Parts Express Does It Again-Sub Amp Sale

Discussion in 'Archived Threads 2001-2004' started by Ben Ven, Apr 26, 2002.

  1. Ben Ven

    Ben Ven Stunt Coordinator

    Joined:
    Mar 6, 2002
    Messages:
    61
    Likes Received:
    0
    Trophy Points:
    0
  2. Ron D Core

    Ron D Core Stunt Coordinator

    Joined:
    Mar 31, 2002
    Messages:
    158
    Likes Received:
    0
    Trophy Points:
    0
    Nice, I'll be picking up two.
     
  3. Scott Simonian

    Scott Simonian Screenwriter

    Joined:
    Jun 20, 2001
    Messages:
    1,281
    Likes Received:
    0
    Trophy Points:
    0
    Ooooo. Ill have to get one.

    Does anyone know when the sale ends?
     
  4. Chris Tsutsui

    Chris Tsutsui Screenwriter

    Joined:
    Feb 1, 2002
    Messages:
    1,865
    Likes Received:
    0
    Trophy Points:
    0
    Thanks for sharing, I was going to order that same amp for my tempest soon.

    edit: 04/29/02 At 6:00 PM Eastern Time!

     
  5. Scott Simonian

    Scott Simonian Screenwriter

    Joined:
    Jun 20, 2001
    Messages:
    1,281
    Likes Received:
    0
    Trophy Points:
    0
    Uh oh! Do they take orders on the weekend? Does this amp still come with a bass boost?
     
  6. Patrick Sun

    Patrick Sun Studio Mogul

    Joined:
    Jun 30, 1999
    Messages:
    38,777
    Likes Received:
    492
    Trophy Points:
    9,110
    Supposedly this model is shipping WITHOUT the bass boost (where R26=56Kohms and R27=120Kohms), but if you wanted to check, if if had the bass boost, the R26=18Kohms, R27=180Kohms.
     
  7. MarkDavidson

    MarkDavidson Stunt Coordinator

    Joined:
    Jul 2, 2001
    Messages:
    96
    Likes Received:
    0
    Trophy Points:
    0
    excellent deal. Just picked up 2.
     
  8. Scott Simonian

    Scott Simonian Screenwriter

    Joined:
    Jun 20, 2001
    Messages:
    1,281
    Likes Received:
    0
    Trophy Points:
    0
    Cool. Thanx Pat!

    YES! A REAL excuse for making a second Tempest!

    Muuuuaaahhahahahahahaahahah!!!!
     
  9. Ryan Schnacke

    Ryan Schnacke Supporting Actor

    Joined:
    Feb 5, 2001
    Messages:
    876
    Likes Received:
    0
    Trophy Points:
    0
    Parts Express is going to send me to the poor house. That's another $100 they've finessed out of my pocket. Darn you, PE!
     
  10. Eduardo

    Eduardo Agent

    Joined:
    Apr 10, 2002
    Messages:
    47
    Likes Received:
    0
    Trophy Points:
    0
    Just started building my Sonosub and how lucky was I to get my amp on sale [​IMG] . The white papers of the Amp show you how to add the bass boost.
    Is the bass boost significant enough to mod the amp?
     
  11. Brian Bunge

    Brian Bunge Producer

    Joined:
    Sep 11, 2000
    Messages:
    3,716
    Likes Received:
    0
    Trophy Points:
    0
    Just for everyone's benefit, I believe that PE now ships these amps standard without any boost. And even if there still is boost, simply state in the comments when you place your order that you want it removed.

    I did this several months ago (before they started shipping without the boost) and they removed the boost at no extra charge. The technician even included his business card stating that he had done the mod.

    Brian
     
  12. Patrick Sun

    Patrick Sun Studio Mogul

    Joined:
    Jun 30, 1999
    Messages:
    38,777
    Likes Received:
    492
    Trophy Points:
    9,110
    Does anyone know the Fc of the rumble filter with the R26=56Kohms, R27=120Kohms no boost configuration? I'm currently using R26=50Kohms, R27=150Kohms, which results in a Fc=16Hz, but it's too low to protect the driver on hideously low bass material.
     
  13. Jim A. Banville

    Jim A. Banville Supporting Actor

    Joined:
    Jun 20, 1999
    Messages:
    630
    Likes Received:
    0
    Trophy Points:
    0
    Okay, I cancelled my order for the same basic amp from adireaudio.com and got this one. The .pdf file does say that the default resistor setting is for NO bass boost, but I am concerned with sub-sonic bass hurting my woofer. I assume NO boost also has NO sub-sonic filter? I think the Aidre version of the amp has a 1 dB boost. I may go for that. Now, the Shiva is backorder a couple of weeks. Is the Dayton 12" Titantic just as good? My box is approx 3.5 cubic ft. (minus volume of port, driver and amp) w/ a 17" x 4" diameter port.

    thanks

    Jim
     
  14. Michael Do

    Michael Do Agent

    Joined:
    Mar 1, 2002
    Messages:
    27
    Likes Received:
    0
    Trophy Points:
    0
    If you disable the bass boost then the subsonic filter is also defeated. I have a 1dB boost at 31-35Hz with an FC 21 to protect the driver.
     
  15. Patrick Sun

    Patrick Sun Studio Mogul

    Joined:
    Jun 30, 1999
    Messages:
    38,777
    Likes Received:
    492
    Trophy Points:
    9,110
    Michael, is your choice for resistor/config doing the job in protecting the driver? I may also do the R26=39K, R27=150K to get that config (just means swapping out the R26 resistor for me).
     
  16. JohnA

    JohnA Stunt Coordinator

    Joined:
    Oct 25, 1999
    Messages:
    98
    Likes Received:
    0
    Trophy Points:
    0
    I just ordered this amp (thanks for the heads up Ben) and was wondering if I should use a bass boost in my application, a sealed Maelstrom of just over 140 litres (net).

    Does the bass boost implement subsonic filtering? If so, how?

    Thank you for your responses,

    -JohnA
     
  17. Ryan Schnacke

    Ryan Schnacke Supporting Actor

    Joined:
    Feb 5, 2001
    Messages:
    876
    Likes Received:
    0
    Trophy Points:
    0
    The "bass boost" circuit is really a hi-pass filter with Q > 0.7 So the frequency response is pretty flat until you get near the boost frequency. At that point theres a hump in the response that boosts a small range of frequencies. Below that it falls off pretty quickly. I haven't seen the schematics but I'm guessing its 2nd order so that's a 12dB/octave slope that filters out the reeeally low stuff.
     
  18. Cam S

    Cam S Screenwriter

    Joined:
    Jan 11, 2002
    Messages:
    1,524
    Likes Received:
    0
    Trophy Points:
    0
    Awe man, way cheaper than the AVA250 I bought [​IMG] Now I wanna do another sub [​IMG]
    Wow, my 300th post, I wanna be a post whore, hahaha
     
  19. Eduardo

    Eduardo Agent

    Joined:
    Apr 10, 2002
    Messages:
    47
    Likes Received:
    0
    Trophy Points:
    0
    Would the bass boost Mod be good for a First time DIYer? Or will the AMP be ok for my Shiva Sonosub?
     

Share This Page