[Bastianpp]

hello
im using my pc -> cv2+ -> nad c355 -> speakers, what's the difference between pre out and dac out? pre out sound more loud
Ty

 

[augustr]

hello
im using my pc -> cv2+ -> nad c355 -> speakers, what's the difference between pre out and dac out? pre out sound more loud
Ty

DAC-out is fixed volume, pre-out is variable volume, used to feed power amps or self-powered speakers.

 

[Bastianpp]

My speakers are passive, i can move the volume with bouth, dac out and pre out
but the pre out can sound really loud, like 30 or 40 steps of difference between both

 

[raoultrifan]

hello
im using my pc -> cv2+ -> nad c355 -> speakers, what's the difference between pre out and dac out? pre out sound more loud
Ty

Both DAC-Out and Pre-Out have their volume adjustable from the same knob. DAC-Out has a max. output level a bit higher than 3V RMS, while Pre-Out has over 10V RMS.
Dac-Out has a lower background noise, so I recommend you to use this one to connect it to the amplifier (around 72% is the 2V RMS, so don't pass this volume reading).
You might find some more details on my review; link's on previous page.

 

[Bastianpp]

what happen if i pass 72%? for my luck i'm at 50 - 65 now xD

 

[raoultrifan]

Well, your external amplifier might not like an input voltage higher than 2V RMS, but you can double check this by reading amp's datasheet. Usually you don't need more than 2V RMS to "attack" an external amplifier, so this is why I recommend you to not pass the 72 marking if connected to DAC-Out of the CV2+.

 

[Bastianpp]

here is the datasheet of my amp http://www.bm.rs/Oglasi/NAD-355BEE.pdf
can you tell me please if 2 or 3 vrms is better?, i'm already has been using the dac out in 99 all the time xD


the datasheet said '' Maximum input signal 6V '', so if i put 3vrms or 2vrms it's pretty fine.. also i can use the pre amp but only at 60 or something like that? XD

 

[raoultrifan]

" Input sensitivity (rated output into 8 Ω) 940mV ", so even with 1V this amp will have enough juice. As I don't see a max. input sensitivity for the power amp and with 0.94V this amp can get to it's max. potential @8Ohms, I still think that passing 2V RMS makes no sense.

 

[Bastianpp]

Thank you !
I will test if i have better sound quality result turn up the volume in the amp and set at 72 the burson

The burson at 33-50 it's something like 1vrms i think, but i need to push volume so much and speaker doesn't get louder XDD i think 72 suit much better..

 

[Dogmatrix]

Thank you !
I will test if i have better sound quality result turn up the volume in the amp and set at 72 the burson

The burson at 33-50 it's something like 1vrms i think, but i need to push volume so much and speaker doesn't get louder XDD i think 72 suit much better..

Experimenting with this is very safe you will hear very obvious distortion when you overdrive the amp long before any damage to components could occur

 

[raoultrifan]

At 99% the CV2+ will have at DAC-out voltage a bit over 3V RMS, so probably the input stage of the connected external amplifier will start to distort.

Important thing is to not pass over 55% on the CV2+ if the amplifier is connected to PRE-out, because at 99% it will deliver over 10V RMS and most amplifiers are compatible with "line-level" input sensitivity (usually between 0.7 and 2.2V RMS). The PRE-out should only be used in studio environments or by people that really need a higher amplification for the I/II analogue inputs (or int special applications, different than our domestic Hi-Fi equipment).

 

[Bastianpp]

in dac out i don't hear any distortion at 72 or 99, but at the same voltage the pre out and dac out should sound the same ?

 

[raoultrifan]

With regular line-level external amplifiers just use DAC-out and try not passing the 72 marking on CV2+.
Do not search for the best sound to your ears, try digging the specs a bit more and don't overdrive your external amplifier's input stage.

 

[raoultrifan]

in dac out i don't hear any distortion at 72 or 99, but at the same voltage the pre out and dac out should sound the same ?

At the exact same voltage of 2V RMS (about 72 marking on DAC-out and around 55 marking on PRE-out) the background noise on PRE-out will be a bit higher. This is very easy to compare if you have sensitive 4-Ohms speakers and a very low-noise external amplifier (e.g.: Direct input). You will notice a slightly hiss when PRE-out is connected vs. the DAC-out.

However, the THD will be better on PRE-out, while THD+N will be slightly better on DAC-out relative to 2V RMS (due to the higher noise from PRE-out). The slight increase in noise from PRE-out is normal, due to a 5-6 times more amplification than DAC-out, so this is not a lowlight, it's actually a highlight.

 

[dfarina]

I have had a couple days to play with my V2+ with my LCD-2 pre fazor cans.Im finding the Dac section to be a little to cold and sterile,maybe I’m just not used to this much detail but it’s just not enjoyable to me.Using the amp section with my modi multibit gives me a better listen,smoother and more pleasant on the ears.I will go back and forth over the next week,hoping I can convince myself the v2+ Dac sounds better so I can go with my intended plan of having a simple all in one box,but at this stage it’s not looking that way.