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  1. #1

    Default toggle switch on remote wire for car amps


    this is what i want to do. if someone could draw up a nice detailed wiring diagram to help me better understand it, id really appreciate it

    ok first offi know some of you guys dont agree with all the mids/highs im going to run in my car, im just looking for someone to help, so please, no arguments.

    ok, so, in my car, ill have a total of 3 amps. they're on order so theyll be here soon

    i have the 18" sub, 16 6.5s in the front cabin, and 16 tweets in the front cabin.

    in the back (behind the wall in the cargo area) i will have 2 sets of components (or 4 coax, whatever i decide on) for shows or whatever.

    the front 16 mids will be powered by a single 2 channel amp.

    the front 16 tweets will be powered by a single 4 channelamp, BUT the tweets will only use 2 of those channels. that leaves me with channel 3 and 4 left for the mids in the cargo area.

    now, what i want is:

    -a toggle switch on the sub amp's remote wire, to turn it off when im only using the mids out back

    -a toggle switch on the front mids 2 channel amp so i can turn that off when im only using the mids out back

    now, for the final 4 channel amp, this is what i need:

    i need 2 toggle switches. one for the first 2 channels (the front tweets)

    and one for the second 2 channels (the 4 mids out back)

    that way i can turn off channel 1 and 2 (front tweets) and leave channel 3 and 4 on (mids out back)


    if i put a switch on the remote wire, it will turn off all 4 channels, thats not what i need.

    sorry for all the bold's lol, just trying to make it as least confusing as possible.

  2. #2
    Join Date
    Dec 2006
    Location
    Taylorsville, UT
    Posts
    175

    Default Re: toggle switch on remote wire for car amps


    > this is what i want to do. if someone could
    > draw up a nice detailed wiring diagram to
    > help me better understand it, id really
    > appreciate it

    > ok first offi know some of you guys dont
    > agree with all the mids/highs im going to
    > run in my car, im just looking for someone
    > to help, so please, no arguments.

    > ok, so, in my car, ill have a total of 3
    > amps. they're on order so theyll be here
    > soon

    > i have the 18" sub, 16 6.5s in the
    > front cabin, and 16 tweets in the front
    > cabin.

    > in the back (behind the wall in the cargo
    > area) i will have 2 sets of components (or 4
    > coax, whatever i decide on) for shows or
    > whatever.

    > the front 16 mids will be powered by
    > a single 2 channel amp.

    > the front 16 tweets will be powered
    > by a single 4 channelamp,
    > BUT the tweets will
    > only use 2 of those channels. that
    > leaves me with channel 3 and 4 left for the
    > mids in the cargo area.

    > now, what i want is:

    > -a toggle switch on the sub amp's remote
    > wire, to turn it off when im only using the
    > mids out back


    > -a toggle switch on the front mids
    > 2 channel amp so i can turn that off when im
    > only using the mids out back


    > now, for the final 4 channel amp, this is
    > what i need:

    > i need 2 toggle switches. one for the
    > first 2 channels (the front tweets)

    > and one for the second 2 channels (the 4
    > mids out back)

    > that way i can turn off channel 1 and 2
    > (front tweets) and leave channel 3 and 4 on
    > (mids out back)


    > if i put a switch on the remote wire, it
    > will turn off all 4 channels, thats not what
    > i need.

    > sorry for all the bold's lol, just trying to
    > make it as least confusing as possible.

    Use the remote wire FOR SURE so you don't accidentally forget to turn off all of your stitches one night only to come out to a dead battery the next morning!

    If it were me I would use the remote wire as the switch signal for a bunch of relays (one for each seperate toggled line that you want to use). Then use one relayed signal per amp as the switched line for that amp. That way you can add switches to your new remote lines (after the relays) without switching off the source relay line while at the same time eliminating the risk of draining your battery while the vehicle is off.

    You should be able to find automotive relays for 2 or 3 bucks a pop online or at your local car audio shop (they usually have hordes of extras laying around that weren't needed in car alarm installs).

  3. #3

    Default Re: toggle switch on remote wire for car amps


    > Use the remote wire FOR SURE so you don't
    > accidentally forget to turn off all of your
    > stitches one night only to come out to a
    > dead battery the next morning!

    > If it were me I would use the remote wire as
    > the switch signal for a bunch of relays (one
    > for each seperate toggled line that you want
    > to use). Then use one relayed signal per amp
    > as the switched line for that amp. That way
    > you can add switches to your new remote
    > lines (after the relays) without switching
    > off the source relay line while at the same
    > time eliminating the risk of draining your
    > battery while the vehicle is off.

    > You should be able to find automotive relays
    > for 2 or 3 bucks a pop online or at your
    > local car audio shop (they usually have
    > hordes of extras laying around that weren't
    > needed in car alarm installs).

    ya, thats what i want to do. i want them to all come on with the car on, and shut off when i turn it off, i just want the ability to turn them on and off when i want, even if the radio is still on. i want to be able to control each one individually.

  4. #4
    Join Date
    Dec 2006
    Location
    Taylorsville, UT
    Posts
    175

    Default Re: toggle switch on remote wire for car amps


    > ya, thats what i want to do. i want them to
    > all come on with the car on, and shut off
    > when i turn it off, i just want the ability
    > to turn them on and off when i want, even if
    > the radio is still on. i want to be able to
    > control each one individually.

