Sonic Impact Technologies Power 2 User's Manual
Contents
1. Warranty Disclaimer of Liability Under no circumstances does Sonic Frontiers Inc assume liability or responsibility for injury or damages sustained in the use or operation of this equipment or for damages to any other equipment connected to it Sonic Frontiers Inc reserves the right to make design changes or improvements without the obligation to revise prior versions All speci fications are subject to change without notice Limited Five Year Warranty Sonic Frontiers Inc warrants to the purchaser that each amplifier is free of manufactur ing defects for a period of five 5 years from the date of purchase This five 5 year lim ited non transferable warranty excludes all vacuum tubes which we warrant for a period of twelve 12 months To receive this warranty the original purchaser must complete and mail to Sonic Frontiers within thirty 30 days from the date of purchase the enclosed W arranty Registration Card Sonic Frontiers Inc will then validate the warranty to the Original purchaser This warranty is subject to the following conditions and limitations 1 W arranty applies only to the original purchaser 2 This warranty is void and inapplicable if the product has been handled other than in accordance with the instructions in this O wner s Manual abused or misused damaged by accident or neglect or in being transported or the defect is due to the product being tampered with modified or repaired by anyone other th2. Note This position is purpose ly positioned at 12 o clock so it can be easily determined when access is obscured The front panel Power LED will also turn red if this switch has selected an input which has no connection If any input selector switch is in MUTE and the other is not the Power LED will be a Red amp Green colour at the same time These inputs accept an XLR balanced connection from the preamp s left and right balanced outputs Connections should be made left channel to left channel right channel to right N ote The XLR pin configurations are as follows Pin 1 Ground Pin 2 Positive Pin 3 Negative 2 1 View from front of connector 9 These inputs accept an input signal from a single ended output of a preamp or source that is 180 out of phase relative to the original signal and correction for this configura tion is desired The input on the Power 2 does Invert the phase of the output signal rela tive to the input signal Connections should be made left channel to left channel right channel to right These inputs accept an input signal from a single ended output of a preamp or source that is in absolute phase or are used if itis desired to maintain the phase of the signal from the preamp Simply explained this input does not invert the phase of the output sig nal relative to its input Connections should be made left channel to left channel right channel to right This post is offered for use when a ground
3. ON W hen depressed ON the amplifier will be placed in STAN DBY mode and will not be operational indicated by the red standby LED assuming Power ON In this mode a small amount of current will remain flowing through the tubes this reduces power consumption and extends tube life during periodic short term non use periods i e during a listening session when interruptions occur or a short time prior to a listening session so the amplifier is warm and ready This mode also will keep optimal warm up times of the tubes shorter For periods between listening sessions extending over a 12 hour period itis recommended that the Power 2 is turned off via the Power Switch W hen this LED is off so is the amplifier W hen the LED is glowing red both chnnels are M uted controlled by the Input Selector Switches I W hen the LED is green the amplifier is receiving power and both inputs are selected the amplifier is ready for operation Green Power LED indicates ON Red Power LED indicates ON butin MUTE mode Green Red Orange indicates one channel is in MUTE and one channel is selected W hen this LED is off so is the amplifier W hen the LED is glowing red this indicates the amplifier is in Standby mode controlled by the Standby Switch W hen the LED is green the amplifier is in operate mode Refer to Reference Diagrams Plug the detachable Power Cord into this socket The Power 2 amplifier is configured for the operating voltages in which
