I'm looking to design a sub that would cost in total $400 or less (preferably less). My main criteria is I want it to play very deep (18-20 hz +/- 3dB) and it has to be musical (home theater volume not a concern). Any recommendations on drivers, amps, and/or plans that could fulfill this project?
Thanks,
Nick
Thanks,
Nick
Forgot to say, I'll want to set its internal crossover to about 50 or 60 Hz. I'd like a fairly flat response from there to 20 hz or under. I only use a stereo preamp/amp so I do need the amp to have its own crossover.
Before setting your low frequency extension requirements you need to investigate the room lift that your listening area will provide. Only very large rooms (over 20 feet or so in the longest dimension) actually require that the speaker be flat anechoic to 20Hz.
k you'll get a decent amount of room gain.
I think maybe a tempest sonosub would fulfill your needs perfectly. Im not sure of the price of a berringer BFD but its a worthwhile adition to anysubwoofer system.
I think maybe a tempest sonosub would fulfill your needs perfectly. Im not sure of the price of a berringer BFD but its a worthwhile adition to anysubwoofer system.
Room lift starts where the longest dimension is a half wavelength, so you'll get it from 35Hz. That means with a sealed sub flat to 35 Hz will be fine; vented you should go to 25-28 Hz to account for the steeper roll off of a vented box.
I would recommend you to build a Adire Audio Tempest subwoofer with a EBS vented alignment.
You will need:
2x Adire Audio FP4 4" Flared ports
1x Rythmic Audio 250W subwoofer amplifier
1x Adire Audio Tempest subwoofer driver
Total cost 323$ shipped at your door + wood + 64 oz of polyfill
But then, it's big, you need space, 48"x24"x24".
You will need:
2x Adire Audio FP4 4" Flared ports
1x Rythmic Audio 250W subwoofer amplifier
1x Adire Audio Tempest subwoofer driver
Total cost 323$ shipped at your door + wood + 64 oz of polyfill
But then, it's big, you need space, 48"x24"x24".
Really? Thats a pretty... bold claim. I take it you've compared the two side by side? If so, can you post your impressions?
Jim York said:
There's no chance that this design could beat a Tempest in a EBS enclosure down low. It's a really well designed horn (Auto Tuba 18"), but it just can't do that.
an auto tuba (single) simply cant compare to the swept volume of a tempest, and the tuba 18 wont even reach infrasonic levels. Then again bills horns are designed for efficiency, and m yhat goes off to him for that! In the pro audio realms they get loud and low. Tempest and the typical horn are completely different animals.
No offence Bill, this is my opinion and feel free to disprove me
No offence Bill, this is my opinion and feel free to disprove me
Nm2285 said:
Simulate it
with this
It will show you both room modes and room gain. Just watch how you enter in the reflectance values of your room. Solid masonry will be 0.9 or higher, framed drywall more like 0.7 probably. This gives better info IMO than generic room response curves. Room gain also is related to placement.
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