Jave
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- Apr 1, 2016
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Will @amirm or @WolfX-700 measure the new 2.5 version? (Including multitone and THD+N vs freq)
I have no idea what this shit mean. What's the secret sauce and why isn't everybody doing it to achieve almost distortion-free results?
...
I would use 10kA potmeter (RK271)...
i agree but i literally don't think a blue velvet would fit on the board. the rk16 they used is nothing to sneeze at, and it's nice to see something other than an rk09.lower noise, lower immunity to pick up stray RF and the RK271 choice is obvious.
A bit pricier than the original pot., only 21 volume levels is not enough, the inside 21 contacts will break faster than the carbon ribbon of a regular pot.Instead of the built-in attenuator, you can use this one:
https://www.ebay.com/itm/DACT-Type-...ontrol-100K-Replace-Accessories-/274146774142
If we consider a universal attenuator for a headphone amplifier, then you can use this:A bit pricier than the original pot., only 21 volume levels is not enough, the inside 21 contacts will break faster than the carbon ribbon of a regular pot.
That depends on how low you were talking about. Atom level or THX level. It's truly different. There are a lot more to consider if you want -130db harmonics with high gain with low impedance load with unbalanced input and perhaps with balanced output (which is more difficult to achieve same performance than unbalanced out).Secret source for low distortion amps:
Choosing low distortion components (the right opamps).
Using the correct circuit and above all layout of the feedback path and decoupling.
High enough voltage rails.
Filtering those voltage rails.
Ensuring enough current can be available (selection of output devices and power supply)
Galvanic separation of audiopath, power supply and control circuit could also help.
All of the above is applied in this amp.
I don't know if they improved the low frequency noise in this version but could also be achieved by component choices but would have financial consequences.
I would use 10kA potmeter (RK271) but would add another $ 20.
It's just proper engineering. No special 'audio components' need to be used (other than suitable opamps) to get a good performing amp.
Obviously we don't know whether or not the magic unknown to us (yet) signal also passes through this device.
It would need to be tested by special ears for this.
Alas, according to those people, these folks are not among ASR members so would have to wait to hear from the 'better hearing' forums for that aspect. It is not expensive enough though...
Secret source for low distortion amps:
Choosing low distortion components (the right opamps).
Using the correct circuit and above all layout of the feedback path and decoupling.
High enough voltage rails.
Filtering those voltage rails.
Ensuring enough current can be available (selection of output devices and power supply)
Galvanic separation of audiopath, power supply and control circuit could also help.
All of the above is applied in this amp.
I don't know if they improved the low frequency noise in this version but could also be achieved by component choices but would have financial consequences.
I would use 10kA potmeter (RK271) but would add another $ 20.
It's just proper engineering. No special 'audio components' need to be used (other than suitable opamps) to get a good performing amp.
Obviously we don't know whether or not the magic unknown to us (yet) signal also passes through this device.
It would need to be tested by special ears for this.
Alas, according to those people, these folks are not among ASR members so would have to wait to hear from the 'better hearing' forums for that aspect. It is not expensive enough though...
Issue on this was already discussed on this thread before. I'll just briefly talk about it here.Then how come everybody isn't making amps like this? The idea of getting exactly what comes out of a DAC should be the call to all, i.e. "A wire with gain." I mean, I'm just asking, because I don't know. You make it sound so easy. I have the 2.5 and I've never heard such clarity in a headphone rig since I had the SPL Auditor. Maybe not even then.
Can folks make a speaker amp with this kind of technology and low distortion that's not THX?
Then how come everybody isn't making amps like this? The idea of getting exactly what comes out of a DAC should be the call to all, i.e. "A wire with gain." I mean, I'm just asking, because I don't know. You make it sound so easy. I have the 2.5 and I've never heard such clarity in a headphone rig since I had the SPL Auditor. Maybe not even then.
Can folks make a speaker amp with this kind of technology and low distortion that's not THX?
It was possible not to raise the topic of an external relay attenuator, but other discrete controls did not fit inside the amplifier. It is clear that to obtain an additional 10.20 dB to the characteristics, other design approaches are required. We can say this is one of the approaches to abandon the shortcomings of digital attenuators. If you use a passive relay attenuator with memory position contacts, then turn off the power after setting the volume level.That depends on how low you were talking about. Atom level or THX level. It's truly different. There are a lot more to consider if you want -130db harmonics with high gain with low impedance load with unbalanced input and perhaps with balanced output (which is more difficult to achieve same performance than unbalanced out).
Capacitors, resistors in feedback, no star grounding, power supply choice and placement, just to name a few. These can affect another 12-20db performance from already decent engineering (eg no x7r in feedback path, star-grounding, copper pour etc).
liked the sound better that way.
I have no idea why you never experienced such clarity before.
It can, with the most common configuration of differential amplifier.Quick question for you all: If there are XLR inputs on the back of this amp, but no balanced out for the headphone, does the output still roughly double using XLR in? It looks like it did for Amirm's testing, but unless the innards are balanced out to SE I don't see how it is possible.