I wouldn't be as concerned about the damping factor of the amp as I would the tonal balance of the speaker it's driving, although bass control is NOT one of this amp's strengths. The Power 2 has two sonic deficiencies, a neutral but borderline lean midrange. And a tipped up midbass response. When I sold this amp, both of those qualities completely vanished from the speakers being driven at the time. So don't pair it with speakers that tend to be lean or bright. And don't buy speakers that need as much control of the lower frequencies.
Bottom line is that this is a powerful tube amp, but with shortcomings that don't make it an automatic slam dunk over comparable SS amps. You have been warned, but good luck.
Shakey