McIntosh MHT300 20Hz-20kHz Frequency Response

@faustuss Your answer sounds like a sorry fanboy excuse for failing to pass the same class everyone else did (ie Marantz, Denon, Onkyo). It was almost as good as McIntosh's answer. You obviously don't use speakers and subs below 20Hz to even have that concern when shopping around. Bone up on that.

@bartsw 

Electronic Specifications
FTC Power Output Rating
120 W
Power Output per Channel
150 W into 4 ohms with ALL Channels Driven
120 W into 8 ohms with ALL Channels Driven
Number of Channels
7.2 (expandable to 7.2.4)
Total Harmonic Distortion
0.05%
S/N below rated output
85dB (95dB below rated output)
Dynamic Headroom
4dB
Damping Factor
8 ohms: >100
4 ohms: >50
Rated Power Band
20Hz to 20kHz
Frequency Response
+0, -0.5dB from 20Hz to 20kHz < all this says is that from 20Hz to 20Khz the frequency response will be no greater than +0 dB or less than -.5 dB not that the bass is down .5 dB at 20Hz. .5dB who freeking cares! You can’t hear it!

I think I should have stopped at the power rating and realized it's not what I need. They don't follow FTC standards consistently on all their products, nor do other brands.

@faustuss Below 20Hz, it's about feeling it, not hearing it.

@bartsw 

@faustuss Below 20Hz, it’s about feeling it, not hearing it.

All types of audio amplification have a much wider frequency range than is specified in the McIntosh documentation. Essentially, the frequency response below 20Hz rolls off a specific rate for that amplifier of say 3 dB per octave meaning the response would be down 3 dB at 10 Hz. Likewise, the high frequency response being a wide band amplifier which the MCH300 is, the high frequency response is likely down by 3 dB at 100Khz which is ultrasonic and out of the range of human hearing.

The Mc’s bass can be boosted or cut 10 dB which will ameliorate or increase the -3 dB natural roll off in the amplifier’s frequency response. In addition, you can choose up to ten different hinge points between 40 Hz and 250 Hz to optimize your main speaker’s low frequency roll off to your subwoofer’s optimum crossover frequency. There are also main speaker settings for size including your front and satellite speakers, so they better integrate with your subwoofer’s crossover. There also LFE and digital signal processing that can be incorporated as well. 

No simple rationalization as to the quality of products capabilities is really appropriate.

I forgot to add that the two subwoofer output channels are preamp level and the main amplifiers frequency response has no bearing on the subwoofer output preamps frequency response which isn't specified anyway.