Thank you dear P nephew, i am waiting the correct ones to Precision 1
Fine..all them with me.... including the wrong files to Precision 1.. that one with misaligned transistors are here in Brasil...send me the one corrected asap.
My people already building...have informs of 8 folks doing, they will send me pictures and i will post.... Samba country will be playing Precision 1 and HRII.....now music here will be better to listen to.
Will order in brazil to build amplifiers to my friends..and neigthboors..hehehe....nothing to sell.
regards,
Carlos
Fine..all them with me.... including the wrong files to Precision 1.. that one with misaligned transistors are here in Brasil...send me the one corrected asap.
My people already building...have informs of 8 folks doing, they will send me pictures and i will post.... Samba country will be playing Precision 1 and HRII.....now music here will be better to listen to.
Will order in brazil to build amplifiers to my friends..and neigthboors..hehehe....nothing to sell.
regards,
Carlos
Just want to say that you can place your groupbuy orders for the P1 now on the dxamp site.
Recent exchange rate slump, seems to be mostly in your favour, as the price dropped quite a bit just through exchange rate, compared to first quote.
We decided to move the protection modules offboard as well and these are available as seperate modules...
Recent exchange rate slump, seems to be mostly in your favour, as the price dropped quite a bit just through exchange rate, compared to first quote.
We decided to move the protection modules offboard as well and these are available as seperate modules...
P1 orders
Nordic,
A few of us indicated our interest in P1 a few weeks ago -- do you have those "orders", or would you prefer for us to go to dxamp.com to place the orders formally?
I assume the latter, but just checking.
Thanks,
Francois
Nordic said:
Nordic,
A few of us indicated our interest in P1 a few weeks ago -- do you have those "orders", or would you prefer for us to go to dxamp.com to place the orders formally?
I assume the latter, but just checking.
Thanks,
Francois
Hi Francois, nice to have your support again.
I would appreciate it if you can head over to the site and do the order there, The cost of manufacturing is quite high due to the size of the boards, so this limits the numbers I can afford to order without finance in advance. Boards are offered at cost, with about 6% to cover fetching the stuff from the factory, and charges by the creditcard company.
I am haveing DC protection and slow start PCBs made too, picked up some chips for those this afternoon...
I would appreciate it if you can head over to the site and do the order there, The cost of manufacturing is quite high due to the size of the boards, so this limits the numbers I can afford to order without finance in advance. Boards are offered at cost, with about 6% to cover fetching the stuff from the factory, and charges by the creditcard company.
I am haveing DC protection and slow start PCBs made too, picked up some chips for those this afternoon...
Nordic,
I just plced an order on your website for a stereo set of Precision boards, and loudspeaker protection/soft start
I also prefer the L connection of O/Ps to heatsink, especially as flanged heatsinks are available here.
Audie
I just plced an order on your website for a stereo set of Precision boards, and loudspeaker protection/soft start
I also prefer the L connection of O/Ps to heatsink, especially as flanged heatsinks are available here.
Audie
Hi!
I also just placed an order for a stereo set of boards, including the PSU and protection modules. I've been lurking on this board for awhile, biding my time while I completed other projects (diy speakers, diy DAC, diy passive preamp). But having finished those projects and turning my attention to poweramps, I couldn't pass this up. I've been debating between the Symasym and one of Carlos' DX amp designs, but this Precision version looks pretty good. Can Nordic or Carlos give any thoughts as to how this compares?
Thanks!
Ted
I also just placed an order for a stereo set of boards, including the PSU and protection modules. I've been lurking on this board for awhile, biding my time while I completed other projects (diy speakers, diy DAC, diy passive preamp). But having finished those projects and turning my attention to poweramps, I couldn't pass this up. I've been debating between the Symasym and one of Carlos' DX amp designs, but this Precision version looks pretty good. Can Nordic or Carlos give any thoughts as to how this compares?
Thanks!
Ted
It is not very kind to do that to my dear old friend Michael Bittner
I also have cooperated a lot with him into the Symassym....and i like the amplifier a lot...say...the Symassym is a very respectable sound equipment.
