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| Headphone Amps (full-size) Discussion of desktop headphone amps. |
01-31-2008, 03:22 PM
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1000+ Head-Fi'er
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Join Date: Aug 2006
Location: Sweden
Posts: 1,035
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Just got the Zero.
First impression is that it sounds really good 
One "problem" though, is it possible to lower the gain a bit by hand? As it is now, I have the volume as low as possible without the channel imbalance to kick in, and with the ms2i, the volume is now 70-75dB. I would rather have it so that I can listen at 55-60dB the lowest. This is with Zeros amp and dac.
EDIT: With the 32ohm dt990 05, the volume is about 78dB at the lowest possible.
__________________
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H X-fi XtremeMusic -> ASIO -> Optical -> Gamma2 / Zero dac (OPA-Earth) -> CK2III / Zero internal amp -> RS1 "brown headband" / HD600 '02 / K501 .v1 / HF-2
P Cowon D2 - Head-Direct RE0
Other Fiio portable amp / Playstation SCHP-1002
Gone: DT990 '05 32ohm, HD650 with Oehlbach cable / Meier Corda Headfive / MS2i / DT880 '05 250ohm / RS1 "buttonless" '08 / LD MKIII / Audio-Technica ATH-AD2000
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Spotify
Last edited by Henmyr; 01-31-2008 at 03:26 PM.
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01-31-2008, 03:27 PM
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Headphoneus Supremus
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Join Date: Oct 2006
Location: Arizona
Posts: 3,262
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Quote:
Originally Posted by Henmyr
Just got the Zero.
First impression is that it sounds really good
One "problem" though, is it possible to lower the gain a bit by hand? As it is now, I have the volume as low as possible without the channel imbalance to kick in, and with the ms2i, the volume is now 70-75dB. I would rather have it so that I can listen at 55-60dB the lowest. This is with Zeros amp and dac. |
Not that I know of, but can you back down the source? If not, maybe Lawrence can advise you on how to do it internally?
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01-31-2008, 03:38 PM
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1000+ Head-Fi'er
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Join Date: Aug 2006
Location: Sweden
Posts: 1,035
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Quote:
Originally Posted by Penchum
Not that I know of, but can you back down the source? If not, maybe Lawrence can advise you on how to do it internally?
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I'm using x-fi -> asio-> optical -> zero. If I lower the volume in foobar, wont the quality be lowered?
Even the DT880 250ohm is around 76dB the lowest.
__________________
_____________________________________________
H X-fi XtremeMusic -> ASIO -> Optical -> Gamma2 / Zero dac (OPA-Earth) -> CK2III / Zero internal amp -> RS1 "brown headband" / HD600 '02 / K501 .v1 / HF-2
P Cowon D2 - Head-Direct RE0
Other Fiio portable amp / Playstation SCHP-1002
Gone: DT990 '05 32ohm, HD650 with Oehlbach cable / Meier Corda Headfive / MS2i / DT880 '05 250ohm / RS1 "buttonless" '08 / LD MKIII / Audio-Technica ATH-AD2000
------------------------------------------------
Spotify
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01-31-2008, 03:52 PM
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Headphoneus Supremus
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Join Date: Oct 2006
Location: Arizona
Posts: 3,262
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Quote:
Originally Posted by Henmyr
I'm using x-fi -> asio-> optical -> zero. If I lower the volume in foobar, wont the quality be lowered?
Even the DT880 250ohm is around 76dB the lowest.
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In XP, I think that is true. I know there is postings about it, but I read them long enough ago that I have forgotten!  Someone had posted not too long ago that the gain decreases during burn-in as well. This was on the units newer than mine, so I can't verify it for you. Let me know anything you find out or experience, please? I'm interested to find out as well.
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01-31-2008, 04:33 PM
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100+ Head-Fi'er
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Join Date: Dec 2005
Location: Sweden
Posts: 209
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this is my first impressions, i only have had a few hours with the zero. I think it sounds very good! the built in amp is very good, i think the midrange is more present than on my DV. I don't have to use dual LT Opamps in the dac section but in headphone amp? and those red ( idon't know what it is called) that are marked on the pic is'nt same. are they lower quality?
__________________
Phones: HD650, HD485
Source: M-Audio 192, Zero Dac, Constantine+
Amp: DV332 (CV4010, Ulys 6S19P-V
Gone: HD595, DV336i
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01-31-2008, 05:09 PM
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Headphoneus Supremus
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Join Date: Oct 2006
Location: Arizona
Posts: 3,262
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Quote:
Originally Posted by davve
this is my first impressions, i only have had a few hours with the zero. I think it sounds very good! the built in amp is very good, i think the midrange is more present than on my DV. I don't have to use dual LT Opamps in the dac section but in headphone amp? and those red ( idon't know what it is called) that are marked on the pic is'nt same. are they lower quality?
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Ok, this is my bad. I'll try to explain a little better. There are single Opamps (like the OPA627) that require two of them on an adapter to work in a dual Opamp's socket. The Zero uses dual Opamps (like the LT1364) both in the DAC and Headphone amp. The LT's you have are "dual" Opamps and require no adapter anywhere in the Zero.
Are you talking about the red boxes to the left of the Opamp in the pic?
