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Project
Project
Polaris
Polaris
Specifications
Solid state output stage with JFET input stage
Power consumption: (0.03A cont, 0.25A peak)
Power supply: 48VDC
Input Resistance: 11k or 21k depending on gain setting
Gain: 12.5X / 7.5X / 4.5X without Attenuation Module. With Module, reduce by ½.
Max Output voltage: 16Vrms at 300 Ohm
Max RCA Output voltage: 2.9V
Output Resistance: Selectable 0.1, 35 or 120Ohm
Frequency range (High BW - 30 Ohm load) -3dB: 2Hz-290kHz
Frequency range (High BW - 30 Ohm load) -.5dB: 6Hz-100kHz
Dynamic Range 108dB
Noise level -109dB
Crosstalk: -98dB
THD: > 0.045%
Phase shift: 180 (inverting amplifier) on wide BW and 30 Ohm load 15Hz - 28kHz (+/- 10)
Slewrate: +16V/us, -20V/us
Suitable for: 16-600ohm Headphones
Polaris Operational Guide
Normal Operation and Notes:
- Plug in the amplifier and then the power supply (in that order). Make sure the headphone jack and
input RCA's are secure. Once the amplifier is turned to the ON position, the front red LED will
illuminate red for approximately 3 seconds. This indicates the protection circuit is active while the
amplifier is warming up.
- 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. The amplifier will go into thermal protection when chip
temperatures of 150oC are reached. Under normal conditions (playing music) even when driving low
impedance loads, the output devices will get slightly warm at best.
- Some channel imbalance below 9 o'clock on the volume potentiometer is normal. We recommend you
adjust your source output levels, Attenuation module and gain module to keep the volpot above this
point
- Cell phones or radio frequency devices in close proximity to Project Polaris may create noise that is
audible when listening to music (generally clicks or digital noises)
- Clean your Project Polaris with a microfiber cloth and plastic cleaner (dusting with a microfiber cloth is
generally all that is required). Compressed air is also great option for dust.
OUTPUT RESISTANCE
OUTPUT
POWER
.1R
35R
INTO:
16Ω
600mW
590mW
32Ω
1.4W
1.2W
64Ω
2.4W
1.5W
120Ω
1.8W
1.1W
300Ω
765mW
600mW
600Ω
390mW
360mW
120R
180mW
290mW
450mW
480mW
390mW
270mW
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