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Some advice on amp for subs

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  • Some advice on amp for subs

    Hey just bought two new 12" Alpine Type R, and they are rated at 500W RMS, and i was looking for an amp today to handle them.

    Would two of these do?:

    KENWOOD KAC-9102D 1700 WATT MONO AMPLIFIER
    # Amplifier Type: Mono
    # RMS Power: 500W x 1 @ 4 ohms
    # THD at 4-Ohm RMS Power: 0.08 %
    # RMS Power: 850W x 1 @ 2 ohms
    # Speaker Level Inputs: Yes
    # Preamp Outputs: Yes
    # Built-In Crossovers: LP
    # Bass Boost: 0 - 18 dB
    # Frequency Response: 5-200 Hz
    # Signal to Noise Ratio: 100 dB
    # Fuse Rating: n/a

    Cheers guys...

  • #2
    Why 2? Why not just run one? Yes, two would produce more power than one (about 15%) but is it worth 2x the cost and current draw?

    Keep in mind that since the 2 speakers can handle 1000 watts, and the amplifier produces 850 at 2 ohms, does not mean that the speakers can handle whatever you toss at them. You still have to pay attention to distortion.

    Also, that power rating is probably for a sealed enclousre with 1.25 cu/ft per speaker. That number lowers when you use a ported or bandpass enclosure
    Take my advice: Do not try to build a system that includes EVERY feature. Start with the basics, build it to a bug free state, and THEN add on.

    Comment


    • #3
      Type R subs deserve better

      Jan Bennett
      FS: VW MKIV Bezel for 8" Lilliput - 95% Finished

      Please post on the forums! Chances are, someone else has or will have the same questions as you!

      Comment


      • #4
        (read as what she said)
        Never let the truth get in the way of a good story

        Comment


        • #5
          Originally posted by Red GTi VR6
          Type R subs deserve better

          What would you suggest mate? Well i love my base and thats why i bought two...

          Also i don't want to waste these subs in a universal box, should i make one up or will any car store be able to do a better job?

          thanks

          Comment


          • #6
            Originally posted by LowLux
            What would you suggest mate? Well i love my base and thats why i bought two...

            Also i don't want to waste these subs in a universal box, should i make one up or will any car store be able to do a better job?

            thanks

            http://cgi.ebay.com/Brand-New-in-Box...QQcmdZViewItem
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            Comment


            • #7
              I would suggest something a little more high end than a Kenwood

              JL AUdio
              Alpine V12 (2 of these would kick ***: http://www.alpine-usa.com/en/product...model=MRD-M605 or if money is an issue: http://www.alpine-usa.com/en/product...model=MRP-M650 two of those)
              The PG would work

              I have just never been a big fan of Kenwood...they make OK product, but that's about it IMO, nothing great.
              Jan Bennett
              FS: VW MKIV Bezel for 8" Lilliput - 95% Finished

              Please post on the forums! Chances are, someone else has or will have the same questions as you!

              Comment


              • #8
                if you can swing it: http://www.alpine-usa.com/en/product...odel=MRD-M1005

                would probably work, but I understand it's "expensive" to some budgets

                just don't skimp on the amp, whatever you do, don't skimp on it!
                Jan Bennett
                FS: VW MKIV Bezel for 8" Lilliput - 95% Finished

                Please post on the forums! Chances are, someone else has or will have the same questions as you!

                Comment


                • #9
                  Hey, would you consider these kenwoods skimping?

                  the amp you suggested second only puts out 400W x 4ohms (0.08 THD) and 600W x 2ohms.

                  the kenwoods are 500W x 4ohms (0.08 THD) and 800W x 2ohms?
                  Sorry i don't understand this, are you just going by the quality of the brand, because i got the impression more RMS Watts to the sub = Better.

                  I was looking at buying one Alpine V12 and running them both from that, but im sure the 2 kenwoods would be better?

                  Cost is a thing for me, i didn't want to cap $2500AU when setting up my system:

                  Already bought:
                  Sony Xplode Headunit: $370
                  Kicker 6x9" Speakers: $100
                  2 x Alpine R Type 12" Subwoofers: $565

                  Still Need:
                  Kicker 6" Speakers: $115
                  2 x Approx. 500W RMS Amps: $700
                  Touchsreen 8" Moniter: $350
                  Wiring & Installation: $300
                  Sub Boxes: $150

                  ...

                  thanks guys...

                  Comment


                  • #10
                    Sorry, would this Kenwood be better than the one i first suggested, i would have to bridge both of them, but its cheaper and says it would output 500W @ 4ohms the same as the first one...

                    KENWOOD KAC-7252 1000 WATT 2-CH AMPLIFIER:
                    # Amplifier Type: 2-channel
                    # RMS Power @ 4 Ohms: 170W x 2 @ 14.4V
                    # THD at 4-Ohm RMS Power: 0.08 %
                    # Bridged RMS Power @ 4 Ohms: 500W x 1 @ 14.4V
                    # Speaker Level Inputs: Yes
                    # Preamp Outputs: Yes
                    # Built-In Crossovers: HP/LP
                    # Bass Boost: 0 - 18 dB
                    # Frequency Response: 10-45,000 Hz
                    # Signal to Noise Ratio: 100 dB
                    # Fuse Rating: n/a

                    Comment


                    • #11
                      I wish it were as simple as wattage, but it's not

                      wattage deffinately matters, but it's not the end all be all in car audio, there are a lot more things to look at

                      chances are the Kenwoods aren't CEA2006 rated, the alpines are - which means the power claims by the kenwood aren't guaranteed, the alpnes power ratings are

                      btw - which version of the subs did you get? dual 2s or dual 4s? because that will make all the difference in the world.

                      hands down the alpine v12 is a better quality product than the kenwood

                      each amp that I posted is an option

                      your sub configuration will determine which amp you need to go with
                      Jan Bennett
                      FS: VW MKIV Bezel for 8" Lilliput - 95% Finished

                      Please post on the forums! Chances are, someone else has or will have the same questions as you!

                      Comment


                      • #12
                        They are the "Dual voice coil 4ohm x 4ohm"

                        How would this be to run both subs:

                        PHOENIX GOLD XENON 1200.1 AMP 1200W RMS:

                        High efficiency (greater than 80%) Class D Operation
                        Buffered RCA full range thru output
                        Remote Monitoring Display (RMD) port
                        Low Pass Level control ready (LPL-44)

                        1200W X 1 RMS @ 1-4 ohms


                        ???
                        thanks

                        Comment


                        • #13
                          sure, if you're trying to keep things cheap

                          Jan Bennett
                          FS: VW MKIV Bezel for 8" Lilliput - 95% Finished

                          Please post on the forums! Chances are, someone else has or will have the same questions as you!

                          Comment


                          • #14
                            Not the answer i was looking for....
                            Heres the simple question:
                            What would be better to run 2 x 12" Alpine R Type Subs?

                            1 x PHOENIX GOLD XENON 1200.1 AMP 1200W RMS

                            or

                            2 x KENWOOD KAC-9102D MONO AMPLIFIER 500W RMS

                            Comment


                            • #15
                              which one has more fusing built in?
                              two $300 amplifiers does not equal one $600 amplifier

                              two $400 amplifiers equals one $600 amplifier

                              in a general sense

                              I honnestly do NOT like Kenwood. IMO they don't make a quality product. It's a mid to low level product. PG on the other hand....at least makes a half decent product.
                              Jan Bennett
                              FS: VW MKIV Bezel for 8" Lilliput - 95% Finished

                              Please post on the forums! Chances are, someone else has or will have the same questions as you!

                              Comment

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