I know an extreme horn fanatic who does it like that. Although mid or high might be Class A.Class a/b for mids and highs. Class D for Bass.
A class-D amp is more difficult to troubleshoot and its going to have special high-density fine-pitch chips that are very difficult to replace. A repair shop (or the factory) would probably replace the whole board (if it's still available). The main-chip will usually be specialized and single-source so it may eventually become unavailable too.AB isn't inherently any more repairable than D.
I don't think that's true. Sure, there are probably very esoteric A/B constructs, but every class D is essentially always proprietary, closed firmware, darkware. Also, you probably need a large investment in diagnostics and special tools.AB isn't inherently any more repairable than D.
I think the KEF LS60 has two 100W class D (bass and mid) and one (i think 100W as well) A/B for the tweeter.I know an extreme horn fanatic who does it like that. Although mid or high might be Class A.
Kef quotes the amps for the ls60 as follows:I think the KEF LS60 has two 100W class D (bass and mid) and one (i think 100W as well) A/B for the tweeter.
I hope you don't mind me asking but I'm curious as to what you have playing 12 hours a day through 12 channels? Are these routed to different areas or some kind of crazy surround setup? Maybe just music for some kind of office/workshop setup?I was very hesitant to dive into the Class D amp pool. As a life long (the heavier the better) room heater Amp guy. But now going on 15 months driving 12 separate channels of my sound system @ 12 hours per day (Average) for an estimated total run time of 5,400 hours. Without a single problem or hint of distortion or clipping going as loud as I want and occasionally beyond. I am firmly transplanted to the Class D camp. Small footprint, light, cool running and gobs of headroom and efficiency. I needed a forklift to lift my old 5 channel amp. I can carry (2) Six channel amps in one arm. It defies my Subjective Brain that something this small and light can have the chops to drive 12 channels. But they do and they measure well under the Amir hammer. I highly doubt I will be going back.
Right.So the bass and mid drivers are powered with 500w and 100w class d amps. The tweeter has a 100w A/B amp.
Lots of Audiophools out there that don't like Class D because it sucked 20 years ago. Maybe it was a marketing decision after all?But it is interesting that they decided to use class A/B for the tweeter as we know that class D is just as good or better.
That sounds like assumptions from someone who's never actually repaired them, or has skill for one but not the other. It certainly wasn't true of the only class D amp I've had cause to fix, which turned out to be pretty close to International Rectifier's datasheet. A discreet output transistor had failed short and was easily replaced. There wasn't a microcontroller in the whole thing. Conversely the similarly failed but not discreet output transistor in a class AB amp couldn't be. The AB one had many more proprietary/unobtanium components in than the class D one, and needed a combination of buttons pressing at power up to stop the supervisory part turning it off again immediately.I don't think that's true. Sure, there are probably very esoteric A/B constructs, but every class D is essentially always proprietary, closed firmware, darkware. Also, you probably need a large investment in diagnostics and special tools.
Hi TK750,I hope you don't mind me asking but I'm curious as to what you have playing 12 hours a day through 12 channels? Are these routed to different areas or some kind of crazy surround setup? Maybe just music for some kind of office/workshop setup?
Ah very interesting! Thanks for the response, it sounds like you are making the most of your retirement which can only be a good thing. I hope one day I will be able to report similar numbers!Hi TK750,
I don’t mind and realize my above statement sounds like I am exaggerating. I have a 9.2.6 Atmos/DTS:X/Auro setup. I alike multichannel music in the morning and most of the day. Followed by Movies/Tv in the evening. So from about 0800 thru 2200 hrs my system is on and something is playing. Damn near every day 24/7/365. I am retired so this may make more sense. I use the hell out of my kit and apparently (reading what I just typed) I don’t get out much. In bed at night I use IEM’s to sleep with.
Other than the occasional headphone use and the IEM’s in bed. The above is all in one room. I hope this helps further explain my sickness…….