Hi,
I've no doubt you're right, we're talking about percentages of pennies, but you gotta draw the line somewhere. So I decided to post that before we start talking about gold solder joints and the like. My priorities aren't cosmetics.
I still can't help but wonder how much less they'd be for just a plain jane heatsink though. How about that blue LED? They're a fair bit more costly than a regular red or green one too. Could always upgrade that to lazer that spells out UCD on the ceiling..track titles and running time, oscillation frequency, THD and FFT. There's a good reason for building a clear case, otherwise the most you can do is say look, it's blue.
Was it the tact millenium, all the reviewers were ranting about how good that gold plated volume knob looked, I wonder how many of them cut a check for one.
Anyway, for now we're still talking pennies, won't stop me from getting one.
ghemink, looking forward to your testing results. I trust that posted protection circuitry is already included in your module? I haven't studied it much either but I guess that's also your short circuit protection.
I've no doubt you're right, we're talking about percentages of pennies, but you gotta draw the line somewhere. So I decided to post that before we start talking about gold solder joints and the like. My priorities aren't cosmetics.
I still can't help but wonder how much less they'd be for just a plain jane heatsink though. How about that blue LED? They're a fair bit more costly than a regular red or green one too. Could always upgrade that to lazer that spells out UCD on the ceiling..track titles and running time, oscillation frequency, THD and FFT. There's a good reason for building a clear case, otherwise the most you can do is say look, it's blue.
Was it the tact millenium, all the reviewers were ranting about how good that gold plated volume knob looked, I wonder how many of them cut a check for one.
Anyway, for now we're still talking pennies, won't stop me from getting one.
ghemink, looking forward to your testing results. I trust that posted protection circuitry is already included in your module? I haven't studied it much either but I guess that's also your short circuit protection.
Hi,
The price increase a few Euros (dollars) because of the blue colour. I think it's nice to receive somthings what not only functions ok but also looks ok.
IVX,
Indeed we will come with more powerfull UcDs. First will be introduced the 400W version, after that we will come with a 700 - 1000W version. A super UcD High End version is currently unther development by Bruno. But this is somewhat secret OEM project so we can't share you with more information.
Regards,
Jan-Peter
www.hypex.nl
The price increase a few Euros (dollars) because of the blue colour. I think it's nice to receive somthings what not only functions ok but also looks ok.
IVX,
Indeed we will come with more powerfull UcDs. First will be introduced the 400W version, after that we will come with a 700 - 1000W version. A super UcD High End version is currently unther development by Bruno. But this is somewhat secret OEM project so we can't share you with more information.
Regards,
Jan-Peter
www.hypex.nl
Very, very nice!
Are you as of yet able to give anymore information about your 400 watt version? How will it differ from the 180w? We know it has a different driver, possibly second integrator loop, is it full bridge, does it use the same input stage and comparator? Can you comment on the performance of it into a 4 ohm load?
Thanks,
Chris
Chris,
The difference of the UcD400 with the UcD180 is not so much. Only more powerfull Fets and output coil. It's still no Full-Bridge ;-)
We use the same Modulator PCB!
A measurement in 4 Ohm at 1kHz.
Regards,
Jan-Peter
www.hypex.nl
The difference of the UcD400 with the UcD180 is not so much. Only more powerfull Fets and output coil. It's still no Full-Bridge ;-)
We use the same Modulator PCB!
A measurement in 4 Ohm at 1kHz.
Regards,
Jan-Peter
www.hypex.nl
Attachments
UCD180 modules
Hi Bruno / Jan-Peter
Any chance of you showing the 7.2kHz FFT of THD + noise for the UCD180 that John W showed for his amp on one of the other threads. I believe that it was about 100Watts into 4 Ohms.
This would be much more useful than another meaningless THD_N vs frequency plot which tells you nothing at all!
Or alternatively, an AP FFT plot of the UCD180 doing 19&20kHz @ 100W into 4Ohms. These would tell a much more useful story about the performance of the amplifier.
FuriousD
Hi Bruno / Jan-Peter
Any chance of you showing the 7.2kHz FFT of THD + noise for the UCD180 that John W showed for his amp on one of the other threads. I believe that it was about 100Watts into 4 Ohms.
This would be much more useful than another meaningless THD_N vs frequency plot which tells you nothing at all!
Or alternatively, an AP FFT plot of the UCD180 doing 19&20kHz @ 100W into 4Ohms. These would tell a much more useful story about the performance of the amplifier.
