If that is so why so many peoples are buying the material (group buy, ...) to build this project
Fab
The measurements look good, and it looks to be a compact yet powerful amp.
all of the above, the design is clean and compact with extensive measurements (not just THD either) to back it up. Owen has gained a reputation for very high performance designs using quality parts and solid engineering principles; there are enough of us here who have built his headphone amps and other projects to trust and know that these numbers also reflect in the sound.
I just build whatever qusp is ...
I reject your high powered amp and all its switching trimmings
On a more serious note, what speakers are you going to use these with?
AP2 we are all busying ourselves with building I guess. casework is not my strong point, at least I have heatsinks and a front panel haha. need to get an alloy plate for the dps600 for initial testing, I had neglected to arrange this as will use the floor of the case, but dont have a floor for the case yet ha
@AP2 I am working on some other peripheral devices for mine at the moment (lm335 heatsink temp sensor), I've got no fets here at the moment and no speakers ready for them so not in a hurry, in the next week or so I'm hoping to have some remote on/off control and maybe some initial testing of the power supplies though
@nattonrice, initially I'll use them with some B&W standmount speakers, eventually they'll drive the woofer in zaph ZRT in 20L sealed enclosures. Already got a pair of subs built and working nicely from a different smps powered class ab amp (6ch amp by aussie amps a forum sponsor) so I have already sampled smps power supplies in those amps ... no toroids here! [except for the teeny tiny lpuhp ones]
@nattonrice, initially I'll use them with some B&W standmount speakers, eventually they'll drive the woofer in zaph ZRT in 20L sealed enclosures. Already got a pair of subs built and working nicely from a different smps powered class ab amp (6ch amp by aussie amps a forum sponsor) so I have already sampled smps power supplies in those amps ... no toroids here!
[except for the teeny tiny lpuhp ones]
Hi, I hope Nicmac and Kiwi, confirm the receipt of the package.
Arthur: there are only your DPS-600, are stopped for lack of stupid caps 1206. Distrelec not send me (the rest of the 100 not available) so I'm looking to buy today from another supplier. I solve this today, Many apologies for this arthur.
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Since I received some pm for DPS-500 (for new wire-amp), I will discuss (in DPS-600 threads), some aspects. they are ready because they have been assembled from services, so they need only the power unit and the final test. I mean, can be shipped in a couple of days. (I will not repeat the folly of the first GB, I worked on it for 5 weeks)
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Regards
Arthur: there are only your DPS-600, are stopped for lack of stupid caps 1206. Distrelec not send me (the rest of the 100 not available) so I'm looking to buy today from another supplier. I solve this today, Many apologies for this arthur.
-----------------------------------------------
Since I received some pm for DPS-500 (for new wire-amp), I will discuss (in DPS-600 threads), some aspects. they are ready because they have been assembled from services, so they need only the power unit and the final test. I mean, can be shipped in a couple of days. (I will not repeat the folly of the first GB, I worked on it for 5 weeks)
----------------------------------------------
Regards
I was supposed to get a pair for testing, but I think it fell through.
I would still be interested, as I'm back to using linear supplies and would really like to build these into smaller finished chassis if possible.
AP2:
Can you send me an email about this? I've got a little bit of spare time where I could test these.
Regards,
Owen
I would still be interested, as I'm back to using linear supplies and would really like to build these into smaller finished chassis if possible.
AP2:
Can you send me an email about this? I've got a little bit of spare time where I could test these.
Regards,
Owen
LME Gain
@opc, or anyone who might know...
I've populated the pcb's using the guide and stock values from the BOM & will be using +/-55V/45V dps-600's... do we need to alter the Gain to reflect the +/- rails and source V's?
Only built headphone amps so far, so am unsure if Gain is used/adjusted in the same way on this as it would on a head-amp!?
Regards
Paul.
@opc, or anyone who might know...
I've populated the pcb's using the guide and stock values from the BOM & will be using +/-55V/45V dps-600's... do we need to alter the Gain to reflect the +/- rails and source V's?
Only built headphone amps so far, so am unsure if Gain is used/adjusted in the same way on this as it would on a head-amp!?
Regards
Paul.
Hi Paul,
I would suggest leaving the gain as it is. Going lower may cause instability, and you would only really need to go higher if you had a source with very low output capabilities and you could not get the overall level to where you needed it with your finished system.
If this is your first power amp build, I would definitely start off with everything as standard as possible, and later evaluate if you really need to increase the gain.
The voltage used on the PSU doesn't really impact what gain setting you should use until you start getting into very high voltages. If you want to run +/- 100V rails to get some 500W into 8 ohms, then you would likely need more gain to allow you to swing more voltage on the output. In that case, if you only had about 1VRMS drive from your preamp, you might want to consider increasing the gain a little to get the desired output.
Cheers,
Owen
I would suggest leaving the gain as it is. Going lower may cause instability, and you would only really need to go higher if you had a source with very low output capabilities and you could not get the overall level to where you needed it with your finished system.
If this is your first power amp build, I would definitely start off with everything as standard as possible, and later evaluate if you really need to increase the gain.
The voltage used on the PSU doesn't really impact what gain setting you should use until you start getting into very high voltages. If you want to run +/- 100V rails to get some 500W into 8 ohms, then you would likely need more gain to allow you to swing more voltage on the output. In that case, if you only had about 1VRMS drive from your preamp, you might want to consider increasing the gain a little to get the desired output.
Cheers,
Owen