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Project
Polaris
th
USER MANUAL – May 10
2021
WWW.GARAGE1217.COM
(R1.2 PCB ONLY)
WARNING:
Although Project Polaris runs at a generally safe 48VDC, Injury from improper assembly is quite possible. The main danger
comes from installing the polarized capacitors backwards as they can only be installed in one direction much like a battery
(more detail on capacitor installation comes later in this manual) If a capacitor is installed backwards, it may burst resulti ng
in burns or eye injury. If you are not experienced in electronics or electronic kit assembly, it would be wise to have an
experienced electronics person review your work before powering the unit on. Upon first power up, wear eye
protection and be wary of any burning smells or electrical noises such as loud pops or buzzes
If using low impedance headphones with power ratings of 300mW or lower, there is a chance you could blow out the drivers
if left playing at high levels – unattended. At high power levels an SPL of over 120dB may be reached in efficient
headphones which is harmful to your hearing. Project Polaris is a very high powered headphone amplifier – use caution and
common sense. High output headphone amplifiers like Polaris are designed to power very demanding headphones or
provide all the headroom you could want with more efficient designs, not to see if you can get your jawbone to rattle.
GARAGE1217.COM IS NOT RESPONSIBLE OR LIABLE FOR INJURY, PROPERTY LOSS OR DAMAGE AS THE RESULT OF ASSEMBLY OR USE OF THIS "DO IT YOURSELF" KIT. POLARIS IS
CONSIDERED A HOBBY LEVEL PRODUCT. IT CONTAINS NO ELECTRICAL CERTIFICATIONS AND IS NOT ADVERTISED AS SUCH. USE AT YOUR OWN RIS K.

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Summary of Contents for Polaris Project

  • Page 1 GARAGE1217.COM IS NOT RESPONSIBLE OR LIABLE FOR INJURY, PROPERTY LOSS OR DAMAGE AS THE RESULT OF ASSEMBLY OR USE OF THIS “DO IT YOURSELF” KIT. POLARIS IS...
  • Page 2: Specifications

    - When the protection circuit activates and de-activates, a slight click may occur - If load testing Project Polaris, it is not recommended to attach a dummy load with a value below 15 Ω when testing at full output power for a long periods. Heatsinks and the output devices at the bottom will become quite hot during testing.
  • Page 3 Proper soldering is key to a quality final product. If you are new to soldering, here are some basic guidelines to follow. It would be wise to buy a copper project board and a few cheap resistors or other components to practice with before starting this project.
  • Page 4 Project Project Polaris Polaris Bottom Chassis Prep / Final Chassis Assembly: - ONCE THE PCB HAS BEEN ASSEMBLED, ASSEMBLE EACH OF THE 4 RUBBER FEET AS ALLEN BOLT + SET IT ONTO THE FOUR THREADS SHOWN, ATTACHING EACH FOOT TO THE GRAY...
  • Page 5: Assembly Guide

    Project Polaris Assembly Guide POWER SWITCH POWER RCA LINE-OUT RCA LINE-IN JACK ADJUSTABLE INPUT ATTENUATION JUMPERS POWER LED (SOCKETED 3MM LED FOR BANDWIDTH ADJUSTMENT EASY COLOR CHANGE) LED ON/OFF LED BRIGHTNESS TRIMMER GAIN SELECTION OUTPUT RESISTANCE JUMPERS PROTECTION CIRCUIT LED ¼”...
  • Page 6 Project Project Polaris Polaris STEP 1: POPULATE ALL SMALL COMPONENTS ON THE BOARD SUCH AS RESISTORS, RIGHT ANGLE JUMPERS, DIODES AND SMALL CAPACITORS. THROUGHOUT YOUR BUILD, ALWAYS INSTALL THE SMALLER PARTS FIRST, WORKING YOUR WAY UP TO THE LARGER COMPONENTS...
  • Page 7 Project Project Polaris Polaris POLARIZED CAPACITORS MUST BE INSTALLED IN THE STEP 2: POPULATE ALL MID SIZE COMPONENTS SUCH AS RCA’S, CORRECT DIRECTION (WILL HAVE A STRIPE DOWN THE SIDE POWER COMPONENTS, SMALL CAPACITORS, RELAY, TRIMMER DESIGNATING POLARITY) INSTALL THIS STRIPE FACING THE...
  • Page 8 Project Project Polaris Polaris VOLPOT GROUNDING GROUNDING THE VOLUME POTENTIOMETER IS REQUIRED AS WITHOUT IT, THE AMPLIFIER MAY BE SUBJECTED TO NOISE / INTERFERENCE. THE IMAGES ARE OF THE PREVIOUS GENERATION SUNRISE, HOWEVER THE GROUNDING PRINCIPAL IS EXACTLY THE SAME.
  • Page 9 Project Project Polaris Polaris STEP 3: POPULATE ALL LARGE SIZE COMPONENTS SUCH AS LARGE CAPACITORS, TO263 DIODE AND HEADPHONE JACK POSITION THE TO263 DIODE EXACTLY AS SHOWN...
  • Page 10 Project Project Polaris Polaris COMPLETED POLARIS LAYOUT AND PHOTO:...
  • Page 11 Project Polaris Polaris Project Polaris has several jumpers settings to customize the amp the way you would like it. Below gives you the details on what these jumper settings do! INPUT ATTENUATION CAN BE CHANGED VIA THE JUMPER TABS AT THE BACK, RIGHT HAND CORNER OF THE AMPLIFIER.
  • Page 12 Project Polaris Resistors Capacitors R1 = SM 100K X 1 C1 = 100nF 100V X 1 R2 = SM 470K X 1 C2 = 22uF 63V X 1 R3 = SM 10K X 1 C3 = 2200uF 50V X 2...