Transcript
The Pak Amp User’s Manual
www.khanaudio.com
Welcome and congratulations on purchasing a Khan Pak Amp.
Dual Channel (2PAK) Model2
The Khan Pak is a full featured Vacuum Tube Guitar Amplifier. Powered by a pair of NOS 6AQ5 Beam Power tubes, the PAK delivers classic rock guitar tone that spans decades. This unique design can fit in a backpack, gig bag, or carry on luggage for the working musician on the go. It is as equally useful in the studio, providing a wide range of tonal variety and an exceptional line out in a compact format. We hope you enjoy the all tube tones inside!
Table of Contents Welcome and Safety Guidelines .............................................................................2 Khan Pak Models Features ......................................................................................3 Front Panel - Single Channel (PAK) Model ..........................................................4-5
Single Channel (PAK) Model1
Front Panel - Dual Channel (2PAK) Model ...........................................................6-7 Back Panel - Both Models ....................................................................................8-9 Technical Specs & Warranty ..................................................................................10 Block Diagram ........................................................................................................11
Important: Precautions & Safety Guidelines All KHAN products are designed for continuous safe operation, as long as common sense is used and steps are taken to help avoid certain problems. Abiding by the following rules can help prevent damage to your amplifier, yourself and others.
Single Channel (PAK) Model1:
Dual Channel (2PAK) Model2:
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Gain and Master Controls (2) 12AX7 and (2) 6AQ5 tubes Bright and Mid Boost Switches Mid Boost foot switchable
• The amplifier is equipped with a three-pronged AC power cord. To reduce the risk of electrical shock, never remove or otherwise attempt to defeat the ground pin of the power cord.
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• Connect the amplifier ONLY to a properly grounded AC outlet of the proper voltage for your amp. • Always match the total speaker impedance to the amplifier.
Dual Concentric Gain and Master Controls (3) 12AX7 and (2) 6AQ5 tubes Bright, Channel, Presence and Mid Boost Switches Channel and Mid Boost foot switchable
• Unplug the amplifier before cleaning it. NEVER spray liquid cleaners onto the amplifier. Wipe it with a slightly dampened, lint-free cloth to remove dirt and film. • Amplifiers capable of producing high volume levels are also capable of inflicting permanent hearing loss or damage, if the exposure to such levels is prolonged. Such damage is progressive and irreversible!
CAUTION
ATTENTION RISQUE D'ELECTROCUTION NE PAS OUVRIR
ELEKTRISCHE SCHLAGGEFAHR NICHT OFFENEN
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER. NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
ATTENTION: POUR REDUIRE D'ELECTROCUTION NE PAS ENLEVER LE COUVERCLE. AUCUNE PIECE INTERNE N'EST REPRABLE PAR L'UTILISATEUR. POUR TOUTE REPARATION, S'ADRESSER A UN TECHNICIEN QUALIFIE.
VORSICHT: ZUR MINIMIERUNG ELEKTRISCHER SCHLAGGEFAHR NICHT DEN DECKEL ABENHMEN. INTERNE TEILE KONNEN NICHT VOM BENUTZER GEWARTET WERDEN. DIE WARTUNG IS QUALIFIZIERTEM WARTUNGSPERSONAL ZU UBERLASSEN.
