Upgrading from HiFi system. Questions

thomas1097 · 06-07-2021, 02:35 PM

I currently have the HiFi system in my '11 E90 sedan. I'm planning on upgrading all the speakers and adding 2 10" subs along with a 4 channel amp and monoblock amp. I ant to keep my factory HU the way it is so my question is would I be able to splice the HU wires from the factory amp harness in the trunk?

Should I splice into the speaker wires and run them to the amps or should I splice into the HU wires that come from the HU to the harness that control the speakers? What is the difference in these wires? I am going off the pic that was stickied fo re90 wiring diagrams. See below. Thanks guys.

ctuna · 06-07-2021, 10:15 PM

oops
You shouldn't splice anything buy a Technicpnp harness for Hi fi.
https://technicpnp.com/
This will give you access to all Input and Output Wires without cutting
anything.

See the links in entry 3 in the following thread.

https://www.e90post.com/forums/showthread.php?t=1831790

thomas1097 · 06-08-2021, 08:54 AM

Quote:

Originally Posted by ctuna

oops
You shouldn't splice anything buy a Technicpnp harness for Hi fi.
https://technicpnp.com/
This will give you access to all Input and Output Wires without cutting
anything.

See the links in entry 3 in the following thread.

https://www.e90post.com/forums/showthread.php?t=1831790

This is absolutely awesome information and exactly what I needed, Thank you so much! The only question I have is if I go with a Technicpnp harness I am limited to the type of amp I can use? What if my amps are not balanced input amps?

ctuna · 06-08-2021, 12:05 PM

that is not a function of the harness . this is a function of the head
unit.(The OUtPUt of the Head Unit is differential)
You can get double to single signal converters
Although the reverse is more common.
but most good amps will take either input.

Check the amp specs .
differential outs are like reduced speaker outs.

D-e93 · 06-09-2021, 06:59 AM

Something like this: https://www.crutchfield.com/S-7tMcrl...saAm-CEALw_wcB

ctuna · 06-09-2021, 07:11 PM

my favored brands are Helix/Match from audiotech fisher, Mosconi or Jl Audio.
There is more of a track record here with those.

Pabs10000 · 06-11-2021, 07:57 AM

Will any Logic 7 HiFi model work on an e90?

ctuna · 06-11-2021, 02:06 PM

https://www.e90post.com/forums/showthread.php?t=1831790

Read all of the first set of links in entry 3 of the provided link in this entry.

06-07-2021, 02:35 PM	#1
thomas1097 New Member 0 Rep 25 Posts Drives: 2011 BMW 328i xDrive Sedan Join Date: May 2020 Location: New York iTrader: (0)	Upgrading from HiFi system. Questions I currently have the HiFi system in my '11 E90 sedan. I'm planning on upgrading all the speakers and adding 2 10" subs along with a 4 channel amp and monoblock amp. I ant to keep my factory HU the way it is so my question is would I be able to splice the HU wires from the factory amp harness in the trunk? Should I splice into the speaker wires and run them to the amps or should I splice into the HU wires that come from the HU to the harness that control the speakers? What is the difference in these wires? I am going off the pic that was stickied fo re90 wiring diagrams. See below. Thanks guys. Attached Images
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06-07-2021, 10:15 PM	#2
ctuna Lieutenant General 1911 Rep 13,101 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	oops You shouldn't splice anything buy a Technicpnp harness for Hi fi. https://technicpnp.com/ This will give you access to all Input and Output Wires without cutting anything. See the links in entry 3 in the following thread. https://www.e90post.com/forums/showthread.php?t=1831790 Last edited by ctuna; 06-07-2021 at 10:23 PM..
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06-08-2021, 12:05 PM	#4
ctuna Lieutenant General 1911 Rep 13,101 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	that is not a function of the harness . this is a function of the head unit.(The OUtPUt of the Head Unit is differential) You can get double to single signal converters Although the reverse is more common. but most good amps will take either input. Check the amp specs . differential outs are like reduced speaker outs. Last edited by ctuna; 06-08-2021 at 12:21 PM..
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06-09-2021, 06:59 AM	#5
D-e93 Private 16 Rep 80 Posts Drives: Titanium e93 Join Date: Jun 2012 Location: Beamin South, FL iTrader: (0)	Something like this: https://www.crutchfield.com/S-7tMcrl...saAm-CEALw_wcB __________________ Hi-Fi \| AudioControl D6.1200 & Crescendo-S1V2 \| FiQ 12" \| Morel MSW 265 8" \| Morel MSW 114 \| Dayton AMT Tweeters
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06-09-2021, 07:11 PM	#6
ctuna Lieutenant General 1911 Rep 13,101 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	my favored brands are Helix/Match from audiotech fisher, Mosconi or Jl Audio. There is more of a track record here with those.
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06-11-2021, 07:57 AM	#7
Pabs10000 Banned 0 Rep 1 Posts Drives: Bmw 330I Join Date: Jun 2021 Location: Untied States iTrader: (0)	Logic 7 Will any Logic 7 HiFi model work on an e90?
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06-11-2021, 02:06 PM	#8
ctuna Lieutenant General 1911 Rep 13,101 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	https://www.e90post.com/forums/showthread.php?t=1831790 Read all of the first set of links in entry 3 of the provided link in this entry.
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