Home Theater Forum and Systems banner


  1. Need some help with bandpass enclosure specs

    Ported Subwoofer Build Projects
    Hi guys, a little over a year ago you helped me build a monster sub for my theatre so I've returned for further assistance. This time, I need help building a bandpass enclosure for an exterior application (pool / patio). I want it to be bandpass because I plan to bury the main enclosure and...
  2. Does anyone have a bandpass sub in HT?

    Ported Subwoofer Build Projects
    I built a Decware Deathbox II with the dhm108b 10" sub in my car for years. It sounded awesome. http://www.decware.com/newsite/DBK10II.html I moved it into my tv room recently and connected it to a 150w plate amp in an effort to upgrade from my htib sub. It sounds good to me although it...
  3. Horn style bandpass sub

    DIY Subwoofers - General Discussion
    Hi I'm new to this forum I'm designing a horn style bandpass woofer, with twin 6.5" subs in a push pull configuration I'd greatly appreciate any input regarding volume, port size and the overall design
  4. Cheap, Fast and Dirty Bandpass

    Ported Subwoofer Build Projects
    Hey everyone, I built this thing back in the summer and I'm finally getting around to posting about it. I was humming and hawing about what to buy/build for a sub, playing around in WinIsd and skulking in the forums, when I found a Rockford Fosgate Rfd2112 in a pawn shop for $45. Done deal...
  5. JL audio 13W3V3-4 in a 4th Order Bandpass: The best of one world

    Ported Subwoofer Build Projects
    This is a build that is ready,but lately i am more active here. So i like to post it,and get to know some of the other DIY members over here. Its called: The best of one world,because i also use a 13W3V3 in a 40 liter closed box beside it. I called it The best of both world,s using them...
  6. Low Freq Bandpass

    Ported Subwoofer Build Projects
    I would like to build a narrow low frequency bandpass enclosure. I was thinking of using multiple small drivers to get the volume of air movement. The frequency range I would like to cover is from 20hz to no more than 60hz, 50hz would be ok. To get the frontal area that I am looking for the...
  7. Bandpass enclosures??

    DIY Subwoofers - General Discussion
    I have 15 inch driver in a bandpass* (built for this specific driver by a car stereo company-I bought it as a used demo) enclosure; I was told that it doesn't matter which way the driver faces. At present, the driver is facing into the largest (most volume) portion of the enclosure which is...
  8. Bandpass Gain

    DIY Speakers
    My question is whether there could be some bandpass gain created when using a 2 or 3 way passive speaker combined with an Audio Video Reciever which has a built in 2 way active crossover for use with LFE or subwoofer systems? Having worked with 3 way active and passive crossovers for some time...
  9. Small high output bandpass subwoofer build

    Ported Subwoofer Build Projects
    Hello Shacksters :) For quite a number of years i have built mainly bandpass bass, or if you like subwoofer speakers. My interest in this type of bass enclosure design was started when i saw an artical in Electronics World & Wireless World, which was an artical on building a bandpass sub using...
  10. Dr. Geddes - Bandpass Theory - Mal-x

    DIY Subwoofers - General Discussion
    Below is a quote from Dr. Geddes regarding bandpass enclosures. I can not get my brain wrapped around the statement in bold. Can someone smarter than I explain? On paper, the designs usually cover about 1-2 octaves, so thats about 40-100 Hz. But when I measure them in-room they tend to be much...
  11. Bandpass sonotube subs

    Ported Subwoofer Build Projects
    Bandpass subs seem to be a little under-represented (and perhaps unappreciated as well), so here is a pair of 4th order bandpass subs that I finished recently, which were designed to complement my Geddes Abbeys. The port opening is at the top end, covered by grill cloth. There is a ¼” layer...
  12. Sealed, Ported, Bandpass, ABC, Dual-reflex?

    Mobile Audio
    Hello...I'm just looking for some input on a subwoofer box I am about to build. It IS for the car (a van, actually) but my questions concern box types and response in general, so I thought I would get more feedback here. I have a TC-9 motor and 15" 12 spoke frame that I plan on building with...
  13. Single 15" bandpass

    Mobile Audio
    Hi everyone, I'm somewhat new to this. i've been trying to figure out an adequate box volume and port sized for a box I'm trying to build my brother for Christmas. I'm using the unibox spreadsheet and I don't understand the abbreviations. Does anyone know what the Vb1/2 Fb2 and Q mean. I'm...
  14. IXL-18.2.2 Bandpass

    Sealed Subwoofer Build Projects
    I'm thinking of building something different for the IXL18 driver. This bandpass design...... Preliminary details here Large chamber 200 litres / 25hz / pair of 6inch ports Small chamber 60 litres / 53hz / single 6 inch port Output with 1000w applied.... Bandpass in Green Compared to...
  15. Bandpass subs

    Chat Box SWAMP
    Why do 6th-order Series bandpass subwoofers get such a bad press? :blush: (am I up to ten posts yet?) :D