 | Home > In Car Electronics > New high power head unit - where to ground it? |
 
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| miker Member Since: 13 Sep 2015 Location: Surrey Posts: 1758   
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No problem at all running it back to battery negative!
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31st Dec 2018 9:00pm |
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| desender Member Since: 06 Aug 2017 Location: Perthshire Posts: 34  
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Looks like an interesting head unit. Sony lists it as a CD receiver, but it looks like it doesn't have a CD player built in.
https://www.sony.co.uk/electronics/in-car-...s#features Would like to hear how it's performing. |
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31st Dec 2018 10:04pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 19533
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You should really upgrade the loom on each channel run to each speaker too. Perhaps you are?
The seatbox rear lip has some good fixings into steel, interconnected in the vicinity of the seatbelt bolts. (Obviously don't use the latter.) There are also some substantial fixings on the front bulkhead under the mat / carpet above the acellerator pedal about 2" down from the lower dash lip. These however I would error on caution as the ground path in that vicinity I'm unsure of. (They do seem substantial however.) You can always continuity test however, both should be okay for the wattage concerned. Diesels Lives Matter. ⛽️🛢️👨🔧🧰⚙️ RED, WHITE & BOOST! 🇬🇧 |
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31st Dec 2018 10:48pm |
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| Badger110 Member Since: 06 Feb 2018 Location: South hams Posts: 1025 
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Any bare steel area will be sufficient, it's a sub £150 headunit with a small amp inside, you're not pulling anymore than most modern headunits wired into the loom.
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1st Jan 2019 1:03am |
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| Scrawf Member Since: 24 Jul 2016 Location: Matlock Posts: 25 
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Thanks for you’re help guys! OK I’ll find an earth point on a bolt somewhere!
Out of interest this is the article I was reading: https://www.w8ji.com/negative_lead_to_battery.htm Might be of help to someone? Scrawf |
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1st Jan 2019 10:20am |
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| 300TDi CSW Phil Member Since: 03 Apr 2016 Location: Bracknell Posts: 746 
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That's interesting for one thing as far I'm concerned.
The web address looks like an American Amateur Radio call sign.... so I looked it up and it is. In the wonderful world of amateur radio it is normally advised (even by the manufacturers of the radio equipment) to take the Positive and Negative straight from the battery with fuses in both conductors. This is to reduce the possibility of RF interference between the radio and the cars systems. I guess it is possible that amateur radio transceivers are built in such a way as to eliminate the problems he has mentioned whereas an audio head unit may not be. Personally my Transceivers are wired straight to the battery via an aux fuse box which includes the power to the audio head unit (in my Defender of course my van is a bit different). 1995 300 Tdi Epsom Green - It's a keeper. Wide Track Sankey- In bits- Gone to a new home M0XQS |
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1st Jan 2019 10:58am |
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| Scrawf Member Since: 24 Jul 2016 Location: Matlock Posts: 25
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So I’ve got it all wire in. It’s actually pretty good! I picked this head unit because it has a Class D amp built in and supposedly give you 4 x 100w and I have to say I’m not disappointed! I have Focal speakers all round. Front rear and teeters and a Pioneer powered sub and the addition of this head unit has really made the difference. Ther is definitely more power but it’s not that that really make the difference. It seems as though you can hear all aspects of the music more clearly! Like there is better sound range if you know what I mean! You can push it up to higher volumes but there is no distortion and you can really ‘hear’ all the music. Bass, mid range and top are really clear and the music seems to fill the cabin. Anyway these things are all subjective but I think that was a well spent £139! Thanks for your help guys! Scrawf |
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6th Jan 2019 5:57pm |
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| Badger110 Member Since: 06 Feb 2018 Location: South hams Posts: 1025
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Good to hear! ( no pun intended! )
On the note of 100w pr channel, you won't ever pull that through the speakers and it is a little misleading. 100W is theorectically possible, but music power is a little over half that, around 40-50 watts. As for wiring into the battery directly, most HU manufacturers state this so any faults would be down to the HU and not other factors ( ie bad wiring on the vehicle ).  |
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6th Jan 2019 8:02pm |
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