fatalus Posted June 6, 2008 Share Posted June 6, 2008 Just finished installing a pair of component JL Audio VR speakers front, but I have the feeling that the crappy BOSE amplifier is not feeding them enough. Decided to get one JL Audio G2250 amplifier for the front speakers to stick under the passenger seat. Everything is understood concerning the power wires, but I have some questions about the speakers and HU wiring with my new amp. I need to bypass the BOSE amp for the front speakers but how do I connect the new amp to the pre-amp signal of the BOSE HU? Where do the cables have to pass through and where do they connect with the HU? Also I want to use the existing speaker wire installation. Where do I connect the speaker-outs of the amps with the existing speaker wires? Quote Link to comment Share on other sites More sharing options...
H5 Posted June 7, 2008 Share Posted June 7, 2008 Sorry to say, it's not that easy..... The BOSE unit puts out a signal at a mid level, and not at RCA level. In other words, you need an aftermarket headunit to run the amp. Using the standard speaker wire and not putting Dynamat in the door behind the speaker (as a minimum) you are probably only getting about 70% of the benefit of your new amp / speakers. Quote Link to comment Share on other sites More sharing options...
fatalus Posted June 7, 2008 Author Share Posted June 7, 2008 The JL audio amp has differential balanced inputs that are supposed to accept any type of signal, so I guess I will not even need an adapter for this. I think my biggest problem will be finding the way to do the wiring. Anyone who has done it maybe?? I have already ordered a large piece of Dynamat to put behind the sub and also behind the door speakers so I hope it will do some good Quote Link to comment Share on other sites More sharing options...
H5 Posted June 7, 2008 Share Posted June 7, 2008 I think you'll find the output of the BOSE unit sits between the JL differential presets of low and high...... Might work. But no-one here has done a BOSE unit through aftermarket amp AFAIK. There are tutorials on JL's website and the instruction manuals are normally pretty good. Or have a word with the supplier of the amp. All authorised JL retailers go on their training etc. so should be able to help you. Quote Link to comment Share on other sites More sharing options...
fatalus Posted June 7, 2008 Author Share Posted June 7, 2008 The worst case scenario is to be forced to use a Line converter according to the specialist shop, although I am optimistic that it will work as it is. In JL audio site they specifically mention BOSE OEM systems that mostly benefit from these balanced inputs. I will keep u informed though about the process of the installation! Quote Link to comment Share on other sites More sharing options...
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