1. (preferred) - speakers mounted on hydraulically operated platforms (or a bunch of garage-sale Roombas rendered surplus after owners tire of posting cat/Roomba videos on YouTube) so each speaker under test moves into the preferred position when activated
2. (practical) - participants move speakers manually (only after participating in this round of blind test) and are rewarded with beer
3. (equally practical) - each speaker pair is slightly offset horizontally to the previous pair, such that ideal listening position moves slightly between speaker pairs. Listening position is a roller chair
4. (what I'm doing today) - each pair of speakers is inside/outside previous pair so listening position does not move, but separation between speakers changes