Topping E50 II DAC is up on the Topping Store

[Sokel]

The room does not change, nothing changed buy going from rca to xlr. We are measuring the difference, not how flat speakers sound.

Measurements show different sound via rca vs xlr, which goes in line what I heard.

We don't examine the FR and flatness, is just that an untouched mic at 1 meter and with some room out of the way will give a far better picture.
Repeatability is also a good factor.

You can also try MMM measurement.
This is not about us and no one can judge preference. Is about your own way to detect what you like and what you don't.
For own entertainment anything goes, it's not like if you were mixing and mastering and producing music.

 

[RickS]

While interesting (I would try switching channels), this recent Topping discussion is off topic here.

Please create a new thread or suggest an existing one and will move the posts to it. Thanks!

 

[Gregm]

It is indeed an interesting result, thanks for trying it out. I too find the idea of switching channels also attractive.
Anyway, this short off-topic dicussion may find a new home...

 

[RickS]

...and reset to default settings!

 

[dcolak]

We don't examine the FR and flatness, is just that an untouched mic at 1 meter and with some room out of the way will give a far better picture.
Repeatability is also a good factor.

You can also try MMM measurement.
This is not about us and no one can judge preference. Is about your own way to detect what you like and what you don't.
For own entertainment anything goes, it's not like if you were mixing and mastering and producing music.

We just wanted to show that there is difference in sound when using XLR vs RCA, and there was.

It's repeatable, has nothing to do with room, no matter where you put your microphone. Room does not change, mic position does not change, all that changed were the cables and how we connected the DAC with the AMP.

So, there is it, measured difference, 3dB+ above 10KHz.

 

[ziggurcat]

What are the differences between the desktop and phone/tablet apps?

If I wanted to take room/speaker measurements, what additional gear / software would I need, and how could I apply the peq function to correct any deficiency?

Topping Tune is just for adding/creating your PEQ profiles, the phone/tablet app allows you to change settings, etc... on the DAC, but I don't think the Home app does the PEQ profiles (i.e. I don't think you can create any new profiles, but I think you can edit the ones that are saved on the device -- someone can correct me if I'm wrong on that).

REW is what you could use to take speaker measurements, and use REW's auto EQ to create a 10-band filter file that you can import into Topping Tune.

 

[RedLine]

We just wanted to show that there is difference in sound when using XLR vs RCA, and there was.

It's repeatable, has nothing to do with room, no matter where you put your microphone. Room does not change, mic position does not change, all that changed were the cables and how we connected the DAC with the AMP.

So, there is it, measured difference, 3dB+ above 10KHz.

I have the E50II, so lets see if there is a frequency response difference between the RCA and TRS output using MultiTone:

First RCA:

Now TRS:

So no surprises there, it's flat.

Only way to know for sure, is to start swapping components. The problem will reveal itself eventually, you just have to be thorough.

 

[Julf]

We just wanted to show that there is difference in sound when using XLR vs RCA, and there was.

And I wanted you to verify if it is audible (with a double-blind listening test), but you don't seem to want to do that.

It's repeatable, has nothing to do with room, no matter where you put your microphone. Room does not change, mic position does not change, all that changed were the cables and how we connected the DAC with the AMP.

So, there is it, measured difference, 3dB+ above 10KHz.

It could be a result of your measurement method, or it could be something wrong/broken.

 

[thcdru2k]

Was the E50 II measured directly at the RCA and TRS outputs (electrically) or only through the speaker/room/mic chain?
Were RCA and TRS level-matched at the amplifier input? The balanced output has substantially higher available voltage.

Genuinely curious because I just ordered one.

 

[thcdru2k]

If we look at redline's measurements and assume what you are hearing is real it must be downstream either amplifier input stage, cable/wiring issue, level mismatch, or measurement artifact

 

[thcdru2k]

Keep in mind 2.6/5.6 Vrms on RCA and 5.3/11.3 Vrms on balanced TRS so that must be taken into account

 

[RedLine]

And I wanted you to verify if it is audible (with a double-blind listening test), but you don't seem to want to do that.

That's a waste of time now that he's measured it. The next step is finding the faulty component or if the difference remains, improving the measurement method.

I have made many measurement errors over the years, it's always satisfying to learn from and improve our mistakes.

It's unlikley to be the cables, the DAC, or the pre amp. It's probably the power amp acting strangely depending on input, or measurement error. For it to be the DAC, he would have to be changing inputs via the profile buttons and one of the profiles would have to have a PEQ active. Thats unlikely as well.

 

[Julf]

It's unlikley to be the cables, the DAC, or the pre amp. It's probably the power amp acting strangely depending on input, or measurement error.

I suspect the latter, that is why I would like to have verification by some other method.

 

[dcolak]

I have the E50II, so lets see if there is a frequency response difference between the RCA and TRS output using MultiTone:

First RCA:
View attachment 536491

Now TRS:
View attachment 536492

So no surprises there, it's flat.

Only way to know for sure, is to start swapping components. The problem will reveal itself eventually, you just have to be thorough.

We were measuring Fosi V3 mono sound through speakers when using RCA vs XLR inputs.

Nothing to do with E50II, its output is perfect, RCA or XLR.

I am afraid moderator put these posts into a wrong thread.

 

[dcolak]

That's a waste of time now that he's measured it. The next step is finding the faulty component or if the difference remains, improving the measurement method.

I have made many measurement errors over the years, it's always satisfying to learn from and improve our mistakes.

It's unlikley to be the cables, the DAC, or the pre amp. It's probably the power amp acting strangely depending on input, or measurement error. For it to be the DAC, he would have to be changing inputs via the profile buttons and one of the profiles would have to have a PEQ active. Thats unlikely as well.

Exactly this! RedLine is correct. It's the amp.

 

[Julf]

Exactly this! RedLine is correct. It's the amp.

How do you know?

 

[dcolak]

How do you know?

I measured it.

 

[Julf]

I measured it.

Several of us have pointed out multiple possible reasons. What makes you so sure it is the amp?

 

[dcolak]

Several of us have pointed out multiple possible reasons. What makes you so sure it is the amp?

Several of you pointed at *room* which made no sense. You said "you cannot measure same thing twice and get same response" which also didn't make much sense.

Use RCA inputs with FOSI -> one frequency response. Use XLR inputs with FOSI -> different frequency response. Everything else, unchanged, speakers included.

 

[Julf]

Several of you pointed at *room* which made no sense. You said "you cannot measure same thing twice and get same response" which also didn't make much sense.

It might not make much sense to you, but believe me, I have seen quite impressive differences in measured (in-room) treble response just because someone was standing in a slightly different spot, or had knocked the mic a few centimeters off...

I asked if you would post your multiple measurements you stated you had done (that would help address those concerns). You declined. Why?