DIY Vented Shiva Project

Discussion in 'Archived Threads 2001-2004' started by Max Payne, Jul 2, 2001.

  1. Max Payne

    Max Payne Agent

    Jun 29, 2001
    Likes Received:
    I currently own a Velodyne CT-150 and i'm thinking of selling it to help build a DIY Shiva subwoofer project.
    The project will be a vented cabinet about 85 liters of internal volume and the sub will be tuned from 20 Hz or around up to 25Hz.
    It will be drivin by a Parts Express plate amp ( # 300-792 )
    It only cost $99 and it has 150 watts RMS into 4 ohms.
    It also has a 5dB bass boost at 35Hz.
    If i built the sub properly would it sound better then a Velodyne CT-150 for home theater ????
    Any input will help out alot , Thanks
  2. James W. Johnson

    James W. Johnson Screenwriter

    May 26, 2001
    Likes Received:
    If i built the sub properly would it sound better then a Velodyne CT-150 for home theater ????>>>>>
    Not much better, I would look into building a Tempest sub in a good sized enclosure with at least a 250 watt amp if you want to beat the CT150 by a decent margin.
    The AVA250 from Adire is only $79 more than the amp you are looking at, and the Tempest is only a few bucks more than the Shiva.
    I would build the sub as follows....
    AVA 250 $179
    Tempest $140
    3.5' of 24" ID Sonotube $24.50 (where I live)
    1/4 sheet of 3/4" MDF $7
    2 tubes of Tightbond construction adhesive $3
    1 quart of paint and a brush $10
    1.5 yards(or so) of fabric $16ish
    24" of 6" ID PVC pipe $2.50(could tune it anywhere from 16-20Hz with this much pipe.)
    binding post from Radio Shack $3.50
    three 6" long feet and three mounting posts(HD) $12
    10' of 12awg regular Monster cable $11
    Grand total $408.50 (plus add in your Tempest and amp shipping charges, gas to go get the other parts you need and an extra $20 incase some of the parts cost more in your add another $50)
    Grand total $458.50
    Unless you are willing to put the Tempest in a big EBS enclosure I would not even bother upgrading, the sub I laid out for you will beat the CT150 hands down from 16Hz on up.
    You should gain a good 10dB from 16Hz to 30Hz (this will seem twice as loud as your CT150)
    James' DIY speakers
  3. JohnA

    JohnA Stunt Coordinator

    Oct 25, 1999
    Likes Received:
    Do you still need the binding posts with the plate amp? I thought the amp was wired directly to the driver.
    I will begin my own Tempest based sub (vented box, Adire Alignment) with the AVA250 amp shortly, Thanks for clarification.
  4. Seungsoo Hwang

    Seungsoo Hwang Stunt Coordinator

    Aug 6, 1999
    Likes Received:
    if you are using a plate amp i see no reason why you would purchase binding posts. Perhaps he was thinking of using an outboard amp?

Share This Page