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| Computer Audio Discussion of computers as source components, sound cards, USB DACs, media servers, etc. |
01-20-2008, 04:59 PM
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Head-Fi'er
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Join Date: Dec 2007
Location: Canada
Posts: 56
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prelude with opa627 opamp
I was listening to my friends pc rig the other day and couldn't believe what I was hearing. He has the auzentech x-fi prelude with modded burr- brown opa627 opamp. Simply put, his setup rivals my uncle's Wadia 581 cd player. I was wondering if anyone has had a similar experience?
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01-20-2008, 05:48 PM
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Headphoneus Supremus
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Join Date: Aug 2005
Posts: 2,858
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Well the Prelude are top quality cards. They can rival other gear. The 627 opamps are nice but very pricey about $15 per single channel. So $15 X 2 for stereo then a brown dog or other adapter-well you get the picture...quite pricey. Very nice sounding though.
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01-22-2008, 12:19 AM
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Head-Fi'er
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Join Date: Nov 2007
Location: Bucarest
Posts: 53
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aha
i have to - a prelude - and is incredible - compared with 0404 usb 2.0 and many other source .
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01-22-2008, 01:00 AM
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1000+ Head-Fi'er
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Join Date: Jun 2003
Posts: 1,088
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I am hearing marvelous comments on this sound card. I think will be in my next purchase. This sound card dethroned a friend's DAC /AMP setup, that I wont mention here, for some ethical reasons.
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01-22-2008, 02:12 AM
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Head-Fi'er
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Join Date: Nov 2007
Location: Bucarest
Posts: 53
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AHA
Is Incredible - Only In Bit Perfect -
In Resampling Mode - Is Not
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01-22-2008, 02:48 AM
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100+ Head-Fi'er
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Join Date: Jan 2008
Posts: 195
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yea the preludes are good...
it already come with the LM4562NA which is a very good quality one... made for audio 
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01-22-2008, 03:25 AM
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1000+ Head-Fi'er
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Join Date: Jul 2007
Location: Australia
Posts: 1,041
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Prelude + OPA627 sets , but in bit perfect mode? so you're basically using the card as transport only? what's the point changing the opamps?
__________________
"Visually everything here is imperfect, but sonically they're mesmerizing"
Head-Fi Feedbacks
Portable rig iMod Photo → Xin SMIII V6 (2x BUF634 + 2x OPA627) → Yuin PK-1
Home rig X-FI Xtrememusic (as transport) → BJC Coax → OMZ v4.1 → VanDeHul "The Name" IC → Lisa III XP → AKG K701 (w SAA Equinox) / Denon D2000
Current sources: iMod Photo, iRiver IFP-180TC, Sony D-EJ925, & OMZ v4.1 DAC
Current cans: DENON D2000, AKG K701, Yuin PK-1, Etymotic ER6i, Alessandro MS-1, Sennheiser MX500, Koss UR-30 & KSC-55
Current amps: Yamaha Natural Sound Stereo Amp A-420, Xin Supermacro III V6, & LISA III XP
Current speakers: Klipsch Promedia satellite speakers + Megaworks Subwoofer
Wish list: Stax rigs, Darth beyer, Xin Reference, Tube Amp, Ultrasone Edition 9 & Balanced rigs
Gone but not forgotten: Heed Canamp, iBasso D1
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01-22-2008, 08:14 AM
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500+ Head-Fi'er
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Join Date: Feb 2004
Posts: 993
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I don't have the prelude but I have a card built off the same Oxygen hd CMI8788 of the Prelude, the Razer Barracuda AC-1. Basically it's lacking EAX, gold everything, and easy swapping of opamps.
Very impressive soundcard compared to the 0404 pci and x-fi platinum I've owned. I was wondering the other day if the Prelude would be an actual worthwhile upgrade for me or maybe even the x-fi elite, it's too bad the Barracuda has gotten such a bad rep for being a Razer branded product ~ I think the resell value has tanked for this particular card.
Then again I just want a kickass DAC!
__________________
Team leader of "car got broken into and lost my Micro Dac + HF-1" club
My Feedback
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01-22-2008, 10:47 AM
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Head-Fi'er
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Join Date: Nov 2007
Location: Bucarest
Posts: 53
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aha
"Prelude + OPA627 sets , but in bit perfect mode? so you're basically using the card as transport only? what's the point changing the opamps?
