Need Help on Installing sub with Factory HU
Thread Starter
Melting Slicks
Joined: May 2003
Posts: 3,494
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From: McKinney Tx
Cruise-In V Veteran
St. Jude's Donor '05
Need Help on Installing sub with Factory HU
Can anybody tell me how to install a subwoofer with an existing head unit. A friend of mine said you had to tap a RCA plug??? I plan on purchasing a mono amp to pwr the sub. Any help pointing me in the right direction is greatly appreciated 
Instructor
Joined: Jun 2004
Posts: 112
Likes: 0
Re: Need Help on Installing sub with Factory HU (Rob'sC5)
Rob,
I installed a powered Bazooka tube in my 04 Coupe. You need to purchase a Soundgate LOCB.2 signal level converter and then hook the inputs into the Bose sound processor L and R Sub outs. The LOCB.2 outputs then can be adjusted to the proper level to properly drive your amp low-level inputs. On my 2004 coupe, the Bose sound processor is located under the dash over top the gas petal.
There is nothing standard about the Bose system. The Bose pre-amp and speaker level signal are very low voltage. You will need the LOCB.2 to properly convert the signal level to something your amp can use.
Before I got the LOCB.2, I even tried hooking the Bazooka's low-level inputs to the rear speaker wires. Even the speaker level signals weren't strong enough to drive the amps low-level inputs.
I installed a powered Bazooka tube in my 04 Coupe. You need to purchase a Soundgate LOCB.2 signal level converter and then hook the inputs into the Bose sound processor L and R Sub outs. The LOCB.2 outputs then can be adjusted to the proper level to properly drive your amp low-level inputs. On my 2004 coupe, the Bose sound processor is located under the dash over top the gas petal.
There is nothing standard about the Bose system. The Bose pre-amp and speaker level signal are very low voltage. You will need the LOCB.2 to properly convert the signal level to something your amp can use.
Before I got the LOCB.2, I even tried hooking the Bazooka's low-level inputs to the rear speaker wires. Even the speaker level signals weren't strong enough to drive the amps low-level inputs.
Thread Starter
Melting Slicks
Joined: May 2003
Posts: 3,494
Likes: 0
From: McKinney Tx
Cruise-In V Veteran
St. Jude's Donor '05
Re: Need Help on Installing sub with Factory HU (morepower)
Morepower 
where can I find this part (LOCB.2) at. Will I be able to run the amp inputs into this?
where can I find this part (LOCB.2) at. Will I be able to run the amp inputs into this?
Instructor
Joined: Jun 2004
Posts: 112
Likes: 0
Re: Need Help on Installing sub with Factory HU (Rob'sC5)
Rob,
Logjam Electronics sells it for $89.95. (www.logjamelectronics.com) (765.644.1251).
Here is what the LOCB.2 does:
"The Soundgate LOCB.2 Bose Line Output Converter is the audiophile's choice for adding amplifiers to factory Bose systems, Ford Premium Sound Systems, Lexus and Toyota differential systems - almost any factory amplified system. This 2-channel line output converter is designed to connect to the pre-amp level leads of the factory system before the amplifier. The LOCB.2 is a fully active device and can accept input signals from 350mV to almost 6Volts and give you 2.5 Volts RMS output. No transformers, potentiometers, or power resistors. Flat from 17 Hz to 23 KHz. High voltage output, high input impedance."
On the Bose system on my 2004 Coupe, the factory radio outputs to the Bose Signal Processor which then outputs to the amplified sub speakers in the doors. I located the Bose Signal Processor under the dash just over the gas pedal. I connected the LOCB.2 inputs to the Bose Signal Processor outputs for the Sub Left & Right channels. I then connected the LOCB.2 outputs to my new Bazooka tube amplifier inputs.
I have the shop manual for my 04 vette and was able to locate the proper wires from the Bose Signal Processor. Not sure if the wires are the same for other model years. I can tell you the color of the wires but I would highly recommend you see if the Chevy dealer will look it up for you car instead.
The LOCB.2 also requires 12vdc +/-. I tapped into the power wires for the Bose Signal Processor also.
This mod takes a little bit of study and work. You have to remove the interior center console and lower front panels of the driver side dash. Search the forum for shifter installation instructions. Everything comes appart nicely and goes back together nicely. The shop manual really helps.
Hope this helps.
Logjam Electronics sells it for $89.95. (www.logjamelectronics.com) (765.644.1251).
Here is what the LOCB.2 does:
"The Soundgate LOCB.2 Bose Line Output Converter is the audiophile's choice for adding amplifiers to factory Bose systems, Ford Premium Sound Systems, Lexus and Toyota differential systems - almost any factory amplified system. This 2-channel line output converter is designed to connect to the pre-amp level leads of the factory system before the amplifier. The LOCB.2 is a fully active device and can accept input signals from 350mV to almost 6Volts and give you 2.5 Volts RMS output. No transformers, potentiometers, or power resistors. Flat from 17 Hz to 23 KHz. High voltage output, high input impedance."
