Finally I was able to pick up an APM for myself, it's hard finding one here in India officially. The market was mostly filled with grey market scalpers for the last couple of months.
Here are a few Measurements for anyone who wants to use them as a reference.
I by no means have done extensive testing and I haven't done thousands of tests, I don't have the time for that.
The APM was measured exactly at 90.164dB @1KHz and the RR1 was at 90.151dB.
APM was powered by the Violectric V200 going into the APx515 and the RR1 was plugged into the 252S. APM was measured with the NC and all other trick DSP on, RR1 was in full analog mode, obviously. The graphs are uncompensated and unsmoothed, absolutely no filtering was applied to either graphs. The Measurements were done on the G.R.A.S KEMAR 45BB-14. The RR1 used in this test was a relatively older unit (Manufactured in 2018)
Please Note - Ideal seating conditions weren't taken into account here. These were just preliminary measurements for both. The APM %THD ratio continues to stay below 1% throughout the range as high as 115dB thanks to the DSP. Graphs can be made to look nice with ideal seating and smoothing which doesn't work out in the real world hence such preliminary measurements. For anything more detail oriented it's best if you look for the measurements from other reputable sources who do this as an everyday job.
Overall, I really like the APMs but I'd rather use my Bose 700 which is easier to throw around while welding and while I'm working on my old motorcycles and cars.
Here are a few Measurements for anyone who wants to use them as a reference.
I by no means have done extensive testing and I haven't done thousands of tests, I don't have the time for that.
The APM was measured exactly at 90.164dB @1KHz and the RR1 was at 90.151dB.
APM was powered by the Violectric V200 going into the APx515 and the RR1 was plugged into the 252S. APM was measured with the NC and all other trick DSP on, RR1 was in full analog mode, obviously. The graphs are uncompensated and unsmoothed, absolutely no filtering was applied to either graphs. The Measurements were done on the G.R.A.S KEMAR 45BB-14. The RR1 used in this test was a relatively older unit (Manufactured in 2018)
Please Note - Ideal seating conditions weren't taken into account here. These were just preliminary measurements for both. The APM %THD ratio continues to stay below 1% throughout the range as high as 115dB thanks to the DSP. Graphs can be made to look nice with ideal seating and smoothing which doesn't work out in the real world hence such preliminary measurements. For anything more detail oriented it's best if you look for the measurements from other reputable sources who do this as an everyday job.
Overall, I really like the APMs but I'd rather use my Bose 700 which is easier to throw around while welding and while I'm working on my old motorcycles and cars.
Last edited:
