E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > Tuning & Tech > Bavarian Soundwerks' Mobile Electronics Forum

Bavarian Soundwerks' Mobile Electronics Forum
Have all your A/V and electronics questions answered here. Ipods, A/V, Radar Detectors Oh My!
Sponsored by Bavarian Soundwerks

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 10-21-2002, 01:09 PM   #1
Faded-Creed
Registered User
 
Join Date: Dec 1969
Posts: 3
What is balanced input/output in regards to factory head unit/ aftermarket amp?

Hello,

I'm taking my time and researching upgrading my stereo. I have a non HK system.

I have the NAV so I don't want to change my head unit, so Iíve noticed the best way to go as far as an amp is one that will accept a balanced input. What does that mean and what amp should I get? I don't want to get screwed by my local radio shop!

By the way all I want to add is new speakers all around. I'll probably not add a SUB if the only place I can put it is in the trunk.

Thanks for the Help!
Faded-Creed is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 10-21-2002, 02:02 PM   #2
drgalleg
Registered User
 
Join Date: Aug 2002
Location: Chicago Burbs
Posts: 449
My Ride: '02 325Ci
Send a message via AIM to drgalleg Send a message via Yahoo to drgalleg
Grabbed from http://www.gainesaudio.com/faq.htm :

What's a balanced line interface, and where would I use one?

A balanced line interface is a go-between that allows audio products which have differing input/output standards to talk to each other. For example, the CD player in your home stereo system might have an unbalanced RCA output operating at a nominal signal level of -20 dBV and with an output impedance of 1,000 ohms. That's fine if you're connecting it to another piece of equipment - say, your home stereo receiver - that's talking the same language. However, if you try to connect that same CD player to a professional mixing console that's expecting a balanced line operating at a nominal signal level of +4 dBV and with a 600 ohm source impedance, the results may not be what you hoped for. You might experience noise, high frequency loss, or distortion. A proper interface assures that consumer (or semi-pro) gear will be a good match for professional equipment.
What's a balanced line anyway?

An unbalanced audio line uses two wires to make a connection: hot (signal) and ground. A balanced line uses three wires to make the same connection: signal plus (+), signal minus (-), and shield (ground). Because the signal lines are independent of the shield, you have more flexibility in determining how the shield is connected - or not connected - and a better chance of eliminating ground loops (ground what? Don't worry, we'll get to that) and hum. If that balanced line is then connected to equipment with a balanced input, noise induced into the cable is greatly reduced, resulting in the highest quality transmission from your source to your destination. That's why balanced lines are the standard in all broadcast and professional audio installations.

So basically a balanced output from a headunit theoretically gives a much cleaner signal than an unbalanced one. Higher end amps like Xtant and JL Audio accept balanced inputs.
drgalleg is offline   Reply With Quote
Old 10-23-2002, 09:21 PM   #3
rome5982
Registered User
 
Join Date: Sep 2002
Location: Palm Beach Gardens, FL
Posts: 454
My Ride: 99 323i
I just did an audio upgrade for my 1999 323i. I also read up on the balanced differential signals coming from our oem head unit to the oem amp. I installed a Kicker KX600.4 amp that takes RCA and speaker level inputs. The amp took my inputs directly from my head unit (I intercepted them in the trunk just upstream of my stock amp). But, I am experiencing faint alternator whine on my system now. I ordered the Peripheral Vendetta http://store.autotoys.com/cgi-bin/wfp53024.storefront which is suppose to convert the balanced signal to unbalanced. This should cure my noise problem since I did verify that my noise is coming in from my inputs to the amp.............I will let you know how it goes after I install it. I would think that a higher end amp like the ones you mentioned that acept the balanced signals would not have this noise.
__________________

18"ASA AR1/H&R CupKit/ECIS CAI/Stromung Exhaust/Zimmerman Rotors/Aluminum Interior Trim & Face Gauges/G2 Calipers/Clear Corners/Autometer Gauges/Mtech Front Bumper/Chrome Grill/UUC Shift Knob/OEM Rear Spoiler/Painted Moldings/Silver Gauge Rings/JL Audio 12W3V2 & 6.5 Coax/BA 6.5 ProSeries/Kicker KX600.4
rome5982 is offline   Reply With Quote
Old 10-25-2002, 07:24 AM   #4
rome5982
Registered User
 
Join Date: Sep 2002
Location: Palm Beach Gardens, FL
Posts: 454
My Ride: 99 323i
I installed the Peripheral Ven4 differential line converter and that took care of my alternator whine noise on my system.
__________________

18"ASA AR1/H&R CupKit/ECIS CAI/Stromung Exhaust/Zimmerman Rotors/Aluminum Interior Trim & Face Gauges/G2 Calipers/Clear Corners/Autometer Gauges/Mtech Front Bumper/Chrome Grill/UUC Shift Knob/OEM Rear Spoiler/Painted Moldings/Silver Gauge Rings/JL Audio 12W3V2 & 6.5 Coax/BA 6.5 ProSeries/Kicker KX600.4
rome5982 is offline   Reply With Quote
Old 10-25-2002, 08:32 AM   #5
Faded-Creed
Registered User
 
Join Date: Dec 1969
Posts: 3
Thanks for the info

Thanks for the info. I will look into getting a JL audio or A/D/S Amp in the comming weeks. Thanks again!!!!
Faded-Creed is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Censor is ON





All times are GMT -5. The time now is 06:28 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
(c) 1999 - 2011 performanceIX Inc - privacy policy - terms of use