Originally Posted by Fatawan
I find some of the claims for the THT somewhat, ummmmm, unbelievable. Such as this quote directly from the website:Not impressed yet? Add in the cabin gain of an average room (12dB per octave below 30 Hz) and you end up with flat response to 1Hz with 110dB sensitivity. Not even the most expensive theatrical subs made can make that claim.
Flat to 1Hz....with the $150 driver.....and some cheap plywood....ok
Astute observation. The Table Tuba page also says "You want a horn loaded home theatre sub that can deliver over 110dB at 20 Hz".
IMO, both of these claims are not responsible, and are there to lure audio knowledge deficient folks into buying plans (worked for me when I bought the TT plan almost 2 years ago).
The TT may hit 110dB at 20Hz, but with so much THD that it would sound like total ass. I can only get low 80s dB-wise at 20Hz before I decided that more power in was not the answer to good sound for a TT. A good highpass is.
The THT may be able to do the 1Hz thing in a sealed concrete bunker, but saying that 1 Watt will give you 110dB at 1m at 1Hz in a typical room is kinda 'off', IMO. The quotes further down the page for the THT both say that useful output for the THT is in the teens (one of them mine), so that should temper the 1Hz claim.
The 1Hz claim is even stranger coming from the very person who does not believe that sub-15Hz content is important."A word about response below 15 Hz.
If you have a speaker capable of doing so, and the necessary test gear, run a 12 Hz sine wave though the system to a 105dB level, outdoors so that you'll hear the speaker and not the house vibrating around you. Do an RTA to see what's in the output; if you have a direct radiating speaker you'll see that you don't have a pure 12Hz sine wave, you've got 12Hz plus a lot of harmonics. If you've got a folded horn the harmonic content will be lower, but it will still be there. And now, as to what you'll hear: not much. If not for the meter telling you it's there, and the whoosh of air rushing about, you'd be hard pressed to tell that there's anything there at all. What you do hear is those harmonics. And that's why I'll never build or design a cab with the intent of going lower than THT, unless one of you is nuts enough to pay me my $2,000 one-off fee.
Yes, some DVDs have content below 15 Hz, and measuring gear can detect it. You can't. If you think you can that's all well and good, but just as you can't get around the physics of how large a speaker must be to reproduce those frequencies you also can't get around the physics of how large your eardrums, ears and head must be to hear them. If you crave the low frequency vibrations, get some Butt Shakers"
That being said, these designs DO NOT NEED these exagerrated claims. They work VERY well. They are great bang-for-buck. If you are on a budget, I cannot think of a better deal. If you need above 30Hz, TT. If you want more extension and volume, THT. Just like any other design, they have strong points and weak points.
If you have stud and drywall walls, you won't get as much room gain as myn gets with cinder block construction.
Either way, how else can you get low distortion playback to 20Hz (and depending on your room, lower than 20Hz) at reference level at your listening position for $400?