I have a fred in the bridge position of my Gibson SG and love it...Lows and highs are really good and the mids aren't too obnoxious...The Fred is articulate and cleans up nicely...I Put a nickel cover on mine and replaced one row of allen screws with slotted Duncan screws...Rated at 10k and it reminds me pretty closely in tone to the Scremon Demon I use in another guitar..It's the only Dimarzio I've ever used actually...
I had a FRED in my koa strat for a very long time, and I loved what it did for the tightness and overall "voice" of the guitar. Really rich chords and mid-yet-warm solos. I've taken it out for now and I'm thinking of putting the FRED in my 62're-issue strat to replace a set of Joe Bardens that are in it.
i had a FRED in the bridge of my LP and man its great for rock stuff even some metal. however i felt that it sounded too bright in brdige so i switched it to the neck and it worked great there, i like it more in the neck.
as for a FRED in basswood, i havent tried it so i cant comment on it.
harmonics are great on it, very easy to get pinch harmonics out of and is nice in the lows/mids/highs. i like "punch" in the mids, it sounds more articulate with it. and it's definitely hot enough for metal. sounds even better in the ibanez satch model.
Well, for my needs I found that the harmonics came out better once I pulled back on the gain on the amp. Actually, everything about this pup sounded better once I lessened the gain. It's fairly punchy so having the gain up too high soften it too much, but the tone was still there sort of, not not as responsive to my picking.
The growl came out MORE as I was able to bite into the string more and the amount of gain was right on the amp. Kind of like "mid-dy" JB but with richer harmonics. The more you bite it, the more you get... .