Custom CNC binding post plates for the LSA Sig 80. Paired with Viborg binding posts, the look is great and the fit and feel is solid. These are not the same posts for production but same construction and diameter.
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I finally built the P2P crossover for the new LSA Signature 80 speakers. First listen to them and they sound amazing. Recorded with iPhone 12 Pro Max. Amazon Music HD playing through Behringer UM2 DAC and Emerald Physics 600.2SE amp. Mono speaker.
LSA Signature 80 Reference Monitor first sound - YouTube
Predicted crossover:
LSA Signature 80 Reference Monitor first sound - YouTube
Predicted crossover:
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So much stuff being build with power jfet lu1014, so i put together little headphone amp. It can drive bookshelf a little as well. No measurements yet, but it sounds good.
Hi Adason,
Nice work! You can drive HE400i’s with that?
I made a headphone amp years ago with LU1014D but with a JFET input stage for some gain. It sounded great.
yes, it can drive 50 ohm planars to deafening spl from half of line level
it can even drive small bookshelf (not too loud though)
if someone needs more power, lowering the resistors and increasing power supply is the way to go, but for me this is plenty for headphones
I have seen your design, its different, yours is follower
mine is work in progress, there is still small hum, that's why I made no measurements yet
it needs better supply, regulated, likely because it has poor psrr
it should not be a problem, it only draws 0.1A per channel
it can even drive small bookshelf (not too loud though)
if someone needs more power, lowering the resistors and increasing power supply is the way to go, but for me this is plenty for headphones
I have seen your design, its different, yours is follower
mine is work in progress, there is still small hum, that's why I made no measurements yet
it needs better supply, regulated, likely because it has poor psrr
it should not be a problem, it only draws 0.1A per channel
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Nice harmonic profile. Almost all SE Class A headphone amps will have this very pleasing g profile. It’s true that there is no PSRR so a very quiet PSU is needed. What I have found that works well is either a battery (LiPo driving DCDC boost), or a wall wart driving a DCDC boost followed by a cap multiplier. If you add an ultra low noise TPS7A4XXX regulator after that, it’s about as quiet as a battery.
There is a board in my shop that provides CLC / Cap Mx / low noise VR:
Simple Cap Mx Regulated Power Supply | Etsy
Easy enough to P2P if you don’t need a neat PCB.
There is a board in my shop that provides CLC / Cap Mx / low noise VR:
Simple Cap Mx Regulated Power Supply | Etsy
Easy enough to P2P if you don’t need a neat PCB.
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I reduced 47ohm resistors to 22, just for fun, now it can drive small bookshelf to normal level. When i used betsy with ribbon, half of volume pot filled the room.
Resistors and jfet little warm, but not hot.
Plus it can rapture your eardrums with any headphones now.
Otherwise it sounds wonderfull.
Resistors and jfet little warm, but not hot.
Plus it can rapture your eardrums with any headphones now.
Otherwise it sounds wonderfull.