Foreverhifi;
You are quite misinformed. I upgraded from an ARC LS2B MKI to a MKII and found the improvements significant in musical terms. The MKII was less mechanical sounding, more transparent and refined with enhanced musicality. Also, I suppose the "MK25" that Foreverhifi alluded to is the ARC LS25 MKI. The LS25 MKI is an excellent preamp, especially if used with NOS 6H23 tubes. Sometimes "a little knowledge can be a very dangerous thing." (I own both the LS2B MKII and the LS25 MKI preamps.)
You are quite misinformed. I upgraded from an ARC LS2B MKI to a MKII and found the improvements significant in musical terms. The MKII was less mechanical sounding, more transparent and refined with enhanced musicality. Also, I suppose the "MK25" that Foreverhifi alluded to is the ARC LS25 MKI. The LS25 MKI is an excellent preamp, especially if used with NOS 6H23 tubes. Sometimes "a little knowledge can be a very dangerous thing." (I own both the LS2B MKII and the LS25 MKI preamps.)