This amp is a monster to be completely honest. It is an all tube (EL-34), 40 watt master of tone and versatility. It comes with foot-switchable clean and overdrive channels, each with their own respective voicing switch, as well as some astounding built in reverb. There are 2 types of reverb on this amp (Light and Dark), the light one giving much more definition to the high end, and the dark focusing on the lower sound spectrum. The reverb can also be turned on and off by the footswitch.
I was very pleased by the way the amp was configured in terms of EQ (Treble, Bass, Mids, OD Gain & Volume). The EQ is kept solid and simple and applies to both the clean and OD channels. For those sceptical about wanting to have separate EQ parameters on clean, the single tone knob on the clean section is all you need. Trust me. The most impressive feature about this amp is the Blackstar ISF knob, which can change the amp's sound from a traditional British tone to a brutal American amp tone. The Celestion speaker in this thing can really push air, and the more you break in the speaker the more rich the tone sounds. I don't even play this thing 2/3 on the master volume, and when my window is open during practice my neighbors say they can hear it from at least 30-50 yards away.
The voicing switches are amazing as well, adding moree dimension to the already insane amount of tones you can get out of the amp. Seriously, this amp is sensitive to any change in EQ, Gain, and ISF, meaning that you can sit there for hours and just punch in tones to recreate classic sounds and find your own. But finding a great tone is just as easy as turning it on. The only thing that I wish this amp had was a way to toggle between channel voices without actually having to push the button on the amp itself. I have gigged with this amp and know for a fact that it is more than capable for a live performance. The louder you crank it, the better it sounds. It keeps the cleans squeeky clean even at high volumes, and keeps the distortions as soft or brutal as you want.
I use a Fender Telecaster Deluxe with Black Dove P90 pickups I play mostly classic rock, bluesy type stuff, and some 80's metal. All I can say is about the sound of this amp is that it sounds better than the sound in my head. This amp can do almost anything, any tone and any genre with the right settings punched in. I was surprised to see that this thing could even pull off pretty brutal metal tones without a distortion pedal. The HT-40 can reproduce a Fender-esk sound with sparkling, glassy clean tones with the tone knob set at about 7, and fatter/darker tones with less tone dialed in. These tones can be further tailored by playing with the clean voicing switch. To be totally honest, I don't spend a whole lot of time on clean for the simple fact that I am ADDICTED to the distortion channel. It can reproduce almost any sound you want or could ever need. Dialing back the gain cleans up the distortion surprisingly well, and playing with the EQ adds onto the fun of tone hunting.
The ISF knob is awesome as well, changing the shape of the sound from everything between fat, chunky British to tighter American tones. With the voicing switch in the out position, the sound is much more suitable for rhythm/ crunch. I'm not saying you can't wail on this channel, because you definately could, but with the voicing switch engaged, it kicks this amp into f--king overdrive. This thing SCREAMS, allowing for some amazing lead tones that can't be described as anything less than astounding.
The best part is that I know that if I ever get bored with the current tone or need to cover a song, I can just make a few adjustments and bang, almost totally different sound altogether. This is a lead guitarist's dream, especially for the price range. I've only had it for about 1 and a half months, but I know I won't need anything else until I start playing substantially larger venues, but even then there is a jack for additional speaker inputs. To be frank, if you love anything that is rock n' roll, you will adore this amp.
It has a sturdy build and looks very strong and durable. The footswitch looks like it can also take a beating. I would trust this amp to pull off any kind of club gig with no backup, and has more than enough power to keep up with even the loudest drummer and cut through the band with distinct definition.
I love this amp with all my heart.