4. connection is required i e when amplifier s function is being tested by a technician Ithas no use for day to day audio related Operation These posts are used to connect the amplifiers to the speakers positive terminal to posi tive terminal negative terminal to negative terminal from the right posts to the right speaker and left posts to the left speaker WARNING AMPLIFIER OUTPUT IS BALANCED CARE MUST BE TAKEN TO ENSURE THE AMPLIFIER IS NOT CONNECTED TO LOUDSPEAKERS CERTAIN SUBWOOFERS OR LOUDSPEAKER SWITCH BOXES THAT HAVE A COMMON GROUND CONSULT YOUR DEALER OR SONIC FRONTIERS DIRECTLY FOR FURTHER CLARIFICATION REGARDING CONNECTIONS TO ITEMS IN THESE UNIQUE CASES DAMAGE TO THE AMPLIFIER OR CONNECTED EQUIPMENT WILL NOT BE COVERED UNDER WARRANTY IF THESE WARNINGS ARE IGNORED Adjustment for Load Impedance AN Note Adjustment for load impedance should only be done by an authorized Sonic Frontiers dealer distributor or service technician Any damage to the amplifier as a result of a person s not authorized by Sonic Frontiers will not be covered under warranty AN Warning Dangerous voltages exist within this amplifier The nominal speaker load of the amplifier was factory set to the impedance designated on the Voltage Impedance sticker on the back of the chassis and shipping carton In the event that you should require different impedance operation the amplifier can be set to handle 2 4 or 8 ohm loads Some experimenting o
5. Operating Manual for the Sonic Frontiers Power 2 Stereo Amplifier Operating Manual for the Sonic Frontiers Power 2 Stereo Amplifier We at Sonic Frontiers hope you will derive many years of listening pleasure with your new Power 2 Amplifier This O perating Manual contains important information regard ing the operation and care of this Amplifier Be sure to read this manual carefully and follow these Instructions in order to keep them performing and sounding their best Please contact Sonic Frontiers if you have any questions a Customer Service Represen tative will be pleased to assist you Contents UO FATTO LUI tector tnceusnce reese abate arta ues Stettler teens ag ha OT fal Cock i 0 6 etree eee eran A nee oor een ee Ene nena Cnr ae Reference DIA Gras eenean oE A mstalino We TUDES noires ricreca ana Biasing of the Power TUDES ccccscsescsseeseceseeeeeeeeeeeeeeeeeeeetaeetanss Controls Functions and CONNMECTONS cccsesesssecesseeesseesenaeees Adjustment for Load ImpedanCe ssssssrsresrernrrrrrrrrerrrrerrerrerene Careand Mamnenan E erene n a E WOUND ESIC UI oniinn a eon Wane tpsaaaanesahantiane Warnanen tenihaassunsatatadaiceaiud ae ada amine nas nso aasrautatas SCC MC AO NS i a aie ieinanitantada tena etic This symbol is intended to alert the user to the presence of uninsulated dangerous voltage within the product s enclosure that may be of sufficient magnitude to constitute a risk of electric shoc
6. Power Switch Standby Switch Power LED Green Power Red Mute O range Red Green One Channel in Mute Standby LED Green O perate Red Standby Detachable IEC Power Cord Socket Fuse Location Leftand Right Channel Input Selector Switches Leftand Right Channel Balanced XLR Inputs Left and Right Channel Single Ended RCA Inverting Inputs Left and Right Channel Single Ended RCA Non Inverting Inputs Left and Right Channel Ground Posts Left and Right Channel Loudspeaker Binding Posts Installing the Tubes Be sure the amplifier is O FF Power Switch O ut before installing any tubes or when any of the tube sockets are empty W earing the cotton gloves provided with the amplifier when handling tubes will prevent skin oils from depositing on the glass surface of the tubes The oils could cause the tubes to become gassy and fail prematurely Inspecting the tube boxes that come with the amplifier you will notice that the boxes and power tubes themselves are labeled to corresponding sockets also labeled on the tube top surface See Reference Diagrams for further clarification Insert each tube in the cor responding socket Starting with the 9 pin small signal tubes the 6922s and 5687s pay extra attention to the tube pins and socket holes for these tubes You will notice an open space where an imaginary tenth pin or hole would be This is for proper tube alignment Be sure pins are in line with holes when installing