On the Bose system on my 2004 Coupe, the factory radio outputs to the Bose Signal Processor which then outputs to the amplified sub speakers in the doors. I located the Bose Signal Processor under the dash just over the gas pedal. I connected the LOCB.2 inputs to the Bose Signal Processor outputs for the Sub Left & Right channels. I then connected the LOCB.2 outputs to my new Bazooka tube amplifier inputs.
I have the shop manual for my 04 vette and was able to locate the proper wires from the Bose Signal Processor. Not sure if the wires are the same for other model years. I can tell you the color of the wires but I would highly recommend you see if the Chevy dealer will look it up for you car instead.
The LOCB.2 also requires 12vdc +/-. I tapped into the power wires for the Bose Signal Processor also.
This mod takes a little bit of study and work. You have to remove the interior center console and lower front panels of the driver side dash. Search the forum for shifter installation instructions. Everything comes appart nicely and goes back together nicely. The shop manual really helps.
Hope this helps.
Thread Starter
Melting Slicks
Joined: May 2003
Posts: 3,494
Likes: 0
From: McKinney Tx
Cruise-In V Veteran
St. Jude's Donor '05
Re: Need Help on Installing sub with Factory HU (morepower)
Rob,
Logjam Electronics sells it for $89.95. (www.logjamelectronics.com) (765.644.1251).
Here is what the LOCB.2 does:
"The Soundgate LOCB.2 Bose Line Output Converter is the audiophile's choice for adding amplifiers to factory Bose systems, Ford Premium Sound Systems, Lexus and Toyota differential systems - almost any factory amplified system. This 2-channel line output converter is designed to connect to the pre-amp level leads of the factory system before the amplifier. The LOCB.2 is a fully active device and can accept input signals from 350mV to almost 6Volts and give you 2.5 Volts RMS output. No transformers, potentiometers, or power resistors. Flat from 17 Hz to 23 KHz. High voltage output, high input impedance."
On the Bose system on my 2004 Coupe, the factory radio outputs to the Bose Signal Processor which then outputs to the amplified sub speakers in the doors. I located the Bose Signal Processor under the dash just over the gas pedal. I connected the LOCB.2 inputs to the Bose Signal Processor outputs for the Sub Left & Right channels. I then connected the LOCB.2 outputs to my new Bazooka tube amplifier inputs.
I have the shop manual for my 04 vette and was able to locate the proper wires from the Bose Signal Processor. Not sure if the wires are the same for other model years. I can tell you the color of the wires but I would highly recommend you see if the Chevy dealer will look it up for you car instead.
The LOCB.2 also requires 12vdc +/-. I tapped into the power wires for the Bose Signal Processor also.
This mod takes a little bit of study and work. You have to remove the interior center console and lower front panels of the driver side dash. Search the forum for shifter installation instructions. Everything comes appart nicely and goes back together nicely. The shop manual really helps.
Hope this helps.
Logjam Electronics sells it for $89.95. (www.logjamelectronics.com) (765.644.1251).
Here is what the LOCB.2 does:
"The Soundgate LOCB.2 Bose Line Output Converter is the audiophile's choice for adding amplifiers to factory Bose systems, Ford Premium Sound Systems, Lexus and Toyota differential systems - almost any factory amplified system. This 2-channel line output converter is designed to connect to the pre-amp level leads of the factory system before the amplifier. The LOCB.2 is a fully active device and can accept input signals from 350mV to almost 6Volts and give you 2.5 Volts RMS output. No transformers, potentiometers, or power resistors. Flat from 17 Hz to 23 KHz. High voltage output, high input impedance."
On the Bose system on my 2004 Coupe, the factory radio outputs to the Bose Signal Processor which then outputs to the amplified sub speakers in the doors. I located the Bose Signal Processor under the dash just over the gas pedal. I connected the LOCB.2 inputs to the Bose Signal Processor outputs for the Sub Left & Right channels. I then connected the LOCB.2 outputs to my new Bazooka tube amplifier inputs.
I have the shop manual for my 04 vette and was able to locate the proper wires from the Bose Signal Processor. Not sure if the wires are the same for other model years. I can tell you the color of the wires but I would highly recommend you see if the Chevy dealer will look it up for you car instead.
The LOCB.2 also requires 12vdc +/-. I tapped into the power wires for the Bose Signal Processor also.
This mod takes a little bit of study and work. You have to remove the interior center console and lower front panels of the driver side dash. Search the forum for shifter installation instructions. Everything comes appart nicely and goes back together nicely. The shop manual really helps.
Hope this helps.
Thanks for the address...I'll checked into that wedsite. I cant wait to start thumpin 
