[FiiO BTR17/BTR7] True Lossless Bluetooth, Portable Bluetooth DAC and Headphone Amplifier BTR17 Is Officially Released!

[EdgeDC]

A somewhat related question: What are the recommended volume settings on BTR7 to get line level output on the 3.5mm port, to be fed into another amp? In other words, what settings would produce the cleanest and strongest signal for further amplification?

You are indirectly getting to a point I have made with FiiO... that I wish the BTR7 (and also the BTR5, but that's secondary now) had a Line Out configuration as part of its design - especially since it has a Car mode, which suggests it is for connecting to your car's stereo system... and what is the best method for that? Line Out to Aux In, of course (unless your car stereo has a Balanced Line In - very rare!).

...but no, they once again did not provide a specific Line Out mode with the BTR7.

 

[theElk]

You are indirectly getting to a point I have made with FiiO... that I wish the BTR7 (and also the BTR5, but that's secondary now) had a Line Out configuration as part of its design - especially since it has a Car mode, which suggests it is for connecting to your car's stereo system... and what is the best method for that? Line Out to Aux In, of course.

...but no, they once again did not provide a specific Line Out mode with the BTR7.

@FiiO Willson or @JamesFiiO replied to you that they had no Space for the line out available and that the PO measured near a dedicated line out so they skipped that.
But the Answer to @dsonance question would be interesting if they can provide a setting for the line out volume.

But bringing an extra singalpath to the 3.5mm port or implementing an extra port in such a tiny device that also uses BT will just ruin the SNR-Specs
A Line-Out-Mode where the Amp gets fixed to a Value for best performance or a range, printed in the manual would be nice.
For the 1.4Vrms for the topping nx7 my multimeter said 51 in high gain. At 58 it reached 2Vrms.
But an extra singalpath for the use in cars would do nothing good. Maybe you can hear the difference in a car with a stoped motor in your garage in the middle of the night with no sounds around you and a high-end aftermarket car hifisystem when using the USB-Dac-Mode with a maxed out amp. But I doubt that you then will use a btr7 as a dac an not use the integrated hardware.

My long answer in short:
It would be possible to integrate such a function (probably double wiring the 3.5 port) but the headache to do this without ruining the sound output would skyrocket the engineering effort and so the retail price. So in the end nothing would be gained as the product would have to compete in a higher price tier.

 

[jsmiller58]

Hi,
BTR7 have 1V rms on the 3.5mm output with low gain.
and 1.6V rms on the 4.4mm output with low gain. 3.2Vrms with high gain.

These values don’t seem to be consistent with the audio science review (which seem to have higher numbers)… https://www.audiosciencereview.com/...s/fiio-btr7-review-portable-dac-hp-amp.36620/

 

[theElk]

These values don’t seem to be consistent with the audio science review (which seem to have higher numbers)… https://www.audiosciencereview.com/...s/fiio-btr7-review-portable-dac-hp-amp.36620/

The Measurements on ASR are in high Gain.

 

[jerintp]

Hi Guys,

Anyone here have experience using BTR7 with campfire dorado 2020 (10 Om impedence) ? i was planning to buy BTR7 to use with iphone 11 / macbook pro as source and Dorado 2020 IEM ..

Any info will be helpful! i wanted a porable setup to get better sound...

PS: Also I was also planning to use them with Hifiman XS edition ..... ( i currently use zen air can /dac stack for Hifiman xs edition with same sources mentioned above)..

 

[EdgeDC]

@FiiO Willson or @JamesFiiO replied to you that they had no Space for the line out available and that the PO measured near a dedicated line out so they skipped that.
But the Answer to @dsonance question would be interesting if they can provide a setting for the line out volume.

But bringing an extra singalpath to the 3.5mm port or implementing an extra port in such a tiny device that also uses BT will just ruin the SNR-Specs
A Line-Out-Mode where the Amp gets fixed to a Value for best performance or a range, printed in the manual would be nice.
But an extra singalpath for the use in cars would do nothing good. Maybe you can hear the difference in a car with a stoped motor in your garage in the middle of the night with no sounds around you and a high-end aftermarket car hifisystem when using the USB-Dac-Mode with a maxed out amp. But I doubt that you then will use a btr7 as a dac an not use the integrated hardware.

