gasolin said:
I have had a few active speakers, mostly studiomonitors
They all have som kind of hiss,white noise when you don't play music
Not all have a flat frequency response,most of them can play loud, small adam's lacked bass and a bit midrange,krk rokit powered 5 are punchy but are midbass heavy. often studiomonitors are bi amped, for preamp you can use something like a presonus,focusrite as a preamp or the bigger cambrigde dac that has a volume knob
Or for a small preamp like the Pro-Ject Pre Box S if you dont use a turntabel,very small if you like to have it next to your monitor (if used with a pc) or external harddrive it won't take up much space
Whilst a few monitors are noisy, they are easily avoided, the primary issue is driving them correctly from unbalanced outputs. The differential amps on the input are designed for balanced inputs but vary in the best method of driving them with an unbalanced source, some experience helps bet trial and error usually sorts it out.
Many of the better products designed for the home market have proper onbalanced inputs on phono (occasionally jack) sockets. Adam models do this and the A5x, A7x and my current Artist 6 are all absolutely silent. The Equator 5, another favourite of mine has a tiny amount of hiss, though inaudible at even nearfield listening distances of a netre or two.
For computer or hand held streaming based systems a preamp is not needed, a simple dac or Bluetooth/airplay reveiver is all you need. If you need more control and flexibility, Raumfeld and Yamaha offer inexpensive streamer/dac/preamp solutions at modest cost.
The Yamaha WXC50 and a pair of Adam A7x costs a little over £1k, superb value in my view.