Rythmik F12G direct servo is even better servo than Velodyne.
My video: https://youtu.be/lL7Uv0xeD20

Very cool stuff here. In the mid early 80's I  bought a Janis Subwoofer that was only 80 watts and a slotted 15" driver,.  It was in a beautiful rosewood cabinet that was nicer than my furniture. Kept it 30 years.

16:57 bass (fish)?  You were doing so good till that point.

My own subwoofers reach 11Hz in room, on test. The room is purpose built for 19Hz without eq, enabling maximum output from sybs below 20Hz.
The subs are Paradigm Sub 25, big amplifiers and Anthem PBK.

What is that giant speaker at 2:00?  And why does it have a soft dome tweeter?   Always wanted a pair of Bag end infrasubs.  Not to pressurise a room, but because they were supposed to sound very natural.   The powersoft 30" deserves a mention too.

For all of the uninitiated: I've had loudspeakers (and audio gear) to produce bass to the depths of hell. So, you people have basically missed out. Audio retailers love having you in their shops and know that you really know nothing about full range speakers! Cheers!

I don't want the standing waves nor  bass traps so it's 15" Lii Song W15  Open Baffles for me.. No overhang , no boom, only the note with lightning fast transients.

I auditioned a Bag End 18" sub about 26 years ago and was impressed.  Not sure why I didn't keep it or what replaced it.  Anyway, great video. thanks.

I wonder how the Sunfire Subrosa compares to these 7?

Subs and amps have come a long way since then.  I have two twelve inch cadence competition in a dual slot ported box running off a 500 watt class d amp. I know i'm way under powering these guys. I rattle my neighbor chandelier across the street 30 yards away. I cannot tell you how many times I have rattled shit off the walls and broken plates, bowls, etc that were on the counter. I've even rattled shit off the wall in the back end of the house A hundred and fifty feet away. The Greatest subwoofers aren't specifically a name brand it's how you design the system. There are a lot of brands out there that way overcharge , but if you know what you're doing , you can beat them.

Velodyne also makes Great Subs

Haha they used parts of my video of the contra bass subwoofer😊😊

13:04 Жастких испытаний:face-blue-smiling:

Dude, you're totally missing the point. Best subwoofer for the money...the god-given one, your southern sphincter. Just down 7 Rolling Rocks, a chick pea sandwich on dark rye, and you'll have enough fuel for a couple of hours of listening to your favorite albums. 100% my gaseous blasts are scary sometimes. Only potential side effect is the resultant stench...but if you're into heavy metal, the olfactory experience enhances the listening one. But for others, best to wear a nose plug, the kind swimmers use.

The newest stuff coming out is much better, don't be fooled by nostalgia. ;-)

История интересная, подача хорошая, озвучка - УЖАСНЫЯ. Я тока  одын слышу корявую озвучку ИИшницы..  Терппллюю но смотрю.. Лайк ставлю! на этот раз

Nothing here but regurgitated specs, no mention of actual sound quality, zero rational for placement and a most annoying machine voice with a fake British accent narrating this dung!

Казнить нельзя помиловать.  Так и тут ,  КРИВЫЕ УДАРЕНИЯ , и казнить, не это.

Love my Rel Carbon Specials.

Subwoofers are frivolous, especially if your audio system already makes substantial bass! Marketing is all the rage!!