I would say that a Symassym board, if amplifiers could think, analise and compare sounds.. i think, Symassym would look at the Precision 1 with a lot of respect.
Sound reproduction is a very complex thing...we cannot be simple just comparing and concluding this one is better and this one not...because depends on your speaker, your room acoustics, also the style of music will behave (result) different from amplifier to amplifier, there are the "jazz players amplifiers" and there are others.... very subjective things.
The amplifier that result better for YOU...cannot be the better for ME.
Also cultural things...for instance, Brasil has a mix of races..we are black and white..we are Europeans and Indians...we have Asiatic people in our blood too (millions of Japanese and Chinese here).... but for my group of race.... typical Yellow people, or ligth brown if you prefere, the black rithm is a need...for me, percursion, rithm and big bass is a need... so.... i have a tendence, i have a preference of rithm and bass...drum and bass sounds.... one amplifier will be better to me if reproduce better the bass and drums.
Japanese loves strings....their evaluation may be different too.... this is something i can write 100 pages...and to avoid that i will end here.
This is all i can say, here, and for a while.
regards,
Carlos
I also have cooperated a lot with him into the Symassym....and i like the amplifier a lot...say...the Symassym is a very respectable sound equipment.
I would say that a Symassym board, if amplifiers could think, analise and compare sounds.. i think, Symassym would look at the Precision 1 with a lot of respect.
Sound reproduction is a very complex thing...we cannot be simple just comparing and concluding this one is better and this one not...because depends on your speaker, your room acoustics, also the style of music will behave (result) different from amplifier to amplifier, there are the "jazz players amplifiers" and there are others.... very subjective things.
The amplifier that result better for YOU...cannot be the better for ME.
Also cultural things...for instance, Brasil has a mix of races..we are black and white..we are Europeans and Indians...we have Asiatic people in our blood too (millions of Japanese and Chinese here).... but for my group of race.... typical Yellow people, or ligth brown if you prefere, the black rithm is a need...for me, percursion, rithm and big bass is a need... so.... i have a tendence, i have a preference of rithm and bass...drum and bass sounds.... one amplifier will be better to me if reproduce better the bass and drums.
Japanese loves strings....their evaluation may be different too.... this is something i can write 100 pages...and to avoid that i will end here.
This is all i can say, here, and for a while.
regards,
Carlos
Attachments
Thanks you guys are fantastic, we allready hit the minimum of seven sets to make the groupbuy possible... lets see if we can get the numbers up a bit higher... 🙂
Matched transistors?
Hey guys, I'm looking forward to my second DIY amp build! The first was a pair of SKA 300D's. Now I will have two Hi-Fi amps for comparison.
I presume that this amp requires matched transistors... any thoughts on setting up a group buy for these components?
Ryan
Hey guys, I'm looking forward to my second DIY amp build! The first was a pair of SKA 300D's. Now I will have two Hi-Fi amps for comparison.
I presume that this amp requires matched transistors... any thoughts on setting up a group buy for these components?
Ryan
hi guys, what about mounting the transistors to the heatsink then connecting up with wires?
or will this degrade the sound?
thanks
or will this degrade the sound?
thanks
Wires around 2 inches long do not create problems, if separated one to the other will
be very good.
I have used this construction, and i could not see any problems into the amplifier performance during listening...i also have tested bigger length to check that and found another exagerated worry we see into many guy's minds.
Also i have tried twisted wires...no problems too.
But...to be carefull, it is better to avoid those things, or, at least, to make those wires as short as possible.
Going to the more standard ways to build amplifiers, we will be in a more safe area....no really needed to accept risks.
regards,
Carlos
be very good.
I have used this construction, and i could not see any problems into the amplifier performance during listening...i also have tested bigger length to check that and found another exagerated worry we see into many guy's minds.
Also i have tried twisted wires...no problems too.
But...to be carefull, it is better to avoid those things, or, at least, to make those wires as short as possible.
Going to the more standard ways to build amplifiers, we will be in a more safe area....no really needed to accept risks.
regards,
Carlos
Hi Ryan, carlos can correct me here, but appart from input stages, matching is not that critical... (emitter resistors makes sure that transistors share equal amount of the work...)
