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Post by wiz on Nov 9, 2014 21:50:02 GMT -6
In October 2013 I finished up a two channel preamp I had been working on whilst my shoulder healed from surgery. I took the 6 months that I couldn't play and tried to learn stuff and stay positive. I planned to design a preamp, build circuit board etc. I breadboarded up my design, nothing fancy based around a INA217 preamp IC.. and tried a heap of different ICs, mucked about with capacitors all sorts of different stuff and basically passed the time and tried to learn something. In the end I went with Jim Williams plug in preamp... which was pin compatible with what I had designed around. I also, was lucky to find a circuit board on ebay , cheap, that I could mod to suit my purpose. I built the Power supply from a walwart from jay car and a ACDC kit from JLM Audio. It turned out really well, its very very quiet. It has 2 channels, phase reverse, 48V phantom and a 20 dB pad its unbalance out on TS jack so it goes straight into my patch bay.   and here is what it sounds like. I just recorded this. Its my Martin D28 mic'd with a KM84, My vocal is U87 going into my DRIP STA and the resonator is the KM84. No EQ, no verb , no nothing. Just pan . I think it sounds extremely natural. it was tracked at 96Khz/24 and bounced strait to 320K mp3 in logic. dl.dropboxusercontent.com/u/13120658/Time%20Test.mp3cheers Wiz |
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Post by jeromemason on Nov 10, 2014 0:06:55 GMT -6
Cool Wiz!
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Post by tonycamphd on Nov 10, 2014 2:06:36 GMT -6
Most excellent as wizual! 8)
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Post by Deleted on Nov 10, 2014 4:58:43 GMT -6
Hey wiz, how does it sound with your dynamic mics and higher gain? |
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Post by wiz on Nov 10, 2014 5:08:41 GMT -6
Hey wiz, how does it sound with your dynamic mics and higher gain? I will cut something tomorrow with a sm57 on guitar and vocal if you like? |
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Post by Deleted on Nov 10, 2014 5:19:10 GMT -6
Wow cool. I strongly guess your pre has lots of clean gain, so testing with dynamic mics and therefore more gain, the sonics of the pre could be judged better. I would also try the 441 or M201.
Sure - it would be interesting to see what the pre makes with the SM57!
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Post by wiz on Nov 10, 2014 5:24:43 GMT -6
I have a m201 I will use it on vocals and the 57 on acoustic is that what you are sort of wanting to hear?
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Post by Deleted on Nov 10, 2014 6:55:33 GMT -6
Oh yes! That sounds like a good combination to hear what the pre does.
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Post by jimwilliams on Nov 10, 2014 10:50:12 GMT -6
Those PIP's have a 60 db max gain using a 10 ohm gain set resistor. I also have a version 2 PIP now out. It's smaller, much lower noise and THD, it does -133 db EIN at 50 ohms. Output current is over 50 ma. IMD distortion is 1.5 PPM or .00015%. Same price, $50 each.
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Post by wiz on Nov 10, 2014 17:23:13 GMT -6
Those PIP's have a 60 db max gain using a 10 ohm gain set resistor. I also have a version 2 PIP now out. It's smaller, much lower noise and THD, it does -133 db EIN at 50 ohms. Output current is over 50 ma. IMD distortion is 1.5 PPM or .00015%. Same price, $50 each. stop lap dancing in front of me jimwilliams8) cheers Wiz |
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ericn
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Post by ericn on Nov 10, 2014 17:52:32 GMT -6
Nice Wiz !
More than once I have looked at Jim's PIPs and also thought about a couple of those modules he did for the TOFT in my Status, but I Just don't stick a mic into the thing!
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Post by wiz on Nov 10, 2014 18:15:48 GMT -6
dl.dropboxusercontent.com/u/13120658/Is%20She%20Test.mp3here it is @smallbutfine Preamp ended up flat out... 57 was about 10 Inches from both sources. I ended up using SM57 for both Martin and Vocal.. my 201 is playing up, its always on snare.. and when I sang into it a couple of notes, caused distortion...weird, it wasn't so much level as I guess frequency,...so I will have to look at it. anyways... here ya go There is a reason why I own a U87 for voice. 8) same signal path .. Preamp no comp or EQ or nada on Guitar, and preamp into STA no EQ on Vocal just panned cheers Wiz
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Post by Deleted on Nov 10, 2014 20:24:59 GMT -6
Nice!
Really nice. Really.
(Do i need another pre? No...yes? Nooo. Nooooo. Please, no.)
Thank you for another DIY-GAS.
BTW - Nice version of the song!
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Post by jimwilliams on Nov 11, 2014 10:42:16 GMT -6
If you liked the sound of the ADA4898-2 opamps in the Ross Martin DAC, you will love the version 2 PIP, it also uses the ADA4898-2 opamp.
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Post by wiz on Nov 11, 2014 17:14:10 GMT -6
If you liked the sound of the ADA4898-2 opamps in the Ross Martin DAC, you will love the version 2 PIP, it also uses the ADA4898-2 opamp. Alright jimwilliamsyou piqued my interest...I will grab one and give it a run look out for my email 8) cheers Wiz |
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Post by ElGato on Nov 11, 2014 18:44:27 GMT -6
Cool. Congrats.
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Post by Deleted on Nov 11, 2014 21:04:27 GMT -6
Lap dancing...LOL.
I had to look that one up. There is no such thing around here in germany, outside of american style tourist bars on Hamburg Sankt Pauli. Haharrr.
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Post by Deleted on Nov 11, 2014 21:10:24 GMT -6
wiz, btw. the second clip is a good example for the fact, that it's mostly the source, not the mic. I like your voice, even thru an SM57, doesn't sound bad at all.
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