This was an upgrade from my stock pres on my projectmix. The sound quality is definitely better but not by leaps and bounds. The compressor is absolutely useless. I bought this as my main vocal preamp and find it very dull sounding. The EQ is the strong point in this unit. The EQ is very musical and sounds really clean without being harsh. I would not buy this for anything other than an EQ. I gave it a 4 beacuse I really like the sound of the EQ section that much!