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FS in Los Angeles: two high-end sealed 12" aluminum cone subwoofers w/ 1kW amp- $635

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  • FS in Los Angeles: two high-end sealed 12" aluminum cone subwoofers w/ 1kW amp- $635

    We recently got a large piano, and that required a reconfiguration of the stereo and so despite how much I've enjoyed these, I have to let them go.

    It's two 55 liter sealed boxes, each with a DVC 4 ohm (so in series for 8 ohms) TC-1000 (later known as the Epic series) with the aluminum cone, shorting rings, 22mm of xmax, and a strong enough motor to not need a huge box, resulting in a Qtc of 0.62 for each box. Boxes are 18" x 16" x 17" HWD.

    The subwoofers are in parallel for a final 4 ohm load, and driven by a Keiga 52100 amplifier which has a 1000W RMS output at 0.1% THD for a very healthy 500 WRMS to each subwoofer. It additionally has a 25 Hz. boost, which is excellent for home theater, especially when used in conjuction with room EQ (always best to EQ down, not up, so the boost in the first place really helps with the low-end roll-off). This has a switching output stage that is nearly 90% efficient, and a linear power supply, so it weighs a solid 30 lbs. Was used externally. Amp has an auto-on that works very well - always comes on even with little signal, and does NOT turn off after a few minutes in the middle of a song/movie.

    Between having two separate boxes which helps flatten out the room response (and is much more flexible than one huge box), and having basically unlimited dynamic range and extension from having so much volume displacement, this has been one of the best subwoofer solutions I've ever had. Definitely local pickup in Los Angeles only due to weight/bulk!

    Per Unibox simulation software, this models at 107db at xmax at 20 Hz., and over 112db at 30 Hz. That's anechoic/without room-gain!

    Driver specs (this took a long time to find):
    Fs 23.00 Hz
    Re 7.60 Ohm
    Qms 3.90
    Qes 0.49
    Sd 500.0 cm2
    Vas 97.0 l
    Xmax peak 22.00 mm
    Le 2.49 mH
    Le2 0.00 mH
    Re2 0.00 Ohm
    Nominal Power 500.0 W

    here's the slightly later DVC 2 ohm version of this driver, when they changed the name to Epic, and put their logo on the cone:

    Amplifier specs:

    Looking for a firm $635, which is non-negotiable. Pickup only as this is big and heavy.


  • #2
    Very nice setup. I may of over looked this. But what’s your location?


    • #3
      Originally posted by carlthess40 View Post
      Very nice setup. I may of over looked this. But what’s your location?
      "FS in Los Angeles: two high-end sealed 12" aluminum cone subwoofers w/ 1kW amp- $635"

      I may be wrong, but I think it is Los Angeles!
      “I cried because I had no shoes until I met a man who had no feet”

      If we all did the things we are capable of doing, we would literally ASTOUND ourselves - Thomas A. Edison

      Some people collect stamps, Imelda Marcos collected shoes. I collect speakers.:D


      • #4
        July bump - happy premature 4th everybody!

        (Thanks for the clarification, Eric! Still have that one speaker grille I forgot to give you for the 10" sub box...)


        • #5
          Happy August everybody! Still available, but the amplifier is now the rackmount Dayton SA-1000 with one band of parametric EQ and 12V trigger - oh boy! Same price, same great deal!


          • #6
            If one desires stereo (2 channel) bass/low-frequency reproduction, I can swap a Stewart HPA-1000 pro-audio amplifier instead of the mono/1 channel Dayton one. Amplifier puts out 500 watts RMS @ 2 ohms, so the same 1000 watts to both speakers. Amplifier is a rugged pro-audio unit, convection cooled, with a switching power supply and a 2-step class H output stage (2 voltage rails of conventional class AB). The Dayton would produce superior results (because it's mono) but if one wants stereo low frequency reproduction than I can swap for the Stewart amplifier for $100 less (so $535 for the package). Which is an even more outrageously good deal. That option would absolutely require a home theater processor though as the amplifier has no crossover or controls - not even gain controls. So a home theater/processor/mixing desk subwoofer out is required.


            • #7
              Still available at $535 for 2 channel and $635 for mono with parametric EQ, 25 Hz. boost, 12V trigger, etc.

              Happy September, everyone!



              • #8
                If one already has amplifiers/processing - I can sell just the two passive subs without any amplifier for $435.

                $635 with Dayton SA1000 mono sub amp with EQ, low-pass filter, 25 Hz. boost, auto-on, etc.

                $535 with pro-audio 2 x 500 Stewart HPA 1000 amplifier, no processing whatsoever - not even gain controls.

                $435 just the two subs



                • #9
                  Sold locally, thanks!


                  • #10
                    Actually, if anyone needs a nice beefy 12" subwoofer cabinet, I have two Apogee pro-audio units. Bought to replace the 2 x 12" above, (wasn't sure if I wanted to try for two, so I got two just in case) but am using only one. Selling both would mean I'll have to finally make the box I want, so that's good too.

                    Here's my copy/paste from my local Craigslist ad:

                    So I have one L-1 enclosure with the original (and good) Eminence driver in it for sale, and another I'm using with a different driver in my stereo/home theater at home. $75 for the single box, firm.

                    If you're absolutely looking for a pair of them, I can sell the other one as well (both for $145 firm), but give me some time to take out my driver and put the original Eminence one back in.

                    These are solid, well-made enclosures, tuned somewhere in the 30s, with quality drivers. Specs below:

                    16.5" (419 mm) wide by 22.5" (572 mm) high by 15" (381 mm) deep
                    120 / 480 watts continuous / peak

                    Originally part of a very high end 3 way actively amplified pro-audio theater room system called the MPTS-1; original specifications here:

                    Here are the specs from Madisound for the nice Eminence drivers that are in them - they model REALLY well for a tiny sealed box (two of them in a 44 L Q = 0.7 box!) :

                    W1238R 12" Poly Cone Woofer

                    Fs 21.48

                    Impedance 6 ohm

                    Mmd 86.5 Grams

                    Cms 586.39 m/n

                    Vas 236.55 Liters

                    Rscc 4.9 Ω

                    Leap Krm 3.368

                    Leap Kxm 28.125

                    Leap Erm 0.868

                    Leap Exm 0.738

                    vcL 2.84mH @ 1K

                    Bl 15.38 Tm

                    Qms 6.599

                    Qes 0.262

                    Qts 0.252

                    Xmax 8.0 mm Peak

                    SD 0.0533 m2

                    Surround Rubber

                    Magnet 40 oz.

                    Voice Coil 2 Inch

                    Power Handling 150 watts

                    Freq. Response 25—1000 Hz

                    Efficiency 92 dB @2.83V

                    Price $61.00


                    • #11
                      Happy October, everyone! Just got a bit of rare rain in Los Angeles, so the plants are happy.


                      • #12
                        Happy November!

                        Price drop for Apogee bass cabs/pro-audio 12" subs: still $65 for the one but $125 for the both - oh boy! Local pickup in Los Angeles only.