I bought 4 inch risers for my couch to fit underneath, unfortunately this made the couch weirdly tall - so I wouldn't recommend putting it under the couch, it unless their geometry doesn't narrow it down easily. Instead I put it under a console table next to the sofa and it worked really well. The device will shake the floor (and furniture) if you wish. If you don't do this, you can reduce the bass on the device. your recipient. The first method is great fun, but can cause loose objects to bounce and ruin the sound quality, so consider this for the room you have in mind. I'm not an audiophile so can't confirm the spectral purity of the output, but to the untrained ear it sounds great.
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