Switched to Class D or get left behind?

[Kingrex]

Me. But I'd be happy to look at evidence to the contrary. You know the Alex is a 1-2ohm pathological case load, no?
Or is that a requirement for a gotcha??


Cool story bro. A bit fuzzy on the details though. Especially the middle part. What "500w D plate" driving what 12 maybe 15 sub?

Ever heard of Wishful Thinking Fallacy?

Its hard to see. Tower speakers driven by Paragon 5 channel class AB 100.watt each anp. 1 paragon per speaker. Each driver gets a amp channel.

Subs also by Bob. He prefers his subs over SVS18S when he uses his Krell.

All drivers use DSP to cross them over. I think he is using Dayton DSP 408 crossovers.
And, he uses a BACCH for crosstalk cancelation. And to measure what is going on in the room, then to adjust the DSP accordingly.
He says he has it dialed enough the BACCH ORC is not really heard when engaged. So he does not use it.
Point being, he has a hard time integrating the subs to the mains if he uses a 500 watt class D plate amp. Hie Krell works best.

 

[atmasphere]

All you are saying there are cheap chips and expensive chips.

Uh, FWIW Dept.: class D amps that use modules don't use a 'chip' like the less expensive class D amps (like Fosi, Topping and so on, which tend to use TI class D integrated ICs) do.

Modules are composed of various chips like comparitor chips (although IIRC, the original UcD did that function with discrete devices), driver chips, opamps and so on. Modules are more expensive to construct and often have custom heatsinks. So its likely to be far more than just a $100 difference. We pay more than that for our heatsinks alone, which have to be machined to a pretty tight tolerance to interface properly with the GaNFETs.

Point being, he has a hard time integrating the subs to the mains if he uses a 500 watt class D plate amp. Hie Krell works best.

That does not sound like a problem with the amp controlling the driver. It sounds more like an interface problem into the rest of the system. One way that can happen is if the sub is crossed over too high. Another problem can simply be gain. If the amp is outside the crossover's ability to provide enough gain you'll certainly have a blend problem.

Without knowing a lot more or actually being there, its all speculation of course...

 

[AJ Soundfield]

Point being, he has a hard time integrating the subs to the mains if he uses a 500 watt class D plate amp. Hie Krell works best.

So nothing whatsoever to do with "Class D" and everything to do with a whole mess of DSP in front and mystery brand, model X "500 watt" dsp plate amp. Cool