I had a set of MB Quart Premium Series PSD 216 component speakers mounted in my car recently. They are 6 1/2" components with remote-mounted tweeters. They do have crossovers, and they are supposed to be very good speakers, no?

Anyway, my problem is that I get a LOT of background noise/hiss on these front tweeters. I am hearing this on CDs playing on a Blaupunkt San Francisco headunit connected to a US Acoustics USX-4085 amplifier.

I talked to the installers and they said that they could turn down the gain, but that would make the system quieter and I should just turn up the volume. Can anybody here help me out with a better solution?

Thanks,
Ben

 

1.) There is no hiss when there is no signal. But when there is a signal, let's take CDs for example, it doesn't matter what song or what CD.

2.) The treble is neutral, the bass is +2 (can go up to +9), the EQ is off, the loudness boost is off, everything is neutral.
3.) Sorry, I don't understand what this means.

Another question: my HU goes up to a volume setting of 50. My amplifier is 85w RMS x 4. My front speakers are 85w RMS. My rear speakers are 100w RMS. Is it possible for my amplifier to blow my speakers? Since the HU's volume controls aren't really representative of the power to the speakers anymore, what should I consider the maximum safe volume? Were you trying to say in #3 that the HU should be turned to max volume and then the amplifier gain adjusted to a safe max amplification/volume level?

Thanks,
Ben

 

I think you mean the head unit says 85x4 ?? (if not which model is this?).

Your head unit will never blow the speakers due to its power, but could definetly blow it from clipping the internal amp.

The 85x4 you see on the front is usually (99.9% of the time) a MAX/PEAK output. The real output if you see the manufacturer page is prob around 32 watts RMS x 4 (powerful!).

Keep your volume below 2/3rd its max, make sure when your up that high your not running your bass and treble to full + (becuase it will definetly distort). If you wish to continue running at this volume, it might be a good time to consider a proper 4 channel amp (or even better, go 2 channel and run your rear speakers off the deck)

-Rage

 

I have a Blaupunkt San Francisco headunit connected to a US Acoustics USX-4085 Amplifier, rated at 85w RMS x 4, which is mounted in the trunk.

Ben

 

the prob is prolly yer amp ground, you might nopt have noticed the noise beofre because you didnt have compnent highs, (your mb's are very nice speakers) try moving to another part of your frame or even running a couple of grounds to diff spots, thats fixed the prob for me in the past. something i dont recommend doing is getting a ground loop isolater, this hooks up inline to your rca;s and its sposed to help but i did that once, the noise got louder and even when i took it back off the noise remained (pist me off) hope this helps