Discussion in 'Headphone Amplifiers and Combo (DAC/Amp) Units' started by Luckbad, Feb 28, 2016.
Last I heard there were concerns about the price it would have to be set at.
I received a quote from the eBay source mentioned about a power supply. Will one amp be adequate with the supercharger or is more capacity needed? Thanks again for that recommendation.
If you get 1 amp instead of 1.25, it will technically work, but...
Basically, with a 6N6P tube, you'll get more inrush current than that 1 amp can provide. Most likely, the amp will flicker on and off several times until it has heated up enough to stay on. This is what happened when I was using the stock supply from G1217. He sent me a beefier power supply and it never happened again.
With my bench supply, it can actually only provide 1.025 amps (not 1.25). It has a protection mechanism built in that basically drops the voltage and maxes out current. I have to flip the Horizon on, wait for about 10 seconds, then flip it off and on again to get it to settle in.
It only maintains 0.4-0.5 amps during normal operation, it's just the inrush of current to get the tube heated up that you need greater than 1 amp for.
So, the short version is: If you end up preferring the 6N6P tube, it's probably worth getting something closer to 48V/1.25A. Any other compatible tube doesn't require as much inrush and you can get by at something like 0.8A with a 12BH7 (this tube is perfectly content with my 1.025A and never even gets to 1A with it).
What's you guys favorite tube for the Sunrise? I'm planning to get this amp, and when I do, I'd like to just get one good tube and be done. I'm not looking for anything that changes the sound drastically, just a good all-around tube.
atomicbob and I both tend to like the new production Electro-Harmonix 12BH7 as an all-rounder, and I also like 6N6P tubes (I have some NOS tubes, but the new EH 6H30Pi are very good).
6N6P tube if you want a smooth (non-grainy), tonally somewhat warmer sound signature. I like that this tube mostly makes me forget that Sunrise III is a hybrid (not an all-tube amp) while not lacking in clarity I expect even from tube amps.
Sylvania 6CG7 if you still want to keep things smooth but prefer more neutralish sound signature. Also a very good choice. These tubes I have reserved for Valhalla2 though since they make the amp just so awesome!
(Ive also tried EH6922, GL ECC81, JJ E88CC and 6N1P)
Thanks guys. Does bypassing the input caps make a noticeable difference?
I've had my Sunrise for over a month now, it's a great little amp. Very good synergy with the HD 650. I ended up with a small collection of tubes, so far the Sylvania 6CG7 and EH 12BH7 are standouts. The 6CG7 has a warm, smooth sound. The 12BH7 is more neutral, but still smooth. I'm not sure what people have against new production tubes, but this particular one is very nice.
With both the Sunrise and Polaris, I've noticed that using the input attenuator seems to negatively affect sound quality. (In the Sunrise manual, they refer to it as adjustable input gain.) Anyway, music sounds compressed with attenuation on, so I keep it disabled.
So i got my Sunrise 3 a week ago, and the ON/OFF switch seems to have broken
Now the amp is running with the switch in either ON or OFF postition
Has anyone faced this before?
The switch is spring loaded and can be pressed into the housing a few mm. Please try pressing the switch inward (firmly) as you flip the position back and forth until the amp turns off.
This occurred with my Sunrise 3.1 after a few months, though I turn the unit on more often than what might be considered frequent use so I removed the power switch entirely. It's one less switch as I greatly prefer to use a linear PSU.
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