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Post by Johnkenn on Mar 19, 2015 13:21:58 GMT -6
Because I have no idea what I'm talking about  I know dandeurloo's DIY amp sounded really good. Think it was Class H? Compared to my Lexicon 212 (Bryston 3BST), it had more bottom and a smoother top. I think he mentioned it was about $2K though. Maybe that's including price for build, though. Is there a way to rival these top shelf amps without mortgaging the house? |
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Post by svart on Mar 19, 2015 13:29:48 GMT -6
Some of the bridged "gainclone" style amps will rival the big discrete amps for fidelity. They sound a bit sterile compared to others but they are generally the flattest and most predictable amps out there. Lots of audiophiles that don't need high wattage have turned to the chipamps and love them. This is kinda old news though.
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Post by Johnkenn on Mar 19, 2015 13:34:32 GMT -6
I'm a DIY virgin |
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Post by jfoc on Mar 19, 2015 16:06:01 GMT -6
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Post by ppa on Mar 21, 2015 18:57:57 GMT -6
Some of the bridged "gainclone" style amps will rival the big discrete amps for fidelity. They sound a bit sterile compared to others but they are generally the flattest and most predictable amps out there. Lots of audiophiles that don't need high wattage have turned to the chipamps and love them. This is kinda old news though. I have designed a gainclone amp and I agree with you. Moreover I have designed an discrete amp module that sounds much better than gainclone, it has 100W on 8 ohm and 180W on 4 ohm. |
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Post by ppa on Mar 21, 2015 19:04:35 GMT -6
I have paid a lot less than 1k USD for a stereo unit based on these my amp module.
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Post by tonycamphd on Mar 22, 2015 0:31:08 GMT -6
I hope dandeurloo chimes in on this, seems he may not be talking haha... ppa any available info on your amps, do you sell them? |
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Post by ppa on Mar 22, 2015 15:45:54 GMT -6
I hope dandeurloo chimes in on this, seems he may not be talking haha... ppa any available info on your amps, do you sell them? Dan does very good metal works, if my module may be used on an his chassis for me its a good thing. Regarding my amp module, it is an audiophile amp and it uses a discrete symmetrical topology with out stage on class AB that has been used in some high level amps for its very low THD. This module has an high max output peak current to handle high current transients on low loads to have an high dynamic. This module has the PSU onboard to avoid the cost of an added board and reduce the connections impedance between PSU and out stage amp section. This board is compact and not expensive. EDIT it can be used for amp with 6 channels too. |
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Post by svart on Mar 27, 2015 12:35:14 GMT -6
I hope dandeurloo chimes in on this, seems he may not be talking haha... ppa any available info on your amps, do you sell them? Dan does very good metal works, if my module may be used on an his chassis for me its a good thing. Regarding my amp module, it is an audiophile amp and it uses a discrete symmetrical topology with out stage on class AB that has been used in some high level amps for its very low THD. This module has an high max output peak current to handle high current transients on low loads to have an high dynamic. This module has the PSU onboard to avoid the cost of an added board and reduce the connections impedance between PSU and out stage amp section. This board is compact and not expensive. EDIT it can be used for amp with 6 channels too. I'd like more info on your amps, please. Specifically, how do we buy them? |
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Post by acegunn on Mar 27, 2015 14:46:56 GMT -6
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Post by kcatthedog on Mar 27, 2015 15:40:04 GMT -6
So do you/can you buy two and the chassis and have a dual mono paired amp for stereo sources ?
