Electrical frequency interference help.

[Tech_Sport]

I'm having a bit of an issue with the speakers I own. Whenever I want to use them when gaming I am constantly getting electrical feedback. I moved the speaker's line into the front of the computer away from the graphics card at the back which cut down 20% on noise but it still isn't playable, the noise put off by the speakers dwarfs the in game noises. Explosions are the only noise that can make it through but that in-game noise was drowned out in comparrison. The ONLY time the speakers are unusable is when I try to play a game, they don't emit a noise when watching youtube or when my phone is plugged into them (minus an almost inaudible hum when idol).

I am using a set of 4 JBL LSR308's (good enough quality for me to keep most of the blame away from the speakers) and they are run in a 4-war stereo configuration (one side right noises and one side left noises).

Is there a way to filter some of that noise out of the line from my computer? Possibly a DAC?

[Stagea]

Is the audio okay when you're using headphones?

[Tech_Sport]

Just now, Stagea said:

Is the audio okay when you're using headphones?

Yes, it is.

[Stagea]

Just now, josh22920killer said:

Yes, it is.

Oftentimes a parallel resistor is enough to reduce the input impedance of the amplifier to quiet things down (making the impedance close to that of your headphones). The lower circuit impedance makes it less prone to interference. Of course an external DAC is also a possible solution.

[Stagea]

LSR308 input impedance: 10kOhm

Headphone input impedance: probably around 16 to 600 "nominal"

 

Try buying four 33 ohm resistors. Bridge the reference and the signal lines for each corner of your setup to take away the pesky buzz. If my calculation is correct, this should attenuate the interference by as much as 24.8 dB (if everything else is perfect).

 

[Tech_Sport]

1 hour ago, Stagea said:

LSR308 input impedance: 10kOhm

Headphone input impedance: probably around 16 to 600 "nominal"

 

Try buying four 33 ohm resistors. Bridge the reference and the signal lines for each corner of your setup to take away the pesky buzz. If my calculation is correct, this should attenuate the interference by as much as 24.8 dB (if everything else is perfect).

 

This sounds a little more complicated than you let on, could you elaborate further on how to add a resistor?

Also if I were to get a DAC to solve this, what would I need to look for to be sure it's meant for speakers (if that matters)?

[Stagea]

Are you using a TS connector per monitor? If so, just put one resistor inside each TS connector by soldering one end of the resistor to the tip connector and the other to the sleeve connector (tip is the one in the center, sleeve is the one that crimps around).

 

As for an external DAC, I suggest going for a multichannel one (typically an external sound "card"). This will allow you keep a separate channel per monitor to properly handle multi-channel tracks. The Sound Blaster Omni Surround 5.1 and Asus Xonar D5 are examples. The main downside is that Windows 10 is too clamped-down audio-wise that most sound card drivers/software lost their ability to introduce digital delays (for time alignment) and filters (for equalization).

 

 

 

 

 

[Tech_Sport]

23 hours ago, Stagea said:

Are you using a TS connector per monitor? If so, just put one resistor inside each TS connector by soldering one end of the resistor to the tip connector and the other to the sleeve connector (tip is the one in the center, sleeve is the one that crimps around).

 

As for an external DAC, I suggest going for a multichannel one (typically an external sound "card"). This will allow you keep a separate channel per monitor to properly handle multi-channel tracks. The Sound Blaster Omni Surround 5.1 and Asus Xonar D5 are examples. The main downside is that Windows 10 is too clamped-down audio-wise that most sound card drivers/software lost their ability to introduce digital delays (for time alignment) and filters (for equalization).

 

 

 

 

 

So, let's say I add the resistor. Will that lower audio quality, volume, or change the frequency range?

[Stagea]

3 hours ago, josh22920killer said:

So, let's say I add the resistor. Will that lower audio quality, volume, or change the frequency range?

It is like plugging a headphone to your PC. Different outputs will behave differently. It will be a tougher load to drive than your speaker's amplifier, but if you're fine with how headphones sound with your PC then the impact in your case probably isn't much.