Spotify Premium streaming, DAC3 NOS TDA1543. Philips Black Tulip 270 pre / Black Cat mono power amps. Speakers: MBL 116F. Atratus3 i/c & Western Electric 16GA spkr cables. ProJect and Nordost Magus power cables
Headphones: AKG 551, JBL Synchros S700, B&O H6, PSB M4U-1,Beyerdynamic DT-150, B&O Form 2 & 2a and Sony XBA-H1 & SoundMagic E10 IEM headphones
2nd system: Pioneer DVD transport, Rotel RP-3000 tt / ADC XLM, Audiolab MDAC, Philips 370 power amp, Klegg Symphony 102 speakers
Back on track then,
For the OP,
I will share my own ideas of what I deemed as the nearest I could come up with as the perfect preamp for me at the time, which by the way’ I still use in my own system today.
The preamp was designed to compliment the power amps I was building at the time.
These are the attributes I decided were most important, and achievable.
Near Perfect stereo matching between channels at all levels of attenuation, and frequencies.
High build quality.
Directly coupled circuitry throughout
Input impedance fixed ie; not affected by attenuator.
Low Output impedance, again that wasn’t affected by attenuation at any position,. circuitry that was capable of driving all types of cables and lengths [realistically]
Without serious drive, and bandwidth limitations.
"Today scientists have substituted mathematics for experiments, and they wander off through equation after equation, and eventually build a structure which has no relation to reality"
Location: Bolton, England