This subwoofer is a really good one. When Buying a Subwoofer i reviewed the Polk PSW150 and the PSW180 (Really bad since it uses a compression driver) and JBL and NHT Subwoofers. I Liked the Sunfire one the best but when i took it home i found alot of problems with it (not sound wise). the Subwoofer was Really small and didn't weigh as much as the Polk and NHT Subwoofers. I Thought how great this is. I Turned on I Know What You Did Last Summer on my Sony SDP-S700. The Bass was great but when i got to the 12 o'clock the subwoofer started jumping around hitting the floor. this was all cause of it's light weight. The Subwoofer also had a really hard time when producing sound really loud. I say they put the internal amp out of the Cabinet. The Subwoofer is one of the best for the price. If you like playing your music past about the 12 o'clock mark than i suggest that you buy both a Subwoofer Flooring Stand (about 2 inches) and Spiked feet for the Flooring Stand. Or buy over-sized Rubber feet. First time i saw this subwoofer i thought "what the hell kind of subwoofer is that?that's not a subwoofer it's a box marked Subwoofer. But the Salesman said "Don't Judge by size but judge by sound" so i did, and Eesh the bass was booming and the woofers didn't have any Magnet Back Slapping. This is one of the best subwoofers you can get in it's price range but i would think about the Under side of the subwoofer.
Right now i have a Polk Audio CS350LS Center Speaker, 2 Polk RT800 Front Speakers, 4 Polk RT F/X Dipolar (set on Bipolar), and Polk PSW150. All of this is accompanied by a Yamaha RX-2092.

Judging from sound i would give this subwoofer a 2-star. but judging from Size, Price, and Sound I Give this subwoofer the rating i gave.

I've got the True Subwoofer MkII. Firstly, I must mention that this subwoofer is the single most effective/pleasing addition to my stereo that I've ever purchased besides general Source/Control/Playback stuff.
This subwoofer fills in the, now realized, essential lower octaves of music. This addition is not subtle and it will vastly increase your listening pleasure! I find myself listening at lower levels with more pleasure and soothing effect because any music I play is now more fully realized or revealed. Music takes on an increased therapeutic quality. I'm sure that any very good subwoofer can create this effect. My point is that this subwoofer is very good and considering its size and price, it's excellent. It takes a little time to adjust it so it sounds correct with your stereo and mine did exhibit a ground loop hum initially, but the manual recommended turning the plug around, which did solve the problem. (Must use an adapter with the polarity plug filed down to the smaller size)

My respect for this product was solid and my satisfaction supreme until last month a fuse blew and subsequently upon fuse replacement the amp board fried! (diagnosis from Sunfire). I called them and their response was excellent. They even UPSed me a new box for shipping to them. My only disappointment was that I had to pay for shipping, $20, but they did make it as painless as possible and I couldn't have asked for more. My unit was returned within a week. No reason was given for the cause of the fried amp bault fault.

Well during the week it was out it was missed dearly. My Meridian system sounded cheaper without it. I'm glad to have it back. If this unit was ever stolen or destoyed I would replace it with the same product from Sunfire. I used to think of subwoofers as opitional accessories. This product turns them into a necessity, as primary as an excellent set of speakers.

This is an excellent product. It has given me much pleasure and only one pain during the 6 months I've been using it. I like it a great deal. And the company will treat you squarely.

Note: My True Subwoofer rests on carpet behind my stereo and I have never witnessed it bouncing around. Also, I have the volume on this unit adjusted to about the seven o'clock position. It integrates very well with my stereo, but I must also note that you can make this unit sound overbearing and uncomplementary to any stereo with improper or random adjustment of the controls. I would buy it again!