    If you use the relays to create new remote lines with the original remote line as the switch for the relays you will be able to add the switches you want to the new remote lines after the relays.

    Here's a hypothetical:

    I think you said you will have 4 amps. Here we go:

    take your remote line from the back of your deck and use whatever method you deem worthy to split that line into four different lines. You will need 4 relays, one for each amp.

    Using a 30 amp SPDT relay, connect terminal #87 to constant 12 volts positive. Connect terminal #85 to ground, terminal #86 to one of your 4 ends of the remote turn on wire from the head unit, and terminal #30 to The amp that will be switched by the relayed signal (this line, coming from the relay to your amp, is were you will add your toggle switch).

    Now repeat that process for each of the remaining three relays. This will create 4 individualy switchable remote lines to activate your amplifiers with. Now set it up so that each amp has its own relayed remote signal and there you ahve it 4 individually switchable amps.

    For illustrations on how to wire the relay check out the link sixth section down titled "Connecting Additional Devices to the Remote Turn On Wire":

    <A HREF="http://www.the12volt.com/relays/page5.asp">http://www.the12volt.com/relays/page5.asp</A>

  5. #5

    Default Re: toggle switch on remote wire for car amps


    > If you use the relays to create new remote
    > lines with the original remote line as the
    > switch for the relays you will be able to
    > add the switches you want to the new remote
    > lines after the relays.

    > Here's a hypothetical:

    > I think you said you will have 4 amps. Here
    > we go:

    > take your remote line from the back of your
    > deck and use whatever method you deem worthy
    > to split that line into four different
    > lines. You will need 4 relays, one for each
    > amp.

    > Using a 30 amp SPDT relay, connect terminal
    > #87 to constant 12 volts positive. Connect
    > terminal #85 to ground, terminal #86 to one
    > of your 4 ends of the remote turn on wire
    > from the head unit, and terminal #30 to The
    > amp that will be switched by the relayed
    > signal (this line, coming from the relay to
    > your amp, is were you will add your toggle
    > switch).

    > Now repeat that process for each of the
    > remaining three relays. This will create 4
    > individualy switchable remote lines to
    > activate your amplifiers with. Now set it up
    > so that each amp has its own relayed remote
    > signal and there you ahve it 4 individually
    > switchable amps.

    > For illustrations on how to wire the relay
    > check out the link sixth section down titled
    > "Connecting Additional Devices to the
    > Remote Turn On Wire":

    > <A HREF="http://www.the12volt.com/relays/page5.asp">http://www.the12volt.com/relays/page5.asp</A>

    cool, that helped me out alot, thanks!

    now, i MAY run 4 amps, but as of now, i will only have 3. your method above will work for the first 2 amps, but the 3rd amp will be a 4 channel amp.

    what i need on that 4 channel amp is TWO switches. one to turn on/off the first 2 channels, and one switch for the rear channels.

    is that possible (rather than turning the ENTIRE amp on/off at once?)

  6. #6
    Join Date
    Sep 2005
    Location
    Indiana
    Posts
    19,612
    Blog Entries
    29

    Default Is the 4ch a dual PSU?


    Sometimes you have 2 sets of PSU terminals on a 4ch amp. If you don't then other methods are necessary. I understand what you want to do. If it were me, I would use a relay for this also, but on the outputs of the 4ch amp. Do like Hershey said, and set up for multiple relays, but place the switch contacts as the connection to the amplifier speaker outputs When you throw the switch off, the relay contacts will separate, and stop the output. Follow?
    Later,
    Wolf

  7. #7

    Default Re: Is the 4ch a dual PSU?


    thats what i was thinking, would the line that goes to the speaker outputs (from the relay) only go to the positive output, and just leave the negative speaker wire directly to the amp?

    > Sometimes you have 2 sets of PSU terminals
    > on a 4ch amp. If you don't then other
    > methods are necessary. I understand what you
    > want to do. If it were me, I would use a
    > relay for this also, but on the outputs of
    > the 4ch amp. Do like Hershey said, and set
    > up for multiple relays, but place the switch
    > contacts as the connection to the amplifier
    > speaker outputs When you throw the switch
    > off, the relay contacts will separate, and
    > stop the output. Follow?
    > Later,
    > Wolf


  8. #8

    Default Re: Is the 4ch a dual PSU?


    the amp is an MTX ta7804

    if i do that above with the relays, where would i put fuses? (from #87 to 12v, do i put a fuse)

    <A HREF="http://www.mtx.com/caraudio/products...hunder7804.cfm">http://www.mtx.com/caraudio/products...hunder7804.cfm</A>

  9. #9

  10. #10
    Join Date
    Sep 2005
    Location
    Indiana
    Posts
    19,612
    Blog Entries
    29

    Default Re: Is the 4ch a dual PSU?


    > would this work?

    >
    > <A HREF="http://img.photobucket.com/albums/v1...x/b5c9b4d9.jpg">http://img.photobucket.com/albums/v1...x/b5c9b4d9.jpg</A>

    Close. I think the diode connection is a sound idea, but with both switches on or the possibility of both switches on, could change the voltage input at the Rem. I am not certain. If all you want to do is switch the speaker connections, place a switch for each set as you have, but place a third for the amp Remote. I don't think you can combine them into one switch action.
    Later,
    Wolf

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