« on: June 04, 2024, 01:32:35 PM »
I recently sent in my two Lunatec V3 units to have the ADC's upgraded. The cost was $100 per unit. I sent in the two V2's I own earlier and after they were tuned up I asked if there were any upgrades that Grace does for the V3's that are similar to what Oade Bros was doing. I think they call it a "concert mod". I might be wrong about this but their website says $175 for the upgrade. Anyways I asked Alex Vallejo with Grace to send me specifics on what's being done so that I could share it with all of you fine people.
Hey Brian,
I replaced the AD712s used in the trim/HPF buffer and ADC input buffer with OPA1652 as per Mike's recommendation. I just compared stock unit to modified and distortion + noise is negligible, ~1dB improvement. ADC Dynamic range is 2-3dB better. Is the mod worth it? Guess you'll have to try it out...
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Bruel & Kjaer 4011, DPA 4018 VL > MMP-A, MBHO MBP 603 - KA/200
Soundfield ST-250
Lunatec V2 (x2), Lunatec V3 (x2), Apogee Mini MP, Apogee Mini Me
Oade M248
Sonic AD2K+ / Mytek Stereo 192
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AM Sorcerer, Presto II, Hyperconductor - Teddy Gak XLR's - DPA 33' XLR