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  1. AngrySailor

    New build for shop system

    Most places back home are delivering free due to coronAIDS... might be worth a call?
  2. AngrySailor

    New build for shop system

    Wal-Mart for mdf? I meant Home Depot or Rona or whatever. Doubt Wal-Mart will carry construction stuff like mdf? I don’t think you’ll tell the difference between 30,33 or even 36hz without measuring equipment.
  3. AngrySailor

    New build for shop system

    And don’t be shy with the bracing, glue and screws. If something has any chance to vibrate, it will.
  4. AngrySailor

    New build for shop system

    Particle board will be tough to work with... any of the box stores should stock 3/4” MDF... I believe I settled on 33hz tuning. If you tune too low, unless you’re playing music that reaches down there, the cabinet will never get into resonance and act like a large sealed box. When the cabinet...
  5. AngrySailor

    New build for shop system

    That’ll work. You might want to put a few stringers to stiffen the sides. It’s amazing how much mdf will move over large unsupported panels.
  6. AngrySailor

    New build for shop system

    That’ll work. You might want to put a few stringers to stiffen the sides. It’s amazing how much mdf will move over large unsupported panels.
  7. AngrySailor

    New build for shop system

    Billboard You don’t necessarily build to the resonant frequency of the driver. That specification is the resonant frequency of the cone in free air... it’s a function of the moving mass of the speaker, mass of the air it’s displacing and the stiffness of the speakers suspension. This along with...
  8. AngrySailor

    New build for shop system

    Procedure sounds right, the resistor method is said to be more accurate. How much I have no idea and it’s probably not enough to matter. Ball park is fine unless you’re going for competition SPL with music based on your tuning frequency, a few Hz isn’t a big deal.
  9. AngrySailor

    New build for shop system

    Put approximately 5 to 10 ohm resistor in series with the speaker. DMM across the resistor set to voltage AC. Use a signal generator connected to your amplifier and turn the gain up until you have a few volts across the resistor (watch the wattage rating of your resistor). As you sweep the...
  10. AngrySailor

    Carver PT 2400

    Yep, two Mx3000’s. That mono switch is same as the “parallel” switch on most commercial gear. Drive both channels non bridged from one channels input. Usually you can use the second channels input as an output to “daisy chain” another amp.
  11. AngrySailor

    Carver PT 2400

    That’s a beast. Same power numbers as my QSC Mx3000’s. The two of those will trip the shops double 30a breaker on a big bass note. They’re one on each hot so the breaker is balanced even...
  12. AngrySailor

    New build for shop system

    Yes 3/4” MDF. I used a router for these cabinets although I did use a jig saw for the previous 18” build. I cut all the driver holes (8) and all the port holes (16) with one carbide tipped bit. I used the protective 1/4” sheet that came with my lift of MDF (ask the hardware store for a piece...
  13. AngrySailor

    New build for shop system

    I’ve only run mine on one of my big amps so far which gave me 400w/driver. I pushed the amp till clip lights were just blinking for hours. You could just feel the dust caps were above ambient room temp. Magnets were negligible for heat. With both amps wired in, I will have 600w/driver available...
  14. AngrySailor

    New build for shop system

    I’ve been away at work and only thrashed on them a week maybe? I had no problems in that time and was happy with things over all. Model RVW1800P* * is either 4 or 8 depending on VC resistance you want.
  15. AngrySailor

    One for Pops...

    The ball was not secured. I will have the spindle out again next time I’m home for a looksie and see how things are doing. I wonder if the single point contact into a comparatively soft metal or if there is a sharp edge machined into the bottom of the well causes it to have higher friction...
  16. AngrySailor

    One for Pops...

    It looks to me that they were trying to achieve an oil film between the ball and cup on the end of the spindle. The ball sits on the aluminum bottom of the well as single point contact which I think would have higher friction than the two hard surfaces with oil film between. Likely dimples into...
  17. AngrySailor

    One for Pops...

    LOSE INCHES IN HOURS!
  18. AngrySailor

    One for Pops...

    The spindle shaft on the Prisma is cupped where it sits on the ball.
  19. AngrySailor

    One for Pops...

    What about a signal generator timing the strobe? Sync it up and measure your pwm frequency.
  20. AngrySailor

    One for Pops...

    Cool thanks Jim. The table is coming from the dealer who originally sold it and I am told it has been fully inspected, serviced and set up. Also the tone arm has upgraded wiring and counter balance. The shop apparently sends their new tone arms to a place in the UK who does these mods. Now...
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