normal? noise with volume all the way down

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i am an idiot

Platinum - Posts: 13,670

This member consistently provides reliable information

Joined: September 21, 2006

Location: Louisiana, United States

Posted: September 20, 2009 at 2:37 PM / IP Logged

Yes that sounds as though it may be a meter. There are 3 separate ranges, right? Ohms is one range then RX10 is the second range and RX1K is the 3rd, Is this correct? First you will probably need to zero the meter. Place it in the Ohms range and touch and hold the 2 meter leads together. There should be an adjustment that you can turn to make the meter read 0 Ohms. Unplug both sets of RCA cables from the RCA jacks of the amplifier. Touch and hold the black meter lead to the ground terminal of the amplifier, then touch the red meter lead to the shield of each of the 4 RCA cables. One cable at a time. How close to 0 does the meter swing? I need values on each of the cables.

Now to check the amplifier. Leave the RCA cables disconnected and touch and hold the black meter lead to the shield of one of the input RCA jacks of the amp. Now touch the red lead to one of the non bridged speaker wires. Either front or rear, the non bridged wires are the 2 wires that would not be used if you bridged the amp. What does the meter read now?

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imupabove

Copper - Posts: 369

Joined: March 14, 2009

Location: California, United States

Posted: September 24, 2009 at 2:09 AM / IP Logged

haemphyst wrote:

Don't sweat it... the low-level hissing you are so loudly complaining of is perfectly normal.

The popping you hear may or may NOT be normal, or more accurately, correct. You didn't tell us what amp you are using, so we can't make any sort of informed decision as to whether the amp is or is not defective. A cheezy amp might not have the best of muting circuits, causing the pops, where better quality gear has better components and better circuitry.

how can i get rid of that "low-level hissing" noise? will a Ground Loop Isolator help? what are they for exactly? thank you.

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i am an idiot

Platinum - Posts: 13,670

Joined: September 21, 2006

Location: Louisiana, United States

Posted: September 24, 2009 at 5:48 AM / IP Logged

Have you bypassed the EQ yet?

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normal? noise with volume all the way down

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