Class D is just Dandy!

But any speaker manufacturer worth his salt will tell you that doubling up on low order high power filters at or around the same area has it own set of problems with ringing ect.

While this is true, this does not translate to the filters used in a class D amp, which is operating well outside of the audio band. The filter on a class D amp is blocking the switching noise of the amp and nothing more; it does not pay to have that filter go any lower than need be on order to be effective.

If the amplifier is switching fast enough, the internal inductance of the speaker itself is often enough to block the switching noise.

Pokey--don't know what "specs" you are talking about.  That was solely based on listening.

Anyway, class D is all over the place, probably in the TVs, the music at the local bar, some powered speakers, etc.

I don't notice the odd effect in the class D amp in my sub.  Seems to work just fine, there.  Like after a kid touches a hot stove, just avoided them for consideration as a primary amp, for the past decade.  A lot of folks really liked them, then, too. 

Just seemed to me that there's a harder line between class-d lovers and haters than with some other products.  So, that and my ten-year-old story led to what I thought was a legit question.  Whether there is something about class-D or some sonic effect that some folks can hear and others can't, whether knowingly or not, beyond just good or bad hearing.  Like--DLP TV, asparagus pee, tongue rolling, soapy cilantro, etc.  Most people thought I was trippin' out with the DLP thing, and I suspect some folks who like class-d think the folks who sense this effect are nuts, too.

Love tubes, but, damn, they are killing me in the small rooms when it's 108 degrees out, and the AC vent can't keep up.  Might be time to give a serious listen to some newer class d.  If this "effect" has been remedied, or if I was just imagining it all, maybe a summer amp?

Interesting and informative thread.

You should get your facts right. It’s not N-Force, it’s NCore

Really!! I stand corrected.

And there is no modification to NC-500 module itself.

We were told different by the importer/demonstrator, unless he had it wrong.

Why should various amps based on circuit boards of the same technology (NCore) and made by the same company (Hypex) sound different?

I wonder, could it have to do with what the demonstrator told us???

Cheers George

If this "effect" has been remedied, or if I was just imagining it all, maybe a summer amp?

Design plays a huge role! Some amps are not very involving and some are.

Some class D amps employ Delta-Sigma processing, some are simple Delta, some are self-oscillating (the latter require loop feedback to operate correctly, the former two can operate with zero feedback with careful design).

Scan frequencies can cover a wide range. Some have dynamically variable scan frequencies. Some amps employ op-amp input circuitry for the audio, others are discreet and its even possible to have passive input circuits.

So with all these variants you just have to try one out and see if it works for you.

Hi Everyone,

Just FYI, Mytek has just posted info on their Class D amp to their web site.

The Mytek Amp fits perfectly under a Brooklyn DAC for a little under $2k. Order with the Brooklyn DAC and you get a $500 package discount ($3500 or so) which is a really good deal.

More here:

https://mytekdigital.com/hifi/products/brooklyn_amp/

For the power rating (250W/Ch) this is one of the smallest Class D amps I’ve ever seen.

I can’t wait to look inside it! :)

Erik