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Here are the white noise ( and dual-tone signals (18 kHz and 20 kHz) for the 90 kHz band. Analog output

Good idea, tomorrow I will try to update the measurements of the filter attenuation!

Hi, This is my second attempt at CD player measurements, based on the knowledge I gained from ASR. Many thanks to the members who contributed to developing this part of the reviews, especially @NTTY, who shared their measured files with me. Some of these files were used in this review. The...

No RIAA correction was applied to these measurements. 100 Hz - best THD+N for 12 mV input (2,5 V out) 1000 Hz - best THD+N for 41 mV input (2,3 V out) 10000 Hz - best THD+N for 218 mV input (2,6 V out)

Sure, I'll do it on Monday

Hi, This is a measurement of the phono preamp Behringer PP400. It is a simple preamp without any switches and costs around US$25-30. For measurements, I grounded the PP400 through its output to the analyser. Using a dedicated screw caused significant distortion from the power supply. Below...

@CedarX Above, diagrams explaining the ‘drop’ in distortion above 6 kHz.

That's a good point. I created this test loop only for the 22k band, which corresponds to our hearing range, and of course this affects the results. Below is a comparison of this measurement using the 22k and 90k bandwidths. The curve representing 16k is in a completely different place. Here...

Hi, this is a review of digital to analog converter which I bought on a local (Polish) e-commerce platform. Since it is a no-name company, I called it $5 DAC which also indicates its price. You can easily find similar DACs on Amazon or Aliexpress but the price can vary from $5 to $20. The...

@NTTY you were right. The distortion was added by the “Adjust Level” function in WMP. Here are the measurements for the coaxial and analog output: COAXIAL OUT ANALOG OUT (sorry for FFT in Vrms)

Hi @NTTY, many thanks for the advice. I'll analyze it and get back with the results! Thanks!

Hi, How do you determine the fit to the RIAA curve? Do you use any reference curve to which you compare the frequency response from the phono preamp?

Do you think the same situation occurs when converting RCA to XLR? I wanted to connect a phono preamp with unbalanced output to an active speaker with balanced input. The reason for the conversion is the length of the cable, as the speakers are quite far from the source and require 10m of cable.

MODERATOR NOTE: The below test is faulty and incorrect due to a faulty test CD that was used in the testing. A new test was completed and a link to this new review is provided in the last post in this thread. We are leaving this thread up as even in failure some valuable information and...

As you said, the low level was related to the +4dBu setting. Thanks to you guys for pointing this out. Here is a measurement with different output settings. I reinstalled the RME drivers, which probably had a positive effect. Now the THD+N is around 0.0015% which is close to the specification...

Hi, here is my very first review, of the audio interface. The device under test was interface RME Fireface UC and measures were conducted on Audio Precision APx525 analyzer. Based on the results I started to worry that something may be wrong with the measured interface. Other RME product...

Great review. I would like to ask about your RMS Level measurement. Why you always use a 5 watts output signal when measuring amplifiers? It is related to any standards, or it's just level which you choose to keep one measurement procedure for all amplifiers?