7. an Sonic Frontiers Inc or an authorized Sonic Frontiers repair depot 3 W arranty does not cover normal maintenance 4 Sonic Frontiers Inc shall not be responsible in any way for consequential or indirect damages or liabilities resulting from the use and operation of the product covered herein or resulting from any breach of this warranty or any implied warranty relating to said product During this period Sonic Frontiers Inc will repair or replace any defective components free of charge A Return Authorization Number RA Number is required before any product is returned to our factory for any reason This number must be visible on the exterior of the shipping containers for Sonic Frontiers to accept the return Units shipped to us without a Return Authorization Number or without a visible RA N umber on the exterior of the shipping containers will be returned to the sender freight collect Units to be repaired by Sonic Frontiers Inc must be sent shipping and insurance pre paid by the original purchaser in the original packing material A returned product should be accompanied by a written description of the defect Repaired units will be returned by Sonic Frontiers Inc shipping and insurance prepaid All other warranties or conditions either written or implied are void N ote In foreign markets anywhere outside of Canada and the USA the warranty is sup plied by the authorized International Distributor Exact terms and c
8. ce Diagrams the instructional text x Jf 55 T f x Ly AQ _ 2o a S i i ones ones This drawing is referred to WD 3 2 as the Tube Top within LT iL O sx 3 9 S X LV LYS EEE See Tube locations V1 to V3 and LV1 to LV3 indicate placement for the six 6922 tubes Tube locations V4 and LV4 indicate placement for the two 5687 tubes Locations V5 to V8 and LV5 to LV8 indicate placement for the 6550C KT88 power tubes A Holes on the Tube Top labeled A are LED indicators for the bias of the power tubes situated nearest B Holes labeled B are the location of the bias controls The bias controls adjust the bias of the tube which they are joined to by the lines Direction arrows around the controls indicate the rotation of the control to INCREASE the bias of the power tubes This drawing is referred to as the Front Panel within the instructional text This drawing is referred to as the Rear Panel within the instructional text 11 7V460Hz FUSE 650 VA MAXIMUM SLOVY BLO VOLT 4CEAMPEDSNCE SERIAL NO EL ROT EC TION WITH O4E TYPE OND RATNG FUGE CAUTION A BEFORE CHANG NG FUGE OND TUBE SHOCK HAZARD DO NOTO PEN EONO FRONTIERS INO XLR BAL ns W a S T ee E a ________ o EESE EETA nn SY Easaaanaanaaaaaaanaananananaaananaannsanasaasaaasaaasaaaaaaaa N s hg Aasaa Ye EO EE ee ee E e
9. ed N ote the locating center key and notch for proper alignment of tube and socket A cutaway of the tube top showing the location of the biasing controls below the tube top surface and the biasing driver Biasing of the Power Tubes Bias voltage applied to the grids of the power tubes in the output stage should be checked from time to time once a month to keep these tubes operating at the optimum operating point A properly biased power tube will have a longer happier life To check the bias of the 6550C KT88 tubes place the amplifier in mute with the power on and the amplifier in operate mode STAN DBY LED Green Power LED Red for MUTE Looking at the tube top take note of the power tube location and the bias LED below the surface of the chassis next to each tube Also note the printed line that leads to each power tube At the opposite end of this line is the bias adjustment for each power tube a small slotted metal shaft again located below the chassis surface See reference dia grams for further clarification If a bias LED is glowing red the tube is overbiased if a bias LED is glowing green the tube is underbiased both conditions cause undue wear and or are not optimal for the tube The LED should not be glowing atall for the proper operating bias To properly bias the tubes is a simple procedure For the power tubes on the left LV5 to LV8 insert the biasing driver into the slot head of the bias adjustment con
10. f this setting may be required for speakers which vary considerable in impedance across a frequency range To change the output setting have your Sonic Frontiers dealer follow these steps f 1 Unplug all connections to the power amplifier namely the AC power supply cord and waita minimum of 20 minutes for all power supplies to discharge 2 Place the amplifier on the rear handles so itis upright and the underside is exposed Using the Phillips screwdriver provided unscrew the bottom panel and remove The terminal block for the right channel in the right rear corner After removing the bottom cover locate the terminal block for the left channel in the left rear corner 3 Look for the terminal blocks under the transformer housings which looks like this AQMAMCN 10 nn Note the solder connections on the terminal block Under no circumstances should these connections be tampered with 11 4 Using the slot screwdriver provided with the amp deal with one connection ata time loosening off the tap screws of the first soade lug connection and tightening to the desired tap The final connections should resemble these renderings 8 Ohm Impedance Connections FRONT OF THE AMPLIFIER 4 Ohm Impedance Connections FRONT OF THE AMPLIFIER FRONT OF THE AMPLIFIER 5 Repeat for each channel 6 Ensure all 12 screws per terminal block are tightened so there is no chance of them vibrat
