Announcement

Collapse
No announcement yet.

Soundblaster not pushing my subs...

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Soundblaster not pushing my subs...

    I just completed my carPC install the other day and since then i've been trying to get my sound ironed down....i've got a soundblaster running 5.1 going to two amps (a 4-channel for my speakers and a 2-channel for my subs)

    I've got three 3.5mm to dual rca converters that I got from radio shack plugged into my sound card. The one runs the front speakers, the second one runs the rear speakers, and the third one running the subs.

    I know that the third 3.5 mm port is supposed to be for center/sub....so you have to leave one of the RCA jacks unplugged and only use the sub channel...I checked both channels and am sure that I am using the correct plug (subs work at a really low level on the correct one and dont work at all on the other one)....I have a y splitter running into this rca jack that I plugged the left and right channel of my sub rca wire into.

    The problem is this...the subs barely bump at all...i've messed with the sound card's software, but can't figure it out....the subwoofer level is at max and i've tuned the equalizer. I can hear the subs working, but probably at 10% of what they used to be when I had my HU running them.

    Could this be because my headunit put out more power for the sub channel? Or is it that my amp needs to be retuned to accomodate the change from HU to soundcard?
    PostCount++


    - SrCsTc's Bezel
    - Alpine W200/H701
    - ED Nine.2X
    - OZ Matrix Elites
    - ED Nine.1
    - Idmax 12's

  • #2
    Most definately you will need to turn up your gains on the amp. The sound card is likely putting out 1/10 of the voltage that your headunit was.

    Comment


    • #3
      Originally posted by StrataG
      Most definately you will need to turn up your gains on the amp. The sound card is likely putting out 1/10 of the voltage that your headunit was.

      Thanks...I will definitely try turning this up and see what happens...one more question, does this apply to the amp powering my inside speakers as well? They seem to sound fine to me, but I'm no expert...
      PostCount++


      - SrCsTc's Bezel
      - Alpine W200/H701
      - ED Nine.2X
      - OZ Matrix Elites
      - ED Nine.1
      - Idmax 12's

      Comment


      • #4
        If they sound fine to you, why mess with it? IF you want to be sure, you should set your gains with a multimeter as outlined on various websites (you can Google it). However, if it sounds fine to you, do you need to mess with it?

        Comment


        • #5
          Originally posted by WxGuy1
          If they sound fine to you, why mess with it? IF you want to be sure, you should set your gains with a multimeter as outlined on various websites (you can Google it). However, if it sounds fine to you, do you need to mess with it?
          Just in case...ya know...a real audiophile does get in my car and notice that im not getting the cleanest possible sound out of my setup...also, it might sound fine to me, but it could probably be better, and I wouldn't know that unless I hear it get better...ok, I just confused myself...but I'll definitely try using a multimeter to set them.
          PostCount++


          - SrCsTc's Bezel
          - Alpine W200/H701
          - ED Nine.2X
          - OZ Matrix Elites
          - ED Nine.1
          - Idmax 12's

          Comment


          • #6
            Using a multimeter is great and all, but your ear should be the final test. I personally don't bother with a multimeter because I've never had the greatest results from it. I always just set my volume to 75-80% and then tune my gains with my ear.

            Comment


            • #7
              I was looking into some other options on improving my sound quality and was thinking about either going the DSP route or gettting a line driver or both.

              If I add a DSP like the Panasonic CY-AC300 to replace my soundcard and use the optical out on my via M10K, will this improve my sound?

              I know that some people have suggested using line drivers...does the Panasonic DSP have this built into it?

              If not, would I just be better off with a line driver?
              PostCount++


              - SrCsTc's Bezel
              - Alpine W200/H701
              - ED Nine.2X
              - OZ Matrix Elites
              - ED Nine.1
              - Idmax 12's

              Comment


              • #8
                Originally posted by StrataG
                Most definately you will need to turn up your gains on the amp. The sound card is likely putting out 1/10 of the voltage that your headunit was.
                Or the other solution to this is to add what's called a "line driver". You can get a fancy in-dash one or a fairly plain one that goes inline and can be hidden away.

                The purpose of these is to take the fairly puny output of whatever your source is and bump up the voltage to something more like what your amplifier is expecting to see.