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01-31-2008, 05:22 PM
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100+ Head-Fi'er
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Join Date: Dec 2005
Location: Sweden
Posts: 209
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Quote:
Originally Posted by Penchum
Ok, this is my bad. I'll try to explain a little better. There are single Opamps (like the OPA627) that require two of them on an adapter to work in a dual Opamp's socket. The Zero uses dual Opamps (like the LT1364) both in the DAC and Headphone amp. The LT's you have are "dual" Opamps and require no adapter anywhere in the Zero.
Are you talking about the red boxes to the left of the Opamp in the pic?
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yes the red boxes, haven't seen those before in the zero. but in the headphone amp there are two opamps? so i need two there?
__________________
Phones: HD650, HD485
Source: M-Audio 192, Zero Dac, Constantine+
Amp: DV332 (CV4010, Ulys 6S19P-V
Gone: HD595, DV336i
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01-31-2008, 05:25 PM
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Headphoneus Supremus
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Join Date: Oct 2006
Location: Arizona
Posts: 3,262
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Quote:
Originally Posted by davve
yes the red boxes, haven't seen those before in the zero. but in the headphone amp there are two opamps? so i need two there?
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Correct. One for each channel, L&R.
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01-31-2008, 05:30 PM
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Headphoneus Supremus
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Join Date: Oct 2006
Location: Arizona
Posts: 3,262
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Quote:
Originally Posted by Penchum
Correct. One for each channel, L&R. |
Yours seems to be an updated version! What other changes have you noticed?
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01-31-2008, 05:33 PM
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100+ Head-Fi'er
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Join Date: Jan 2008
Posts: 157
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Quote:
Originally Posted by Penchum
Your Audigy 2 ZS has coaxial out from the flexi-jack (top one) on the back, correct?
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Yeah, I think it has but Im probably going to upgrade to XtremeMusic.
[Solved]
Anyway, I looked at ebay and I didnt see any Zero DAC`s for sale. 
Last edited by Clok; 01-31-2008 at 06:09 PM.
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01-31-2008, 05:44 PM
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100+ Head-Fi'er
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Join Date: Dec 2005
Location: Sweden
Posts: 209
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Quote:
Originally Posted by Penchum
Correct. One for each channel, L&R. |
Okey didn't think on that becouse i only ordered one LT1361 and 1469 
the metal chip/processor in the middle or what it is, on mine its texted VX-8111 49.1520 Mhz
whats the diffrence between 1361CN8 and 1361CN8#PBF
here you go!
ZERO 24/192 DAC D A CONVERTOR , HEAD FI AMP , BRAND NEW - eBay (item 330207889454 end time Feb-04-08 00:28:28 PST)
__________________
Phones: HD650, HD485
Source: M-Audio 192, Zero Dac, Constantine+
Amp: DV332 (CV4010, Ulys 6S19P-V
Gone: HD595, DV336i
Last edited by davve; 01-31-2008 at 05:55 PM.
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01-31-2008, 05:49 PM
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100+ Head-Fi'er
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Join Date: Jan 2008
Posts: 157
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Thanks.
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01-31-2008, 05:54 PM
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Headphoneus Supremus
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Join Date: Oct 2006
Location: Arizona
Posts: 3,262
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Quote:
Originally Posted by davve
Okey didn't think on that becouse i only ordered one LT1361
the metal chip/processor in the middle or what it is, on mine its texted VX-8111 49.1520 Mhz |
No problem. Yours has two big red boxes, mine has two big yellow boxes. 
I don't think it matters much.
What do you have for an Opamp inventory?
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01-31-2008, 06:05 PM
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Head-Fi'er
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Join Date: Jan 2008
Location: Germany
Posts: 80
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Quote:
Originally Posted by davve
and those red ( idon't know what it is called) that are marked on the pic is'nt same. are they lower quality?
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These are 12V relays. The decoded signal is switched between Phones amplifier and Preamp output.
Quote:
Originally Posted by davve
the metal chip/processor in the middle or what it is, on mine its texted VX-8111 49.1520 Mhz
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This is a quartz crystal oscillator which feeds the DAC (and the receiver chip) on the bottom side of the circuit board. The different numbers could be production day/week or a related number.
Yes... the Zero has a bottom side, but no pictures yet. After burn-in I'll take two or three.
Last edited by kmel; 01-31-2008 at 06:51 PM.
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01-31-2008, 06:05 PM
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100+ Head-Fi'er
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Join Date: Dec 2005
Location: Sweden
Posts: 209
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Quote:
Originally Posted by Penchum
No problem. Yours has two big red boxes, mine has two big yellow boxes.
I don't think it matters much.
What do you have for an Opamp inventory? |
Okay can you help me out wich i can use in hp amp and dac.
I have one 1361CN8, one 1361CN8#PBF, one 1469IN8#PBF, two 1364CN8#PBF. some is named CN8 and IN8 whats the diffrent if gonna order i want the hole name becouse there seems to be diffrence.
__________________
Phones: HD650, HD485
Source: M-Audio 192, Zero Dac, Constantine+
Amp: DV332 (CV4010, Ulys 6S19P-V
Gone: HD595, DV336i
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