FuriousD
Jan-Peter said:Hi,
The price increase a few Euros (dollars) because of the blue colour. I think it's nice to receive somthings what not only functions ok but also looks ok.
IVX,
Indeed we will come with more powerfull UcDs. First will be introduced the 400W version, after that we will come with a 700 - 1000W version. A super UcD High End version is currently unther development by Bruno. But this is somewhat secret OEM project so we can't share you with more information.
Regards,
Jan-Peter
www.hypex.nl
Hi Jan-Peter,
Will that super UCD high end version become available for us as well? If we know something better is out there we may want to have it.
When can we expect that 700-1000W version? I need brute force for my dipole woofers. Probably I could also blow the main fuses in my house with that kind of power. Here in Japan we have only 100V available. :-(
Best regards
Gertjan
Jan-Peter said:
Hi Jan-Peter,
When comparing the schematics of input.gif that you posted earlier with this one, it seems I only have to add the lower part. The part with the two zener diodes, two transistors and a couple of resistors. The the u-prot signal can just go to the u-prot signal of the UCD module. Correct?
Best regards
Gertjan
7.2kHz would give you second and third harmonic within the measurement bandwidth of the FFT of an Audio P system one or better. (about 22kHz for the system one, and about 24kHz for the system two) and also gives you two harmonics within the audio band!
This gives you even and odd harmonics. Since different feedback systems usually result in very different harmonic perfomances for odd and even, and these usually become worse with frequency, this is the most extreme single frequency FFT test that most designers can do to their amplifier. It is extremely revealing!
It gives a good indication of noise floor (something that the THD_N plot does not).
It is so infuriating to see THD+N plots as you could have fantastic THD in the amplifier, and the designer could be the worst PSU designer in the world and the THD+N plot would rate the amplifier as bad. The THD+N does not tell you anything meaningful at all. I do not know why people bother to show them.
D.
rha61 said:Hi
I've received my UCD180
With a normal power supply , un-balanced input and passive preamp with an insuitable impedance , it already sounds very well , fluid and accurate , no need for burnin
Bravo to Bruno and Jan-Peter !
Al
Hi RHA61,
Glad to hear this. I have not done much listening yet. Have you compared it with other Class D amps?
Best regards
Gertjan
Hi FuriosD,
Hereby a mesauring of the UcD in 100W 4 Ohm and a very known other Class-D amplifier. The lower one is the UcD
FuriosD, what a name. Where are you so furio(u)s about?
Gertjan,
At the end of this year will be the third version out of the UcDxxx serie available. It will be a 700 - 900W version (1000W?).
A Super High End version? Perhaps, you never know
We have just started with this UcD Class-D serie................
Yesterday we have tested 2x UcD400 in bridged mode, as expexcted more of less 800W in 4 Ohm. No performing measurements result yet, it was only to see if everything was stable and works. Now I can tell, it works!
A modification on the UcD180 to have a overvoltage protection is indeed very simple, only two resistors and two zeners extra. Anybody who is interested for the modification, please send me a direct email to info@hypex.nl.
Regards,
Jan-Peter
www.hypex.nl
Hereby a mesauring of the UcD in 100W 4 Ohm and a very known other Class-D amplifier. The lower one is the UcD
FuriosD, what a name. Where are you so furio(u)s about?
Gertjan,
At the end of this year will be the third version out of the UcDxxx serie available. It will be a 700 - 900W version (1000W?).
A Super High End version? Perhaps, you never know
We have just started with this UcD Class-D serie................
Yesterday we have tested 2x UcD400 in bridged mode, as expexcted more of less 800W in 4 Ohm. No performing measurements result yet, it was only to see if everything was stable and works. Now I can tell, it works!
A modification on the UcD180 to have a overvoltage protection is indeed very simple, only two resistors and two zeners extra. Anybody who is interested for the modification, please send me a direct email to info@hypex.nl.
