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Sabaj A10h Review (Headphone Amplifier)
- Thread starter amirm
- Start date
Might be a good option as volume control-preamp of active monitors. For example JBL 30XP lineup. However I would like to see also option to switch between 2-3 sources.
Regarding the donation, just like to thank amir for his contribution and hope that the forum can continue to operate. And my sample was sent three months ago, and there is no any dodgy behavior. Thanks.
And Amir did not make any dishonest remarks. All are open and honest.
GeekyBastard
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If I remembered correctly, someone already pointed out that inside this thing is basically a copied (copy my homework but don't be too obvious) version of Topping L30, they even copied the old faulty protection circuit design, can you confirm that? @JohnYang1997
Edit: Ah, you liked my post, I think I understand what's happening now.
Edit: Ah, you liked my post, I think I understand what's happening now.
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D
Deleted member 32819
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It could be interpreted as dodgy, but if they know the site (and I'm pretty sure they do), then you'd think they'd be pretty familiar with @amirm and his insistence on transparency.
Walter
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Also sounds perfect for a Hypex MP502-based amp, which I believe needs 2.7V RMS input to reach max output.
restorer-john
Grand Contributor
restorer-john
Grand Contributor
Not so much a 'linear PSU' but a correctly earthed/grounded PSU. The 'issue' is so low as to not be a problem in any case. 4-5uV, even after 29dB of typical gain is buried in the noise floor.
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I thought about it but:
1) You add one more powered device in the chain.
2) Active monitors commonly have XLR or TLR input, so you'll lose the advantage of balanced connections to prevent ground loops.
nyxnyxnyx
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Excellent review! Whenever I have free bucks for audio I think I'll get this next.
I have one question though: Like sir Amir said, the regular voltage for RCA port is 2V, while based on what was written this amplifier can take up to 5V through RCA connection (and it seems to work best with that voltage too?). But then, how do I achieve 5V to feed this amp if my DAC only gives out 2V like most DACs do?
I have one question though: Like sir Amir said, the regular voltage for RCA port is 2V, while based on what was written this amplifier can take up to 5V through RCA connection (and it seems to work best with that voltage too?). But then, how do I achieve 5V to feed this amp if my DAC only gives out 2V like most DACs do?
audio_tony
Addicted to Fun and Learning
My definition of a ground loop is having two grounds (which technically are the same ground) with a potential difference between them.
For example - you might have device "A" connected to a socket directly on the wall, and device "B" connected to a trailing lead from an adjacent socket. Even at such short lengths, there will be a potential difference between the two grounds, resulting in a ground loop (where noise will be induced).
EDIT: For clarity - the 'loop' as mentioned by Amir is not a loop because there are no grounds involved. However, when he grounded the device, the noise dropped, because he provided a path for the current (not ground current) to drain away.
It's likely that if one touched the 'ground' of the headphone amp and touched a true ground, a small tingle would be felt, as you are now completing the path to ground for the mains leakage via the capacitor I mentioned in my previous post.
Here's a typical example - which fortunately had an earth - but in the event of an earth fault, you will get a nasty tingle from the chassis of the device, because C12 is charged to approx. 120vDC (in the case of 240vAC mains) - if an earth fault developed, there is nowhere for that charge to go, until some unfortunate person grabs an interconnect which is connected to an earthed amplifier for example, and touches the earth of this device - you then provide a path to ground for the 120vDC, and will continue to do so until you let go or the device is switched off.
The 300vDC in the schematic below is incorrect - it's about 120v DC. - there will also be an AC mains component riding on that...
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Alrighty then. I was never worried about it influencing Amir's review.
Curupira
Senior Member
Gamers prefer red led, blue is only there for looks, red adds FPS and improves the soundstage and imaging for precise sound cuing.
Blue light looks terrible and is hard on the eyes.
It is a HP amplifier!
Tatteredmidnight
Active Member
And there is a serious lack of affordable preamps, seeing the performance you can get at this price range in a HP amp makes this even more frustrating.
Sure, the more the better, but just one set will cover 95% of use cases out there which include a balanced DACs and keep the cost lower.
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