Sorry @recluse but I recommend the DIYaudio website as a great place for electronics noobs to get help and advice.
Best,
Erik
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Sorry @Ketchup, I can't imagine the need for bridging those amps, but I do see you increasing your complexity dramatically.
I'm not sure what the impedance would be, but you can find it from their data sheets.
I'd like to strongly suggest to you that you get a stereo pair, and see if you feel there's any need at all to do more.
Best,
E
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Hi @ketchup
Not really, but the impedance would drop to 4k.
Most solid state pre amps would have no issues with this at all, but some tube may.
However, maybe what you really want to do is active biamp? Hypex sells active crossover modules as well.
Best,
E
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What are you guys doing to get around the low input impedance of the ASP
modules? I think it’s around 7-8K ohms. My preamp’s output impedance is
200 ohms. That's not good, right?
Hi @Ketchup, 200 should be fine!! It's usually recommended that there be a 10:1 ratio, so you'd have more than enough. Best, E |
Hey @evelyn1
Let us know what you think!
Best,
E
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@rotarius
That is an interesting find! 300W/channel, and uses a very high (relatively) 2.1 MHz switching frequency!
It would be really nice to see frequency vs. phase plots for these amps.
Best,
E
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I seriously doubt there's an SMPS in any audio amplifier that's as life
threatening as the big linear supplies resting in the heart of any class
A amp What's life threatening is high voltages. It only takes a few milliamps to stop your heart. I believe that switching power supplies have much higher peak voltages than linear amps of the same power. In the 200-300V range. The amplifier portion itself runs lower. This is all quite fuzzy and old knowledge so I can be wrong.
That thing takes nothing more than screwing boards into a box and
running wires to a power switch and signal posts. I can't imagine it
being more simple than that.
And this is also true. Assembly is dead simple. Keep your fingers and tools out of the way when it's on, and be aware the caps can maintain a very high voltage even after they are off. Best, E |
Belles reference 150 v2 class ’B’ amp Well, that certainly IS what is claimed. Interestingly, and sadly, none of the reviews I’ve found explain it. I know of no class B circuit which allows an amplifier to operate without significant distortion through the zero V crossing point, which is why I said earlier it couldn’t be. If I was reviewing such an amp I would have made it a point to explain this. I don’t know everything, and I’m not an EE, but this is now a very curious thing to me. This is certainly the first Class B amplifier I've heard of with high end cred. Best, E |
ICEPower and Hypex are some of the best amps on the planet, Well, I wouldn't go THAT far either. I haven't heard everything, and I haven't had a chance to compare them all with all sorts of speakers. I am however very very pleased with what I have.
But this is absolutely not something most members of this forum should
attemp to build (judging by the consistent daily posted nonsense) The kits are super easy to assemble. The IcePower units especially. Best, E |
But it's not just the modules. The input and output stages matter too. They do! Many Class D module makers provide the option to separate the input from the rest of the amp, providing a very low impedance interface. The vendor is then responsible for making their own. This could be tubed for instance. However, I'm not here to sell that idea. All I am here to sell you is that you can build very nice sounding monoblocks inexpensively, and if you are curious about Class D, and want to tinker, here you go. Both ICEPower and Hypex provide it all. The ASP modules have build in power supplies. The Hypex need you to purchase that separately. Best, E |
@marqmike
I have a class b amplifier I sincerely doubt that is true! :) It is A or AB. Best, E |
The Hypex kit is more expensive (<$1500 for a pair of monoblocks) but
better quality amps and it’s so easy, no soldering needed (first gen
kit did, but not current gen).
Allegedly better. Anyone who would like me to review and compare, please send me a pair... ;) Yes, if you are interested in NCore, look for Hypex Shop |
Since I am sure in moments all sorts of posts will appear to talk about how terrible sounding Class D amps I want to say this:
I've been listening to ICEpower ASP modules for years and they are really wonderful. There is no hint of anything they used to talk about Class D. They are not hard, they are not noisy, they are not compressed or clinical. They are very warm sounding, perfectly natural sounding amps which I cannot tell apart from linear amplifiers.
If you feel like dropping $1k to build yourself really nice stereo pair and listen for yourself, I encourage you to. I also don't mind if you like something else instead.
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