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Help Figuring out if RCA is Differential or Single Ended


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So I've been trying to get this figured out and I simply cant.

I have a Pioneer 80 PRS and amps are Alpine MRV f407, F1507, T575 (Early 90's Expert series amps)

I have tried turning them on, sending a signal through, trying to check with it off, and sometimes I get a conntinuity check and other times its blank.

Can you guys please help me and also if you know if they are SE or Differential.

Thank you!

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Ok I have a theory.... LMK if this makes sense.

When I hook up the amp on my test bench both MRV1507 and MRVf407 (the other one is in my car)

The protection light flashs red which means: RCA GROUND FLOAT

This makes sense because I don't have a common ground on my test bench, its just a 120V to 13.8 10AMP converter and the signal is comingfrom AUX-RCA Y splitter (twisted RCA).

Basically this means the amps are SINGLE ENDED because it is looking for a common round between the RCA and the Battery (in my case converter)

Edited by HunterJohnson

Scion tC SQ Build
iPad mini, lots of fabrication, daily driven
Ford Explorer C Pillar Wall Build

Just a cheap car to destroy with bass :D

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Use a DMM and measure the resistance from the RCA outside conductors to the device's chassis or ground terminal.

If you see basically a direct short, it's single ended (unbalanced).

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Use a DMM and measure the resistance from the RCA outside conductors to the device's chassis or ground terminal.

If you see basically a direct short, it's single ended (unbalanced).

so where would I ground it on my amplifier?

Scion tC SQ Build
iPad mini, lots of fabrication, daily driven
Ford Explorer C Pillar Wall Build

Just a cheap car to destroy with bass :D

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Everything unpowered and disconnected.

Resistance between the RCA outside conductor and the amps ground terminal.

General procedure:

<1ohm = single ended

~1000-ish ohms = balanced

No connection = your HU probly blew its pico fuse

This post sent with 100% recycled electrons.
2004 BMW M3
Mechman 280A
2 - XS Power XP3000

1 - XS Power D375

500F of Maxwell SuperCaps (soon to be 1000F)
iPadMini2

Dash mounted O-scope
Audison bitOne (Remote DRC MP)
Highs Amp - PPI Art A404
Hertz HSK130 (HSK165 waiting...)
DC Audio DC9.0K
2- DC Audio XL12m2

LEGAL             - 147.3dB @ 41Hz
OUTLAW         - 150.2dB @ 45Hz

OUTLAW         - 145.7dB @ 30Hz
JUNE 2014 SOTM WINNER

2014 COLORADO PEOPLE'S CHOICE WINNER

SOTM BUILD:
http://www.stevemeadedesigns.com/board/topic/141656-wicks-e46-m3-build-bass-turbo-button-and-a-big-new-addition/page-68#entry2802026

sig-sized6_zps0265e669.png

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Everything unpowered and disconnected.

Resistance between the RCA outside conductor and the amps ground terminal.

General procedure:

<1ohm = single ended

~1000-ish ohms = balanced

No connection = your HU probly blew its pico fuse

So I guess my HU is SE and amps are DIFF so ill be going with twisted.

Thank you!

Scion tC SQ Build
iPad mini, lots of fabrication, daily driven
Ford Explorer C Pillar Wall Build

Just a cheap car to destroy with bass :D

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sounds like with those reading, giving you don't have an unforeseen ground issues. coax head unit, twisted amps

Yup this is with them standing alone. No power or connections.

Twisted RCA's for me

Scion tC SQ Build
iPad mini, lots of fabrication, daily driven
Ford Explorer C Pillar Wall Build

Just a cheap car to destroy with bass :D

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