Beautiful, musical, accurate sound down below 30 Hz. So cheap I was able to buy two and have true stereo sub-bass.

Lousy speaker clips instead of binding posts.

This is a fine acoustic music sub. It will not be suitable for the mind-numbing thump of disco or the room shaking explosions on movies. If you are looking to add a couple of high quality octaves to the bottom of your bookshelf speakers, these are superb. They are extremely accurate and musical. Tympani, tubas, acoustic bass, and piano just sound great. If you listen to jazz, classical, classic rock, and country, you'll love these. If you're building a disco palace, a hip hop club, or watching a special effects film festival, you'll be disappointed. I know these go down to at least 25 Hz because I have tested them. 25 Hz is the lowest tone on my test CD and the sound meter picked recorded it at only -2 dB. The 25 Hz tone rattles the pictures hanging on my walls. Since the lowest fundamental tone on an acoustic instrument is 28 Hz, these subs do the job just fine. But that's all just meters and numbers. The real test is listening, and everyone who hears them, really likes them. They reproduce real music, not one-note thumps. A stand-up bass on these subs is a thing of beauty.

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Large full range speakers like AR 3a, and Tannoy that didn't need sub-woofers.

Durability, Longevity, Flexability, Clean sound quality

Hard punches, it is a little too smooth.

Combined with Tangent T-10's, T-40's and T-50's by Klipsh and Yamaha's MX-1000 amp, you could not have a better combo in 1991. I'm sad to say that the amp met it's match and is no longer with us. This sub still rocks the house. It's hard to find the flexability this thing gives you.

Sound quality. Ease of setup. Crossover granularity.

L/R RCA input might cut out speaker out on older recievers that only have one Sub out.

Yes, I really paid $92 for this thing, and that included shipping. Private sellers usually end up getting something around $90 for these and tack on $20 for shipping. Ebay "store" sellers usually want upwards of $175 plus shipping, pass on that and wait for another to come up for bids. It's worth the wait. As one of the other reviewers said, if you're looking for a great sub that won't set you back a bunch, haunt ebay and grab one when you can. Plenty of power to handle anything short of an outdoor party blaring hiphop. Have tested this extensively with DTS and DVD-A music tracks and this old guy does an outstanding job, not boomy but a nice, tight bass output. The crossover adjustments allow you more flexibility than you might imagine from a sub this old. Also works well from most room positions, something theoretically the same with all subs not always there in practice. One minor possible problem: the RCA "in" is for left and right and you need to pump some signal into both to take max the sub. Since just about every receiver has a single sub out, you'll need to get a splitter, no problem, easy to get. The manual tells you that if you only have a single "out" to NOT hook it up the way I've just described. Don't worry, it works fine. However, an older receiver might then lose it's L or R main speaker out (according to the manual) but I somehow doubt anything reciever purchased since 1998 will have that problem.

Adjustable crossover Integral amp Magnetic shielding

Minor quibble: The controls are at the bottom of the speaker. They'd be more convenient at the top.

I bought these before "Home Theater" meant Dolby 5.1 Digital sound . . . at that time, adding a set of compact speakers (in my case, Boston Acoustic HD5V's) to the stereo outputs at the back of the TV was considered a good setup by anyone short of a rabid (and wealthy!) audiophile. In any case, I decided I needed a subwoofer, and because of space considerations, it had to be right next to the TX stand. This meant it needed to be magnetically shielded, and the Yamaha fit the bill. It provides plenty of good bass, and compares favorably with anything short of a modern audiophile sub costing multiples of my purchase price. One can set the frequency cutoff and volume, drive it either from the speaker terminals or a subwoofer output . . . the adjustments allow it to be set to match the "main" speakers. Altogether, it does what it's expected to, and does it well.

Sound Looks Adjustablity

Loudness

I got this sub from my grandfathers pre state of the art home theater system. I added it to my current Infinity interlude system, and it sounds great. This truely is a great especially since its from the early 90s. Yamaha!

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Onkyo Infinity Sharp

Verry Powerfull Bass , Room Filling Bass down to 18Hz
Rattle your Bedroom Bass

None

WATTS - 70
FREQEUNCY - 18hz-160hz
WOOFER SIZE - Duel 7 inch paper cone subs

This Awesome Sub is only good for small to midsize rooms
Whant to know why? it fills the room up with more bass
must place in small room sounds great
awesome product Yamaha

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Earthquake Supernova MKII

Very easy to set up, tweak, adjust.

None that I have heard.

I bought this sub on Ebay...and what a find! This sub made my Klipsch speakers sound even better! I tested this sub using The Eagles DVD: When Hell Freezes Over, and watching Jurassic Park III and it sounded great! This Sub rocks...if you can get one...I highly recc. it.

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Paradigm sub.