Anyone know if vintage (i.e. OLD) Advent floorstanding speakers (they look like they're from the 70's, tweeter and 8 or 10" woofer, no midrange, wood on top and bottom) are 4, 6, or 8 ohm? My sister was given a pair, and they actually sound pretty good-- she's using a Denon 85wpc receiver-- but I'm wondering if these speakers need more juice. They cut off sound completely when turning the volume down to low levels for background music-- so it's either on too loud to have a conversation, or not on at all.
Maybe someone knows if it's an amplification issue?
Thanks!