[Blotto80]

MUSES8832, you can check stock photos under the spoiler

Can you elaborate on the differences you're experiencing from the Opamp swap?

 

[stemplar]

I think you missed the meaning of my post. I don't care about IOS or Android or OTG, I was just asking it there is a possibility to completely switch off charging WHEN I USE THE Q5 WITH MY PC, so that my battery can discharge longer, and reach for example 30-40% and not always stay between 90-100% as is the case with my usage pattern.

Yes, now I understand what your problem is. But, in my opinion, the battery does not suffer much damage.

 

[stemplar]

MUSES8832, you can check stock photos under the spoiler

And if I can ask? There is an audible difference between OPA vs. MUSES? If you could explain it more.
On the other hand, I think the guarantee is jumping ..
I'm listening to the HD660S / HD650 (just in balance), in this price / service / development (amplifier modules, etc.) I'm very happy with the Q5. I tried the HD660S with a Chord Mojo, something was very crappy.
But the HD650 is better with Mojo.

 

[fgfgfg0923]

MUSES much more natural, precision and warm sound (I guess with AM3B it will be almost HM-60X warmth )
Wider and deeper soundstage (more "airy" sound), more details, I'm not really specialist to describe the sound but it just outbeats 1642 in everything.
If not MUSES than at least OPA1612 must be installed, used to experience the same with HiFi-M8 and Mini-M8: OPA1662 -> OPA1612 do much better SQ.

No idea how do you do guys but here in Russia we have several mods for Fiio AM1 and AM3A amps which are also nothing to discuss about their SQ compared to stock ones (MUSES8920 + OPA1622 + new PSU)

 

[stemplar]

MUSES much more natural, precision and warm sound (I guess with AM3B it will be almost HM-60X warmth )
Wider and deeper soundstage (more "airy" sound), more details, I'm not really specialist to describe the sound but it just outbeats 1642 in everything.
If not MUSES than at least OPA1612 must be installed, used to experience the same with HiFi-M8 and Mini-M8: OPA1662 -> OPA1612 do much better SQ.

No idea how do you do guys but here in Russia we have several mods for Fiio AM1 and AM3A amps which are also nothing to discuss about their SQ compared to stock ones (MUSES8920 + OPA1622 + new PSU)

I understand. Thanks for the reply. I have AM3B now. It's really warmer, thicker and wider than the stock AM3A. It may be due to the balanced mode too. I bought the HD650 because it needed more power and it was +7 mW (300 ohm) . This point is enough for the DsD / 24Bit Flac to sound better. OPA926 is in it.

 

[fgfgfg0923]

OPA926 is in it.

AM3A = AM3B in terms of used schematic and opamps. The difference is in power section and PCB layout.

 

[kukkurovaca]

since I have Q5 : Am3B 300ohm-70mW (balanced) vs. Am5 300 ohm 55mW (only unbalanced)((AM3A 300 ohm 63 mW (balanced) )) I bought the AM3B for the + 7mW and it was worth it, the HD650, which is hard to drive. It is not anemic, it can drive with great dynamics.

Unless thirtyCruisers gets a modded T50RP/T40RP, that's a single-ended headphone.

 

[thirtyCruisers]

Well, a modded is out of reach for me for now. I was only going to buy some pads. However if the balanced mod can be done easily enough, might try doing that.
Anyway, thanks to everyone who replied.

 

[stemplar]

Unless thirtyCruisers gets a modded T50RP/T40RP, that's a single-ended headphone.

FiiO M9 is also interesting. All serious gain! + 7mW compared to Q5 AM3B. (70 mW balanced)
The M9: ≥77mW (300Ω / THD + N <1% ... khmm (in balanced)
SoC: Samsung Exynos 7270, DAC: AK4490EN * 2, FPGA: A3P030, LPF: OPA1612, BUF: OPA1622 * 2
Bluetooth chip: SAMSUNG S5N5C10B01-6330
Could this have been supposed to wait?

