Is D for Dry? Class D...

Jeff Rowland is reading...and taking notes

He doesn't have to take notes, as NO WAY you’d see JR doing high wattage/current signal transfer through those sorts of contacts, EVER!.

Cheers George

Ralph, don’t skew things around "to seem" to suit your next product.
I did not say "won’t handle", I said will not get "the best" out of the Alexia’s bass because of it loading.
We have the Alexia’s here in front of us and know what they like to get the best out of them in the bass, and it’s not Class-D yet. (Maybe in the future when they can come close to doubling from 8ohm to 4ohm to 2ohm wattages like big better linear amps can)

Again, according to Wilson themselves, the speaker does not suffer any performance loss strictly on account of class D. Some class D amps are not as good as others just as some class AB amps aren't as good as others.


And for the record I'm not skewing things. To be clear, if you want to get '  ' 'the best' out of the Alexia's bass', a class D amp can do that as well or better than a regular class AB amp. Here are the provisos:IF-
1) as long as it is designed with the same current in the power supply as the AB amp2) as long as it has adequate heatsinks3) as long as the output section as the same current ratings in its output devices-then it will make bass no worries, with 'the best'.

This is nothing about our upcoming product so much as its about Ohm's Law.


I was a bit astonished that in the face of advice from the speaker manufacturer in question that you were continuing to hang on to your position, which they regard as nonsense.


Now it may be that you are actually comparing some class AB amp against a particular class D amp on that speaker- and I'll totally give you that anecdote. But anecdote is not proof of your position (its a data point at best); if that is what you are experiencing then I advise you look for a different (probably newer) class D of more competent design. If you need tips on what to look for here are a few:1) avoid amps with SMPSs as most SMPSs will current limit if they are off the shelf units. Get one with a more traditional power supply.2) look for units that, if using feedback, are of the self-oscillating variety. The Hypex is a good example.2) The input circuit, if installed by the ultimate builder of the product, should use high quality opamps operating at low gain. Even though I like tubes, they are very difficult to use properly as the input circuit because the comparitor input impedance is so low. This will make it hard for the resulting amp to have good low frequency response.

OK, so at long last it appears that the LSA Voyager has finally dropped, so we will have another piece of equipment to squabble about.
https://www.underwoodhifi.com/products/lsa-electronics

Otherwise, all that I can say is that, given Alberto Guerra's career in the industry and that of his principal decrier, I know whose opinion I would heed more.

never heard a really really good one. The best are only ok.