The input impedance of the ART (Applied Research and Technology) SLA-2 is 22K unbalanced and 44K balanced, the latter probably corresponding to 22K per leg. Too low to be optimal, or even close to being optimal, when driven in parallel with your Modwright amp by the LS100.
Also, the fact that its rated maximum power into 4 ohms is only 40% higher than its rating into 8 ohms says nothing positive about the robustness of its design.
I’ve used some other ART products for non-audiophile purposes, and in those non-critical applications I found them to be an excellent value. But I suspect that in a high quality audiophile-oriented system they would likely be disappointing, even if no impedance or other technical issues were present.
Regards,
-- Al
Also, the fact that its rated maximum power into 4 ohms is only 40% higher than its rating into 8 ohms says nothing positive about the robustness of its design.
I’ve used some other ART products for non-audiophile purposes, and in those non-critical applications I found them to be an excellent value. But I suspect that in a high quality audiophile-oriented system they would likely be disappointing, even if no impedance or other technical issues were present.
Regards,
-- Al