@lewm I’m just curious how that works - doesn’t a "transimpedance" stage’s effective gain rise as the source’s (cartridge coils) DC resistance lowers? So for an MSL with super low < 1 ohm coils and high 0.3 - 0.5mV output (usually typical of 5 - 15 ohm coils), does that not risk overload somewhere? If not that sort of sounds like a magic gain generator 😅
Besides the "magic" core material MSL markets, isn’t the secret of their low impedance simply using a larger gauge coil wire (meaning more mass for same # of turns)?
I’ve been playing with a fairly new Frog Gold and MSL Eminent Ex in my office rig. Strangely, the Frog loves my EAR MC-4 SUT and hates the JFET MC stage (active voltage amplification) of Herron VTPH-2A or Hagerman Trumpet Reference. The MSL is exactly the opposite, preferring JFET MC. Despite the Frog listing 0.85mV output and MSL 0.4mV, they have the same perceived output levels. When either cartridge doesn’t get its "preferred" MC stage, its soundstage shrinks; furthermore the MSL becomes dull and boring while the Frog gets a piercing harsh treble. On their preferred MC, both are wonderful.