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Post by trubshaw on Oct 16, 2023 11:02:29 GMT -6
I've done the mk1V upgrade on both my uln8s. The sound is improved, but it was already great. Seems more tightly focussed now. I use mine every day - they're super reliable and just do everything I want them to.
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Post by petergreeny on Apr 18, 2024 20:25:25 GMT -6
I'm about to order MKIV upgrades for my two LIO-8 3D units. I love the Halo ecosystem, though I've always found the converters a touch thin/brittle compared to my old Radar 24 Nyquist system or Cranesong HEDD converters. Here's an interesting description of the MKIV improvement from Metric Halo, written as a comment under their Youtube video detailing the MKIV field install:
"The Original AKM based analog board sounds great. The new mkIV board sounds better to our ears; it has lower converter latency, uses less power, and has unity gain analog loops. We believe that the bulk of the difference in the sound is down to the low-latency + custom filters, although the updated analog also plays a part. The low-latency filters have no pre-ring; while the higher-latency symmetric filters in the AKM parts we use on the earlier board have better spec sheet performance (better stop-band rejection, lower phase-shift on the high end) the pre-ring on the symmetric filters seems to add a small element of brittleness or congestion that we feel the new design removes. So to our ears, the mkIV sounds like a ULN-8 - just better."
If the new converters are as 'natural' or 'smooth' or ' nearer to analog' sounding as some of the remarks earlier in this thread suggest relative to the previous gen converters and analog stages, I think I'll be quite happy to have done the update. Fingers crossed and wallet bruised...
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