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Thread: Center Channel

  1. #1
    Veteran Member Three Rings
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    Center Channel

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    Curious how others account for the center channel when replacing speakers and adding aftermarket amplifier. Thinking of replacing front door speakers in a B6 A4 and adding an amp to power them but from what I understand the center channel is tied into these so wondering how the sound stage will be impacted.

  2. #2
    Veteran Member Four Rings mad70sx's Avatar
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    Ditto. In the same boat as you. Installed a Pioneer head unit and it is way too much for the stock front speakers to handle. I had to set the bias to 90% R/10% F in order to not blow out the front speakers.
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  3. #3
    Stage 3 Forum Advertiser Four Rings Christian@enfig's Avatar
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    Quote Originally Posted by mad70sx View Post
    Ditto. In the same boat as you. Installed a Pioneer head unit and it is way too much for the stock front speakers to handle. I had to set the bias to 90% R/10% F in order to not blow out the front speakers.
    1st problem
    Since it sounds like you don't have Bose then the cutting you are experiencing is because you did not disconnect the center channel speaker. Since the center channel speaker is powered across both front speakers it makes the Pioneer front speakers cut out when put too loud (clipping).

    2nd problem

    The reason your rears are low is because the factory radio put our a higher voltage than the aftermarket one. That is why we added a HILO to our harness.
    It's all explained here.

    http://enfigcarstereo.com/radio-inst...odel=A4/S4/RS4

    https://enfigcarstereo.com/ENFIG_SRWH_AUD2_HILO.html

    The Hilo box fixes all the low audio issues that your A4/S4 has. The factory radio output is about 6 Volts. Most aftermarket radios have a 2V output so the factory amp receives a much lower signal than the factory radio was sending. If your radio has 4V outputs we still recommend getting the HILO to get better sound out of your new radio. The smaller box is the CAN box. It handles all the steering wheel controls (with a SWCL) without any of the programming issues that some of the competition has, especially with the rolling steering wheel controls. The small box also reads the cars CAN-BUS signal and provides switched 12v (turns the radio on and off), llumination (dims the radio when you turn on your lights). Reverse, parking brake and VSS are not compatible with your car since the car does provide them through CAN-BUS.

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  4. #4
    Stage 3 Forum Advertiser Four Rings Christian@enfig's Avatar
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    Quote Originally Posted by my1stturbo View Post
    Curious how others account for the center channel when replacing speakers and adding aftermarket amplifier. Thinking of replacing front door speakers in a B6 A4 and adding an amp to power them but from what I understand the center channel is tied into these so wondering how the sound stage will be impacted.
    Unless you are super OCD I would just disconnect it. I have never heard a difference.
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  5. #5
    Veteran Member Four Rings mad70sx's Avatar
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    Quote Originally Posted by Christian@enfig View Post
    1st problem
    Since it sounds like you don't have Bose then the cutting you are experiencing is because you did not disconnect the center channel speaker. Since the center channel speaker is powered across both front speakers it makes the Pioneer front speakers cut out when put too loud (clipping).

    2nd problem

    The reason your rears are low is because the factory radio put our a higher voltage than the aftermarket one. That is why we added a HILO to our harness.
    It's all explained here.

    http://enfigcarstereo.com/radio-inst...odel=A4/S4/RS4

    https://enfigcarstereo.com/ENFIG_SRWH_AUD2_HILO.html

    The Hilo box fixes all the low audio issues that your A4/S4 has. The factory radio output is about 6 Volts. Most aftermarket radios have a 2V output so the factory amp receives a much lower signal than the factory radio was sending. If your radio has 4V outputs we still recommend getting the HILO to get better sound out of your new radio. The smaller box is the CAN box. It handles all the steering wheel controls (with a SWCL) without any of the programming issues that some of the competition has, especially with the rolling steering wheel controls. The small box also reads the cars CAN-BUS signal and provides switched 12v (turns the radio on and off), llumination (dims the radio when you turn on your lights). Reverse, parking brake and VSS are not compatible with your car since the car does provide them through CAN-BUS.


    Correct, I do not have the Bose option in my car. I actually used your ENFIG_SRWH_AUD2_HILO harness as well as your install kit. (great products, btw. made the installation easy) I set the HILO as described in your instructions and I have no issues with the rear speakers.

    I guess is it's not as simple as installing a new set of front speakers that can handle a more powerful head unit since the center speaker is in the way, wiring wise.

    My question would be is how do you go about disconnecting the center speaker?
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  6. #6
    This might not be what you want to hear, but when I went full active, I ran new wires. The factory wiring is all there still, and when I would turn on the system (Pioneer 80PRS) the center would come on. So I just turned off the internal amp and the center channel is off now! Much better now. But if youíre using a factory radio Iím not sure how to turn off the center other than pulling it out of the dash and disconnecting it.


