Are you sure they are 16 Ohms? I would expect them to be 8 like the BC1 and BC2... In fact I would be amazed if they were 16!
SP1's are one of my all time favourite speakers and not that far behind the KEF 105.3's I use... although the KEF's will eat the Spendors on max loudness, big scale dynamics etc. The 105/3's were the replacement for the 105/4's btw... yeah I know
Both were very good speakers which I would not expect the Spendors to beat and were several times the price of the Spendors.
Arkless Electronics-Engineered to be better. Tel. 01670 530674 (after 1pm)
Modded Thorens TD150, Audio Technica AT-1005 MkII, Technics EPC-300MC, Arkless Hybrid MC phono stage, Arkless passive pre, Arkless 50WPC Class A SS power amp, (or) Arkless modded Leak Stereo 20, Modded Kef Reference 105/3's
ReVox PR99, Studer B62, Ferrograph Series 7, Tandberg TCD440, Hitachi FT-5500MkI, also FT-5500MkII
Digital: Yamaha CDR-HD1500 (Digital Swiss army knife-CD recorder, player, hard drive, DAC and ADC in one), PC files via 24/96 sound card and SPDIF, modded Philips CD850, modded Philips CD104, modded DPA Little Bit DAC. Sennheiser HD580 cans with Arkless Headphone amp.
Cables- free interconnects that come with CD players, mains leads from B&Q, dead kettles etc, extension leads from Tesco