[Dark Helmet]

I agree that z1 with stock o amp *may* sound hollow. But this one seems good to me so far... Loving it by the way, especially impressed about how good my budget earbuds sounds with it. Astonishing.

My only gripe now is sub bass roll off. I hope it will get better with burnin

Is the Sub Bass roll off similar to the Walnut? Because I feel that the Z1 has some sub bass roll off but very minimal. I do have the Muses 02 in mine.

 

[noknok23]

Dunno it's been too long I haven't listened to walnut but I think it's not as bad. I'm using burson on the z2 and high end opamp does seems to help with the roll off. I'm only using earbuds so it's not as bad as full size headphones, it's quite bearable to my taste now.

(Don't have the muses02 yet though I feel in love with burson rn maybe it is better fit with akm chip than z1 ess??)

 

[BurntToast12]

Does the z2 has a delay in dac mode like the z1?

 

[Ver JJ]

Does the z2 has a delay in dac mode like the z1?

In my case, yes.

 

[theoutsider]

About half a second delay. When watching a movie, the sound syncs appropriately with the video albeit a delayed start.

Does the z2 has a delay in dac mode like the z1?

 

[MLTKSHHBT]

@Frederick Wang Where did you get the op amp from? I checked around eBay, other than the Chinese sellers, the only Korean one with price even more expensive than muses02? (I think is more appropriate to bring the discussion back here).

 

[golov17]

http://www.profusionplc.com/parts/muses02

 

[Ivan TT]

 

[theoutsider]

Yes.
This is known for Z1, the USB input only accepts 16bits/48Khz.
This limitation is only for the USB DAC input, not for the microsd card files.

I think it should be the same in Z2, but I don't have it.
Try foobar with WASAPI output, you'll have to resample everything to 48Khz and use 16bit output, other USB DAC modes are not supported with Z1.
EDIT: You can use foobar options DSP real time resampler.

Z2 runs on 16 bit / 48 000 Hz as USB DAC

 

[Frederick Wang]

@Frederick Wang Where did you get the op amp from? I checked around eBay, other than the Chinese sellers, the only Korean one with price even more expensive than muses02? (I think is more appropriate to bring the discussion back here).

I get them from Tmall (the fancy part of taobao...), the price I paid was higher than MUSES02

 

[musicday]

http://www.profusionplc.com/parts/muses02

By adding the muses02 how much the sound is improved? Does is stay neutral or bright? Any other benefits? Longer battery life, etc? Thanks.

 

[golov17]

By adding the muses02 how much the sound is improved? Does is stay neutral or bright? Any other benefits? Longer battery life, etc? Thanks.

I have not tried z2 with Muses02, I'm quite satisfied with Burson v5i

 

[macky112]

Is the Sub Bass roll off similar to the Walnut? Because I feel that the Z1 has some sub bass roll off but very minimal. I do have the Muses 02 in mine.

aside from their design and circuitry differences, V2, V2s, Z1, Z2 all have 100ohm output impedance, which causes sub-bass roll off.

 

[Dark Helmet]

aside from their design and circuitry differences, V2, V2s, Z1, Z2 all have 100ohm output impedance, which causes sub-bass roll off.

That may be, but I know that the V2 has more roll off than the Z1. The Z1 roll off is there, but not significant enough to me.

 

[Ivan TT]

Burning in is sooooooo excruciating....