As is common for SCP articles involving electronic equipment, this avoids the "it's Safe, just turn it off" argument by making it operate without power.
It doesn't merely operate without power: In the first paragraph discussing the effects if disconnected from speakers and audio, it states that "SCP-2167 also manifests both of these effects when disconnected from a power supply." Is there a better way to organize this paragraph to make this fact more prominent?
In addition, the Description notes that the amp has been disassembled and parts replaced. Does this stop the automatic anomalous effects?
No, it doesn't, and actually makes them worse. This and other aspects will be covered in a supplement I am working on entitled "A Brief Explanation of Demonics".
Even given its automatic operation, the Containment Procedures seem entirely too complex. If storing it in a disassembled state won't work, has a Faraday cage been tried?
Was tried, didn't work; effect does not depend on EM transmission.
And why use a CD player with classical music/easy-listening? That seems like too many mechanical components that could break (as well as music that could vary in volume too much) - why not a radio or an electronic feed?
When it was first contained in the 1970s containment used a vinyl record player, due to a perception that vinyl records were more stable to the influences of anomalous things than magnetic tapes, but there were always issues with various parts of record player and the vinyl records themselves wearing out, requiring frequent maintenance.
Containment was modified to use audio CDs when they became available in the 80s, reducing maintenance costs significantly. When computerized audio players became available, it was decided to continue using CD media, again because it was perceived as more stable than flash or magnetic hard drive storage. Additionally, audio CDs have a very high IGIS value, so their containment potential in case the CD player fails is fairly good.
The reason that there are still vinyl records stored alongside SCP-2167 is a relic from the switchover to using CDs, when the reliability of the technology was not fully confirmed. Thus it was decided that some vinyl records should be kept to assist in containment, in case a previously-unknown type of degradation occurred with the CDs rendering them unable to fully contain SCP-2167.
You wouldn't even need a signal - you could amplify static or a single tone
(Note, I am editing it to just be classical music.)
But that doesn't fit what I had in mind for it. It just doesn't. Having classical music blasting throughout the facility, with 682 smashing down walls and massive explosions in the background, is a hundred times better than the same scene with static or a single deafening tone.
For some reason the idea of a chair in the testing suite really irritated me
The chair is specified as part of the golden cuboid arrangement - any testing needs to be done under standard acoustic conditions to be reliable, and that includes the position of the test subject relative to the speakers and room.
couldn't you have tests in the sound-proof locker (which presumably should also be a golden cuboid)?
I would assume that the locker used would not be of an appropriate size to conduct testing. I imagine it as stored in just one small locker of many in a large storage area. This is actually a cost-cutting measure, originally it was just contained in the test chamber but it was determined to be of low-enough risk that it could be stored long-term in a containment locker.
The first two paragraphs of the description don't tell us what the anomaly is, and spend a lot of time covering details that could be assimilated by the reader based on the picture, and the sentence "SCP-2167 is a "Gauchito-78" audio amplifier."
You are assuming that every reader is able to see the image, while this may in fact not be true, whether from physical impairment or technological limitations of the system being used to view it. In general the text ought to be able to stand on its own, and the images serve only as supplementary material. (The only reason I didn't provide a description of the SEM imagery is because it depends on iconography that would be meaningless to a blind person anyway.)
The final addendum left more questions than it answered. If this was being used in a private residence, how did the Foundation learn of its existence? More to the point, how did the Foundation learn of its existence in a way that didn't involve a public incident worth mentioning in this report? And what's with the stray "W" left unredacted in the name?
I had a recovery log in an earlier version, but it was recommended that I cut it because it didn't add much. But to summarize: Mr. █████ W██████ was acquitted of charges (disorderly conduct, disturbing the peace, interfering with an officer of the law, reckless endangerment, etc.) resulting from his using SCP-2167 in a music concert, based on sound pressure measurements at the event in question. This led to local papers running stories about it, the Foundation catching wind of something amok and investigating.
The reason for the unredacted "W" was because his name was used multiple times in the earlier version. You can't identify someone by just the first letter of their last name so it isn't a security breach.
And the final reference to "infinity and beyond" was confusing. Is it anachronistic (which was my interpretation based on the look of the amp and the reference to '78, although there is no information on when this was made) or did the maker of the amp steal the phrase from Pixar?
If you look at this google ngrams plot, the phrase "to infinity and beyond" surfaced in 1933, well before this device's supposed date of manufacture.
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