 

[fgfgfg0923]

that's a single-ended headphone.

I have T20RPmk3 with hybrid pads from HM5, custom headband (like massdrop did) and re-wired cups with angled 3.5 TRRS in the left one with Sony pin-out.
I have balanced 2.5mm cable and RSA for Mini-M8, both Q5 with AM3A and Mini-M8 do the well job with Fostex (Centrance do much better) but they clearly suck compared to SE of my Xonar One.

 

[FiiO]

Hi @FiiO ! How's it going?

Is there really no way to be able to use one of the USB ports for digital signal only, and NO charging? Since we have two ports?
I use my Q5 80% of the time at my work desk, connected to my PC, so it's always charging. I use Bluetooth maybe 1 to 1.5 hours/day, and my battery is always between 90% - 100% which is NOT very good.
I would like to have longer discharge cycles, so I would like to be able to switch off charging completely while connected to PC.
At least can it be done using a special cable or adapter with my PC, the same way as your OTG cable for smartphones that is not charging the Q5?

Dear friend,

When using as a DAC for computer, Q5 use the power supply from USB port and meanwhile the computer will charge the Q5.
If the Q5 is not charged and using the battery from the Q5 only when working as DAC, the Q5 would power off while it is out of battery. And you would need to charge it before using as the USB DAC again. This is not some users prefer and we could not satisfy all the need for all users.
Besides, in this case it can ensure that the battery may be fully charged while at the same time guaranteeing proper function of the device. We may not consider about changing this at present.

Best regards

 

[KopaneDePooj]

Dear friend,

When using as a DAC for computer, Q5 use the power supply from USB port and meanwhile the computer will charge the Q5.
If the Q5 is not charged and using the battery from the Q5 only when working as DAC, the Q5 would power off while it is out of battery. And you would need to charge it before using as the USB DAC again. This is not some users prefer and we could not satisfy all the need for all users.
Besides, in this case it can ensure that the battery may be fully charged while at the same time guaranteeing proper function of the device. We may not consider about changing this at present.

Best regards

I was thinking about a switch in settings not a permanent modification. Yes, sometimes I want to charge when I'm playing music at PC, but not always.
Besides, we have a second USB port specifically for charging, so I don't see why not make the setting more flexible as I described.

 

[477621]

I think it will not be good because the whole symmetric connection is different.

It works. Sound is noticeably stronger than 3.5. Checked with a multimeter and connections as expected.

Yes, but I think it's not worth it, as long as you'll use the balanced port, better add $5 more for that cable I posted and have a true balanced connection, even if the extra benefits besides more power are only in theory
Plus the existing 3.5 jack + that adapter are bulkier and prone to damage.

I use my Q5 as line out only, I just wanted to try this. My headphone amp is my Slee.

 

[stemplar]

Dear friend,

When using as a DAC for computer, Q5 use the power supply from USB port and meanwhile the computer will charge the Q5.
If the Q5 is not charged and using the battery from the Q5 only when working as DAC, the Q5 would power off while it is out of battery. And you would need to charge it before using as the USB DAC again. This is not some users prefer and we could not satisfy all the need for all users.
Besides, in this case it can ensure that the battery may be fully charged while at the same time guaranteeing proper function of the device. We may not consider about changing this at present.

Best regards

Dear FiiO!
Are you here (?) I have a bigger problem. With a couple of pages he was described as backward as I did. System Uprgrade Win Installer Does Not Work !!
(the BT installer did, though it did save only on Win10 / 32, not 64)
Win10 / 8/7 64/32 bit. All in all, DLL sends a bug, anyway, only max win 8 is compatible with the installer .. Please look at this if someone has worked with FiiO. Thank you for responding,
(many of them are interesting for the future. Other than that, I have a very good opinion on the equipment itself.) THX

 

[fgfgfg0923]

Windows 7 x64​