Hi Folsom.
Yes, we do have a Class D Hybrid design that uses a 300B or 2A3 front end tbat I have been running in my system for some time. Purity Audio does not normally do things conventionally. We removed it from our offerings at the moment due to availability issues with the Class D power section we were using.
We have a unique design that is an integrated 300B amplifier but the input stage is based on the 300B as well. Unfortunately this product is big and heavy (at least for a 300B amp) due to each stage having its own tube power supply. But the sound
Video realm? What do you mean by this?
We will be coming out with videos on our products if thats what you mean. We will have a video on each page describing the product and and one for a video version of the manual.