Here's a short clip of testing out a 25 year old dual motor Vacu-Maid S3200...technically a split can unit but the canisters are mounted right next to each other (pretty typical).
This unit would not have been this loud when it was new, but thanks to many years of debris passing through the filterless cyclonic separator and into the impellers, it's ear piercing.
This unit would not have been this loud when it was new, but thanks to many years of debris passing through the filterless cyclonic separator and into the impellers, it's ear piercing.