Let me take the time to answer your questions individually.
1.
a. Yes, I am selling those amps you mentioned.
b. They are not "about $100" in components, or anywhere close to that figure.
2.
a. They are not $250 in profit, or anywhere close to that figure.
b. Absolutely, I've built a John Curl preamp and a BOZ preamp, read various white papers, exchanged emails with Pass, etc. They aren't exactly the most eclectic men in audio.
3. This thread was made purely in the DIY spirit, as the large TK2050 thread doesn't exactly allow quick access to successful mod lists.
Other facts:
-Did I link my amps here? No. This is my personal amplifier that I have modded.
-These exact mods are $50 in parts from mouser.
-I don't sell modded amps, and I even say that "I was not impressed" with the very version amp that I am selling.
So please, come back and ask me to "admit financial gain"
To be realistic, you need to make a sale in order to make a profit and it appears he hasn't.
Profit is what is left after all expenses are paid, including the manufacturing cost (ie: your own effort - is it worth nothing?).
Quite a few people make $250 or more in one hour for doing considerably less.
I doubt that.
You can say that it costs $100 to build as much as you like, it wont change the fact that it doesn't. You're simply making up a number without truly considering all the parts and their costs.
As John says, I don't think Grip is making a killing. They aren't flying off the shelf.
But as he has put the amp up here for comment, so comment is due. Eva made some good points and perhaps these could be explored further. Most of us are here to learn. Class-D isn't the easiest thing in the world, so it's great to point out what works well and what does not. It isn't common knowledge.
But no need to get nasty about it, right?
But as he has put the amp up here for comment, so comment is due. Eva made some good points and perhaps these could be explored further. Most of us are here to learn. Class-D isn't the easiest thing in the world, so it's great to point out what works well and what does not. It isn't common knowledge.
But no need to get nasty about it, right?
Sure, but not off the backs of the helpful and knowledgeable folks here...(of course we know better)
I may be interested if the Cigar box amps if the boxes were, say, filled with Arturo Fuente Don Carlos #4 cigars...actually, you can leave the amp out and just send me the 'gars.
All kidding aside, you really need to think about where you are going with this.
BTW - I am a big Tripath Fan....and liked them so much I bought thousands of shares - now worthless shares - of Tripath stock... now a big owner of Cirrus Logic - they now own all the IP of Tripath...
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I like where that is going.
Mostly a Punch man myself, but I've had some mighty tasty Arturos, too. Gives a new meaning to "Burning Amp."I'm willing to cut Grip some slack. He may not be doing it right, but a least he's doing it! A lot more than so many can say.....
OK, back to the topic... seeing as I would really appreciate a thread as gripracer has described, consolidating all of the best mods people have done to this board, for quick reference.
I'm ABOUT to purchase the 2 channel sure board and an SMPS and I want to order all of the parts for modding at the same time, so I need to figure out what those are.
Seeing as how gripracer's mods aren't entirely agreeable... how about different people giving input as to what mods they would do to the board?
How about a simple (numbered) list of mods, in order of importance, and the parts required for the mod.
Also... question. I'm looking at this SMPS :
36V DC 9.7A 349.2W Regulated Switching Power Supply_Industrial Power Adapter_Boxed Industrial Power Adapter and Chargers and Transformers_Measure Power Adapters_Sure Electronics' Webstore
It's the meanwell 36v 9.3A. Buuuut... it switches at 25khz. Is this going to be a problem? In another thread I noticed a guy was using a 24v Meanwell that switched at 70khz. I really need the full 36 volts though.
I'm ABOUT to purchase the 2 channel sure board and an SMPS and I want to order all of the parts for modding at the same time, so I need to figure out what those are.
Seeing as how gripracer's mods aren't entirely agreeable... how about different people giving input as to what mods they would do to the board?
How about a simple (numbered) list of mods, in order of importance, and the parts required for the mod.
Also... question. I'm looking at this SMPS :
36V DC 9.7A 349.2W Regulated Switching Power Supply_Industrial Power Adapter_Boxed Industrial Power Adapter and Chargers and Transformers_Measure Power Adapters_Sure Electronics' Webstore
It's the meanwell 36v 9.3A. Buuuut... it switches at 25khz. Is this going to be a problem? In another thread I noticed a guy was using a 24v Meanwell that switched at 70khz. I really need the full 36 volts though.
This might not help Artcore, since he says he wants 36v, but I have a spare 24v Cosel SMPS if someone is looking. I bought two from an ebay auction but only wound up needing one. It's 150 watt, model LDA150-24. Here's Cosel's full test report on it: http://www.cosel.co.jp/dl/dl.php3?f=lda150w-24-100v.pdf&k2=D1&ext=.pdf&d=LDA&s=LDA150W . The two cost me $36 delivered, so if someone wants it, I'd pass it on at $18 + S&H. (If it's inappropriate to post this here, I apologize! From panomaniac's comment, I thought it might be helpful to someone.)
Mike - IMO, they are better than a $72 TKD conductive plastic, and certainly better than an ALPS "blue velvet" or RK097. Those are the only three I have tested it against.
It also sounds very similar to using a pair of CMF55 Vishay/Dale 1% 50ppm resistors in the signal path. In other words, I don't think they can be beat for the $.
I really want to test them against the real thing to see what they'd be like. Probably not much difference.
It also sounds very similar to using a pair of CMF55 Vishay/Dale 1% 50ppm resistors in the signal path. In other words, I don't think they can be beat for the $.
I really want to test them against the real thing to see what they'd be like. Probably not much difference.