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Post by ppa on Mar 27, 2015 19:04:42 GMT -6
So do you/can you buy two and the chassis and have a dual mono paired amp for stereo sources ? yes, is possible making an stereo dual mono amp using two modules, just adding two toroidal transformers (and fuses and power switch) and the chassis. |
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Post by ppa on Mar 27, 2015 19:09:53 GMT -6
Dan does very good metal works, if my module may be used on an his chassis for me its a good thing. Regarding my amp module, it is an audiophile amp and it uses a discrete symmetrical topology with out stage on class AB that has been used in some high level amps for its very low THD. This module has an high max output peak current to handle high current transients on low loads to have an high dynamic. This module has the PSU onboard to avoid the cost of an added board and reduce the connections impedance between PSU and out stage amp section. This board is compact and not expensive. EDIT it can be used for amp with 6 channels too. I'd like more info on your amps, please. Specifically, how do we buy them? Just pm me by RGO, please, but the matter is that I have not yet calculated the street price. I will do it tomorrow, I hope. |
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Post by ppa on Mar 27, 2015 19:13:20 GMT -6
I would present the amp module at RGO for first. |
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Post by kcatthedog on Mar 27, 2015 20:18:01 GMT -6
So do you/can you buy two and the chassis and have a dual mono paired amp for stereo sources ? yes, is possible making an stereo dual mono amp using two modules, just adding two toroidal transformers (and fuses and power switch) and the chassis. Hi, I have built the psu 's for my c12 and mk-u47 microphones, so I understand what you are referring to but with out clear instructions I wouldn't be able to do it. Might you consider creating a guide that illustrates how to make the dual amp stereo unit. I understand that one would build the two separate mono units but not how the Toroidal transformers would be wired nor what operating characteristics they would need , other than for the European and or north america voltages. Thank you. |
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Post by ppa on Mar 28, 2015 17:00:36 GMT -6
yes, is possible making an stereo dual mono amp using two modules, just adding two toroidal transformers (and fuses and power switch) and the chassis. Hi, I have built the psu 's for my c12 and mk-u47 microphones, so I understand what you are referring to but with out clear instructions I wouldn't be able to do it. Might you consider creating a guide that illustrates how to make the dual amp stereo unit. I understand that one would build the two separate mono units but not how the Toroidal transformers would be wired nor what operating characteristics they would need , other than for the European and or north america voltages. Thank you. yes, I will do a guide for these ones. But not all transformers are the same so the wires color may change for different models. However I will included on the schematic the models that're more used and not expensive. |
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Post by kcatthedog on Mar 28, 2015 17:25:14 GMT -6
understood and thank you, just need to know voltage requirements and primary and secondary connect points.
the bom for max's mk-u47 came speced with 2 transformers so people could order what they preferred and directions for either install.
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Post by Johnkenn on Mar 28, 2015 18:15:47 GMT -6
This is unfortunately above my learnin' level
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Post by tonycamphd on Mar 28, 2015 19:11:23 GMT -6
understood and thank you, just need to know voltage requirements and primary and secondary connect points. the bom for max's mk-u47 came speced with 2 transformers so people could order what they preferred and directions for either install. we need to know a lot more than that, i'm sure ppa will specify everything needed, his gear page at GDIY is very well done, no worries. |
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Post by kcatthedog on Mar 28, 2015 19:19:21 GMT -6
agreed Tony, I just meant that we can see the basic amp build on the pcb but I am not going to start screwing around with 200- 300 vdc toroids without very explicit instruction; hey lets play catch the psu in between IECST (inadvertent electro convulsive shock therapy); no thanks . |
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Post by ppa on Mar 29, 2015 11:47:19 GMT -6
agreed Tony, I just meant that we can see the basic amp build on the pcb but I am not going to start screwing around with 200- 300 vdc toroids without very explicit instruction; hey lets play catch the psu in between IECST (inadvertent electro convulsive shock therapy); no thanks . For the gainclone I have done two application notes for 120V and 230V AC and people appreciated them so I will do same for this module, but the main rule is that very explicit instructions are important but eachone should investigate himself if he is really skilled to build this PSU uder the needed safeness before buying it. BTW he could ask help to a skilled person to get the amp under the needed safety rules. |
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Post by kcatthedog on Mar 29, 2015 12:10:13 GMT -6
Al understood thanks wil look forward to seeing the instructions !
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I know dandeurloo's DIY amp sounded really good. Think it was Class H? Compared to my Lexicon 212 (Bryston 3BST), it had more bottom and a smoother top. I think he mentioned it was about $2K though. Maybe that's including price for build, though. Is there a way to rival these top shelf amps without mortgaging the house?
