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The Phoenix does no AC regeneration, or lower the motor voltage after startup like the SDS. More noise.
Thought this question was asked prior and it was concluded
that the Phoenix does in fact lower the voltage .
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- 36 posts total
SDS is better as once you set a speed it is locked to that. Phoenix corrects speed so it would be constantly changing which could be audible. This is a common misconception and is actual the opposite of reality. The SDS does not change its output frequency once it is manually set so the speed of the motor will remain the same, however the platter speed will constantly increase 0.2-0.4 RPM as the belt and bearing warm up over the first 30-45 minutes of play and it is audible to many listeners. The Falcon/Eagle PSU does not correct "constantly"; there is a window of error that the PSU responds to (only if connected to the tachometer). When the platter speed drifts outside the window, the PSU applies extremely small corrections** evenly over the next revolution to keep the platter on speed. The correction is not audible. Once the table speed is stable, it is not uncommon to see 20-50 revs without correction, but if the PSU did not correct, the speed error would build up and it would be audible. Of course, if feedback is something you are opposed to, then don't connect the cable between the tach and PSU and adjust the speed manually. ** The SDS uses a PLL circuit and the output is constantly wobbling a minute amount. The amount of correction the Falcon/Eagle PSU applies is smaller than the constant wobbling of the SDS: https://www.youtube.com/watch?v=QOs7oB8N9Zs&nohtml5=False |
The Phoenix does no AC regeneration, or lower the motor voltage after startup like the SDS. More noise. This of course is also incorrect. The Falcon/Eagle are AC regenerative power supplies and they use DDS technology to create AC regeneration which has much lower distortion and noise as well as being hundreds of times more accurate than the PLL circuit the SDS uses (see link above). The Eagle/Falcon also has reduced voltage output which is front panel programmable. The Eagle is capable of 230VAC output so it works with tables worldwide. It will also work with 50Hz motors where the SDS does not. The Eagle/Falcon works with the RoadRunner tachometer to automatically correct for long term drift which the SDS cannot. The Eagle also delivers more output power than the SDS: https://www.youtube.com/watch?v=tt9AuTg3QXA |
- 36 posts total