Audison Bit One Connections help

Snoopy Singh · 10-20-2013, 08:15 AM

I have the base stereo currently. 2 front, 2 rear and 2 under seat subs or mid bass speakers.

The front doors and under seat speakers are wired together from the headunit. I.e 4 outputs from headunit and six speakers.

The bit one accepts 8 hi level inputs. So Front L + R into channel one and two, and Rear L + R into channel three and four.

Now the front L+R and rear L+R signals will be processed before being fed to the amp, but my question is that the under seat subs cant be plugged into the bit one because there is no separate feed from the headunit. Does this mean that I will have to use the amp to tweak the signal for the subs and just have the bit one processing front and rear signals only?

Would love some advise on this.

Thanks

ctuna · 10-20-2013, 11:37 AM

You need to split the doors from the floors.
I am not familer with the audison but splitting the doors from
the floors is whats done to improve the system . there is a Y connections
in the kick panels I believe where the wiring from the Head Units splits
and one side goes to the doors and one to the floors.
So this requires at least one 4 channel amp for the front speaker sets.
If you have the base system the head units signals run into the processor
then the output signals go into and amp and the outputs of the amp run to speakers.
If you want to do the multichannel surround thing then you need more amps and speakers.
See the build threads examples and study.

YOur processor should be able to take the front Head Unit channels and generate
the proper frequency's for the bass speaker , midbass or anything with its crossover setups.
It should be able to tailor any pair of output channels (or output channel for subs)to and amp for the appropriate frequency range also a good amp such as a Jl 600/6 can do the same with its crossover
network.
http://www.e90post.com/forums/showthread.php?t=641323
study the base system setup and look for other base installs on the site.
Like this one
http://www.e90post.com/forums/showthread.php?t=445266
With the proper harness no wires need be cut.

Snoopy Singh · 10-21-2013, 10:55 AM

Thank you for your response. I will look into this and study further.

Cheers

bmw325i · 10-21-2013, 12:06 PM

You need Technic's base harness. It will get the signal from the headunit before it gets split off, so the front channels will be full range. You don't need the signal from the rear channels unless you have pdc. The Bit One should separate the channels for you as ctuna said. Technics harness should also come with the jumpers for the under seats, and you'll have to run new speaker wires to them. The rest of the speakers will be connected using factory wiring and Technic's harness.

10-20-2013, 08:15 AM	#1
Snoopy Singh Private 6 Rep 93 Posts Drives: 06 E92 335D Join Date: Jan 2013 Location: Scotland iTrader: (0)	Audison Bit One Connections help I have the base stereo currently. 2 front, 2 rear and 2 under seat subs or mid bass speakers. The front doors and under seat speakers are wired together from the headunit. I.e 4 outputs from headunit and six speakers. The bit one accepts 8 hi level inputs. So Front L + R into channel one and two, and Rear L + R into channel three and four. Now the front L+R and rear L+R signals will be processed before being fed to the amp, but my question is that the under seat subs cant be plugged into the bit one because there is no separate feed from the headunit. Does this mean that I will have to use the amp to tweak the signal for the subs and just have the bit one processing front and rear signals only? Would love some advise on this. Thanks
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10-20-2013, 11:37 AM	#2
ctuna Lieutenant General 1911 Rep 13,103 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	You need to split the doors from the floors You need to split the doors from the floors. I am not familer with the audison but splitting the doors from the floors is whats done to improve the system . there is a Y connections in the kick panels I believe where the wiring from the Head Units splits and one side goes to the doors and one to the floors. So this requires at least one 4 channel amp for the front speaker sets. If you have the base system the head units signals run into the processor then the output signals go into and amp and the outputs of the amp run to speakers. If you want to do the multichannel surround thing then you need more amps and speakers. See the build threads examples and study. YOur processor should be able to take the front Head Unit channels and generate the proper frequency's for the bass speaker , midbass or anything with its crossover setups. It should be able to tailor any pair of output channels (or output channel for subs)to and amp for the appropriate frequency range also a good amp such as a Jl 600/6 can do the same with its crossover network. http://www.e90post.com/forums/showthread.php?t=641323 study the base system setup and look for other base installs on the site. Like this one http://www.e90post.com/forums/showthread.php?t=445266 With the proper harness no wires need be cut. Last edited by ctuna; 10-20-2013 at 12:05 PM..
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10-21-2013, 10:55 AM	#3
Snoopy Singh Private 6 Rep 93 Posts Drives: 06 E92 335D Join Date: Jan 2013 Location: Scotland iTrader: (0)	Thank you for your response. I will look into this and study further. Cheers
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10-21-2013, 12:06 PM	#4
bmw325i Major General 223 Rep 5,120 Posts Drives: 2006 BMW 325i Join Date: Oct 2010 Location: United States iTrader: (8)	You need Technic's base harness. It will get the signal from the headunit before it gets split off, so the front channels will be full range. You don't need the signal from the rear channels unless you have pdc. The Bit One should separate the channels for you as ctuna said. Technics harness should also come with the jumpers for the under seats, and you'll have to run new speaker wires to them. The rest of the speakers will be connected using factory wiring and Technic's harness.
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