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  7. #7
    Stage 3 Forum Advertiser Four Rings Christian@enfig's Avatar
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    Quote Originally Posted by mad70sx View Post
    Correct, I do not have the Bose option in my car. I actually used your ENFIG_SRWH_AUD2_HILO harness as well as your install kit. (great products, btw. made the installation easy) I set the HILO as described in your instructions and I have no issues with the rear speakers.

    I guess is it's not as simple as installing a new set of front speakers that can handle a more powerful head unit since the center speaker is in the way, wiring wise.

    My question would be is how do you go about disconnecting the center speaker?
    Thanks man. The instructions are actually incomplete. They new ones will read that if you do not have Bose to match the rear speakers that go through the HILO to the level of the fronts. (all except convertibles)

    To cut the center channel speaker you have to either fully disconnect it at the dash. Of if your look at the factory front speaker wires behind the radio. If there are 2 wires in one pin the thinner one is the center channel. You just have to cut it and tape it off. Just one of the 2 thin wires. IF they are the same size then you have a 50/50 guess.
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  8. #8
    Veteran Member Four Rings mad70sx's Avatar
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    Quote Originally Posted by Christian@enfig View Post
    If there are 2 wires in one pin the thinner one is the center channel. You just have to cut it and tape it off. Just one of the 2 thin wires. IF they are the same size then you have a 50/50 guess.
    I think I remember seeing this. I still have to pull the head unit at some point to install and wire in the back up camera. Once I get around to doing it and pull the head unit out again, I will take a look.

    Also, are the updated instructions available on your website?

    Thanks for your help!
    JHM Tune ~ JHM Version 2 Headers ~ FI/JHM 2.5" Exhaust ~ Bilstein PSS9 Coilovers ~ BBS CH

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  9. #9
    Stage 3 Forum Advertiser Four Rings Christian@enfig's Avatar
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    Quote Originally Posted by mad70sx View Post
    I think I remember seeing this. I still have to pull the head unit at some point to install and wire in the back up camera. Once I get around to doing it and pull the head unit out again, I will take a look.

    Also, are the updated instructions available on your website?

    Thanks for your help!


    ENFIG SRWH-AUD2-HILO
    The red switched 12v wire is a low 1amp wire. Do not use it for anything other than turning on the radio. Cutting into this wire will void your warranty.
    Speaker Connector
    Green Left rear speaker +
    Green w black stripe Left rear speaker -
    White Left front speaker +
    White w black stripe Left front speaker -
    Grey Right front speaker +
    Grey w black stripe Right front speaker -
    Purple Right rear speaker+
    Purple w black stripe Right rear speaker -
    Power Connector
    Yellow Constant 12V (always on)
    Red Switched 12V (on and off with key)
    Black Ground
    Orange Illumination
    Loose Wires
    Mint green Parking brake
    Pink VSS (Vehicle Speed Sense)
    Purple w white stripe Reverse wire
    Blue/White Factory Amplifier Turn On input

    Connect the Steering wheel control lead before connecting the vehicle harness.
    The 12 pin connector is for the radio specific Steering wheel control lead.
    The steering wheel control lead is sold separately
    The 14 Pin Connector off the little black goes to the vehicle harness
    The new radios RCA Ports are not used with this device.
    The large black box with the 20 pin connector is the built in HILO. The 4 knobs on the other side adjust the volume received by your factory amplifier. Our recommendation is 1/3 - 1/4 half way on all channels for bose. For non Bose match the front speakers. Adjusted clockwise from low to high
    This unit has software that allows you to hang up and pick up calls from the radio. As long as you have the rolling steering wheel controls. Double press the button next to the volume wheel to hang up/end call Short press to pickup. A long press will activate voice dial.
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  10. #10
    Veteran Member Four Rings mad70sx's Avatar
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    Thank you!
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    Always dirty, always broken

  11. #11
    Veteran Member Three Rings
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    If I intend to keep a factory radio, Symphony II+, would I be disconnecting the thing wire as described above?

  12. #12
    Stage 3 Forum Advertiser Four Rings Christian@enfig's Avatar
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    Quote Originally Posted by my1stturbo View Post
    If I intend to keep a factory radio, Symphony II+, would I be disconnecting the thing wire as described above?
    This is only needed when replacing the factory radio or amps.
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  13. #13
    Veteran Member Three Rings
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    Quote Originally Posted by Christian@enfig View Post
    This is only needed when replacing the factory radio or amps.
    Thanks Christian. I plan on replacing the front door speakers and putting in an amp to power the doors and a sub.

  14. #14
    Stage 3 Forum Advertiser Four Rings Christian@enfig's Avatar
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    I would just disconnect it.
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