huh? no wonder then that some folks actually like my small tube preamp....
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thanks, i build these tube preamps on plastic cases for use in combo with
my SS power amps, i never expected that they turned out as quiet as they did...
I've just finished assembling a second complete nx-Amp - these are the boards I bought from Jim's Audio on ebay.
The front end diamond buffer resistors on this build, on my original nx-amp build and on my sx-amp have all been increased to 150 Ohms/110 Ohms as detailed in the errata sheet under the nx-Amp build document on my website (NB 120 Ohms instead of 110 Ohms works just as well BTW).
On both nx-amp builds, the PSU +Protect boards have been modded per Bill_P's suggestion (thanks for that Bill!) and work flawlessly.
I've been playing Jack Johnson 'In Between Dreams' (nice crisp recording with fantastic bass and recording space, Paul Simon 'Rhythm of the Saints' which has some incredible, spacey percussion and now playing Diana Krall 'Quiet Nights' - always great recordings with feathery strings.
Both Amps biased up for 320mA total supply current - so OPS sitting at about 130-140mA each (yes, about 100mA more than Doug would recommend).
I am extremely pleased with the result - great bass and mid with very clean an open high end.
The front end diamond buffer resistors on this build, on my original nx-amp build and on my sx-amp have all been increased to 150 Ohms/110 Ohms as detailed in the errata sheet under the nx-Amp build document on my website (NB 120 Ohms instead of 110 Ohms works just as well BTW).
On both nx-amp builds, the PSU +Protect boards have been modded per Bill_P's suggestion (thanks for that Bill!) and work flawlessly.
I've been playing Jack Johnson 'In Between Dreams' (nice crisp recording with fantastic bass and recording space, Paul Simon 'Rhythm of the Saints' which has some incredible, spacey percussion and now playing Diana Krall 'Quiet Nights' - always great recordings with feathery strings.
Both Amps biased up for 320mA total supply current - so OPS sitting at about 130-140mA each (yes, about 100mA more than Doug would recommend).
I am extremely pleased with the result - great bass and mid with very clean an open high end.
Attachments
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Coming soon: Ultra High Fiendly audio power amplifier dual mono ( 4 windings on one transformer)
15W at 8 ohms and 30 at 4ohms...
Case dimensions: 260x190x50mm
15W at 8 ohms and 30 at 4ohms...
An externally hosted image should be here but it was not working when we last tested it.
Case dimensions: 260x190x50mm
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I've just finished assembling a second complete nx-Amp - these are the boards I bought from Jim's Audio on ebay.
The front end diamond buffer resistors on this build, on my original nx-amp build and on my sx-amp have all been increased to 150 Ohms/110 Ohms as detailed in the errata sheet under the nx-Amp build document on my website (NB 120 Ohms instead of 110 Ohms works just as well BTW).
On both nx-amp builds, the PSU +Protect boards have been modded per Bill_P's suggestion (thanks for that Bill!) and work flawlessly.
I've been playing Jack Johnson 'In Between Dreams' (nice crisp recording with fantastic bass and recording space, Paul Simon 'Rhythm of the Saints' which has some incredible, spacey percussion and now playing Diana Krall 'Quiet Nights' - always great recordings with feathery strings.
Both Amps biased up for 320mA total supply current - so OPS sitting at about 130-140mA each (yes, about 100mA more than Doug would recommend).
I am extremely pleased with the result - great bass and mid with very clean an open high end.
Hi Bonsai,
Could you PM me the link to where the PSU modif is and the modding you are talking about on the amps boards?
Thanks
Do
Thank you!
I just completed the bench testing and burn-in on the second amplifier last night. I was able to move them into my listening room and have a brief listen. So far I am quite pleased. I may have to tweek on the AC current gain a bit to see what the results are, but overall very good sounding.
