Some very good points have been made above. And I competely agree that a lot will depend on the sub you pick to accompany the 1SCs.
I been switching off between Tablette 50 Signatures and Response 1SCs with an NHT sub for the last three years. But it wasn't until I bought a pair of Response 2.5s earlier this year that I realized how poor my sub was. Coherency and bass delineation with the 2.5s is far superior in my system than 1SCs and a sub. This could however be a completely different story if you use a sub like the REL or velodyne Digital Drives instead.
From what I understand, the D25 has better bass extension and presence than the 2.5, but I chose the 2.5 instead because of the lower price and I'd heard the they were faster sounding than the D25s. I still feel the 2.5s need a sub, but you might not feel that way with the D25s.
1SCs with a GOOD sub might fill the bill for you, plus it could also give you more adjustability and better tweaking options than the D25s. In my 12' x 16' room I think the 2.5s actually disappear better than the 1SCs or Tab 50 Sigs, and along with the better articulated bass, is what clinched it for me. Friz' point about the better upstream components paying a bigger dividend with the D25s than the 1SC is something I look forward to experiencing some day.
I think the best way to mate the 1SC with a sub is to run them full range and allow the sub to fill in the bottom octaves. Using a high pass filter ahead of the 1SC will kill the ProAc midrange and the "you are there" sound Friz mentioned. For this reason, I believe the D25s would definitely crank better than the 1SC with a sub because of their larger midrange/woofer. In a small room this may not be an issue, but it is something to consider.
I'd been spending so much time finding the right components, cables and tubes to produce the midrange I was searching for with my 1SCs that I'd neglected detailed and realistic bass. The 2.5s have provided this for me, and for this reason I plan to sell my 1SCs.
Good luck!
I been switching off between Tablette 50 Signatures and Response 1SCs with an NHT sub for the last three years. But it wasn't until I bought a pair of Response 2.5s earlier this year that I realized how poor my sub was. Coherency and bass delineation with the 2.5s is far superior in my system than 1SCs and a sub. This could however be a completely different story if you use a sub like the REL or velodyne Digital Drives instead.
From what I understand, the D25 has better bass extension and presence than the 2.5, but I chose the 2.5 instead because of the lower price and I'd heard the they were faster sounding than the D25s. I still feel the 2.5s need a sub, but you might not feel that way with the D25s.
1SCs with a GOOD sub might fill the bill for you, plus it could also give you more adjustability and better tweaking options than the D25s. In my 12' x 16' room I think the 2.5s actually disappear better than the 1SCs or Tab 50 Sigs, and along with the better articulated bass, is what clinched it for me. Friz' point about the better upstream components paying a bigger dividend with the D25s than the 1SC is something I look forward to experiencing some day.
I think the best way to mate the 1SC with a sub is to run them full range and allow the sub to fill in the bottom octaves. Using a high pass filter ahead of the 1SC will kill the ProAc midrange and the "you are there" sound Friz mentioned. For this reason, I believe the D25s would definitely crank better than the 1SC with a sub because of their larger midrange/woofer. In a small room this may not be an issue, but it is something to consider.
I'd been spending so much time finding the right components, cables and tubes to produce the midrange I was searching for with my 1SCs that I'd neglected detailed and realistic bass. The 2.5s have provided this for me, and for this reason I plan to sell my 1SCs.
Good luck!