This is my second Burson machine purchased. The first one was the HA-160D which I bought together with Audeze LCD-2 headphones. based on the very positive reviews from Srajan Ebaen from I was using it daily connected to my working desk and I was very happy with it. When I saw Timekeeper 3iR I decided to upgrade to this Reference class all-in-one solution as I plan to accommodate speakers on my desk, too. I have not bought speakers yet, so I can not comment on that. (considering LS50 Metas or Harbeth P3ESR XD) I have only tried the headphone section on the Timekeeper and though I can not say I really dislike it. I have got a little mixed feelings so far. I have been comparing the Timekeeper with the 160D side by side for the past two, three weeks, listening to same tracks over and over (connected to Windows PC, USB, (driver installed) listening trough TIDAL/ROON I have been having several issues with the Timekeeper, the main probably is that listening on the same volumes (30-35 high gain) as on the HA-160D I must continuously be lowering the volume as after several minutes the high frequencies get unpleasantly ear-piercing. The second issue is that comparing the midrange frequencies I find them more pronounced and present on the HA160 than on the Timekeeper. On the Timekeeper I find the vocals a little “hidden”. Regarding this machine I think it must by after the burn-in period as I bough it from you as ex-demo unit. I personally played music on it for 170 hours. Not sure if any longer burn-in time will make any differences. I was little surprised by mi findings as I expected the Timekeepers head amp to be substantial upgrade and so far I still find the HA-160D more enjoyable to listen to. I have not opened the Timekeeper yet but I guess there are Vivid Opamps installed by default, maybe changing for Classic Opamps will change sound will make the mid range a little more present, pronounced as it is on 160D? My main issue is that with HA-160D I used to work with the headphones for many many hours behind the computer. With the Timekeeper quite quickly my ears get uncomfortable and I need to take the headphone off. Should the headphone section of the Timekeeper be superior to 160D or is just the integrated stereo amplifier categorized as Reference series? Other issues I have with the Timekeeper: -the manual say very little information about the settings, for example I do not have a clue what those abbreviations means and what they are used for – when I rotate the volume knob in one direction occasionally the number on the display jumps backward (ie. 39, 38, 37, 36, 37, 36, 35) especially when I am moving with it slowly. This happens to both directions. I am increasing the volume but sometime it goes randomly one level lower and than continues to increase. Is this normal? – I installed the driver on Windows PC but when I go to SOUND SETTINGS > DEVICE PROPERTIES > ADVANCED DEVICE PROPERTIES > ADVANCED there is a list of values, however the list ends with 32bits/384Khz and there is not 32bits/768Khz value – The 192KHz files I play trough Tidal/Roon always play at 96Khz only. I try to read forums but I can not find out why this is happening. Could it be the USB cable I am connecting the machine to my PC. I am using standard 3.0 USB-A to USB-C cable, not audiophile grade cable. My experience with communicating with Burson I find very positively, especially communicating with Dennis, he is always quick to respond and helpful. Including several photos.