hz  
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LIMITED WARRANTY  
Warranty Period  
This product has been manufactured under the highest standards of quality and  
workmanship. Rogue Audio Inc. (hereinafter “Rogue Audio”) warrants this product  
against defects in material or workmanship as follows:  
With the exception of vacuum tubes, Rogue Audio warrants to the consumer all  
parts of this product against defects in material and workmanship for a period of  
three years from the date of retail purchase. Rogue Audio warrants the vacuum tubes  
for a period of six months from the date of retail purchase. Any defective parts will  
be replaced free of charge, excluding shipping and handling.  
Proof of purchase in the form of a bill of sale or recited invoice, which indicates  
that the product is within the warranty period, must be presented to obtain warranty  
service. Rogue Audio suggests that the purchaser retain the dealers bill of sale as  
evidence of the date of retail purchase.  
What’s Not Covered  
This warranty does not cover cosmetic damage or any damage that results from  
product misuse, product abuse, installation error, connection to an improper voltage  
supply, accident, improper maintenance, alterations, modifications not authorized in  
writing by Rogue Audio, lightening, power surges, or acts of God. Use of any other  
than Rogue Audio factory parts may void this warranty.  
This warranty does not cover the cost of parts and labor, which would be otherwise  
provided without charge under this warranty, obtained from any source other than  
Rogue Audio.  
This warranty applies only to consumer use of this product and does not cover any  
product that is used in any trade or business, or in an industrial or commercial  
application.  
This warranty is valid only in the United States.  
YOUR RIGHTS  
ROGUE AUDIO LIMITS ITS OBLIGATIONS UNDER ANY IMPLIED  
WARRANTIES UNDER STATE LAWS TO A PERIOD NOT TO EXCEED THE  
WARRANTY PERIOD. SOME STATES DO NOT ALLOW LIMITATIONS ON  
HOW LONG AN IMPLIED WARRANTY LASTS, AND SOME STATES DO NOT  
ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR  
CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATIONS OR  
EXCLUSIONS MAY NOT APPLY TO YOU. THIS WARRANTY GIVES  
YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY HAVE OTHER  
RIGHTS, WHICH MAY VARY FROM STATE TO STATE.  
To Obtain Service  
To obtain service, you must contact Rogue Audio and obtain a return authorization  
number. The product must be delivered to Rogue Audio in its original packaging  
prepaid at the following address:  
Rogue Audio Inc.  
675 Route 209  
Sciota, PA 18354  
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13  
 
THE ROGUE AUDIO MISSION .........  
At Rogue Audio we design and manufacture vacuum tube amplifiers. There is  
fierce competition in this market and we will only survive by delivering a  
superior product and superior service - we have the engineering and  
managerial talent to do so. Our core competencies are electrical, mechanical  
and production engineering, along with an overarching passion for excellence.  
These skills will be used to create products that offer outstanding value in the  
high-end marketplace.  
Rogue Audio amplifiers will always be engineered to provide the four key  
/elements of audio value:  
superior sonics  
high quality and reliability  
an outstanding appearance  
an affordable price  
Our philosophy is simple - We will never design any amplifier that we would  
not purchase for ourselves.  
Rogue Audio Inc.  
2827 Avery Road  
Slatington, PA 18080  
 

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