The last time I heard an upright bass (being played by Todd Phillips, an old friend from San Jose. He's worked with David Grisman, Tony Rice, Jerry Douglas, Joan Baez, Ricky Skaggs, Del McCoury, Stephane Grapelli, Taj Mahal, too many others to list), the 19th Century German instrument was about four feet away from my bass drum. A little further away were a pair of acoustic guitars and a mandolin. I have played many times with acoustic piano, Blues harp, fiddle, pedal steel guitar, tenor and baritone saxes, trumpet, and many vocalists.
Yes, I am well aware of the sound of acoustic instruments. "In spite" of that, I like tubes ;-). I also like the sound of my solid state pieces (SACD player, power amps, First Watt x/o, Revox and Nakamichi tape recorders, Mac tuner, Stax headphone amp, a bunch of others). Any other suggestions Raul?