Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.


mb82

201 posts

Master Geek


#198068 24-Jun-2016 23:35
Send private message

I am making a new wiring harness for my car radio. The harness for the old factory radio has what I believe is ferrite beads on two of the 3 power wires, think it's memory wire and switched 12v. Do I need to include ferrite beads on the new harness, what wires should i put them on? Does it matter on the size/shape of the bead?

 

Wires for the unit are 8 x speaker wires, constant 12v, switched 12v, illumination, antenna and ground. also have aux cord at back of unit 


Create new topic
ubergeeknz
3344 posts

Uber Geek

Trusted
Vocus

  #1579899 24-Jun-2016 23:40
Send private message

won't hurt if you can re-use them, but you shouldn't need them.


 
 
 

Backblaze Unlimited Backup. World’s easiest cloud backup. Get peace of mind knowing your files are backed up securely in the cloud (affiliate link).
richms
26589 posts

Uber Geek

Trusted
Subscriber

  #1579930 25-Jun-2016 07:52
Send private message

They usually exist only to pass electromagnetic emissions testing, to stop conducted RF noise coming out on the cable.

 

I always laugh when I see something supplied with a detachable USB cable with one on it, its not like people will always be using that one cable with the device and they are an annoying pain so many people go to the effort of cutting them off anyway.





Richard rich.ms

Aredwood
3885 posts

Uber Geek


  #1580100 25-Jun-2016 13:40

Use some decent sized cable for the constant 12V and ground. As all of the modern headunits I have seen use this wire as the main power feed. Prob around 2.5mm2 Even going to 4mm2 could be worthwhile. As you will be using 4X 4ohm speakers. So equivalent of 1ohm. Meaning the headunits internal amplifier will be drawing about 14A peak. Plus the power used by the other circuits in the headunit. So you need a big enough wire to deliver that current with very little voltage drop. This reduces the amount that the internal amplifier clips. So you get better sound quality.






Create new topic





News and reviews »

Synology Introduces BeeStation
Posted 23-Feb-2024 14:14


New One UI 6.1 Update Brings Galaxy AI to More Galaxy Devices
Posted 23-Feb-2024 10:50


Amazon Echo Hub Available in New Zealand
Posted 23-Feb-2024 10:40


InternetNZ Releases Internet Insights 2023
Posted 20-Feb-2024 10:31


Seagate Adds 24TB IronWolf Pro Hard Drives for Multi-user Commercial and Enterprise RAID Storage Solutions
Posted 19-Feb-2024 16:54


Seagate Skyhawk AI 24TB Elevates Edge Security Capacity and Performance
Posted 9-Feb-2024 17:18


GoPro Releases Quik Desktop App for macOS and Introduces Premium+ Subscription Tier
Posted 9-Feb-2024 17:14


Ring Introduces New Ring Battery Video Doorbell Pro
Posted 9-Feb-2024 16:51


Galaxy AI Transforms the new Galaxy S24 Series
Posted 18-Jan-2024 07:00


D-Link launches AI-Powered Aquila Pro M30 Wi-Fi 6 Mesh Systems
Posted 17-Jan-2024 20:02


Newest LG 4K Lifestyle Projector Doubles as Art Objet
Posted 9-Jan-2024 15:50


More LG Smart TV Owners Set To Enjoy the Latest webOS Upgrade
Posted 9-Jan-2024 15:45


Panasonic Announces the Z95A and Z93A With Fire TV Built In
Posted 9-Jan-2024 15:30


Amazon Echo Pop Review
Posted 8-Jan-2024 14:22


Samsung Tab S9 FE Review
Posted 17-Dec-2023 08:26









Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.