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Quote:
Originally Posted by Ajani
Hmmm, seems connexelectronic recommends their switching amp over the linear one:
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http://connexelectronic.com/product_...roducts_id/110
That should be a lot shorter and allow for a smaller chassis...
Also, I'm not sure if the linear supply needs a transformer...
The funny thing is that they have this product, which has the amp and switching power supply together in one module... so all that is missing is the BIPS (inputs) and it would have been a complete plug and play amp...
http://connexelectronic.com/product_...roducts_id/119
Kind of weird that they have one amp module with inputs but no power supply and another with power supply but no inputs... When's the all in one due out?
I don't think the SMPS requires a separate transformer. There is degree of prejudice agains switching mode supplies; pundits generally recommend linear supplies. I don't personally have a position, but I did go linear in the case of the Class-D-Audio, though there is an SMPS available.
If you have space constraints the V4 looks pretty attactive. Say, Ajani, why not buy one let us know? :3: At the very least it would make a great sub amp: 1340W on 4 Ohms in bridged mode Wow!
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Quote:
Originally Posted by Feanor
I don't think the SMPS requires a separate transformer. There is degree of prejudice agains switching mode supplies; pundits generally recommend linear supplies. I don't personally have a position, but I did go linear in the case of the Class-D-Audio, though there is an SMPS available.
If you have space constraints the V4 looks pretty attactive. Say, Ajani, why not buy one let us know? :3: At the very least it would make a great sub amp: 1340W on 4 Ohms in bridged mode Wow!
The SMPS doesn't need a transformer (it has one built in, if I'm not mistaken)... But I think the Linear power supply may need one... Also, it seems you can just use the amp module you suggested (TA3020 v3d) direct with a transformer and no additional linear power supply. According to the manual, you can use it direct with a transformer, with an external linear power supply or with a SMPS:
http://www.connexelectronic.com/docu...Module_v3c.pdf
However, while they list the benefit of using the SMPS, they don't mention the benefit of using a linear PS...
Eventually I'll just have to bite the bullet and go for either one of these models or something from Class D...
Though I'd be really happy if Chris would release version 5 or E or whatever with the SMPS, Amp and BIPS all on one board... It seems the most obvious step for really lazy persons like myself or persons who want the amp to be as small as possible... just screw in the power cord and that's it...
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Quote:
Originally Posted by Ajani
The SMPS doesn't need a transformer (it has one built in, if I'm not mistaken)... But I think the Linear power supply may need one... Also, it seems you can just use the amp module you suggested (TA3020 v3d) direct with a transformer and no additional linear power supply. According to the manual, you can use it direct with a transformer, with an external linear power supply or with a SMPS:
http://www.connexelectronic.com/docu...Module_v3c.pdf
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I see you're right about the v3d. It has its own built-in power supply and requires only a transformer.
Looking at the schematic in the v3d documentation, above, it cleary has its own bridge rectifier and hence can be powered directly by the AC from a transformer; (they specify +/- 30 to 42 VAC). Filtering is provided by the pair of 10,000 uF capacitors that are obvious in the pictures. However they mention that an external linear PS can be used but "the rectifier bridge from the board must be bypassed". They almost seem to recommend this since larger capcitors will reduce "bus pumping".
OK, so if you do wanted to use an external power supply, (linear or switching mode), looks like you would be better off buying the v3b, (here), that doesn't have it's own bridge rectifier. Of course the v3b doesn't have integrated XLR connectors and, in fact, it doesn't support balance input at all.
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Quote:
Originally Posted by Feanor
I see you're right about the v3d. It has its own built-in power supply and requires only a transformer.
Looking at the schematic in the v3d documentation, above, it clearl has its own bridge rectifier and hence can be powered directly by the AC from a transformer; (they specify +/- 30 to 42 VAC). Filtering is provided by the pair of 10,000 uF capacitors that are obvious in the pictures. However they mention that an external linear PS can be used but "the rectifier bridge from the board must be bypass". They almost seem to recommend this since larger capcitors will reduce "bus pumping".
They also have the option to upgrade those capacitors to a pair of the same 18000 uF 71V in the power supply you're considering... Though of course the power supply has 6 of those capacitors rather than just the pair on the amp board...
I suppose an advantage is that someone could always start small and just buy the amp and transformer, but later on add an external linear power supply...
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OK, I think I've decided on this combo:
TA3020 v3d (Tripath) amp, (here),
combined with their SMPS800R power supply, (here).
http://connexelectronic.com/images/TA3020v3d.JPG
http://connexelectronic.com/images/SMPS800R.JPG
Both use the same size board. All the inputs are on the amp board and the Mains IEC Power Connector is on the power supply, so I wouldn't need to do any soldering or crimping at all, even when I eventually build a case...
Also they should be able to fit in a 1RU case the size of my DAC1, which would be ideal...
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Quote:
Originally Posted by Ajani
OK, I think I've decided on this combo:
TA3020 v3d (Tripath) amp, ( here),
combined with their SMPS800R power supply, ( here).
....
Both use the same size board. All the inputs are on the amp board and the Mains IEC Power Connector is on the power supply, so I wouldn't need to do any soldering or crimping at all, even when I eventually build a case...
Also they should be able to fit in a 1RU case the size of my DAC1, which would be ideal...
Hey, great, Ajani. That is an appealing combination, (especially considering your solderphobia).
I'll be interested to hear how SMPS is connected to the v3d. I don't understand whether or how you must by pass the rectifier on the amp (or PS as the case might be). I'd email Connexelectronics or ask the question on forum where the Connexe. operator hangs out -- I forget which one that is, though.
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Quote:
Originally Posted by Feanor
Hey, great, Ajani. That is an appealing combination, (especially considering your solderphobia).
I'll be interested to hear how SMPS is connected to the v3d. I don't understand whether or how you must by pass the rectifier on the amp (or PS as the case might be). I'd email Connexelectronics or ask the question on forum where the Connexe. operator hangs out -- I forget which one that is, though.
I already PMed Cristi (Connexe) at diyAudio and he says he will have a manual out shortly, showing how to bypass the rectifier... Also that if I order those 2 components at the same time, he'll bypass it for me....
At approx. $243 (including $9 for upgraded MOS-FET's), it looks to be the ticket... The only thing I'm considering is whether to opt for the cooling fan ($4)....
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If you ever consider putting it in a case I'd get the fan. My little Sure Tripath makes more heat than I realized and it's fan silently cycles on and off. Now if I play it with the top cover off the fan never comes on.
Great looking combo. Hope you pull the trigger soon!
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Quote:
Originally Posted by Poultrygeist
If you ever consider putting it in a case I'd get the fan. My little Sure Tripath makes more heat than I realized and it's fan silently cycles on and off. Now if I play it with the top cover off the fan never comes on.
Great looking combo. Hope you pull the trigger soon!
Thanks! I'll definitely get the fan...
Not sure how soon I'm going to pull the trigger, as I need to buy my Audio Nirvana drivers as well...
I keep thinking how sweet it would be to use a pair of these little amps to make some active, open baffle speakers with the AN drivers...
Whether I just make an amp to match the dimensions of my DAC1 or make active speakers, it should be fun to hear how it all sounds...
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