[abitdeef]

it seems like a lottery - can’t spot a pattern still

Seems absolutely random. Very puzzling indeed, if it was a manufacturing defect you'd think they would be from the same batch, or at least a correlation of semi sequential numbers. I can't see them putting the wrong resistors/caps in so randomly.

If my multimeter wasn't on the fritz I'd check the output resistance. Supposed to be about 2 ohms.

 

[casper98]

I looked for a firehose/MBN/ELF config for QFIL a few days ago but didn't find one. Maybe it will pop up.

Where do you look for the firehose/MBN/ELF config?

 

[psikey]

Naturally there are a lot of concerning posts in this thread now and rightly so, however, while I await my 'out for delivery' email, I'd like to ask.
For those who have their A300 series, what things have impressed or even surprised you in a good way so far?

Proper battery life, Android 12 and a decent CPU/SOC for music use in such a tiny, lightweight form.
Audio quality from its 3.5mm not a long way away from its more expensive brothers (lower impedance would have been nice).

 

[psikey]

Also did factory reset with no change.

I daren't do a factory reset Might end up with wonky bass!

 

[AtomicUK]

I'll find out later. If it has the problem I'll contact accessory jack and Sony.

As mine is inbound from Accessory Jack and 'if' I were to have a problem, i'd be interested to know if you have spoken to AJ. Many thanks.

 

[Ryokan]

I daren't do a factory reset Might end up with wonky bass!

Would prove it's not hardware?

 

[psikey]

Would prove it's not hardware?

Sorry, not prepared to risk it as a Japanese import to UK. Wouldn't be fun trying to return it!

 

[Ryokan]

Sorry, not prepared to risk it as a Japanese import to UK. Wouldn't be fun trying to return it!

Don't blame you, though I'm sure it would sound the same.

 

[rlw6534]

Where do you look for the firehose/MBN/ELF config?

Google primarily...

XDA forums and similar sites also for QCS2290 SOC tools.

 

[casper98]

Google primarily...

XDA forums and similar sites also for QCS2290 SOC tools.

Hopefully it will popout soon as I really want to root it , I might make post for the config in XDA….

 

[casper98]

A306 Singapore version (Capped) : 5000078

I am not sure if I did it right

 

[rlw6534]

A306 Singapore version (Capped) : 5000078

I am not sure if I did it right

Looks like random noise. Are you sure you were in USB DAC mode and connected via USB (borrowed photo)?

 

[abitdeef]

As mine is inbound from Accessory Jack and 'if' I were to have a problem, i'd be interested to know if you have spoken to AJ. Many thanks.

Nope but after I test and if there's a problem I will contact them. I've never had any problems with Sony stuff. I know they don't do refunds for dissatisfaction, but they do on defective items. Let's hope we're both OK with ours. I mean I love the sound. And if there is a problem Sony directly addresses it.

 

[psikey]

So, a little fun trying out the 4.4mm to 3.5mm balanced adapter to see if having seperate earths changes/improves things.

Only tried with my FD7 (Dynamic) and SE846 (BA).

With FD7 , same silver cable, just swapping interchangeable plugs. With SE846 using a Sony 3.5mm and a Fiio 4.4mm cable.

Basically, adapter is exactly as described, no connection issue and really nice build quality, especial for £10!

With my FD7 at 60/120 for both SE and balanced. Minor difference but I think I dedect a blacker space, room seems larger and everything a bit more pristine, clearer.

With my SE846 I'm not detecting hiss like when new for some reason. Volume at 50/120 for both SE and balanced. Can't say I notice any difference with these.

Few photos

 

[psikey]

Now just tried my M9 (5BA) with included 3.5mm and 4.4mm balanced.

Slightly more open, more clarity maybe slight more open sound stage.

Same volume, 75/120 for both.