Feature:
Has everything a decent mic pre should have: 48v Phantom power, low cut (with selectable frequency), phase invert, even a limiter.
The Digital output is nice. I wish it did other frequencies besides 48kHz and 96kHz, as I don't prefer to work in either one of those - 44.1 or 88.2 is my preference.
The metering looks cool, but is not very useful. It doesn't seem to reflect what I'm seeing/hearing out of the board.
Quality:
It's built very nice for the price, no doubt about that. It's good looking gear. I'm not too upset about having wall-wart power supplies. The connectors are decent quality, and the pots/knobs feel solid. In use is where the cheapness becomes apparent.
Value:
Solidly built, good looking, and the sound isn't bad - it just isn't good, and definitely not "pro" - but for the price who could really argue?
Desirability:
Well, it looked like it would be more useful than it actually has turned out to be. I'd say a lot of these have been sold on price alone, since it's rock-bottom.
Sound:
I've been testing a pair of C Valves here in my studio, since for whatever reason my church bought four of them, and hardly used them before putting them on the shelf. I got curious about why, but I think it's becoming clear...this is not even passable as pro gear, even though the 24/96 SPDIF out is a nice touch. The tube saturation is not bad sounding, but no matter how I set them I get this contrived "dry signal + tube grit", instead of a nice subtly colored sound.
I've also had ground hum issues no matter what I do (ground lift, different circuits, etc). That's not acceptable in my studio!
The limiter is a nice feature, and is fine if you want a hard-edged bulldozer of a limiter, but don't expect it to be subtle; It's not.
Ease of Use:
Simple and straightforward - seemingly. However, I've had difficulty finding settings that didn't give an air of "hey! I'm a cheap tube preamp!" The gain staging is a little tricky if your goal is to use the limiter, but not have it slammed the whole time.
Support:
From what I hear, Samson support is pretty good. I haven't personally used them however. I couldn't imagine calling them up and saying "hey, this C-Valve sounds like a cheap generic piece of gear" and them saying anything besides, "well, you should have known that."
Overall:
It is what it is. If not for the ground issues (which maybe there's a remedy that I haven't tried yet), these would be great for any situation where you just needed mic preamps with phantom power - like a live 2-track recording or something. Don't expect super quality sound for this price - that's just asking too much. You get what you pay for, it's been proven time and time again.
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