If you are curious about the SNR, Audioholic's review, listed above, has a nice graph of the SNR and stated "The Model 5000 exhibited a commendably good noise floor of around 80-83dB at 1 watt, A-weighted." Bear in mind, 1 watt is when your signal to noise ratio will be at its worst. If you have questions about what this means in your real world environment, comparing SNR with other amplifiers, or have other questions about the Model 5000, we can always be reached M-F 9:00am - 5:00pm EST at (866) OUTLAWS.