Hi Owen,
Simple question, how much power can I expect from the LPUHP on an 16 ohms driver ?
I guess enough as I planning to use them on TAD 2001s but I'm just curious and get also some questions from friends who might want to use them on slightly less effective drivers.
Cheers!
Simple question, how much power can I expect from the LPUHP on an 16 ohms driver ?
I guess enough as I planning to use them on TAD 2001s but I'm just curious and get also some questions from friends who might want to use them on slightly less effective drivers.
Cheers!
Hi Neofeed,
If you're running the "overvolt" version (which you should do if you plan to drive 16 ohms) then you will get ~12.5W into a 16 ohm load assuming 22V rails.
The normal 18V version will get you about 8 watts with a 16 ohm load.
Either way though, you'll be producing roughly 118db at 8W or 120dB at 12.5W with the TAD drivers, and that's more than enough even if you do like it loud!
Regards,
Owen
If you're running the "overvolt" version (which you should do if you plan to drive 16 ohms) then you will get ~12.5W into a 16 ohm load assuming 22V rails.
The normal 18V version will get you about 8 watts with a 16 ohm load.
Either way though, you'll be producing roughly 118db at 8W or 120dB at 12.5W with the TAD drivers, and that's more than enough even if you do like it loud!
Regards,
Owen
Hi Owen,
how do I order the LPUHP boards? Do you sell boards only or anything else, like the small heat sinks for the buffers?
how do I order the LPUHP boards? Do you sell boards only or anything else, like the small heat sinks for the buffers?
Need help troubleshoot
I just built it today and one channel works like a charm. The other channel has about -14Vdc at the output. I checked all the components and they seem to be in order. I checked the power supplies before assembling the amp and they were at +/- 18.2V. The channel that has a problem, when turned on I measured +18.2V and -17.4V. I am assuming that on the negative rail there is a much heavier load.
I would appreciate if anyone can help.
Thanks,
Radu
I just built it today and one channel works like a charm. The other channel has about -14Vdc at the output. I checked all the components and they seem to be in order. I checked the power supplies before assembling the amp and they were at +/- 18.2V. The channel that has a problem, when turned on I measured +18.2V and -17.4V. I am assuming that on the negative rail there is a much heavier load.
I would appreciate if anyone can help.
Thanks,
Radu
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That would do it! Glad you got it sorted without too much trouble.
Let me know what you think of them after you've had a little bit of time to give them a listen!
Regards,
Owen
No problem Owen. I just need to put everything together. I have a Modushop peasante enclosure and need to do some drilling. I am using two 100VA Antek 2x18V transformer...good power reserve.
I used a half brick heatsink but is only about 10mm tall and gets quite hot when tested over 6-7 W. I've seen some taller ones in your pictures. Do you know the part number?
Thanks,
Radu
I used a half brick heatsink but is only about 10mm tall and gets quite hot when tested over 6-7 W. I've seen some taller ones in your pictures. Do you know the part number?
Thanks,
Radu
Hi... Sorry for the noob question, can I put a led from the psu of the amp and how?
Enviado desde mi LG-E970 mediante Tapatalk
Enviado desde mi LG-E970 mediante Tapatalk
Just wondering, did anyone receive their LPUHP pcb's yet? I placed my order in November, sent multiple pm to OPC and no response.
Hi, I'd like to know with which parts could we replace the LME49600 and LME49990 ? With OPA211, OPA1642 ?
LPUHP still seems to be the perfect solution for tweeters in an active system 😛
LPUHP still seems to be the perfect solution for tweeters in an active system 😛
nothing
A word of warning: no boards arrived, no response from OPC, no refund. And this is for a payment that was made in November of 2015.
Just curious, anyone else with this issue?
A word of warning: no boards arrived, no response from OPC, no refund. And this is for a payment that was made in November of 2015.
Just curious, anyone else with this issue?
If anyone is looking for LME49610 for their LPUHP, or LME49870 to build the overclocked/higher-voltage LPUHP, we're running a group buy through next week on the discontinued chips: http://www.diyaudio.com/forums/group-buys/289006-gb-lme49610-discontinued-ti-audio-buffer.html
I am curious, is it possible to make this amp with a tube driver stage in place of the LME49990 opamp?
Yes the lme49610 is a buffer chip with a voltage gain of 1. You could put a tube in front of it and capacitor couple it to the chips. Why would you want more noise, more distortion more phase shift less bandwidth etc. If you want tube sound build a tube power amp.
I am planning to build the original design, of course, just curious about the tube driver. If I try LME49870 for higher output, will I need more than 15v transformer secondaries? Recommend doing this? My tweeters are 109db/watt, 12ohm...
Also, any decent enclosure recommendations for either monoblocks or stereo amp?
thanks.
Herman
Also, any decent enclosure recommendations for either monoblocks or stereo amp?
thanks.
Herman