My long answer in short:
It would be possible to integrate such a function (probably double wiring the 3.5 port) but the headache to do this without ruining the sound output would skyrocket the engineering effort and so the retail price. So in the end nothing would be gained as the product would have to compete in a higher price tier.

Yes but I never asked for a dedicated LO port - that was never part of my request. I had always figured the double use case of the existing PO port would have been how it's done, just like FiiO has done on many of their DAPs.

However, I agree that if doing so would lower SQ for headphone use, it would not be a worthwhile trade off.

 

[jsmiller58]

The Measurements on ASR are in high Gain.

Right, some of them are, but @FiiO Willson quoted 3,2Vrms at high gain which does not match. Just trying to make sure I understand the numbers and how they compare.

 

[brazy001]

Wrong thread - sorry

 

[jsmiller58]

New ifi go blu user here and ordered the leather case at the same time. Has anyone else noticed that the case puts pressure on the wheel so that it can't turn.

To leave enough room for the wheel to operate freely, the case needs to be hanging off the bottom and the top corners exposed.

Makes me not want to use the leather case at all.

Wrong thread?

 

[FiiO Willson]

A somewhat related question: What are the recommended volume settings on BTR7 to get line level output on the 3.5mm port, to be fed into another amp? In other words, what settings would produce the cleanest and strongest signal for further amplification?

Hello, BTR7 not have LO output.
Our current 3.5mm output and 4.4mm output performance has done a very good job, you can try to connect these two interfaces directly

 

[FiiO Willson]

Right, some of them are, but @FiiO Willson quoted 3,2Vrms at high gain which does not match. Just trying to make sure I understand the numbers and how they compare.

Hello, Thank you very much for your careful observation
1，BTR7 have a "Boost bal out mode", if you turn it on, it can reach 5.7Vrms@600ohm
2，BTR7 have 3.2Vrms@32ohm and 3.4Vrms@600ohm, it is normal and varies somewhat with different loads~~
3，We usually test a few more machines and take the middle value to publish on the official website, so....

 

[jsmiller58]

Hello, Thank you very much for your careful observation
1，BTR7 have a "Boost bal out mode", if you turn it on, it can reach 5.7Vrms@600ohm
2，BTR7 have 3.2Vrms@32ohm and 3.4Vrms@600ohm, it is normal and varies somewhat with different loads~~
3，We usually test a few more machines and take the middle value to publish on the official website, so....

Thank you! That makes sense!

 

[theElk]

Hello, BTR7 not have LO output.
Our current 3.5mm output and 4.4mm output performance has done a very good job, you can try to connect these two interfaces directly

I think @dsonance wanted a volume value (like 48/60 in high gain, or 60/60 in low gain) as an idea with what volume level on the btr7 he most likely reaches the line-out voltage for an aux-in with a 3.5mm connection.

 

[dsonance]

I think @dsonance wanted a volume value (like 48/60 in high gain, or 60/60 in low gain) as an idea with what volume level on the btr7 he most likely reaches the line-out voltage for an aux-in with a 3.5mm connection.

That's right, @theElk, that is exactly what I was asking about.

In practical terms, @FiiO Willson, I just wanted to know what you would recommend to set the volume and gain to on BTR7, when its 3.5mm PO output is used to connect to another amp.

 

[jerintp]

Hi Guys,

Anyone here have experience using BTR7 with campfire dorado 2020 (10 Om impedence) ? i was planning to buy BTR7 to use with iphone 11 / macbook pro as source and Dorado 2020 IEM ..

Any info will be helpful! i wanted a porable setup to get better sound...

PS: Also I was also planning to use them with Hifiman XS edition ..... ( i currently use zen air can /dac stack for Hifiman xs edition with same sources mentioned above)..