The blog collects some tube models and give them a brief, also you can do a simple replacement, but for details, you need search them and get detailed parameters and curve.
Why some audiophiles like to choose electronic crossover, you may look at the following reasons. Of course, to use electronic crossover will consumes more power amplifiers, and one channel needs one amplifier.
Nobody but you! The warm man's song is from IWISTAO HIFI 4 Inch Full Range Labyrinth Speaker plus single-ended class A 2x7W parallel 6P14 vacuum tube power amplifier. The music source of notebook is connected with a CSR64251 Bluetooth decoder via Bluetooth wireless connection, and music player is foobar2000.