I have a Dayton Audio 408 processor and i have been having problems with noise and gain adjustment.
When setting my gains using 0db sine waves my headunit outputs 3.7 volts at 3/4 volume and connects to my processor input. With my processor at full volume (66/66) it outputs 3.4 volts with nothing changed on the headunit and no crossovers etc turned on in the processor. My amplifiers then connect to the processors outputs and i am able to set my amplifier gains to the voltage required for maximum output before clipping.
The problem is that there is a static buzz from my speakers which is quite loud. Turning down or muting the headunit does nothing, if i turn down the volume on my DSP then the noise reduces. I played with volume settings on my DSP and at 30/66 i cannot hear a buzz which is great. But now the processor outputs 0.6 volts from the same 3.7 volt input from my headunit. If i then try to adjust my amplifier gains i cannot get a high enough output voltage because of such a small input voltage and as the gain knob maxes out.
Surely the processors output voltage should match the input voltage at some point?
In a nutshell if the processors volume is high enough for me to set the amplifier gains correctly there is a loud buzz. And if the processors volume is turned down to a point where i cannot hear the buzz the processors output voltage is too small.
When setting my gains using 0db sine waves my headunit outputs 3.7 volts at 3/4 volume and connects to my processor input. With my processor at full volume (66/66) it outputs 3.4 volts with nothing changed on the headunit and no crossovers etc turned on in the processor. My amplifiers then connect to the processors outputs and i am able to set my amplifier gains to the voltage required for maximum output before clipping.
The problem is that there is a static buzz from my speakers which is quite loud. Turning down or muting the headunit does nothing, if i turn down the volume on my DSP then the noise reduces. I played with volume settings on my DSP and at 30/66 i cannot hear a buzz which is great. But now the processor outputs 0.6 volts from the same 3.7 volt input from my headunit. If i then try to adjust my amplifier gains i cannot get a high enough output voltage because of such a small input voltage and as the gain knob maxes out.
Surely the processors output voltage should match the input voltage at some point?
In a nutshell if the processors volume is high enough for me to set the amplifier gains correctly there is a loud buzz. And if the processors volume is turned down to a point where i cannot hear the buzz the processors output voltage is too small.
