How I test RCA pre-out voltage (bad advice in video - see comments)
Вставка
- Опубліковано 6 жов 2024
- Mind you this is a split RCA out from my headunit. So at Max volume I'm getting 1.2v from my sub pre-out on the back of the Joying HU. I prefer to see 4 volts. So I'll be buying a RCA amplifier/booster. Assuming it won't introduce noise in the line. Time will tell.
- Авто та транспорт
You cant divide voltage from rca its the same. Even if you ise a y splitter its the same
You are correct. I was mistaken towards the end of this video to have added the voltage together to come up with 1.2v
I need to make an updated video to divulge that even with a Y splitter, voltage remains the same. It is not half per RCA like I mistakenly pointed out in the video.
Thank you for this video! I am learning so much from the online community!
You're welcome 🙂
Here's a video showing how to test for grounds
ua-cam.com/video/JbcYNspVzIQ/v-deo.htmlsi=gotOM1Vh7TCD_Dik
I went with the atoto s8 pro and i only went with it because it had optical output, which is FAR BETTER, than using rca outs on any HU when connecting to a DSP. But, before i switched over to optical, i used a Tru Technology amp line conditioner which allows me to input 8v of clean power into my amplifiers regardless of what the HU has.
heck yes man! That is clean voltage
I think android units are great, but the pre outs are the only down side. I usually tell people to invest in a line out converter if your getting an android unit.
Agreed.
Surprisingly they listen to our feedback over the past 2 years and the new revised 2023 units from Joying have 2v pre-outs. Not the greatest but better than what my 2021 unit had in the video above.
I will gain match my amp now with these new higher voltage pre-outs
That is so true I have a audio control DQDX installed doing some testing and I also have the LC7I that I may put in and take out the DQDX
@ElevatedVehicles well, the sad part is that 2v is only at max volume, and it's still .2v on subs
I also like 4-5V on my preout, you have to introduce more gain to achieve the setting you want on the sub amp with lower preout V. Audio control makes good stuff.
On a joying headunit switch it to loud in your settings leave your hpf and lpf open. That's what your Amp is for. get yourself a line driver hook it up to your RCA then hook it up to your Amp you will see a night and day difference in your subs or sub.
I'm on my 3rd joying headunit I've dealt with one rca for my subs for a minute but they hit hard.
Damn I didn't even think to put high pass & low pass to full because yes that makes sense. The amp is gonna filter it anyways. Solid idea.
I read loud, on the Joying, will push more volts to the sub pre-out higher at lower volume and decrease voltage as you increase volume to avoid clipping from the headunit. Is that true?
@ElevatedVehicles Yes, just leave the sub settings open. When you put it on loud mode your subs won't clip because your only getting signal from 1 sub RCA but you have a chance of clipping your mids and highs the best way to handle that is to use your EQ and lower your mids and highs. But regardless your mids and highs still will be louder on lower volumes, its just less volume to turn up, that's all. I use Power Amp app for my music all my music is in the headunit.
@@22mell01 thank you for the tip!
@22mell01 Glad I found this video and these comments!
I bought a Joying HU last year.
Since it blew my factory speakers I decided to upgrade them and add an amp.
This is my first amp install. I totally misunderstood how to check voltage from the RCA outputs! I had my meter set on VDC. I even emailed Joying for support.
Now I see here that not only was I measuring the wrong way; there still may be a need for an LOC? I'm getting around .8VAC.
Question... Is there such things as low level to low level LOCs or do I get high/speaker level LOCs?
Thanks in advance!
@@ItsMrAnthony-8aline driver.
Shame they aren’t higher voltage preout. Only thing holding me back from buying one of these.
They are well worth it!
I upgraded my BS '14 Camry "Infotainment" head unit and never looked back! So many features! My head unit is basically an extension of my Galaxy phone. Ex. I download content straight from my home music server when I'm parked in my garage and on home wifi.
If you have the extra cash, invest in a line out converter! Or wait for the 2VAC units to come out.
You won't regret it!
Hi
My 2001 joying have 2 per-out for the subwoofer and it's about 1.5 - 2.0 volts
Very nice very nice
Hii,
I have a weird issue
When i normally play songs in headunit with my phone using bluethooth, my subwoofer only producing little bass but when i increase bass through my phone like 12db to 17db its produces bass well .
Is it car headunit rca output that gives low voltage signal?
I just noticed you’re using a -3db video. Find a 0db test tone file to test instead.
So this is the older Joying unit from 2021 but yes you're right. This was a bad test
I see you set the subwoofer out to 25hz and 100hz now what do you set your amplifier lpf to ?
I can't remember it was a long time ago.
Adding voltages is wrong,
Agreed, please read the pinned comment. 😎
but how r u playing that tone without any scary noises coming out of the speakers? i want to do this but i dont want to bug the neighbors thx
The RCA from the headunit do not go into the amp. So no sound goes to the amp. So no sound comes out of the speaker
@@ElevatedVehiclesbut the sound doesnt come out of all the other speakers in the vehicle?
@@sp00f34 it does not because I have a low pass filter set
never use youtube to test sounds youtube has a lower volume range then anything else
Agreed. I've learned a lot since this video 😎
My kicker amp is running only a single rca from my pioneer head unit, installer said this is better
Side question, you thinking about doing a 360 bird eye view on the Jeep? I just ordered the joying 11.6 and they don’t offer a camera kit
I'm going to try that tonight (running a single RCA) because I'm getting some ground loop feedback in my sub... Unless I unplug the RCA cables then it's gone. So I'm hoping that will be the fix.
Yes! Would love a 360 bird eye view for off roading & parallel parking. Agreed, sucks Joying doesn't offer one but apparently they're working on it. I am, however, installing a front camera that will be ran to small video splitter so I can easily toggle between front and rear. Front will be 'slave' to rear meaning rear will always be default and 'on' unless I hit the toggle switch.
Speaking of, I just uploaded a video about the toggle switch I'll be using.
@@ElevatedVehicles nice! need more info on the push button start. I have a 2015 JKU
@@MastaFlash13 damn good eye! I'm working on a system that will compete with smart Wrangler but at a better price point. Plus smart Wrangler system is in Australia. But we should be announcing something in the next 3 weeks ❤
@@MastaFlash13 More info about smart wrangler on my UA-cam channel 😊
@@ElevatedVehicles did you get the ground loop noise sorted out? If so what fixed it?
Is that a tablet
It's the most badas headunit available currently. I have SEVERAL videos on my channel on this head unit. It's the Joying 13.3" android head unit.
A head unit that’s bad ass
@@iang7523 indeed! Love my Joying headunit out of all the ones I've tested.