A a popular amplifier builder offers the Purifi Audio 1ET400A Amplifier with two options.
https://en.wikipedia.org/wiki/Line_level#Line_in
Also, a more controversial question: will upgrading amps make a difference? I'm using a $50 SMSL 36a into a pair of old JBL l80t.
- Stock Hypex Factory Buffer - Input impedance of 47k
- Stock Purifi Buffer - Input impedance of 10k
https://en.wikipedia.org/wiki/Line_level#Line_in
The impedance of a line input is typically around 10 kΩ.
Also, a more controversial question: will upgrading amps make a difference? I'm using a $50 SMSL 36a into a pair of old JBL l80t.
- Do different amps sound subjectively better/worse (not just louder)
- Is that subjective difference objectively measurable