Our phonolinepreamp is an active high gain SS fully
balanced/differential true dual mono input to output, inverse RIAA eq.
with measured deviation of 0.015db both channels ( includes a switchable
Neumann corner. ), class A amp, non-feedback, four layers circuit
boards, all input/output connectors soldered directly to the circuit
boards ( no single wire here. ), external dual mono power supply and a
third for the logic card, bipolar devices for the dedicated MC stages
and FET for the dedicated MM stages, matched and hand selected
active/passive parts, very wide overload margin, true low noise, a stand
alone logic card with its own power supply, etc, etc, etc.
Wow, all that when a carefully matched step up transformer will meet or exceed a very expensive active stage.
There are different ways to accomplish the goal of raising a less than milli-volt signal to the input level that a MM phono stage is happy with. Some prefer a SUT like me and some prefer active gain stages like you.
A quality SUT will do the job very well and need not cost a fortune. Companies like Denon (Engineering firm and cartridge designers) and Cinemag (Altec Peerless based designs) have been around a very long time and have a proven track record. Look carefully at the specs, what deficiency's are causing all these distortions?
I'm sure a high end active gain stage can perform well if properly engineered and manufactured with quality components. But for the price of that I can buy several SUT and cartridges. I also prefer to have a simple audio path, one passive component verses dozens of active components.
BillWojo
Wow, all that when a carefully matched step up transformer will meet or exceed a very expensive active stage.
There are different ways to accomplish the goal of raising a less than milli-volt signal to the input level that a MM phono stage is happy with. Some prefer a SUT like me and some prefer active gain stages like you.
A quality SUT will do the job very well and need not cost a fortune. Companies like Denon (Engineering firm and cartridge designers) and Cinemag (Altec Peerless based designs) have been around a very long time and have a proven track record. Look carefully at the specs, what deficiency's are causing all these distortions?
I'm sure a high end active gain stage can perform well if properly engineered and manufactured with quality components. But for the price of that I can buy several SUT and cartridges. I also prefer to have a simple audio path, one passive component verses dozens of active components.
BillWojo