11. ing loose 7 Replace the bottom cover and all external connections The location of the screw which locks the tube cover in place Care and Maintenance Placement The amplifier must be placed on a hard flat surface with plenty of unobstructed space around the Power 2 to allow for free movement of air for proper cooling If the amplifier is to be placed on a carpeted floor a W ood Ceramic Concrete Marble tile or slab 18 x 22 or larger must be place under the Power 2 Amplifier If the amplifier is left unattended or is exposed near small children or pets it is recom mended that the tube cover be used Cooling of the tubes is not as effective with the cover on although it does allow for adequate operating temperatures To add the cover simply place the cage over the tube top The cover is locked through the tightening of the large screw heads on the sides located between the tube top and transformer case To remove the cover loosen screws that were Indicated for fastening The Power 2 s fas tening screw is spring loaded for release after it is loosened Then while applying a small amount of outward tension at the screw locations lift the cover straight up and away from the tubes If the tube cover is not used itis recommended that the tubes namely the 6550C KT88s are protected from settling dust in NON USE periods Dust settling on the tubes can cause heat impairment of the tubes Therefore when the amplifier
12. is NOTIN USE a cloth or dust cover should be used How do I know when to replace the tubes If the tubes lack power to drive your speakers are hard to bias or won t hold bias it could be time for replacements Power tubes generally wear faster then small signal tubes but how much faster depends on how often you run your system If you need help determining these factors or sourcing replacement tubes contact your Sonic Frontiers dealer Sonic Frontiers or The Parts Connection a division of Sonic Frontiers 1 800 769 0747 in the U S or Canada 905 829 5858 for elsewhere for further assistance Cleaning Sonic Frontiers recommends only a dry cloth be used to clean the Power 2 Amplifier Sonic Frontiers does not warranty damage done through liquids spilled on circuitry 12 Troubleshooting If at any time the amplifier should fail to work follow these steps 1 Check that all tubes are fully seated in correct sockets and all tube filaments are lit 2 Check all connections at the rear panel 3 Check that the amplifier is notin MUTE mode 4 Check that the proper input Is selected via the Selector Switch 5 Check that the amplifier is in POWERON mode and NOT in STAN DBY mode 6 Check other equipment and connections to that equipment in your system from speak ers to source 7 Check that no fuses are blown in all equipment and or breaker switches in the home If this checklist fails to be fruitful contact your dealer or S
13. k to persons This symbol is intended to alert the user to the presence of important Operating and maintenance servicing instructions in the literature accompa nying the appliance Sonic Frontiers Inc can be reached at 2790 Brighton Road Oakville Ontario Canada L6H 5T4 Tel 905 829 3838 Fax 905 829 3033 E Mail SFl sonicfrontiers com WWW http www sonicfrontiers com 10 96 SKU 56595 Unpacking At this point we can assume that you have successfully opened the box flaps and found this manual The box was designed to ensure the safe transport of the amplifier Sonic Frontiers strongly recommends the storage of the Power 2 box in a Safe dry place In the event that the amplifier may have to be shipped in the future the original box is the best means for the protection and safety of the Power 2 during transportation You may want to enlist a friend s help to remove the amplifier from the box the weight can make this awkward hint the back of the chassis is the heavy end Here is a chart listing what you will find in the box Packaged Items Tube Complement 8 6550C or KT88 6 6922 2 5687 Slot Screwdriver 1 Phillips Screwdriver 1 Biasing Tool 1 Power Cord 1 Pearl Tube Coolers 2 with O rings Cotton Gloves 1 pair Extra Fuse 2 Amplifier 1 Tube Cover 1 Warranty Card 1 O perating M anual 1 If after your inspection of the contents there is a discrepancy contact your dealer or Sonic Frontiers immedia