I have finally set up my Paradigm home theater system properly in my entertainment room of my house. I was never quite satisfied with my PS1000 subwoofer that came in my system. It just lacked in pitch and definition so I couldnt stand to listen to it with music so it is usually turned off. My mini-monitors dont play bass below 75Hz. I replaced them with a pair of Monitor 70ps, which are basically mini-monitors with an addition of 2 six inch mid bass/ subwoofers powered by thier own 140 watt amp per cabnet. My friend brought over his new Sunfire MKII to show it off. I laughed when I saw it. Friends, let me tell you something. This sub hooked up to my system was nothing short of the most incredible audio experience I ever had. There was no end to the depth of this subwoofer. The sound pressure was so intense it was terrifying because everything in the house was shaking and rattling. There is no distortion that I could hear. The only noise that I found annoying was my house shaking of its foundation. My neighbor actually came over that evening while I was playing a movie to see what I was going on. The monitor 70p's are an excellent match because they deliver upper bass slam that just about knocks you down. The sunfire sub teamed together with the Monitor 70p will leave you practically gasping for air. I was sold and I bought one that weekend. I give this sub a rating of 10 stars but 5 is the maximum.

I bought the Sunfire MK II after listening to other Subs that are way moreexpencive$$. The funny thing is that the Sunfire CANNOT be beaten by any
Sub costing below 2000$. Only Subs that look like Dining tables will
deliver cleaner bass.Im very sure that Velodyn is in a little trouble
because of this Sub because it sounds better than there f-1500 (15 inch woofer)
and costs less. Also every store in NY which has to offer both the Sunfire
and the Velodyn including other great subs ALL say " buy the Sunfire". I
would suggest that if your going to buy this Sub for sterio use (music) then
you should have Full Range Speakers and do not use the subs crossover but let
the full freqency go into your main speakers because the Sub is very good
for the DEEP BASS and is not strong on the high Bass. This Sub will sound
louder and DEEPER than other big expencive subs costing twice as much but
lacks the upper high bass. My front speakers (Tannoy c-10) are full range
speakers and they recieve the signal directly from the preamp. not from
the Sub, allowing them allso to play the bass and they make up for the
higher bass that lacks from the Sunfire. With this combination my music
sounds better than any CLUB on earth ( I hope).I listened to the new
velodyn HGS-10 and I must say they SUCK, The Sunfire will roll right
over them on any system any time, sounding louder,DEEPER !!!, and just
as clean. I would give this awesome Sub a 5 for Home theater and 4.5 for music
listening ( thats when using its crossover which eliminates the upper high bass)
Great SUB !!

I've listened to this on two separate occaisons in two different shops with different main speakers and ancillary equipment. This is a speaker that is small and moves a lot of air. For the home theater enthusiast, most of whom seem to want lots of bass quantity, that's a good thing. The sunfire moves as much air as much bigger speakers, so it solves room placement problems created by large boxes. But I've never heard home theatre bass that sounds much like the real thing (I admit I have not heard the multi-kilobuck systems rated class A by Stereophile). The problem is that the bass speaker has far too much overhang. For example, I heard an expensive velodyne system demoed in a shop with a film that included a helicopter sequence. The walls of the store were shaking. Very-impressive. But it's not what a helicopter sounds like. I know, because I've flown in them. Consider what thunder sounds like in real life. Every subwoofer I've heard dilutes that impact.So, for a music lover with bass-shy main speakers (like stand-mounted monitors) who wants that last octave of bass, a subwoofer can be a mixed blessing. This speaker, in particular, seems to give you too much below 35 Hz and not enough in the 40 - 60 Hz range where most monitor speakers are rolling off. The result is "thuddy" bass, as in "thud-thud" bass (as distinct from "boomy" bass resulting from an 80 Hz bump in response that goes "boom-boom"). For the music listener, a better choice is to find a well-damped subwoofer that is flat to 30 Hz or so and doesn't really try to reproduce anything below 28 Hz. There's no music down there anyway. The ACI Titan is one such speaker, the Mirage BPS-150 is another that's not quite as good. These also happen to be cheaper than the Sunfire. There are better ways to spend $1300 to improve the sound of your main speakers if you're just interested in music. If you want loud home theater bass effects, this seems to be as good -- and inaccurate -- as anything else in the price range. TWO speakers for music; FOUR speakers for home theatre.

