These started out as an experiment here at the shop, Hence the original garxxxx moniker. These turned into My version of an OA10, an old early 70s German DOA.
The original OA10 was a 9 pin rectangular box with 2 Different versions of output transistors and were externally Freq. Comped. This DOA was designed to be operated up to +/- 22v. My German OA10 expert buddy told me that the Originals were not very particular as to what transistors and Diodes they used.
My version is a standard 2520 pin out with internal freq. comp. Built in. It uses all modern parts and will run fine at +/- 15v thru The 51x standard of +/-24v. (All of my protos were burned in for 3 weeks at +/-28v and still ran cool) PSU decoupling is also on board like all my gar DOAs. These Will drive 2503 style of transformers with ease.
To my ears, the garxxxx is not as open/flat/clean as the gar918 top to bottom but is still very nice and smooth in a very good way. I love the warmth and presence of the lower mids without them being at all muddy. Much warmer than all my other gar DOAs.
My Guitar beta tester loves the garxxxx in an API style pre for guitars. My other beta tester loves this guy for vocals, bass and a general all around for mic pre duties.
To Jeff’s ears… “Yes the low end warmth is what got us about it too. So thick and hefty without being pillowy or flabby. I think it will rule for kick and bass. We also like the smooth top end.”
I will be interested to hear what others think about other Uses summing, EQs, Line amps etc. Feel free to post Your thoughts in the garxxxx(OA10) support thread At GroupDIY.
These will soon be available at the CAPI store in both kits and un-stuffed pcbs.
they are good in an API preamp but they are GREAT in the five fish.
glad these are for sale now
I will avoid detailing the sound in too many verbs for the sake of sanity but I hear this one as being kind of tight and more transparent than some of the other DOAs. The sound to me is "Lean and mean."
It has quickly become a favorite around here.
Last Edit: Oct 7, 2019 13:40:44 GMT -6 by monkeyxx
I just got an email from a guy who's main business is commercial VO work.
"I just wanted to report back to you on the OA-10's in the Lola. I'm really digging it a lot for VO. I like the wee bit more bite and how it's still very smooth and detailed. It's perfect now for narrative work. I'm definitely going to keep them in there."
Yeah I hear that bite also, and the detail, that's a good description! The word smooth is a bit meaningless to me however. It means something but it could mean any number of things. I guess people usually mean an even frequency response. Which ideally any good gear would have.