14. nd 110 120 VAC 60 Hz 220 240 VAC 580VA atrated output 650VA maximum and 375VA with no signal input 8 4 matched pair x 6550C KT88 power output 6 x 6922 Input driver 2 x 5687 high voltage driver 18 46 cm W x 22 56 cm D x 9 23 cm H 110 Ibs 50 kg net each unpacked Sonic Frontiers continually strives to improve their products specifications are Subject to change without notice
15. onditions may vary 14 Power O utput SM PTE Intermodulation Distortion Power Bandwidth 110 watt output Frequency Response Input Sensitivity for 110 watt output Input Impedance Damping Factor O utput Impedance N egative Voltage Feedback Hum and Noise Rise Time Slew Rate Power Requirements Tube Complement Dimensions W eight approx 15 Specifications N ote Power ratings based on a nominal power line input All specifications are made on the 8 ohm taps utilizing an 8 ohm load unless otherwise specified 110 watts continuous at 8 4 and 2 ohms from 20 Hz to 20 kHz with less than 1 total harmonic distortion terminated with rated load typically lt 0 5 110 watts 1 kHz both channels driven Actual power output available at clipping defined as lt 1 THD approximately 120 watts RMS lt 1 20 Hz to 20 kHz 110 watts output 15 Hz to 90 kHz 0 5 dB points 5 Hz to 110 kHz 3 dB points 5 Hz to 40 kHz 1 watt 0 5 dB points 2 Hz to 120 kHz 1 watt 3 dB points 1 25V RMS balanced for 110 watts output 1 25V RMS single ended inverting or non inverting 200K ohms balanced 100K ohms single ended inverting or non inverting gt 50 determined using the IHF method from RS 490 0 30 ohms at 1 kHz 16 dB approximately 400 microvolts of wideband unweighted noise the 8 ohm taps input muted 110 dB below a 110 watt output 3 0 microseconds 16 volts microseco
16. onic Frontiers directly Servicing If the amplifier ever requires servicing in or outside of the warranty limitations contact your Sonic Frontiers dealer or Sonic Frontiers directly Break in Time As with all audio electronic products the ultimate sonic character of the Power 2 will not be realized until and unless the unit receives a minimum of approximately 70 hours of signal break in time i e the Power 2 is on and outputting a signal Safety Instructions 1 W ater and Moisture This product should not be used near water To prevent fire or shock hazard do not expose this product to rain or moisture 2 Heat This product should be situated away from heat sources such as radiators heat registers stoves or other appliances which produce heat 3 Power Sources This product should be connected to an AC power source of the proper rated voltage The original shipping container will stipulate the AC voltage this unit can operate with correctly 4 Servicing Do not open this product for any reason No user serviceable parts inside Refer servicing to an authorized service technician 5 Non Use Periods The power cord of this product should be unplugged from the out let when left unused for an extended period of time 6 Do not remove the top or bottom covers while the unit is on or connected to an AC power source Cover screws could fall through the ventilation slots and cause electrical damage to the amplifier 13
17. tely Quick Setup At this point we urge you to read and understand this manual in its entirety But if you desire immediate action and have skill and or past experience with tube hardware fol low these steps 1 Place the amp on a hard flat surface that will not impede airflow under the amplifier s chassis carpeting or area rugs are NOT acceptable as hard surfaces 2 Ensure the Power 2 is in Mute mode these selector switches are on the rear of the chassis W hen disconnecting and connecting cable placing the amplifier in Mute is an excellent practice 3 Tube bias was set at the factory prior to shipment Tubes are also marked for their cor responding socket location Carefully inspect each and install appropriately Check Installing the Tubes and Biasing of the Power Tubes a must read for further clarification 4 Connect your preamplifier s left and right balanced or single ended outputs to the left and right inputs of the amplifier 5 Connect the speakers to the positive red and negative black output binding post Note It is not recommended to operate any tube amplifier without its speaker load connected 6 Select the input for use via the selector switch XLR Balanced Single Ended N on Inverting Single Ended Inverting 7 Power up your system turning the power amplifier on last ensuring that both green LEDs are on no Standby or Mute activation Allow 5 minutes of warm up before operation Referen
