View Full Version : bandpass superior?

12-29-2002, 10:35 PM
Ok, attached is my so-called in-depth study into what I can do with my current subs...

I was just about to purchase hx2's and a JBL bp1200.1, but due to personal reasons (incredible amount of debt due to credit card bills), I can't afford crap except maybe plenty of MDF, so now I'm thinking of scrapping my current box and making a new one...

the following graph shows the gain as shown in WINisd...

2 X RFP-1810 drivers (10" 8ohm 200RMS)

THe SPL graph is nearly identical... from the gain and SPL, I'd take bandpass anyday..but hey, I'm sure there's more to it than lines that fly high above sealed and ported...

my amp cuts at 80Hz, so I'm not worried about anything after that... please take a look, especially Jmac... what's your opinion on this?

The phase plot and group delay lines look very funny with the bandpass though... but I don't understand that part, therefore, I've ignored it completely.

I don't have a great deal of power to push my subs well, so I gotta go for an enclosure that gives me performance with less power than desired.

Purple is the bandpass

2.9 Cu.Ft
32Hz (2 X 3" X 10.35")

1.5 Cu.Ft
60Hz (2 X 3" X 4.72")

Blue is the vented box

1.5 Cu.Ft
40Hz (slot port : 2.36" X 10.59" X 22.8")

Green is a sealed box (0.75 CU.Ft)

The yellow vertical line is the 80Hz low-pass cut-off

12-30-2002, 01:57 PM
i'd prolly go with bandpass

12-31-2002, 07:03 PM
bandpass ***** unless it is made absolutely PERFECT to spec......which isn't going to happen. So i'd go with JMAC....ported offers twice as loud as sealed and can still sound good if tuned low....29hz
my 2cents


01-03-2003, 02:10 AM
dont go bandpass unless u can do it PERFECT... ported is more forgiving and sealed is the most forgiving for newbie builders

01-03-2003, 02:25 AM

01-03-2003, 02:26 AM
hey, i have bandpass and it sounds barely decent...

01-03-2003, 02:27 AM
muhahahaha my box owns ur box

01-03-2003, 02:31 AM
well i also have a custom built 1.6 cubic feet box built by me so blow a goat lmao j/m

01-03-2003, 02:33 AM
how many cubes on ported side and how many cubes on the sealed side answer that muhhaahhahahahahahahahahahaha

11-23-2004, 11:20 PM
bandpass enclosure measurement during the desighn stage are critical as are in manufacture of the box.

if the physical box sizes are out within .5 or 1 mm ur bass could fly out the window.

only build it if you KNOW you can

personally i think u should go the ported box

11-23-2004, 11:23 PM
Holy Old Thread Batman!!!!!!!!!!!!!!!!!!!!!