mantaman. You might not like what I am about to tell you, but I feel my information will be critical to you. First, on a positive note, your Solo speakers are / were an excellent design for their size, and a wonderful 1st product line from Phil Jones, the primary designer behind the Platinum line. Now, the not so positive news. To achieve the excellent low frequency response from such a small cabinet and small woofers ( a pair of 4 inch, per cabinet, if I recall ), the speakers are very inefficient, which you are experiencing with your single 7100 ( I am familiar with it ). In fact, the Solos are some of the most inefficient, high quality speakers, I have come across ( and that, is many ), in my journeys ( I sold, and installed, the Platinum line, back in the day ). Besides them requiring a lot of power from an amplifier, the Solos also dip in impedance, at frequencies where much music is contained, to around the 3 - 4 ohm area. Because of this, I am not recommending a pair of Mac 7100s, bridged, as I am recommending another power amplifier altogether. Something with 200 wpc, and high current delivery into lower impedance loads. As your gear is pretty old, I am thinking a budget might be important to you, however, there are a number of amplifiers, new, and used, that are reasonably priced today, that will get the job done ( I used Krell and Levinson ). Other popular product lines, such as McCormack, Parasound, Classe, or even a higher powered Mcintosh, would fit the bill ( there are quite a number of others ). I am not expecting you to understand this, and, I am sorry for not answering your question, although, your question has been answered by another, above. However, others may have different experiences, and opinions, than mine. YMMV. Enjoy your journey. MrD.