I own an Ampeg SVP-BSP pre amp, and I HATE the overdrive channel, I cant get a good distortion from it, even if I combine the two channels I dont like the result. I tried to sell it and buy a SVP-PRO, but I couldnt find this unit where I live (São Paulo Brazil), and I belive that Im the only guy who owns a ampeg preamp around here, it was the only bass preamp on all the stores I have visited in my city, power amps (like SVT3, SVT2...) are easy to find. I own a T1951 equalizer and a MDX1400 compressor (both are behringer), and I use just one side of the compressor and one side of the equalizer (because I dont use the overdrive channel). As I dont use (and will never use) the overdrive channel, Im planning to split the clean channel send (effects loop) in two signals, then plug it in the equalizer, and use the equalizer has a crossover, one side of the equalizer will send 20Hz 300Hz and the other side will send 300Hz 18KHz to the compressor, and I can apply different compression rates to the Low (20-300Hz) and High (300-18KHz). I will turn off the overdrive channel and use the return of this channel (effects loop) to connect the High (300-18KHz), and the return of the clean channel to connect the Low (20-300Hz), this way I wil be able to use the volume of the clean and the overdrive channel to mix them as I wish. I had this idea readind the manual of the Trace Elliot head AH500, it says: The compression used in this range of amplifiers is Dual Band Compression, where the bass signal is split into its High Pass and Low Pass signals. Each is then compressed individually with attack and decay characteristics optimised to suit each part of the frequency spectrum. The signal is finally re-combined into a full range bass signal once again after compression has been applied. This works far better than a single full range compressor for a bass guitar signal. The reason for this is simply that any kind of FULL RANGE compression used on bass is always an unacceptable compromise. If set to suit low frequencies it cannot act fast enough to catch the attack transients, and if the compressor is set fast enough to catch these transients then it distorts the low frequencies. If you have used any kind of full range compression then you will know what we mean. Control is provided over the degree of LOW COMPRESSION and HIGH COMPRESSION individually and the eventual mix of these two is controlled by the COMPRESSION BALANCE control giving further EQ possibilities. Obs: the crossover point of Trace Elliot AH500 is 250Hz. Somebody use different compression to high and lows? is it really a good idea? Thanks.