Regarding heatsinks:
Quite a few orders are comming form Australia.
You can get your sinks from Conrad Heatsinks.
The model recommended is the MF30-1F--75 for AUD28.94.
It is flanged so you will need no extra angle stock.
Dimensions
Height is 7.5cm.
http://conradheatsinks.com/products/single_f.html
Quite a few orders are comming form Australia.
You can get your sinks from Conrad Heatsinks.
The model recommended is the MF30-1F--75 for AUD28.94.
It is flanged so you will need no extra angle stock.
Dimensions
Height is 7.5cm.
http://conradheatsinks.com/products/single_f.html
Matched transistors are always very good.
But if you cannot....just match the differential and go ahead.
Accept that something may be lost into quality and go ahead.
This amplifier has a lot of room to have those mismatched..sounds so good that unit, that even loosing some, will continue to sound excelent.
regards,
Carlos
But if you cannot....just match the differential and go ahead.
Accept that something may be lost into quality and go ahead.
This amplifier has a lot of room to have those mismatched..sounds so good that unit, that even loosing some, will continue to sound excelent.
regards,
Carlos
Thanks Carlos... As a newbee, I don't know which are the differential transistors.
Nordic,
I assume that the 300mm heatsink is large enough to mount two channels on the one heatsink?
Nordic,
I assume that the 300mm heatsink is large enough to mount two channels on the one heatsink?
Good idea, when new into the area, to read entire forum
As there are all informations printed into threads.
In special the Dx amplifier thread.
Those informations and hundreds of others will be found there...including the differential.
To build without read those informs...even beeing very lucky you will have problems.
those amplifiers runs fine with newbie that use to read.
the ones that do not use to read will see smoke!... and will listen pops!, táhcs!...Puft! and pow!
regards,
Carlos
As there are all informations printed into threads.
In special the Dx amplifier thread.
Those informations and hundreds of others will be found there...including the differential.
To build without read those informs...even beeing very lucky you will have problems.
those amplifiers runs fine with newbie that use to read.
the ones that do not use to read will see smoke!... and will listen pops!, táhcs!...Puft! and pow!
regards,
Carlos
Hugh would be able to correct this one, but useing that sink and one channel even with that large channel will move the sink to about 68C with ambient in low 30's (hallo global warming)
Like Carlos said, the amp is very powerfull, its like a canon. No toy this one.
Like Carlos said, the amp is very powerfull, its like a canon. No toy this one.
Dx Precision is a "senior" amplifier.
The thunderstorm sound will not sound a mile away.
The thunder will enter your home!
Attention, this is not an amplifier to be built, or used, by non experienced people.
Attention: 64 plus 64 volts, even DC, can kill you!
the amplifier is not good to global warming.... full power, into 4 ohms, it will produce a lot of heat!
Do you have speaker repair shops in your country?
Do they repair a big speaker alike that by only 10 bucks?
This guy, into the image, loves deeply young folks building the Precision 1...ahahahaha...money to repair speakers will enter his pocket..... see his smile
Saying welcome to YOU!
regards,
Carlos
The thunderstorm sound will not sound a mile away.
The thunder will enter your home!
Attention, this is not an amplifier to be built, or used, by non experienced people.
Attention: 64 plus 64 volts, even DC, can kill you!
the amplifier is not good to global warming.... full power, into 4 ohms, it will produce a lot of heat!
Do you have speaker repair shops in your country?
Do they repair a big speaker alike that by only 10 bucks?
This guy, into the image, loves deeply young folks building the Precision 1...ahahahaha...money to repair speakers will enter his pocket..... see his smile
Saying welcome to YOU!
regards,
Carlos
Attachments
Dx Precision 1 can beat all the best brands of my country
And i am beeing very humble and kind not to say about other countries too.
I will let YOU to say that.
Will be waiting for that...smilling with confidence that i will listen that.
regards,
Carlos
And i am beeing very humble and kind not to say about other countries too.
I will let YOU to say that.
Will be waiting for that...smilling with confidence that i will listen that.
regards,
Carlos
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