Glad you’re finding it useful.
I updated the database, which added a few manufacturers and added some models to existing manufacturers.
It is not, and will not ever be, exhaustive.
There are various reasons for this including, but not limited to, manufacturers not providing the necessary specifications and/or not doing so consistently (either within their own lineups or in relation to the rest of the industry*), model spam, lack of a single place to retrieve the specs etc.
The iOS app version does that.
There are some limitations though, primarily due to the fact that most amplifier manufacturers do not provide enough information to do the necessary calculations properly and directly.
Most simply provide n mW at r Ohms, often only for 32 and 300 Ohm impedances.
You really need to know how much voltage they can swing, how much continuous current they can supply, how low a load they can drive while remaining stable and what their output impedance is. The first two are rarely published, the third is even less common and the last is often omitted as well.
And that’s without taking thermal limitations into account.
The minute you have to start doing triangulated calculations, or supply “reasonable” values for missing parameters, you can wind up being off by a factor of 20 or more. And that can easily be the difference between having insufficient power, ample power, or a smokily broken amplifier.
So what I may do is simply provide a tool that takes the necessary direct inputs, requires you to find and enter the values yourself, and then it’s on you if you decide to fudge the OI or the voltage swing (etc.) and wind up with a dead amplifier or transducer as a result.
The only “selectable” amplifiers for that function would be ones for which I can get all of the necessary specifications from the manufacturers. That’s a very short list, at the moment.