Hi guys. So I'm hunting around Tokyo right now looking for a bigger apartment and my gear's going to arrive later this month. Basically like 7-8 amps, a 4x12, 2x12, 1x12 combo, monitors, etc. I actually don't play so loud, and I'm not trying to here, but I'd like to get things up to a usable volume, like maybe 1.5-2x daytime TV volume, so that's sort of the goal. This is highly unorthodox for the tight confines of Tokyo living so it's really made the apartment search very difficult. I've tried to restrict the search to lofts / basements where I can control soundflow downward, and concrete construction to limit the ability of neighbors to hear. So today I had a look at this place: Basement floor. Concrete. Ton of usable space for Tokyo. Questions now are: 1) Getting tons of echo down here of that bare concrete. How much of the wall do I have to foam up to cut that down? 2) I don't know so much about acoustics here but if I'm getting an echo then I'm assuming the wall is not absorbing those frequencies and they just bounce around until they dissipate. If that's the case, then the wall must be doing a pretty decent job of stopping my neighbors from hearing, right? At any rate, how thick of a concrete wall should this be to not worry about playing amps down here? And by playing amps down here I mean like with the volume in the 1-2 range. I have a two notes torpedo so I can go to impulses and out through monitors, but I just feel like it still needs to get to a certain volume to be fun (like a little bit louder than a TV). You pay a ton of fees renting here so it's a very costly mistake to find yourself trying to leave a place early.