I have experience with the SL3 and Request. The Sequel is the predecessor to the SL3. The Request is a much more dyanmic speaker. Vocals have more body and the low-end is much more significant. I used the SL3's and Requests in a large room, about 35'x25' and the Requests were the only ones that were able to really fill the room.cyclone said:Does any one have experience with both of these speakers if so can they explain the difference in sonic qualities between them?