Surely you must have heard of McIntosh, who has had tone controls on their preamps for years! Some have the basic bass and treble controls, others have the 5-band equalizer. Check them out.
Tone controls? Sorry about the heresy.
I need tone controls! Too much of the music I listen to needs it. A lot of 70's, 80's, 90's, 00's rock. Some acoustic music. Who makes excellent preamps with tone controls OR what other box can I use that won't degrade the sound too much? Currently use a PS Audio 4.5, Adcom GFA-555II, JPW speakers.