Regards,
Jan-Peter
www.hypex.nl
Attachments
Hi patst577 and ghemink
I've corrected the UCD impedance to match with my passive preamp
what is surprising first is that the sound is not digital at all
Compared to my modified Panasonic saxr45 (TI equibit ) :
it seems to have no distorsion , very linear and a deep large and accurate presentation
The Panny has faster bass and faster presentation , but i think that changing the Ne5532 can cure that
in fact , my impression is that i 'm listening to the NE5532 and the coupling cap ( quiet and accurate , very natural )
I will try a R-core transformer and an AD826 next week
Regards
Allain
I've corrected the UCD impedance to match with my passive preamp
what is surprising first is that the sound is not digital at all
Compared to my modified Panasonic saxr45 (TI equibit ) :
it seems to have no distorsion , very linear and a deep large and accurate presentation
The Panny has faster bass and faster presentation , but i think that changing the Ne5532 can cure that
in fact , my impression is that i 'm listening to the NE5532 and the coupling cap ( quiet and accurate , very natural )
I will try a R-core transformer and an AD826 next week
Regards
Allain
Jan-Peter said:Hi FuriosD,
Hereby a mesauring of the UcD in 100W 4 Ohm and a very known other Class-D amplifier. The lower one is the UcD
FuriosD, what a name. Where are you so furio(u)s about?
Gertjan,
At the end of this year will be the third version out of the UcDxxx serie available. It will be a 700 - 900W version (1000W?).
A Super High End version? Perhaps, you never know
We have just started with this UcD Class-D serie................
Yesterday we have tested 2x UcD400 in bridged mode, as expexcted more of less 800W in 4 Ohm. No performing measurements result yet, it was only to see if everything was stable and works. Now I can tell, it works!
A modification on the UcD180 to have a overvoltage protection is indeed very simple, only two resistors and two zeners extra. Anybody who is interested for the modification, please send me a direct email to info@hypex.nl.
Regards,
Jan-Peter
www.hypex.nl
Hi Jan-Peter,
So the filter coil of the UCD400 can handle that 800Watt? If you bridge it with a 4 Ohm speaker each module sees a 2 Ohm load, that means a lot of current going through that filter coil. For what power is the filter coil specified? For the UCD180 it says 180W on the coil, so bridging it with a 4 Ohm load could be too ,uch for that coil. Is the one in the UCD400 bigger?
What about the 700-900W version, will it be bridged?
I`m interested in the modification for the overvoltage protection. Can the modification be done by myself or do I need to send the modules back?
Best regards
Gertjan
Gertjan,
The filtercoil of the UcD400 can handle 15A rms. So in 2 Ohm load you wil have maximum 450W. Indeed the coil of the UcD400 is bigger.
...hm indeed I did not yet had some thougts about to bridge 2 UcD 700 (900). But theoretically this is true, we can go to really high power levels in future .
The modification is quit simple, when you can solder good it will be not such a problem. You don't have to cut any traces only to solder 4 wires.
Regards,
Jan-Peter
www.hypex.nl
The filtercoil of the UcD400 can handle 15A rms. So in 2 Ohm load you wil have maximum 450W. Indeed the coil of the UcD400 is bigger.
...hm indeed I did not yet had some thougts about to bridge 2 UcD 700 (900). But theoretically this is true, we can go to really high power levels in future
.The modification is quit simple, when you can solder good it will be not such a problem. You don't have to cut any traces only to solder 4 wires.
Regards,
Jan-Peter
www.hypex.nl
Jan-Peter said:Gertjan,
The filtercoil of the UcD400 can handle 15A rms. So in 2 Ohm load you wil have maximum 450W. Indeed the coil of the UcD400 is bigger.
...hm indeed I did not yet had some thougts about to bridge 2 UcD 700 (900). But theoretically this is true, we can go to really high power levels in future
The modification is quit simple, when you can solder good it will be not such a problem. You don't have to cut any traces only to solder 4 wires.
Regards,
Jan-Peter
www.hypex.nl
Hi Jan-Peter,
I was not thinking about bridging the UCD700, I thought maybe that amp would be a H-bridge configuration in itself. Something like two UCD400 power stages attached to the same UCD driving electronics.
Best regards
Gertjan
Gertjan,
The UcD700 (900) is still a half-bridge Class-D amplifier
Maximum voltage of the powersupply will be +90VDC / -90VDC
At the moment we are doing a custom made design, this version will be with Fet drivers and some extra transistors and with a H-bridge output. No plans to put this in some moduleform, there are already modules available with a H-bridge
Already done some further testings soundwise spoken?
Regards,
Jan-Peter
www.hypex.nl
The UcD700 (900) is still a half-bridge Class-D amplifier
Maximum voltage of the powersupply will be +90VDC / -90VDC
At the moment we are doing a custom made design, this version will be with Fet drivers and some extra transistors and with a H-bridge output. No plans to put this in some moduleform, there are already modules available with a H-bridge
Already done some further testings soundwise spoken?
Regards,
Jan-Peter
www.hypex.nl
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