Un real. This sub works perfectly with my Boston VR40's. Prodigous bass. I set the Volume at 12:00, the crossover at 70hz, the phase at 0deg, eliminated the ground plug, stuck it behind a chair in a corner, and I've never heard anything like it. I feed my VR40's 240wrms through 2 Rotel 980s, and I was concerned that at the high volumes I sometimes listen to music, that most subwoofers would barely be audible. My Yamaha YST-60 disappeared at high levels. The Sunfire, once positioned and set up properly, has the capability to overpower my system. Positioning this sub properly is very important. When I first powered it, I had it sitting in the middle of the floor. It produced alot of low bass, but had little punch or accuracy, when reproducing tight bass drum hits. After trying numerous locations, the sub wound up in a corner behind a large chair, with the driven driver facing a wall about 10" from the wall. The connection side is facing the other wall about 8" from the wall. The (blank) side is about 4" from the back of the chair. Once in this location, the tight bass hits are hard and accurate.

The crossover setting is 70hz, which seems to roll nicely into the 2 7" bass drivers in the VR40's. I've heard that the Sunfire does not do well above 40hz, so perhaps I could get away with a lower setting. The VR40's have ample mid bass, so I may be ok with a 40hz x-over setting.

If you experience a ground loop hum, try going to an adapter without a ground plug. If you want to rattle your house off its foundation, play Bela Fleck's Flight of the Cosmic Hippo, at top volume!!

Enjoy, 5 stars

seeing is not believing here.......hearing is believing. bob carver has done it again. this thing is simply amazing for its size. ive seen it for mainly between$1200-$1300. it blows away many subs 3x its size. there are better and louder subs out there, but not this compact and concealable. really cool.

I purchased the Sunfire True MKII 4 days ago after reading many many reviews and auditioning this sub in 3 different showrooms. I am a novice to HT and I quickly realized that my modest Take 5 mini-sat set with a Mirage PS10 (100w)just didnt satisfy. I was concerned about this purchase because for my modest budget, it represented the most money I have spent for any single product.
I didnt get the feeling that for $1100 I was getting the best sub for my money.
Well, I must say my concerns were gone when I queued up the T2 DVD soundtrack
and felt the bass in my face! The entire room ('11x16') felt like it was pressurized with bass. I havent experienced anything like this before. Even the demos I had of this sub didnt equal the experience I had at home. My wife thought I was crazy to trade in a bigger sub (the Mirage is larger in size, definately NOT sound) for a smaller one. For someone who has at best a passing intrest in HT she was impressed from the sound from this product.
My DENON AVR-3200,Panasonic DVD-A310,SONY-DSS are mated to the Take 5 set and Sunfire via Monster cables all around. I love this sub. However.... the dreaded "ground loop hum" is present and I would like to fix that. I would recommend this product to anyone. For music I was feeling and hearing bass details I never heard before. Please give this product a listen, you wont be sorry.

Great sub for the money.Amazing sub for the size.

It'll be my next purchase. I've compared it to offerings from Velodyne, Paradigm, Definitive, and M&K. For the size, the HGS-10's competitive, but it reached it's limits much sooner.. which lead to very audible distortion.

As for comments how "yeah, it made the room shake, but a real helicopter doesn't sound like that!", you should instead look at those who mix the soundtracks! The subs are reproducing what they're fed. I can't wait for Saving Private Ryan! That's what this sub is made for! (I should have 2 of them by the time it's released on DTS-DVD)

Many of the people here are comparing this subwoofer with ones costing twice as much! Who cares?! You cannot compare a Honda to a Mercedes, however a Honda is an excellent car, and half the price.
Placement is crucial with this sub. It can sound overwhelming and muddy in a small room. When placed properly, however, it delivers...with slam! I know of a big restaurant/bar that uses a single Sunfire sub to fill the whole place with low freq.

For the price, this sub is untouched. (Note that many of the critics here do not own a Sunfire, and feel better hammering it with bad reviews. Also, be sure to listen to it at home, and not in a display room.)