All Things Mk5 > Sat Nav and Car Audio

RNS510 Aux out

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golfather:
Point was you dont need any line out converters at all.
The Aux out (if it works) is ideal for the sub.

And if you really want to go the whole hog and amp up the front and rears, then you can recode the RNS510 to give low level outputs instead of high, on the speaker terminals, thereby giving you front and rear pre-outs.

This will provide a very good compromise for a fully amped system.

All the rest you talk about is perfectly viable. But just depends how far you want to go...

mclovin:
Of course it's viable, I have already done it!

You still need to use a LOC even if you recode the RNS for low-level speaker output by the way.

I don't consider amping front speakers to be going "the whole hog", far from it, it should be the primary step for anyone looking to get a better sound from the RNS. I personally do not see the point in simply adding a sub to a system that relies on the internal amp to drive the main speakers as the overall sound quality will still be poor. Focus on the speakers you actually hear most of the time, get that right and then add a sub to fill in the low frequencies. The fact is that you can do all of this with a simple LOC, a decent four channel amp and a passive sub.

I don't mean to sound condescending in any way, I just personally fail to see what you could gain from using this auxillary output just to power a sub without sorting out the primary speakers first, also don't be afraid to use a LOC, they are inexpensive and they do a surprisingly good job. One aspect of this, however, does interest me and that is whether or not you can still get a 4V pre-amp output out of these terminals whilst the RNS is set to low frequency speaker output, in essence giving a third pre-amp output, something that could be very useful.  

golfather:

--- Quote from: mclovin on March 24, 2010, 06:30:45 pm ---You still need to use a LOC even if you recode the RNS for low-level speaker output by the way.


--- End quote ---

Really? Why?

mclovin:
You can recode the RNS-510 to drop the speaker output from 26dB to 12dB, but that doesn't necessarily mean it turns the speaker output into a standard 4V pre-amp output.

Let's say that the RNS-510 has a 50W internal amp, as we know car speakers have an impedance of 4 Ohms we can work out roughly what that output is in volts because W=VxI. Therefore without recoding, the speaker output would be about 12.5V. By dropping the power output down to "12dB" you would be effectively dropping the output down to about 5.8V. Of course this is inexact as we don't know for sure what the peak power output of the RNS-510 is and we certainly don't know what the impedance of it's internal amplifier is, but the chances are it's not going to give you a true 4V pre-amp output.

Throwing more than 4V at an amplifier can damage it and personally I would not want to take this risk with £400 worth of car amplifier. adding in a £20 LOC guarantees you a true 4V pre-amp output that you can use to drive your amp without risk of damage or drop in sound quality. It'll also give you a remote power output and a set of handy RCA connectors, so it's well worth the minimal outlay.

golfather:
Back on topic, has anyone connected a set of RCA's to the alleged AUX OUT of the RNS510 to see if they work?

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