Recent content by amail

If you still want 4 units per box against the wall, but don't like downward-firing drivers into the floor, you can make the 4th woofer fire upward (don't let the cat climb up on it though; some suitable grille - which I dislike - can help). The box shouldn't be a cube, an upright shape (or...

> About 80-100 Hz. So you'll have to run it for some 1-1.5 octaves Regardless, even one pure sine wave freq. will "break" up and flex the cone, though with less disastrous results than a combined multy-freq. signal. Several compliments of such waves and you already have a Doppler effect too. No...

Well, the Behringer NX3000 (https://www.behringer.com/product.html?modelCode=P0CHS) IS a class D amp.

frequency, that is.

At what upper frew. do you hope/wish to cut off the subs?

>I agree none of them is outstanding, which is why I'm asking if they're very far off from a renowned driver like the Ultimax line. I guess they're fine for the price. Keep those cheap drivers from their max excursion and max perforformance as far as possible, and you are likely to be okish...

Just a qwick headup on the 3 units you posted. None of them are "outstanding", but of the three I would take the W.32.500.8.MC. None of them have adequate coil diameter (not even the 18"), but life is compromises. Luckily they are vented magnets. You won't find concave caps at this price range...

For a given woofer that can be used in either a ported or sealed box, the volume of the sealed box would generally be smaller. By quite a margin. Personally I prefer sealed boxes as, among many other factors, the rollof frequency is milder and smoother.

To Umikuse reply: ***Everything*** else being equal, more drive units will physically travel less than one. How much less? Double the units (cone area) - half the travel. Double it again - half it again. Etc. So in a room where you want a certain sound pressure, more drive units will travel...

Since you've decided to go with multi-multiple woofers, use the golden rule regarding cheap or cheaper drive units: use them about 1/4-1/5th of their rated max travel. Good expensive units tend to display good linear performance at or near their max travel, cheap units won't. Deficiencies in...

Not quite clear to me how spreading woofers around the room will improve things, apart from arrival times, which in themselves add a new set of problems. Acoustically measure your room when done and you will be surprised by the "jungle" of interference, so best to minimise variables as much as...

As a real life result, you'll need to remember that nothing you design/calculate will work as intended on paper. Reality/room has its own rules. The best you can do is design your enclosures as per manufacturer's guidelines. When ready, acoustically measure the room's sound (mic, software) and...

Having some 15 years experience with AMT as well as ribbon and quasi ribbon replacements for dome tweeter, it is almost certainly a problem of xover frequency. Even if on paper the AMT is happy to work from the same xover as the dome did, it sounds like that frequency is too low. AMT/quasi...