Advice on a 15"+ sealed subwoofer design
Hi,
I've been searching the web the last few weeks looking for a design that fits my requirements, but I haven't found what I'm looking for yet. I will be using the sub for both HT and 2ch. stereo. I have no size constraints on the sub, but I want it to be sealed. I'm also planning to use active equalization to extend the low frequency response.
I would like to buid a sealed box using either a 15" or 18" woofer. I've already purchased a 1000W plate amplifier for the project. I'd like to limit the driver price to <$300. Ideally the -3dB point would be 25Hz or lower. The current listening room is abot 15'x20'.
With the large plate amplifier and active equalization, is there any reason to build a larger box. With the power ratings of the woofers I'm finding in this price range, it appears that I won't be able to fully utilize the amp unless I build a higher Q box.
Initially I was planning to use an AV15 for the design, but I've had trouble getting in touch with the supplier.
Anyways, any suggestions on box designs or driver selection would be greatly appreciated.
Hi,
I've been searching the web the last few weeks looking for a design that fits my requirements, but I haven't found what I'm looking for yet. I will be using the sub for both HT and 2ch. stereo. I have no size constraints on the sub, but I want it to be sealed. I'm also planning to use active equalization to extend the low frequency response.
I would like to buid a sealed box using either a 15" or 18" woofer. I've already purchased a 1000W plate amplifier for the project. I'd like to limit the driver price to <$300. Ideally the -3dB point would be 25Hz or lower. The current listening room is abot 15'x20'.
With the large plate amplifier and active equalization, is there any reason to build a larger box. With the power ratings of the woofers I'm finding in this price range, it appears that I won't be able to fully utilize the amp unless I build a higher Q box.
Initially I was planning to use an AV15 for the design, but I've had trouble getting in touch with the supplier.
Anyways, any suggestions on box designs or driver selection would be greatly appreciated.
good luck!i was in the same boat.the suppliers either don't return you calls or emails or have no stock.i finally settled for the dayton15" titanic and it's seized.woofer will not move.
the only suggestion i can give you is
http://www.soundsplinter.com/
quick and helpful responses.i just couldn't stand that silly "x" on the woofer
the only suggestion i can give you is
http://www.soundsplinter.com/
quick and helpful responses.i just couldn't stand that silly "x" on the woofer
Since you're in US, try http://www.ascendantaudio.com
They have many drivers in your price range. Call them, they don't answer much to emails afaik.
If you use active equalization, you need a huge amplifier like you have. In a situation where your driver is using 100W for a 40 Hz sinewave, it might require 1000W with active EQ at 20 Hz to achieve the same loudness.
The size of the box with active EQ is less important, but a larger box will be more efficient so you'll have more headroom with your amplifier.
They have many drivers in your price range. Call them, they don't answer much to emails afaik.
If you use active equalization, you need a huge amplifier like you have. In a situation where your driver is using 100W for a 40 Hz sinewave, it might require 1000W with active EQ at 20 Hz to achieve the same loudness.
The size of the box with active EQ is less important, but a larger box will be more efficient so you'll have more headroom with your amplifier.
Have you looked at the Adire subwoofers?
http://www.adireaudio.com/Home/TempestSeries.htm
http://www.adireaudio.com/Mobile/KodaSeries.htm
Here's a US source: http://www.acoustic-visions.com/~acoustic/products/subwoofer_drivers/by_brand.shtml
http://www.adireaudio.com/Home/TempestSeries.htm
http://www.adireaudio.com/Mobile/KodaSeries.htm
Here's a US source: http://www.acoustic-visions.com/~acoustic/products/subwoofer_drivers/by_brand.shtml
I dont know anything about these
http://www.acoustic-visions.com/~acoustic/products/subwoofer_drivers/index.shtml
http://www.oaudio.com/TC2_PLUS.html
Or else I think Visaton have nice moderate 12" woofer
http://www.acoustic-visions.com/~acoustic/products/subwoofer_drivers/index.shtml
http://www.oaudio.com/TC2_PLUS.html
Or else I think Visaton have nice moderate 12" woofer
Or this "mysterious" Meniscus - they have a 12" and if its any good you could take two pr side
http://www.meniscusaudio.com/speakercomponents/
http://www.meniscusaudio.com/speakercomponents/
If I were in the market for a sub..... I'd go with a Koda 15" sealed from www.creativesound.com. Yeah, Thiele Small parameters are unavailable.... but it's XBL^2..... and you can measure T/S parameters to calculate the optimal box size (I say go low-Q and use as little EQ as you can)
tinitus said:
Indeed !
There is a 18" model with rather generous +-13mm linear excursion. Not bad for a PA driver. Efficiency is also ok, inductance low, response good up to 200Hz. Any idea of the price?
Jussi
Hi Jussi, I have mailed a request asking for price - I will inform when I get an answer
They claim that it will be -3db down at 30hz in a 150Liter closed box, and think of it at 96db
Also I like that its a single voicecoil 8 or 4 ohm
They claim that it will be -3db down at 30hz in a 150Liter closed box, and think of it at 96db
Also I like that its a single voicecoil 8 or 4 ohm
96dB with an f3 of 30Hz in a 150 litre box? Methinks not. If it were that easy..... life would be good 🙂 Maybe with optimal room interaction.
badman said:
What's wrong with the numbers? That's for instance the standard numbers for the NHT1259 in a 117 l box. F3 below 30 Hz. With higher SPL...
Ok, easier in what way??
What I think is remarkable and usefull is the flat impedance between 100-1Khz
Could this indicate a weak "motor", or are they just very skilled
How do you think they will work in closed box
What I think is remarkable and usefull is the flat impedance between 100-1Khz
Could this indicate a weak "motor", or are they just very skilled
How do you think they will work in closed box
It just seemed like the opinion was that it was hard to achieve F3 at 30 Hz. Few drivers do that in a closed box, AFAIK, but with BR there are many. That makes it easier.
UrSv said:
You seem to be confusing max SPL with efficiency. Max SPL takes excursion and power handling. Efficiency is different, typically requiring lighter diaphragms, stronger magnets, larger surface areas, and bigger boxes. The NHT is more like 88dB range, vs. 96, in terms of efficiency.
Not at all. I simply misunderstood due to reading to hastely. I thought you were discussing SPL and not sensitivity. My bad and I should've understood that since 96 dB is not a lot, unless it's sensitivity that is.
Frequency response BMS 18" - well I may not have been totally wrong about that - it says about the 18" "neo" driver with +/-13mm linear stroke that its measurements are specified in 150liter closed box - Vb/Fb 150 L/ 28hz - seems to me it is almost straight down to 30hz
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