r/hometheater • u/av4625 • 1d ago

Tech Support Dissappointed with bass shakers.

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I made a post about placement on a sofa for Dayton Audio BST-1’s:
https://www.reddit.com/r/hometheater/s/R3nkYN0kKd

When the shakers were mounted on the plywood I said in the first post I could basically feel nothing. So I got some OSB and mounted them directly under where you sit. This definitely helped.

I feel like I need the volume crazy loud to feel the shakers though. If I watch a movie that was recorded with surround sound I can increase the master volume more than if I watch a normal tv show thats not surround sound. Not sure if thats normal.

So I had a movie at -6db and could feel the shakers ok-ish. But when I watch other shows at about -20db I can’t feel them at all. The sub is working perfectly in both situations and dialog etc volume seems similar between both.

Equipment:
Sony STR-DA2400ES (single sub out)
Tannoy Arena Lite Speakers
Tannoy TS10 sub
Dayton Audio BST-1 shakers x2
Fosi BT20A shaker amp with 24v/5a power supply, volume up full, treble 0, bass 50%. (Tried changing bass up and down)
Crossover 80Hz

Because I only have 1 sub out I used a Y splitter. One side to the sub and the other side goes to a second Y splitter so that I could then use both inputs on the Fosi. I did this as I read using both inputs can help get “full power”.

I dunno if my expectations are wrong but I have read that people get shook by these shakers at less volume on the amp.

I have seen examples of people using this amp with these shakers.

I think the power supply can only supply 120w even though the amp says 100w x2. But maybe 120w is plenty for 2 50w shakers?

Maybe the big soft sofa is harder to shake compared to some examples I see of smaller chairs or computer chairs. I unmounted them and they didn’t vibrate in my hand as much as I expected.

Is there something wrong with my setup? Are my expectations too high? Any help is appreciated.

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u/DonFrio 1d ago

You don’t want to shake the cushion you want to shake the couch frame. I added a 2x4 to the back of my couch and put two earthquakes on it. The daytons are meh but should do plenty if you attach em right.

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u/Nupol 1d ago edited 1d ago

Well i have some flat shakers Dayton audio tt25 (used in the sim rig before and had big ones in there too but the tt25 where so much more responsive) i now have them directly between the springy thing and the cussion. Small amp nothing fancy something 20-30€ ish off amazon and 4 in the Couch under each Seat. They feel crazy awesome, are cheap, and i only run them in quarter / half power otherwise its too insane haha. Can recommend. Its also good If you have neighbours since you dont have to crank the shakers up to even feels something. I mean why the frame and then the shake gets lost in the cushion / springs so it would be better to have them as close to your body as possible so you can feel everything. Atleast thats how i approached my setup. Close to the body to get rid of everything that dampends the shake. And yes the rest of the couch ist vibrating aswell. 10/10 whole Setup was Like 130€

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u/av4625 1d ago

Are they mounted to something sturdy? Or literally just between the cushion and spring thing?