                Comment


                • #9
                  Originally posted by StrataG
                  Using a multimeter is great and all, but your ear should be the final test. I personally don't bother with a multimeter because I've never had the greatest results from it. I always just set my volume to 75-80% and then tune my gains with my ear.
                  ^I don't recommend doing this. Use a multimeter because if you try to do it by ear you could potentially clip your amps without knowing it, and dammage your equipment. First, tune it by a DMM to see what the max your gains can be at before clipping, then tune it by ear making sure you don't go past the maximum output you just set.

                  Comment


                  • #10
                    I never said that it is bad to use a multimeter, I just said when I have, I wasn't happy with the results. I've never had an amp/speaker blow on me, and never had any audible distortion in my systems. Once I tune it at 75-80%, I put it up all the way to see if I hear any bad clipping. If I do, I back down the amps a bit more. Obviously tuning to 75-80% will yield some clipping at full volume, but if I hear bad clipping at 100% I turn down the gains a bit more. The multimeter route has always yielded higher gain settings than I've ever set by ear. Maybe I'm overly cautious with my settings by ear, but I'd rather be anyway.

                    Comment


                    • #11
                      If you trust your ears then you can do it how I tuned my amps.

                      First I played a heavy rock song (which is mainly what I listen to) and set my gains to the maximum volume without clipping to that rock song. Obviously, if I play a song with bass it will clip my amps; so I then played a heavy bass song and watched the DMM to see how fair I can increase my bass knob till it clips my amps.

                      So for my usual rock music I have my bass knob turned all the way up and no clipping occurs, but if a song has alot of bass, I will turn it to the spot that I know that won't clip. I hope that made sense...

                      Here is the formula to see what voltage your amp to put out without clipping:
                      Volts = sqrt(wrms*ohms)

                      Also, just because you don't hear clipping doesn't mean it isn't occuring. I have 2 Avalanche 12's (pretty much same motor as RE's XXX and Adire's Brahma's) and you could be clipping the hell out of that sub and not hear it.

                      Comment


                      • #12
                        Originally posted by 3onDubs
                        If I add a DSP like the Panasonic CY-AC300 to replace my soundcard and use the optical out on my via M10K, will this improve my sound?
                        The difference is night and day. I can't say enough good things about digital output. You won't regret it, and it's a much better choice than a line driver.

                        The M10k has coaxial out, not optical. Both are SPDIF formats, but you will need an inexpensive coax-optical converter to connect to the Panasonic CY-AC300.
                        In progress: M10000; Travla c134; Xenarc 700TSV; Hitachi 80GB 2.5"; 256MB ULP; M2-ATX; ITPS; Powermate; iKEY SL-88 KB; Holux GM-210; Audiobahn ADD51T w/ COAX/optical converter; Road Runner; iGuidance 2.1

                        Comment


                        • #13
                          Originally posted by XxAndyxX
                          Also, just because you don't hear clipping doesn't mean it isn't occuring. I have 2 Avalanche 12's (pretty much same motor as RE's XXX and Adire's Brahma's) and you could be clipping the hell out of that sub and not hear it.
                          As I stated, out of the countless different systems I've had in various cars, I've never blown anything. I've also tested 75% of them with multimeters. The first two for my own relief, and the rest have been for others' disbelief. Out of the 7-8 times I tested it, I never once was over the "safe" level. In fact the times I tried putting it the level the mm would have me believe, it did not have the clarity I wanted. Maybe because I'm plan my setup properly and know what kind of sound I want. I always overpower my system in the sense that I make sure my system will handle more than I will ever throw at it. I rarely put my system up past 50% and it still screams and thumps. Even when I am showing the setup to friends I never put it past 80% and even at 80% I don't leave it there for long.

                          I can easily see some young kid tuning his gains and really trying to push them to near breaking point. Even the responsible ones will most likely lower it just enough so they "think" they won't blow their speakers. For those reading this who are looking to tune their gains, it can definately be done by ear, but you cannot be greedy. Do not try to squeeze every last watt out of your amp, that is how you end up blowing components of your sound system. If you want more power, get more power. If you constantly find yourself listening to your music at near full volume, then obviously taking multimeter readings would be a good idea to double check yourself.

                          Comment

                          Working...
                          X