So, the Objective2 headphone amp - designed entirely around the measurements? (PLEASE READ RULES BEFORE POSTING)

[Shike]

Quote:

the performance goal posts keep moving to suit a particular line of argument.

How so?  It's made mostly for either or - pick your gain based on how you're going to use it.  I don't see what the problem here is

 

 

[kwkarth]

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That part I know. I was wondering about the conversion from 1db/V to 1db/mW, which I'm pretty sure has a log or two in there. I could probably do it, but I'm a little too sleep deprived to crunch numbers right now. 
 
... doubling power... roughly 6dB... 2^x... equals P... zzzzzz

20x log(x/y) for voltage ratio
 
From Wiki:
dBm indicates that the reference quantity is one milliwatt, while dBu is referenced to 0.775 voltsRMS.^[2]

 

[kwkarth]

More on topic here:
 
How does this amp "sound?"  Or does that not matter as long as somebody is happy with a few selective measurements?

 

[bcg27]

Quote:

More on topic here:
 
How does this amp "sound?"  Or does that not matter as long as somebody is happy with a few selective measurements?

Has anyone built it yet? I was under the impression the designer himself only just got the updated pcbs

 

[Head Injury]

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More on topic here:
 
How does this amp "sound?"  Or does that not matter as long as somebody is happy with a few selective measurements?

It sounds uncolored, with low distortion and noise.

 

[kwkarth]

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Has anyone built it yet? I was under the impression the designer himself only just got the updated pcbs

We've all sure been flapping a lot of gums without any flapping of ears...
 
One report I recall in this thread of someone who built point to point from schematic (& I have no idea about what the lead dress looked like) that review was mixed, as I recall.  Real world dynamic range vs. gain was mentioned as a concern, again, if I recall correctly. 
 
 

 

[kwkarth]

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It sounds uncolored, with low distortion and noise.

Great!  Can you be more specific?
 
 

 

[fishski13]

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How so?  It's made mostly for either or - pick your gain based on how you're going to use it.  I don't see what the problem here is

 

there is no problem as long as you understand the performance limitations and keep them in context.  i think some have glossed over the limitations.  
 

 

[Head Injury]

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Great!  Can you be more specific?

 
Specific how? It's not supposed to sound like anything.

 

[kwkarth]

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Specific how? It's not supposed to sound like anything.

Well, since this isn't the sound science forum...  I forgot we had some flat earthers here.
 
How about what was your source?  What were your headphones.  What sort of music?  Did you have it turned on?  Battery PS or AC?  You know, that sort of stuff.
 

 

[Head Injury]

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Well, since this isn't the sound science forum...  I forgot we had some flat earthers here.
 
How about what was your source?  What were your headphones.  What sort of music?  Did you have it turned on?  Battery PS or AC?  You know, that sort of stuff.

I haven't heard it. Flat frequency response and low noise/distortion/crosstalk/etc. means that, when paired with a similarly flat DAC, it should sound like the headphones and nothing else. Provided there's no clipping, obviously.
 
I will remind you that, though this isn't the Science forum, the thread is designed to be an objective discussion of the amp's capabilities. The amp itself was designed for objective performance, not subjective sound quality. Subjective impressions beyond measurable phenomena don't matter for this amp. Not for the people it's designed to please.
 
If you'd like to provide a reason why it wouldn't sound like nothing, when not driven to clipping or otherwise used in a way it isn't meant to be, please do.

 

[fishski13]

Quote:

I haven't heard it. Flat frequency response and low noise/distortion/crosstalk/etc. means that, when paired with a similarly flat DAC, it should sound like the headphones and nothing else. Provided there's no clipping, obviously.
 
I will remind you that, though this isn't the Science forum, the thread is designed to be an objective discussion of the amp's capabilities. The amp itself was designed for objective performance, not subjective sound quality. Subjective impressions beyond measurable phenomena don't matter for this amp. Not for the people it's designed to please.
 
If you'd like to provide a reason why it wouldn't sound like nothing, when not driven to clipping or otherwise used in a way it isn't meant to be, please do.

 
what does nothing sound like?
 
 

 

[Steve Eddy]

Quote:

More on topic here:
 
How does this amp "sound?"  Or does that not matter as long as somebody is happy with a few selective measurements?

But the topic is the Objective2 headphone amp, the objective of which was objective performance, hence the name Objective2. Objectively speaking of course.

 
Edit: Oops. Didn't see HE's post. Took a short break while writing my post.
 
se
 
 
 

 

[Head Injury]

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what does nothing sound like?

The headphones.

 

[kwkarth]

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But the topic is the Objective2 headphone amp, the objective of which was objective performance, hence the name Objective2. Objectively speaking of course.

 
se

You're right, I forgot that objective and substantive are sort of antonyms in this thread.