18. they are sold See shipping box or Voltage Impedance sticker on rear of the chassis for voltage settings If a different operating voltage is required please contact an authorized Sonic Frontiers dealer or the factory a i Lb rated between 110 120V or a 3 5 amp slo blo fuse for countries operating on a 220 240V supply REPLACEMENT FUSES MUST BE RATED WITH THE SAME SPECIFICATIONS AS THE ORIGINAL FUSE I Left and Right Channel Input Selector Switches J Leftand Right Channel Balanced XLR Inputs K Left and Right Channel Single Ended RCA Inverting Inputs L Left and Right Channel Single Ended RCA N on Inverting Inputs M Left and Right Channel Ground Posts N Left and Right Channel Loudspeaker Binding Posts AN Damage due to bypassing the fuse or due to replacement of a fuse of higher ratings will not be covered under the warranty To access the fuse insert the slotted screwdriver pushing to compress the internal spring and turn counterclockwise to unlock the housing The spring will then eject the fuse and the housing These switches must both be rotated to the desired position to select the desired input XLR Balanced RCA Single Ended N on Inverting or Inverting for normal operation In the MUTE position this control allows for BASING CONTROL of the power tubes and for safe cable swapping without shutting down the amplifier W hen both switches are in the MUTE position the front panel Power LED will turn RED
19. trol and turn the driver to adjust the contro counterclockwise so the LED is green Turn the adjustment back clockwise until the LED begins to dim At this point through careful adjustment continue slowly turning the bias control stopping the moment the LED goes out No light from the LED indicates a properly biased tube For the most accurate biasing the biasing controls should always be rotated from the LED emitting green to the LED emitting no light stopping immediately as soon as the LED emits no light Repeat procedure on the next tube until all tubes are properly biased For tubes on the right side of the amplifier V5 to V8 the biasing controls are opposite Turn the biasing controls clockwise initially to decrease bias so the LED is green and counterclockwise until the LED goes out Refer to the Tube Top diagram for direction Front Panel C Power Switch D Standby Switch E Power LED F Standby LED Rear Panel G Detachable Power Cord Socket H Fuse Location Controls Functions and Connections Refer to Reference Diagrams This switch provides control over the AC power from your wall outlet W hen O FF out position nothing on the amplifier is functional When ON depressed the amplifier will operate normally green power LED indicates ON Red Power LED indicates ON butin MUTE mode This switch when OFF out position will allow normal operation of the amplifier indicat ed by the green Standby LED assuming Power
20. tubes Gently rock the tube into the socket until the tube is firmly seated The 6922 tubes are inserted into sockets designated V1 to V3 and LV1 to LV3 The 5687 tubes are inserted into sockets V4 and LV4 N ote the larger space between two of the pins and holes for proper alignment of tube and socket AN DO NOT PLACE 6922 TUBES IN A 5687 SOCKET OR A 5687 TUBE IN A SOCKET DESIGNATED FOR A 6922 TUBE THIS COULD RESULT IN DAMAGE TO THE TUBE AMPUFIER OR BOTH THAT WOULD NOT BE COVERED UNDER WARRANTY The 5687 tube is designed to run very hot In its implementation in the Power 2 itis being used at 1 3 its ratings Even at this rating the 5687 still gets hot and therefore the 2 Pearl Tube coolers should be installed over the 5687 tubes The chassis has been designed with larger holes to accommodate these essential devices to keep these tubes comfortable and allow efficient operation Just slide the coolers over the already installed tubes and add the rubber O rings around the coolers to clamp them in place Hint Add O rings before tube cooler is slid down fully W hen installing the 6550C or KT88 power tubes match the numbers designated on the metal base of the tube or the tube boxes to the corresponding markings printed on the tube top V5 through V8 and LV5 through LV8 and be sure the center pin key locator is in alignment with the slot in the center of the socket Again push down the tube rocking gently until itis firmly seat
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