|
|
|
|
|
|
BMW Garage | BMW Meets | Register | Today's Posts | Search |
|
BMW 3-Series (E90 E92) Forum
>
Add amp to base audio without harness [E91 2008]
|
|
02-06-2020, 06:17 AM | #1 |
Private
8
Rep 55
Posts |
Add amp to base audio without harness [E91 2008]
So I want to buy these to upgrade my wife's E91:
- Eton B100T (speakers + tweeters) - Pioneer GM-D8604 (4 channel amp) - door pillar things She has Base audio now, with Professional iDrive HU. I can recode it to hifi. I'll leave the woofers as they are for now. Rear speakers will remain powered from HU, there's only dogs near those. I don't want to buy a harness, the car has some milage, so i'm looking to save very penny. My solderingskills are fine, trying to figure out basic wiring. Can I just cut the wires to the subs, send them to the amp, and then send back the signal to the fronts and subs? Or is there more to it? Maybe someone has a picture where the wires run in the car? Last edited by Knuppel; 02-06-2020 at 08:55 AM.. |
02-07-2020, 04:23 AM | #3 |
Private
8
Rep 55
Posts |
Ok so I tap into connectors X9385 till X9388.
What's best practise? - use this and run a long RCA-RCA cable between it - strip one side of a long RCA cable en connect it - lenghten the speaker cable and solder a RCA connector to it. And am I correct to understand that I can input 2 channel, and output 4 channel from the amp? Last edited by Knuppel; 02-07-2020 at 04:29 AM.. |
Appreciate
0
|
02-07-2020, 07:41 AM | #4 |
Major General
1924
Rep 6,968
Posts
Drives: 2007 Black/Black 335i e90
Join Date: Apr 2011
Location: Holly, MI
|
To add an amp like a sub woofer amp, you'd have to buy a technique harness
|
Appreciate
0
|
02-07-2020, 11:02 AM | #5 |
Lieutenant General
1988
Rep 13,280
Posts |
Most amp's have a one channel in to two channel out function.
If you don't just use a Y to split one input into two. You don't have to buy a harness for anything . But making ones is harder and more subject to failure. What you don't want to do is hack up your factory harness. If you split this line you are running speaker outs to the Amp be sure your amp is capable of running speaker out differential two sided Inputs in which the outside shield on the RCA is not common ground but one side of the speaker out. Last edited by ctuna; 02-07-2020 at 11:08 AM.. |
Appreciate
0
|
02-07-2020, 02:03 PM | #6 |
Private
8
Rep 55
Posts |
Thanks. The amp has speaker line input, they even supply a cable for this (which I dont have because I bought the amp second-hand).
I’ll be using the connectors stated in the Alpine manual, and connect them using splice connectors to the adapter cable. From there run RCA cables to the amp and speaker wires back to the woofers and doors. Now to figure out how to safely attach the amp to the battery. Thinking about doing this way, but I can’t understand why BMW would allow 100amps on the distribution block connector, yet supply a connector that can only crimp 4mm2 wire. According to a wire calculator I need 25mm2 (4 gauge) for 80amps. According to the manual I need 8 gauge which translates to 10mm. Fuse added ofcourse. Last edited by Knuppel; 02-08-2020 at 04:50 AM.. |
Appreciate
0
|
02-12-2020, 06:55 AM | #7 |
Second Lieutenant
88
Rep 236
Posts
Drives: e92 335iA
Join Date: Nov 2018
Location: Prague
|
My ghetto way of doing the same... btw - I run Eton 100 up front, rear are stock, under seats Earthquake SWS-8 3 ohm version, amp Eton 4x100W rms powering so far just the underseats (+ 12´´ JL in the trunk in the near future)... front is run by Audiotec Fischer DSP amp mounted under the dashboard... it sounds really clean however since I can not at this moment to split the signal from door to underseats, it is hard to limit the freq going to doors... I will ultimately have to run par of wires to them as well...
Don´t mind the mess in the trunk :-)
__________________
"If everything seems under control, you're not going fast enough.” Mario Andretti
Last edited by streetpro; 02-12-2020 at 07:04 AM.. |
Appreciate
0
|
04-19-2020, 12:21 PM | #8 |
Private
8
Rep 55
Posts |
So i took the plunge and added a Pioneer D8604 amplifier, Eton B100T speakers and tweeters, and wired everything up per Alpine retrofit manual. Stock base subs, but will be exchanged.
Now, the doorspeakers have (too) much bass. I set the HPF and LPF to 80hz per amplifier manual. Is this correct? The Eton B100 manual states 150hz, but that leaves nothing? Or is this a normal value for doorspeakers? I also still have to code ccc to hifi. Last edited by Knuppel; 04-19-2020 at 02:56 PM.. |
Appreciate
0
|
Bookmarks |
|
|