Hi all - built the Groovewatt almost 2 years ago (see my posts on forum page 55). Still sounding great btw.
Figured I'd share...
Being a nerd I like to test/adjust my audio systems. Thru much trial and error I've found ease and great results in using pink noise and TrueRTA software. I use pink noise as input, adjust EQ to obtain flat frequency response, then further adjust EQ accordingly to my personal liking.
Since phono preamp corrects for RIAA curve and I'm definitely amateur I've never tested my build for frequency response like Bruce has previously mentioned...well, came across an old CBS labs pink noise vinyl (STR 140). Still much testing to do on overall system but just from turntable output to Groovewatt output looks pretty good.
In pic, both channels shown. Lower curves are turntable output and upper curves are Groovewatt output. Some rolloff at higher frequencies but no peaks/dips. Future plan is to put a graphic EQ between Groovewatt and my antique cabinet to further adjust to my liking. To be clear, no complaints from the Groovewatt, just like to have adjustability in setups and the antique cabinet only has treble/bass adjustment and I'm itching for more...maybe one day I'll build a full tube system but I dig the old stuff...and hey, still sounds good to me.
Todd
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