Ok, so I've been wondering what I've been missing.
I got a 'warm audio tone beast'. Its supposed to be a lot like a 312 and I didn't want to shell out for a 3124+ (£2800, seriously?) or buy the PSU and case for one 512.
I have a fireface UFX. Apparently it has competent, clean pres, according to the luminaries of the internet. I've only ever used interface pres. I've never had a problem with them. I've always felt that so much can be done to change sound that isn't subtle and costs much less that it's never interested me.
But, I got curious and bought this thing. I've tested it as a guitar pre and bass DI. The following tracks are a few bars of drop A guitar with some superior 2 avatar kit on it. I made no effort to really 'mix' anything, and I didn't change the amp (driftwood purple nightmare) from how I would play it, and I put the 57 in a best-guess position and didn't move it. There's too much gain and low end, and the kick is getting lost. I don't really care about that for this test.
The guitars have a high pass at about 90Hz. The bass and 2buss are a bit compressed and there's about a db, occasionally 2, getting stomped on by a russian elephant.
I was tempted to do it blind, but I like the silly names I gave the tracks, so I'm not
All in all I like the difference, and I'm keeping it (where I bought it from has a no-quibble return policy), but the difference/price ratio is terrible and next time I see someone bemoaning interface pres or advising a neophyte to buy a 1073, I'm going upside their head.
But, there are the files, you listen for yourselves
Names are pre (guitar) - di (bass). The other DI is a little labs red eye.
The other two combinations.