oblgny, The spikes for the 3.5's are intended to couple the speakers to the floor where appropriate(!). These early Thiels were provided with two sets of spikes, one set was blunt tipped for direct contact with hard, firm flooring and the other set was pointed in order to pierce through carpeting to make contact with firm flooring. The spikes when inserted into the speaker bases hardly protruded, and not intended to be used just to elevate the speakers. In fact, Thiel suggested not using them when the speakers would be placed on flooring that might vibrate with such coupling. Thiel used to offer the replacement spikes for a very nominal fee.