good preamp

[super tone hi f]

hi
I run a sound system in uk and i am looking for a good preamp to build to drive my 10 k rig. i have tried various shop equipment none of the seem to do the job no deep bass or clear mid range and sharp trebles. would like a circuit with seperate bass, mids and treble. can anyone help.
also many years ago (1984) before i got into electronics i was giving a home made 10 band graphic i opened it up to have a look insde it to find it had coil wound components same as a crossover but smaller to contol the freqencies. The unit was awsome i have not heard nothing like it since. also looking for a good graphics circuit
i have no formal quilifictions in electronics. but have learnt how to red circuit diagrms. i have built hundreds of projects some work many do not. latest being a 400 watt amplifier from aussie amplifiers this is before he went commercial and posted the curcuit diagram on the net. any information will be grate full