New HU. One sub RCA?

PontiacGA · 02-03-2008, 04:38 PM

I just installed a head unit that only has one sub out RCA. My other HU had two(Left and right), so I had ran a 2 wire RCA for it. My sub amp (mono) has two RCA's in. Now, I put a Y adapter at the head unit and left the two plugged in at the amp. But, I get no sound from it.

I took the RCA's from the amp that powers my rear speakers and the sub amp worked fine with those. I just cant get any power from the Sub output on the HU. Any ideas?

Also, what is LO/DX?

GizmoQ · 02-03-2008, 05:22 PM

Make and model of the headunit?

PontiacGA · 02-03-2008, 08:27 PM

Innovatek IN-471VFD. I know not the best (Had an Alpine in before, but wanted DVD playback for my newly molded in screen).

lbridges · 02-03-2008, 08:55 PM

Quote: Originally Posted by PontiacGA

I just installed a head unit that only has one sub out RCA. My other HU had two(Left and right), so I had ran a 2 wire RCA for it. My sub amp (mono) has two RCA's in. Now, I put a Y adapter at the head unit and left the two plugged in at the amp. But, I get no sound from it.

I took the RCA's from the amp that powers my rear speakers and the sub amp worked fine with those. I just cant get any power from the Sub output on the HU. Any ideas?

Also, what is LO/DX?

LO/DX is probably an FM radio thing for local/distant, it sets the sensitivity of the receiver to avoid cross talk between stations near each other in frequency.

As to the sub, a Y adapter off the headunit and into the pair of RCAs to the amp should work fine. Check the settings, - you probably have to turn on the sub output, it might be set to OFF by default.

PontiacGA · 02-04-2008, 12:54 AM

Quote: Originally Posted by lbridges

LO/DX is probably an FM radio thing for local/distant, it sets the sensitivity of the receiver to avoid cross talk between stations near each other in frequency.

As to the sub, a Y adapter off the headunit and into the pair of RCAs to the amp should work fine. Check the settings, - you probably have to turn on the sub output, it might be set to OFF by default.

I think you're right about the sub output setting. I have NO idea where the manual is for it, but I looked online and there is a sub menu. So, I'll try that tomorrow. Thanks.

GizmoQ · 02-04-2008, 01:05 AM

If I had to guess, I'd say look in your headunit manual for sub activation. Its probably a press and hold of the MOD button. I think on my old indash DVD it was the EQ or loudness button, but it had to be held in for 2-3 seconds and then the display would say SUBWOOFER to let me know it was on.

PontiacGA · 02-05-2008, 06:51 PM

Thats what it was. It thumps nice and loud now. First HU I had that you had to turn on the SW from the HU. Of course, all my others have been Kenwoods and Alpines.

Thanks.