Sonic Frontiers Sonic Frontiers Power 1 Operating Manual Download | Manualshive

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Operating Manual for the Sonic Frontiers Power 1 Stereo Amplifier

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Summary of Contents for Sonic Frontiers Power 1

Page 1: ...Operating Manual for the Sonic Frontiers Power 1 Stereo Amplifier ...

Page 2: ...ams 3 Installing the Tubes 5 Controls Functions and Connections 7 Biasing of the Power Tubes 9 Adjustment for Load Impedance 10 Care and Maintenance 12 Troubleshooting 13 Warranty 14 Specifications 15 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 shock to...

Page 3: ...on of 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 If after your inspection of the contents there is a discrepancy contact your dealer or Sonic Frontiers immediately Removing the Tube Cover To remove the cover loosen and remove the 4 screws installed from the bottom 2 per side Lift the cover straight up and awa...

Page 4: ...g the Tubes and Biasing of the Power Tubes a must read for further clarification 4 Replace the tube cover as described in the Unpacking section If the tube cover is not used it is 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 5 Connect your preamplifier s left and right balance...

Page 5: ...icate 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 tub...

Page 6: ...el Input Selector Switches J Left and Right Channel Balanced XLR Inputs K Left and Right Channel Single Ended RCA Inverting Inputs L Left and Right Channel Single Ended RCA Non Inverting Inputs M Left and Right Channel Ground Posts N Left and Right Channel Loudspeaker Binding Posts This drawing is referred to as the Front Panel within the instructional text This drawing is referred to as the Rear ...

Page 7: ...responding sockets also labeled on the amplifier s top surface See Reference Diagrams for further clarification Insert each tube in the corresponding socket Starting with the 9 pin small signal tubes the 6922s 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 pi...

Page 8: ...e or the tube boxes to the corresponding markings printed on the tube top V4 V5 and V9 V10 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 it is firmly seated Note the locating center key and notch for proper alignment of tube and socket ...

Page 9: ... not be biased up in this STANDBY mode E Power LED When this LED is off so is the amplifier When the LED is glowing red both channels are Muted controlled by the Input Selector Switches I When 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 but in MUTE mode Green Red Orange i...

Page 10: ...t is 180 out of phase relative to the original signal and correction for this configura Inverting Inputs tion is desired This input on the Power 1 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 L Left and Right Channel These inputs accept an input signal from a single ended output of a preamp o...

Page 11: ... not optimal for the tube The LED should not be glowing at all for the proper operating bias To properly bias the tubes is a simple procedure For the power tubes on the left V4 V5 insert the biasing driver into the slot head of the bias adjustment control and turn the driver to adjust the control counterclockwise so the LED is green Turn the adjustment back clockwise until the LED begins to dim At...

Page 12: ...he amplifier can be set to handle 4 or 8 ohm loads Some experimenting of this setting may be required for speakers which vary considerably in impedance across a frequency range To change the output setting have your Sonic Frontiers dealer follow these steps 1 Unplug all connections to the power amplifier namely the AC power supply cord and wait a minimum of 20 minutes for all power supplies to dis...

Page 13: ...eplace the Transformer cover and screws tightening the front top 3 countersunk screws first then all the rest REAR OF THE AMPLIFIER Left Channel Shown REAR OF THE AMPLIFIER Left Channel Shown Adjustment for Speaker Load Impedance Cont d The final connections should resemble these diagrams ...

Page 14: ... adequate operating temperatures 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 than 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...

Page 15: ...ower 1 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 1 is on and outputting a signal Safety Instructions 1 Water 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 a...

Page 16: ...e defect is due to the product being tampered with modified or repaired by anyone other than Sonic Frontiers Inc or an authorized Sonic Frontiers repair depot 3 Warranty 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 ...

Page 17: ...z to 77 kHz 1 watt 3 dB points Input Sensitivity 0 94V RMS balanced for 55 watt output 0 94V RMS single ended inverting or non inverting Input Impedance 200K ohms balanced 100K ohms single ended inverting or non inverting Damping Factor 35 determined using the IHF method from RS 490 Output Impedance 0 28 ohms at 1 kHz Negative Voltage Feedback 20 dB Hum and Noise approximately 300 microvolts of wi...

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