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Review: ZERO 24 BIT/192KHz DAC/Headphone Amp/Pre-Amp - Page 623

post #9331 of 9361

Since typical amplifier (stand-alone) has input impedance of 10kohm the output will be "only" 4Vrms. :rolleyes:

Yes it's bad for signal, but it's like having preamplifier which is quite common and not supposed to be bad...

post #9332 of 9361
Quote:
Originally Posted by AmarokCZ View Post
 

Since typical amplifier (stand-alone) has input impedance of 10kohm the output will be "only" 4Vrms. :rolleyes:

Yes it's bad for signal, but it's like having preamplifier which is quite common and not supposed to be bad...

 

>>Since typical amplifier (stand-alone) has input impedance of 10kohm the output will be "only" 4Vrms. :rolleyes:>>>

Would You explain this in detail. I thought that 2Vrms input is quite enough for every power amp even with 10kohm input impedance. I couldn't made sence with this.

Thanks

post #9333 of 9361

Yes, 2Vrms is enough, but here the output will be 4Vrms: output from headphone amplifier is 8Vrms, output impedance of regulated LINE OUT is the same as input impedance of connected amplifier so the output voltage will be 4Vrms (resistive voltage divider: input 8V ant two resistors, both 10k).

post #9334 of 9361

Has anybody tried this amp with an Audeze headphone? Or any planar magnetic for that matter. If so, what's it like? Thanks!

post #9335 of 9361

Has anyone tried this with HD650, and made comparisons between this and the Schiit Vali?

post #9336 of 9361

Anybody can help to find out,how the Zero DAC´s power wires goes?My Zero´s power wires are like in Penchun´s first post,except second one from right is yellow instead white.

I am plan to use this power to my Xmos based USB to SBDIF converter/DAC.I need about +10-15 AC and i think Zero´s power out is suitable for that.

post #9337 of 9361

Does anyone know a reliable retailer for these off of eBay?

 

Thanks!

post #9338 of 9361

Does anyone know what the output power on this thing is? Cant find it anywhere.

post #9339 of 9361
Quote:
Originally Posted by smirnoff04 View Post

Woot. The Zero arrived today.

 

Almost 6 years to the day since that post, and I've used it on a daily basis ever since. Countless hours of unmodded enjoyment. :)

 

Except today it stopped working! I opened it up and didn't see any obvious since of destruction. I tried pressing each of the two reset buttons which made some leds blink, but didn't get the sound working again.

 

I tried swapping out the fuse with the spare (even though the original didn't look burnt out) and that didn't fix anything either.

 

It powers on and off just fine, and you can cycle through the inputs, but no sound. Tried coax and spdif... nada.

 

Anyone have a magic solution or is my beloved Zero dead forever?

post #9340 of 9361

Have you check the op-amps? Maybe one of couple of them died.

post #9341 of 9361

I wouldn't know where to begin, and probably don't have to equipment to check them anyways. :o

 

I'm assuming they're the little black chips that I can pop out...

post #9342 of 9361

yea they are, and you have to make sure the circle or notch on them match the notches on the op-amp socket. you need a IC remover tool

post #9343 of 9361

Thanks genclaymore.

 

Out of curiosity what would "checking" them entail? I assume I'd need a multimeter at the least?

 

How much might a replacement chip cost, ballpark?

post #9344 of 9361
Quote:
Originally Posted by smirnoff04 View Post
 

Thanks genclaymore.

 

Out of curiosity what would "checking" them entail? I assume I'd need a multimeter at the least?

 

How much might a replacement chip cost, ballpark?

Depends on which op-amp it is, Some can be had for 4 dollars some more. it be the Dip-8 ones that you want. Because I know if a op-amp goes bad you will loose sound, as I have had some bad op-amps in the past.

post #9345 of 9361

Just got my Zero yesterday and have been listening to it since power-up and it seems to be getting better all the time(approx. 12 hours on it now) and I have tried an array of different headphones with various impedances and it drives all of them just fine. I must say that this is a helluva buy at less than $200.00 delivered! It makes stringed instruments sound very natural, even my Q701's sound good with it and that is saying something!

If you are reading this and are in doubt about getting one, I would have to say-go for it!

Glad I read the original review of this unit as that is what convinced me to purchase it. Happy camper.

Now back to the music selection and trying some more headphones with it.

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