c7sus said:
I'm not trying to stir shit. But it's prolly what I do best........
Since we have two gentleman here that are familiar with this gear, I'm curious about API vs. OSA.
From what I have been told, there really is no comparison, and that the API stuff is where it's at. But that info came from a third-party that builds and sells gear, too. So I take it with a grain of salt and figure the guys that know can tell us how it is.
You should take it with a grain of salt, but that goes for anything including what I tell you. Use your common sense (a.k.a. bullshit meter),
and your ears and you'll be ok.
First though, a bit of history about Old School Audio, and why your
to remain nameless gear manufacturer may have some unjustified dissention towards OSA. When Old School Audio and it's founder/head tech Dale Epperson started making preamps about 4 years ago or so, the preamps
were essentially API's. They used actual 2520 Op Amps, and I believe different transformers than API, although the tranny's were very "API-ish". Not that the API transformers were always "brand" specific because if you do some research you'll see that API has used
at least 3 transformers since it's inception starting from the days of Saul Walker. All sounded different according to people who have heard all three. The OSA's had the same circuit topology overall (a hand drawn printed circuit board works just as well as one made by a machine...look at Manley boards sometime), same PSU amperage specs I believe (currently 1.5 amps, to be upgraded very soon to 3 amps). So to say they weren't as good as an API even 4 years ago when the company was really doing nothing original other than what was really an OEM API, is a bit silly IMO, because that is exactly what they were at the time....API's. Anybody with a somewhat advanced amount of technical knowledge can look at an API schematic, get the parts together and build one. It may sound simple, but it's not. You really have to know what you are doing as a tech and designer to get everything to work together properly. It's not as complicated as many modern designs, but it works. If it ain't broke...
So let's fast forward to 2002. Dale Epperson brought on Toby Steele as head of sales. Dale's a tech, let's just say tech's are very much 'artists' in their own right, and many of them don't know a damn about marketing or sales. This is excellent for making top notch gear, bad for letting anybody other than a few friends to know about it. At that point Old School Audio really wanted to make a conscious move to separate themselves from being an API copy, to something original but at what they felt is a more competitive price point. First, they stopped using API 2520's. This was the most obvious and essential move towards the goal of creating their own identity. Dale started building his own Op Amps, we'll call it the "DE-99" based loosely on somewhere between an original 2520 and a Jensen/Hardy 990. Dale had even tried the Millennia Media 990 (FET) before he started building his own but found it too clinical for what he was going for in terms of sonic character. Dale's operational amplifier, like the Jensen/Hardy, I believe is a bipolar transistor based design rather than a FET based design. Don't ask me to explain this to you, but what I am sure of is that it's different than a FET design which is what is in the Millennia and the Forsell designs. This neither makes any of these products 'better' or 'worse', but merely different. From what I understand though, the Hardy 990 (which I guess is actually the 990 B & C [?] being the newest version, with the Dean Jensen being the 990A) is a medium point between ultra clean (M-99, Forsell F990) and very colored (original 2520).
Secondly, to differentiate themselves from API, two other mic input transformers were decided on, with completely different sonic results than the "API-ish" version. This created three distinct preamps in the Old School Audio line. First, there is the "A", which uses an Altran input transformer, the "C" which uses
a Crimson input transformer (and is the one that IMO sounds like a Brent Averill 312. I haven't heard the current API 312 so I can't comment), and the "L", which uses a 1538 Lundahl input transformer. To sum it up the "A" is clean with a bright top, the "C" is mellow with a nice midrange coloration, and the "L" is bigger than life and has a nice balance between coloration and clean.
Thirdly, and this is the most recent addition from just a few months ago, the preamps now have separate control over the input and output rather than just the
one knob that is found on an API. Anybody who owns a Neve 1073 or Great River NV knows the flexibility this feature can provide.
So essentially, they've differentiated themselves from API to the point where 85% of the product cannot fairly be compared from a marketing standpoint to an API of any era, vintage or modern. Visually, yes, but with the exception of the "C" model, OSA has made it a point to make their product more flexible both sonically and in function from it's beginnings. Keeping in mind the way the product started in 1999 as I explained in the first paragraph, I'll leave it up to you to interpret this in the way you see fit.
Lastly I know specifications don't mean anything really if something might not sound good, but these mic preamps are extremely high headroom, low noise, and have quite a bit of available gain (65db). I think Dale is quite the honest & humble guy, here is what he states as specifications for the product:
Gain Range: 25 - 65 dB
Headroom: +32 dB
Noise Floor: -128.6 dBm (close to theoretical limit)
So to say the OSA line doesn't compare to an API when presenting the clear cut evidence just doesn't make sense to me. It seems really biased. OSA and API are both are great products that can be complimentary to each other. I apologize in advance to those true technicians out there for any technical blurbs or contradictions I have made, please don't shoot the messenger.
------------------------------
Nathan Eldred
atlasproaudio.com