Version 7.1 of the CIS Controls completely revamps how organizations should prioritize their cybersecurity activities with the introduction of Implementation Groups (IGs). Many organizations are working with varying resources, expertise, and risk exposure. But in our experience, organizations of every size and complexity still need more help to get started. They provide an effective, coherent, and simpler way to manage an organization’s security improvement program. I’ll finish with a gallery of full resolution images if the internals of this amp, which, d espite needing occasional TLC, is a pleasure to own and sounds splendid.The CIS Controls are internationally-recognized for bringing together expert insight about threats, business technology, and defensive options.

One thing that did help a lot was removing the circuit board and re-soldering many of the joints, particularly around mechanical components like sockets and switches. What I really need to do is remove them and give them a thorough internal clean. They are an unusual design and spares are not available. Mine have been attacked with switch cleaner on many occasions but still occasionally cause me trouble. The real bane of these amplifiers in their twilight years is the input selector switches. I ended up using an external headphone amplifier instead. It’s all a bit useless though, because plugging in headphones does not mute the speakers. I fitted the missing headphone resistors when I had it apart.

Features have come and gone on the Cyrus over it’s production life, including the provision of a headphone socket. The Circuit board is common to the Cyrus One and the more powerful variant, the Cyrus Two. I’ll see if I can get the correct parts before resolving to that. I sourced some replacements, but they have a slightly different pin layout, so cannot be fitted without drilling the board. The input sockets needed a really good clean, and they still occasionally give me a bit of trouble, so I will be replacing them at some point. Mine needed a little attention, but since I only paid £15 for it second hand, I shan’t complain. It is about the size of a shoe-box but manages to cram everything required in without being cramped. This amp is a masterpiece of industrial design. This is one of the later ones, with the heavy cast chassis, toggle power switch and 5 inputs. I have a magnificent Mission Cyrus Amplifier which is the heart of my system.

Mission cyrus 1 v 7