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Could it be a power supply issue ? I suppose Amir re-checked that... And this little thing probably is not smart enough to require a USB-PD-enabled power supply able to provide more than the usual +5 V (USB-PD can now reach up to 48 V !)

View from my office near Grenoble, France just a few seconds ago.

Hi All, A few weeks ago I attended a classical concert performed by a good orchestra (hr-Sinfonieorchester Frankfurt) and a talented young pianist, Jan Lisiecki. He played with ardour a full-size Steinway piano with its cover appropriately opened. I was at the eighth row from the scene, a bit...

If there is no way to make 2 systems sound the same (or very similar), especially headphones that do not depend on room or seating position, then do you deny the whole concept of fidelity ?

Would a multitone test with each frequency weighted to typical real music levels provide a better metric for distortion evaluation ? Maybe multiple weighting profiles could be used to provide different THD figures for rap (bass heavy), vocal or classical music.

Thank you so much to all for your kind support ! I intend to try first on an old AVR to experiment all I can do with that. My first objective is to get an analog constant line-level 'rec out' signal for whatever input I listen to. The AVR currently does not output anything when I use online...

Hi All, After channel decoding AVRs'internal DSPs send i2s signals to multiple discrete DACs that eventually drive the power amplifiers and/or pre-outs. Has anybody ever tried to extract these signals and feed them to external stand-alone DACs then to signal processors, additional...

Violin/viola/cello players all play 'harmonics'. That's the way they manage to play tones much higher than what is feasible by pressing the strings normally. The trick is to press a finger only very lightly on a string. I do not really now the theory but I suspect that this filters out most of...

I am not thinking, I'm just reading the results. These non linearities are perfectly explicit in the tables : Consider a signal made of two tones of equal amplitude at 40 and 50 Hz. With 0.2V at the input of the B&W sub you get almost the same amplification at the 2 frequencies (0.5dB...

Hello All, Looking at the tables I started to wonder if there are curves or figures that report the non-linear distortions of the spl vs input voltage response. If you look at the 50 hz column of results (where most devices perform best) , we usually observe that 1 dB change in the input...

Not so sure about it, but if you tell your avr/avp that you have no sub it will probably route the sub signal to the main speakers. Then connect the main speakers' pre-out to the subwoofers. One takes left, the other right. That only workks with dsp speakers that can manage the crossover...

To work around this problem, one can also use a 'master / slave' power strip. These things monitor the power consumption on the master's socket and power the slave sockets only if the master is working. The slaves do not work more than the master, so I think there is no issue with ethics and...

Eye candy to go along with ear candy : music !

Sorry to ask again, but how does that compare to the voltage SINAD when the amp is connected to a real speaker rather than a power resistor ? I can not imagine that a small measurement device with its much higher input impedance can modify the results more than the power hungry speakers. But it...

Manual FAQ extract : 'Q2: When choose certain functions via remote cotrol, the backlight of VU meter will also flash? A: This is original design and normal.'

Just had a look at the user manual. The 100 W limit really is a power limitation : '1. It is better not to connect VU3 to amplifiers whose actual output power is greater than 100W, or else VU meter may be damaged. 100W refers to the actual power output from amplifier to the speaker. For...

The 'peak' led might just be the electronics over voltage warning.

The power limit may also be a consequence of the max voltage the vu driver electronics can take. There certainly is an attenuator at the input to make the signal < 5V as I'd be surprised if the board used a voltage up-converter for its power supply, but I may be wrong.

Deaf people do not die of lack of music although I'm very sorry for them. That said, I'm almost certain that 90+ % of the readers of this forum feel that music is an absolute necessity in their lives. What I meant is that the value we give to things not necessary to sustain life is very much...

Technical questions... When Amir measures the sinad of an amplifier I suppose he connects it to power resistors and then analyzes the *voltage* with the Audio Precision APxxx. Amir measured that the sinad gets worse when the signal is routed through what should normally be just wires, and...