PAC SNI-1

Hello, Andrew! My understanding is that 20k is the high end of human hearing, I think the only one who will hear any difference is a dog.....:o) ! This part works great, sounds great. Steve

Yes, it will limit the frequency, but your not going to be able to hear the frequencies that will be filtered out, most people only hear in that 20hz to 20khz range anyway.

They are about an 1 inch thick and about 1 1/2 long I got two to fit behind the head unit. Good luck.

it worked for me. i installed an after market radio and ended up with alternator whine. this installs between you head unit and the speakers. i put phono plugs on my left. and right speaker outputs and plugged into this unit...

Yes, you can also plug the PAC SNI-1 into your equalizer's RCA output instead of the head unit if ground loop noise is occurring from the EQ. I hope that helps! My bio: http://www.crutchfield.com/Support/Bio.aspx?bio=159

This product does not have any audio controls other than weather you connect the brown wires or not. You may want to look into sound processors to help restore the bass. Those are good about reducing the noise floor in the audio itself so they should help with that part too. I recommend calling an advisor on 1-800-324-9695 to discuss those products. HTH! My Bio: http://www.crutchfield.com/Support/Bio.aspx?bio=101

If you purchased the product from Crutchfield, feel free to contact our Tech Support team. They can walk you through the settings on the product and see if there may be a fix. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase the unit from Crutchfield, then you may want to contact the manufacturer. You can also post your question in our forums: http://community.crutchfield.com. Or try our online support center: http://crutchfield.custhelp.com/app/answers/list/kw/.

Since we don't carry the Metra noise filter you're referring to, there's no way to know if this PAC noise filter would work better, worse or the same. However if you wanted to try this one out, keep in mind our 60-day money back guarantee that we include with every purchase. You can find more details about our return policy on our site here: http://www.crutchfield.com/support/returns.aspx I hope that helps. My Bio: http://www.crutchfield.com/Support/Bio.aspx?bio=159

When installed properly, no; not negatively anyway. Sound quality should only improve once the ground loop noise is eliminated. Hope that helps!

I forwarded your question to an Advisor and they responded with the following: The PAC SNI-1 will eliminate interference and noise of all kinds that is created from a ground loop problem. If you are running an amplifier or amplifiers then this is the best solution in most cases for eliminating the noises that you have mentioned. Some cars with factory amps, like Mustangs for example need a 12V to 5V converter instead. If you would like to discuss further you can contact an Advisor directly by phone (1-800-324-9695) or online chat.

I have a monoblock running my 12 and a 4channel running my door and rear deck I started by unplugging the RCAs from the amp to see which pair would eliminate the sound once I found it installed only one and all noise was gone hope this helps I know it helped me

No you need two.

Sorry, I just realized what this was. You need one for each amp. In my case, the amp would sense no signal when I changed channels and would turn off. Then when the stereo started playing the new channel it would turn back on. Huge noise problem changing channels. This filter delays the the signal from disappearing so the amp doesn't turn off and you will want one for each amp. So yes, each amp needs it's own filter. Worth the money!

I had only one amp for two sub speakers. I would think you would need one for each amp with a red/white right/left for each amp But you could split it as a low input. My setup was for rear bass only. You may be able to use only one as a low input to two subs. I would refer to the wire diagram that came with your equipment.