Musical Subwoofer.... ported or sealed? - Page 2 - diyAudio
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Old 20th September 2011, 10:23 PM   #11
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Quote:
Originally Posted by nonsuchpro View Post
I will be using the O-Audio Bash amp with the EQ section. Can I achieve this by boosting the lows?
Hmmm...

I'm not familiar with that particular bit of kit, but a LT circuit is a very precise tool, as it matches the driver's roll-off exactly (including any resonant peak before the roll-off), which is often more than can be said for most plate amps.

It's not a particularly difficult bit of circuitry to sort out, and it sounds like it'd drop straight in to the plate amp itself, so I think I'd just go for that.

Some say that setting it for Q=0.5 is best for room integration. I support that setting, merely because it uses less gain (saves power, excursion, etc)

Chris
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Old 20th September 2011, 10:26 PM   #12
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Quote:
Originally Posted by chris661 View Post
Hmmm...

I'm not familiar with that particular bit of kit, but a LT circuit is a very precise tool, as it matches the driver's roll-off exactly (including any resonant peak before the roll-off), which is often more than can be said for most plate amps.

It's not a particularly difficult bit of circuitry to sort out, and it sounds like it'd drop straight in to the plate amp itself, so I think I'd just go for that.

Some say that setting it for Q=0.5 is best for room integration. I support that setting, merely because it uses less gain (saves power, excursion, etc)

Chris
Well if I can figure out how to do it I'll look into it. I'm not to good with mods... heh.
Here's the amp O Audio - 500W BASH Subwoofer Amplifier
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Old 3rd October 2011, 10:11 AM   #13
ODougbo is offline ODougbo  United States
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Somebody on the thread said it would need a long port.

55mm x 160mm, looks on the small end, may even whistle.


Vb = 54.71 liters
Fb = 25.86 Hz
F3 = 28.39 Hz
Fill = normal
No. of Vents = 1
Vent shape = round
Vent ends = one flared
Dv = 55 mm
Lv = 160 mm
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Old 3rd October 2011, 06:29 PM   #14
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Quote:
Originally Posted by ODougbo View Post
Somebody on the thread said it would need a long port.

55mm x 160mm, looks on the small end, may even whistle.


Vb = 54.71 liters
Fb = 25.86 Hz
F3 = 28.39 Hz
Fill = normal
No. of Vents = 1
Vent shape = round
Vent ends = one flared
Dv = 55 mm
Lv = 160 mm
This is what bass box spit out... I didnt try it. I went with the red curve on the first post.
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Old 3rd October 2011, 06:37 PM   #15
ODougbo is offline ODougbo  United States
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Sound a little wimpy, sounds like it could handle 2 - 55mm ports, but longer. I like the orange response curve.
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Old 3rd October 2011, 07:08 PM   #16
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I my self only do Ported cabs but I tune to 30-35 Hz. and I also only use brands that I know work. some work better then others. some are just junk in any cabinet. .
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Old 3rd October 2011, 07:26 PM   #17
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all done or are you open to ideas.
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Old 3rd October 2011, 08:24 PM   #18
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Quote:
Originally Posted by nonsuchpro View Post
Hey all Beating a dead horse here I'm sure

I have a Dayton Audio RSS265HF-4 10" Reference HF Driver I'm building a box for. This driver is considered best suited for a vented box but I want to go sealed because I already have a ported (actually, passive radiated) HT Sub that is great. However, I cant stand it for music so I'm looking to build a very musical sub. Here are the different responses from ported and sealed according to BassBox. The box will be 2.5cu and I tuned the port to 30hz.

Which would you go with strictly for music playback?

Orange=Ported
Red=Sealed
Click the image to open in full size.
Thanks!
Try 1 cu ft in a sealed box. The -3dB point is 35Hz. Nice and smooth rolloff. Group delay is less than 8ms too. Maximum output is excursion limited to about 111dB @ 270 watts.
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Old 3rd October 2011, 08:27 PM   #19
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Here's the results, at 270watts input. Black line is FR, blue is group delay, red is excursion, and purple is phase.
Attached Images
File Type: jpg Dayton RSS265HF-4 sealed.JPG (65.8 KB, 509 views)
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Old 3rd October 2011, 08:30 PM   #20
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Quote:
Originally Posted by revboden View Post
all done or are you open to ideas.
I've built 3 boxes. 12x12x12, 16x12x18 and 18x12x24. (the 12" # on all 3 is the height due to desk limitations) I like the 12x12x12 best, it's only .6cf internally but it's giving me what I want for music.
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