RISK OF ELECTRIC SHOCK DO NOT OPEN
VORSICHT
THIS EQUIPMENT HAS BEEN DESIGNED AND ENGINEERED TO PROVIDE SAFE AND RELIABLE OPERATION. IN ORDER TO PROLONG THE LIFE OF THE UNIT AND PREVENT ACCIDENTAL DAMAGES OR INJURY, PLEASE FOLLOW THESE PRECAUTIONARY GUIDELINES: WARNING: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT OPEN CHASSIS; DO NOT DEFEAT OR REMOVE THE GROUND PIN OF THE POWER CORD; CONNECT ONLY TO A PROPERLY GROUNDED AC POWER OUTLET. CAUTION: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. CAUTION: NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. CAUTION: OUR AMPLIFIERS ARE CAPABLE OF PRODUCING HIGH SOUND PRESSURE LEVELS. CONTINUED EXPOSURE TO HIGH SOUND PRESSURE LEVELS CAN CAUSE PERMANENT HEARING IMPAIRMENT OR LOSS. USER CAUTION IS ADVISED AND EAR PROTECTION IS RECOMMENDED IF UNIT IS OPERATED AT HIGH VOLUME. The chart below shows the U.S. Government Occupational Safety and Health Administration (OSHA) regulations which were in effect at the time of this publication for permissible noise exposure, per 29CRF1910, Table G-16. SOUND LEVEL dBA SLOW RESPONSE
DURATION PER DAY IN HOURS
SOUND LEVEL dBA SLOW RESPONSE
DURATION PER DAY IN HOURS
90 92 95 97 100
8 6 4 3 2
102 105 110 115
1-1/2 1 1/2 1/4 or less
Shared Features: • • • • • • • • •
Switchable 10 or 18 watts @ 5% THD Treble, Middle, Bass tone stack Buffered FX Loop Send and Return Speaker simulated balanced line out Silent operation with internal 8 ohm load Speaker Impedance selector - 8 and 16 ohm Built in cooling fan with high/low switch Made in USA custom transformers Compact size: 9" x 7" x 2 1/2". Weight: 6 1/2 pounds
According to OSHA, any exposure in excess of those listed above could result in some hearing loss. EXPLANATION OF GRAPHICAL SYMBOLS:
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"DANGEROUS VOLTAGE"
= "DANGER HAUTE TENSION" "GEFAHLICHE SPANNUNG"
"IT IS NECESSARY FOR THE USER TO REFER TO THE INSTRUCTION MANUAL"
= "REFERREZ-VOUS AU MANUAL D'UTILISATION"
"UNBEDINGT IN DER BEDIENUNGSANLEITUNG NACHSCHLAGEN"
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Single Channel (PAK) Model Input: High 1 Megohm input impedance for maximum signal and tone from your instrument. Standard ¼” jack
Bass: Controls the low frequency response at 100 Hz. Adjust this to taste with the speaker cabinet of choice. Mid Boost: Adds a thickening boost that drives the power amp with full range signal. This is foot switchable via ftsw jack on both models.
Gain: Controls the gain of the preamp. Adjust to taste for the sound desired. The gain structure of the Pak Amp is very dynamically responsive. Even at maximum gain the amp will clean up well with the guitar volume knob.
Footswitch Jack: Use any one button footswitch. The footswitch will activate the mid boost function.
Bright Switch: Adds brightness and boosts the preamp gain above 1KHz. This is a useful switch to compensate for different types of pickups.
Master: Controls the overall volume of the amplifier. Full output is achieved around ¾ of the way up. Increasing the master beyond this adds power tube breakup and compression.
Treble: Controls the high frequency response of the amplifier at a frequency of 2 KHz. Adjust to taste with your particular guitar and pickups Mid: controls the midrange response at 900 Hz. This control “fills” the sound or “scoops” it for more clarity and sizzle
TIP #1: Although any cabinet may be used, the Pak Amp is best suited with a “greenback” type speaker cabinet. Some modern speakers tend to be peaky and harsh in the midrange. Speakers are critical to the tone as they are the final component to transfer the electrical energy into sound. 4
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Dual Channel (2PAK) Model Input: High 1 Megohm input impedance for maximum signal and tone from your instrument. Standard ¼” jack Gain: Controls the gain of the preamp. Adjust to taste for the sound desired. The inner knob is for channel 1 (clean). And the outer knob is for channel 2 (dirty). The gain structure of the Pak Amp is very dynamically responsive. Even at maximum gain the amp will clean up well with the guitar volume knob.
Bass: Controls the low frequency response at 100 Hz. Adjust this to taste with the speaker cabinet of choice. Presence Switch: This provides a boost above 2.5Khz for maximum cut through a mix. It can be used to smooth the sound at lower volumes, or compensate for different rooms/speaker cabinets. Mid Boost: Adds a thickening boost that drives the power amp with full range signal. This is foot switchable via ftsw jack on both models.
Bright Switch: Adds brightness and boosts the preamp gain above 1KHz. This is a useful switch to compensate for different types of pickups.
Master: Controls the overall volume of the amplifier. The 2PAK has the clean/dirty on the concentric knobs. The inner knob is master for both channels and the outer knob is master for the dirty channel only.
Channel Selector: This panel switch selects between clean and dirty channels. The up position is the clean (inner knob) channel, and the down position is the dirty (outer knob) channel. This function along with the midboost is accessed via the footswitch jack.
The clean channel (inner) master will affect the dirty channel as well. Consider this control as a global master volume. Set the volume balance with the outer knob and use the inner knob to regulate both channels.
