cherrybeard Posted July 4, 2007 Share Posted July 4, 2007 Hi, am thinking of upgrading the bass sounds but not sure how to go about it. Already got a 12" mtx running bridged from a jbl gto 75.2 amp from sony headunit and it is quite good but never quite sure how loud to turn it up without blowing it. Only reason im so careful is that it was all birthday pressie from girlfriend otherwise i would just test its limits the hard way. On a side note does anyone know how to go about using an oscilliscope (and maybe where to get/hire one from) to set up the sub properly. Have heard that there is a sine wave which goes square when distortion is heard so you turn teh gain back far enough to make a nice curve and theres your ideal setting? So anyway upgrading the sounds...I only have one aux output on stereo so is there a aux splitter cable available or will this spoil sound quality?Would it be better to run another sub from the same amp or seperate amp for the new sub? If two amps then the above question would need addressing. As always, thanks in advance for replies. Link to comment Share on other sites More sharing options...
Coonper Posted July 4, 2007 Share Posted July 4, 2007 If you have a 2 channel amp you could run a sub off each channel, but obviously less watts per channel. Or the better option is to buy a twin pre-out cable which turns 1 output to 2! Then run another amp to power your other sub. But the jbl amp is probably capable of running 2 less powerfull subs. Not that im an expert in this field! A lot of it is new to me aswell! Link to comment Share on other sites More sharing options...
Tez162003 Posted July 4, 2007 Share Posted July 4, 2007 simple, you want to amps (both for subs) low frequency but only one sub out, just make sure the next amp you get has both an rca input and an output which means you can plug the existing amp into it, making the amps run in a circuit! Link to comment Share on other sites More sharing options...
cherrybeard Posted July 4, 2007 Author Share Posted July 4, 2007 have just had a quick look at the amp manual and it says that it has a full range aux output on it that can be used to connect additional amplifiers. Do you think it would be ok to run another sub/amp from this output? Link to comment Share on other sites More sharing options...
Tez162003 Posted July 4, 2007 Share Posted July 4, 2007 yep is that on the amp you have now or the new one? its just an rca output, any amp can be connected to this, (how do you think companies with vans that have 60 amps connect them! so basically yeah go for it! but for the power and grounds use a distribution block, and the remote cable, just run an extra wire of the first amp to the second amps remote input, (its only a low current to tell the amp to turn on!) run the remote in series like you will the rca's oh, and the power wire used now, if its an 8 gauge power and ground wire, i would recommend upgradeing the a thicker 4 gauge wire, these are in the higher power amp kit things, or just buy of a reel! this is because you will be running 2 currents worth of power from the wire, then just run 8 gauge out of the distribution block to each amp! other option is to run 2 seperate 8 gauge wires from the battery (fused), the key is both the ground and the power wires need to be the same gauge! Link to comment Share on other sites More sharing options...
cherrybeard Posted July 4, 2007 Author Share Posted July 4, 2007 cheers for that, rca output is on my current amp (havnt bought a new one yet)am tired now so will mull it over till the morning. dont let the bugs bite and all that... Link to comment Share on other sites More sharing options...
rogerthecabbyboy Posted July 5, 2007 Share Posted July 5, 2007 you won't blow a sub unless you are getting distortion and allowing it to play that way, it is very hard to cook a sub from too much power provided the signal is clean(i.e not distorted). using that amp it would sound pants driving another sub ( believe me a mate done it!!). Daisy chaining the RCA's from amp to amp is a great idea and a lot easier if you can do it!! In theory, you could run two of them amps off 8 guage with a single 60amp fuse holder under the bonnet but it would be borderline, as mentioned best to use 4 gauge thru a distributor block and power them that way.If it was me and i was going to buy another amp i'd save for a monoblock to drive both subs and then use the gto 75.2 for front components or (perish the thought!!) 6x9's for louder midrange. If in doubt ask your local ICE shop(not halfords), professional advice doesn't cost a thing!! Link to comment Share on other sites More sharing options...
Stu Posted July 5, 2007 Share Posted July 5, 2007 roger.. you're the first person i've seen on here that actually knows what destroys subs! kudos.. People look at me strange when I tell them to run a larger amp than what their subs are rated at (by say 120%).. Link to comment Share on other sites More sharing options...
rogerthecabbyboy Posted July 5, 2007 Share Posted July 5, 2007 i know the local ICE retailers quite well and they have educated me Link to comment Share on other sites More sharing options...
ECA Posted July 5, 2007 Share Posted July 5, 2007 roger.. you're the first person i've seen on here that actually knows what destroys subs! kudos.. People look at me strange when I tell them to run a larger amp than what their subs are rated at (by say 120%).. Yep, dead right always better to overpower a sub (or any speaker for that matter) than underpower it and run it distorted - its called headroom. . Link to comment Share on other sites More sharing options...
Stu Posted July 5, 2007 Share Posted July 5, 2007 Do you know why though, ECA? Link to comment Share on other sites More sharing options...
ECA Posted July 5, 2007 Share Posted July 5, 2007 Do you know why though, ECA? What why its better to overpower or why its called headroom? Link to comment Share on other sites More sharing options...
Stu Posted July 5, 2007 Share Posted July 5, 2007 The former! Link to comment Share on other sites More sharing options...
rogerthecabbyboy Posted July 5, 2007 Share Posted July 5, 2007 distortion causes heat in the coils whichs leads to failure as i was told Link to comment Share on other sites More sharing options...
Stu Posted July 5, 2007 Share Posted July 5, 2007 Damnit Roger.. I was asking ECA!! Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now