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Genelec 8240 diodes red/green while playing

fuzzyboy, muokattu 10 Vuodet sitten.

Genelec 8240 diodes red/green while playing

Youngling Viestejä: 19 Liittymispäivä: 3.10.2011 Viimeisimmät viestit
I picked up my genelecs just yesterday and they sound amazing :-)

However, when I got home today I noticed that while playing the diodes would occasionally start becoming red for a really short time (like a 5th of a second) and then go back to green. Sometimes they'll do this on and off things in irregular intervals for 3-4 minutes, then go back to constant green for a few minutes, then back to switching between red and green.

I'm using them at -60dB, so rather low. I can't hear any distinguishable sound degradation. Should I return them or could it be some irregular wiring or such?
1038, muokattu 10 Vuodet sitten.

Re: Genelec 8240 diodes red/green while playing

Jedi Master Viestejä: 340 Liittymispäivä: 6.4.2009 Viimeisimmät viestit
Hi Fuzzy,

The LED's also indicate clipped signal at the input, if the led's are flashing red when at a low volume, it will be the CD you are playing, it is a sad reflection on the state of modern recordings....
fuzzyboy, muokattu 10 Vuodet sitten.

Re: Genelec 8240 diodes red/green while playing

Youngling Viestejä: 19 Liittymispäivä: 3.10.2011 Viimeisimmät viestit
Hi Fuzzy,

The LED's also indicate clipped signal at the input, if the led's are flashing red when at a low volume, it will be the CD you are playing, it is a sad reflection on the state of modern recordings....


Well, the source isn't a CD, it's a computer (via USB). However the flashing has stopped since yesterday. I suspect the problem may be the electrical system / wiring in our house, which is fairly old.
viltsu, muokattu 10 Vuodet sitten.

Re: Genelec 8240 diodes red/green while playing

Youngling Viestejä: 4 Liittymispäivä: 19.5.2010 Viimeisimmät viestit

Well, the source isn't a CD, it's a computer (via USB). However the flashing has stopped since yesterday. I suspect the problem may be the electrical system / wiring in our house, which is fairly old.

He meant:

-audio file's waveform reaches -0,1 dBFS if inputted digitally

or

-AD-converter is overdriven by feeding it more than +7 dBu RMS voltage if inputted to analog connection. +7 dBu is common man terms about 1,6 volts. Many soundcards/DACs/optical disk players can output more than this i.e clip the 8240's input if levels are not adjusted.

So, yesterday you adjusted analog source levels/stopped listening maximally hot recorded hit-music-only -stuff? :mrgreen:
fuzzyboy, muokattu 10 Vuodet sitten.

Re: Genelec 8240 diodes red/green while playing

Youngling Viestejä: 19 Liittymispäivä: 3.10.2011 Viimeisimmät viestit

Well, the source isn't a CD, it's a computer (via USB). However the flashing has stopped since yesterday. I suspect the problem may be the electrical system / wiring in our house, which is fairly old.

He meant:

-audio file's waveform reaches -0,1 dBFS if inputted digitally



Input is digital, so I guess that's the case, but what is the cause? It also flashes when not playing anything.
viltsu, muokattu 10 Vuodet sitten.

Re: Genelec 8240 diodes red/green while playing

Youngling Viestejä: 4 Liittymispäivä: 19.5.2010 Viimeisimmät viestit

Input is digital, so I guess that's the case, but what is the cause? It also flashes when not playing anything.

Red led lights also when there is errors in digital audio data. What device exactly is feeding 8240's?

Some troubleshooting points to be shooted:

-Is it S/PDIF or AES/EBU -source?

-How long cable? Is it DIY?

-If long cable + S/PDIF source, are impedance levels 75/110 ohms matched?

-What sample frequency source uses? Try plain 44,1 or 48 kHz.

-Has that source ever before worked OK as AES/EBU or S/PDIF use?

-Try different digi-source or switch to analog connection.
fuzzyboy, muokattu 10 Vuodet sitten.

Re: Genelec 8240 diodes red/green while playing

Youngling Viestejä: 19 Liittymispäivä: 3.10.2011 Viimeisimmät viestit

Input is digital, so I guess that's the case, but what is the cause? It also flashes when not playing anything.

Red led lights also when there is errors in digital audio data. What device exactly is feeding 8240's?

Some troubleshooting points to be shooted:

-Is it S/PDIF or AES/EBU -source?

-How long cable? Is it DIY?

-If long cable + S/PDIF source, are impedance levels 75/110 ohms matched?

-What sample frequency source uses? Try plain 44,1 or 48 kHz.

-Has that source ever before worked OK as AES/EBU or S/PDIF use?

-Try different digi-source or switch to analog connection.


Source is my PC (USB) -> Trends UD-10 (from USB to AES/EBU) -> Genelec 8240. Cable from PC to UD-10 is short (USB cable), around 50cm. Cable from UD-10 ("110 Ohm pro AES/EBU digital XLR/XLR") to 8240 is 2m. It's not DIY. Impendence is matched (UD-10).

Default format is set to 16 bit, 44100 Hz.

I have no other digital source, so switching is not really an option I'm afraid :-)