Treble: Controls the high frequency response of the amplifier at a frequency of 2 KHz. Adjust to taste with your particular guitar and pickups
Footswitch Jack: Use any two button footswitch. Mid boost and Channel select are foot switchable.
Mid: controls the midrange response at 900 Hz. This control “fills” the sound or “scoops” it for more clarity and sizzle TIP #2: Start by setting the gain and master levels for Ch 1 (clean). Switch to Ch 2 (dirty) and set the gain and master levels with the outer controls. Switch back and forth and adjust the outer (dirty) master to balance the two channels. At this point the volume balance between channels has been set. You are now able to control the overall volume with the inner master (clean), while maintaining the channel balance. 6
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Rear Panel - Both Models Power Switch: Turns the amplifier on and off. The Khan Pak does not require a standby switch for safe operation. AC Inlet: The line votage is clearly marked on the unit. Use a standard IEC cable (supplied) to connect to the correct power source. Never defeat the ground terminal on the AC cable. Line out: Speaker compensated balanced 1/4” TRS line out. Connect to your DI, mixer or recorder input. The line out has been carefully filtered to give the response of a classic rock guitar speaker. Some additional post EQ can be used to “sweeten” the sound further. Speaker Output: Connect your speaker cabinet here. The jack is marked with a red nut for easy identification. Always match the impedance between the amp/cabinet. A tube amp requires the correct match to operate properly, unlike SS amplifiers that vary their power with load impedance.
FX Loop Send/Return: The fully buffered loop has been designed to work with pedal devices. Reverbs and delays will sound much cleaner when placed in the loop. Gain/drive pedals should be used in front of the amp. Modulation effects could be placed in either pre or post location. Impedance Switch: 16 and 8 ohm operation is supported. Always match the impedance with a tube amplifier as this assures the maximum power transfer. The Pak can tolerate a slight mismatch, but the Output transformer has been carefully designed for the 6AQ5 output tubes. Always match the impedance between amplifier and loudspeaker. Fan Speed Switch: Located on the bottom panel. This switch will select high/low speed operation. Under normal conditions, the PAK will not overheat when using the fan in the low position. For extreme duty use, use the high speed setting. In either case, adequate ventilation is required.
Output Power Switch: Switches from 18 watt to 10 watt operation. This is achieved by reducing the plate voltage on the pentode output stage. The essence of the tone is maintained in each setting.
TIP #3 – Silent Use: When using the “silent” feature, disconnect speaker and set impedance to 8 ohms. It is very important to do this as the output tubes need the proper match to the 8 ohm internal load. The line out can then be used to drive your recording software and monitor through your studio speakers. 8
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Tech Specs: Input Impedance: 1 Megohms Gain: 72 dB clean/92 dB dirty Tube Complement: PAK - (2) ECC83/12AX7 (2) 6AQ5/6005W 2PAK – (3) ECC83/12AX7 (2) 6AQ5/6005W Power Output: 18/10 watts @ 5% THD. 16 or 8 ohms. Line out: -10dB level @ full output. Electronically balanced and speaker compensated. Effects Loop: -20dB level for use with pedals. Treble: 14 dB range at 2 Khz Mid: 10 dB range at 900Hz Bass: 14 dB range at 100Hz Presence: 8 dB lift starting at 2.5Khz and above Voltages: 100V, 120V, 220V, 240V 50/60 Hz Power consumption: 85 Watts maximum Dimensions: 9” x 6.75” x 2.5” Weight: 6.5 lbs
About the 6AQ5 Vacuum Tube Used extensively in TVs and radios throughout the 50’s and 60’s, the 6AQ5 miniature 7 pin power pentode is equivalent in specification to the 6V6. The tube has been utilized in its original intent where compactness and power are paramount. A full 18 watts of clean power is developed with a power supply of well under 400VDC. There are literally thousands of NOS 6AQ5’s on the market today, so availability is not a problem. Great tone and longevity are qualities that are inherent in NOS tubes. Regardless, a spare set of NOS GE military spec 6AQ5 tubes are included with each amplifier, providing you assurance at no extra cost. Enoy a classic vacuum tube design, brought to you in the most compact and innovative format yet.
Warranty Each unit is hand built and sound tested by KHAN. Designed and manufactured in the USA with premium components. All KHAN products carry a 3 year warranty to be free of defects from materials and workmanship. Tubes are covered under a 90 day warranty.
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