"
yes - like a dac - not with x-fi procesor "resampling" - and the op-amp in analog out - make a big difference .
op-amp is a analog component - and ak4596 is the dac .
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01-22-2008, 11:00 AM
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Head-Fi'er
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Join Date: Dec 2006
Posts: 65
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I'm loving my prelude, just got it. I need to find some way to get rid of the high pitched squeel I get when listening through headphones though. really ruins the experience and swapping pci slots hasn't done anything.
really great card though, hope to solve this problem soon.
__________________
UltraPortable "Workout": 190 KBPS VBR -> Sansa Clip -> JVC Marshmallows
TransPortable: FLAC -> Cowon iAudio X5L (Rockboxed) -> Grado SR-80s
Home: FLAC -> Foobar2000 -> Auzentech Asio-> Auzentech X-Fi Prelude -> Grado SR-80s
DAPs: Cowon iAudio X5L 30GB, iPod Nano 3G 8GB, iPod Nano 1G 2GB, Sansa Clip 2GB
playin the sig rig game though I have work to do :D
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01-22-2008, 03:11 PM
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Headphoneus Supremus
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Join Date: Aug 2005
Posts: 2,858
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Quote:
Originally Posted by Mr.Sneis
I don't have the prelude but I have a card built off the same Oxygen hd CMI8788 of the Prelude, the Razer Barracuda AC-1. Basically it's lacking EAX, gold everything, and easy swapping of opamps.
Very impressive soundcard compared to the 0404 pci and x-fi platinum I've owned. I was wondering the other day if the Prelude would be an actual worthwhile upgrade for me or maybe even the x-fi elite, it's too bad the Barracuda has gotten such a bad rep for being a Razer branded product ~ I think the resell value has tanked for this particular card.
Then again I just want a kickass DAC!
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The Prelude doesn't use a 8788 Chipest. It uses a 20KX series (X-fi) processor. The X-Meridian from Auzen used the Oxygen chipset. Which is also a very nice sounding card. Those (8788) chipsets power some very decent cards. I know a few guys that dumped Razors for Prelude and they were very happy with the new Preludes. I am thinking of ordering some new high end amps for this card such as the OPA627's or 637's should kick the sound up a notch.. 
Last edited by ROBSCIX; 01-22-2008 at 03:14 PM.
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01-22-2008, 04:47 PM
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Head-Fi'er
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Join Date: Nov 2007
Location: Bucarest
Posts: 53
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aha
the op-amp lm4562 is very good .
the 627 is not worth the money for prelude .
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01-22-2008, 04:54 PM
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1000+ Head-Fi'er
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Join Date: Jul 2007
Location: Australia
Posts: 1,041
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Quote:
yes - like a dac - not with x-fi procesor "resampling" - and the op-amp in analog out - make a big difference .
op-amp is a analog component - and ak4596 is the dac .
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I don't understand.
Since you're using Bit-perfect through Digital output (optical/coax), your prelude just transformed into transport to other external DAC, what's the point changing opamps (eg. change to OPA627), since the DAC chip inside Prelude it self isn't used when prelude in transport mode? How this opamps affect the transport output quality?
__________________
"Visually everything here is imperfect, but sonically they're mesmerizing"
Head-Fi Feedbacks
Portable rig iMod Photo → Xin SMIII V6 (2x BUF634 + 2x OPA627) → Yuin PK-1
Home rig X-FI Xtrememusic (as transport) → BJC Coax → OMZ v4.1 → VanDeHul "The Name" IC → Lisa III XP → AKG K701 (w SAA Equinox) / Denon D2000
Current sources: iMod Photo, iRiver IFP-180TC, Sony D-EJ925, & OMZ v4.1 DAC
Current cans: DENON D2000, AKG K701, Yuin PK-1, Etymotic ER6i, Alessandro MS-1, Sennheiser MX500, Koss UR-30 & KSC-55
Current amps: Yamaha Natural Sound Stereo Amp A-420, Xin Supermacro III V6, & LISA III XP
Current speakers: Klipsch Promedia satellite speakers + Megaworks Subwoofer
Wish list: Stax rigs, Darth beyer, Xin Reference, Tube Amp, Ultrasone Edition 9 & Balanced rigs
Gone but not forgotten: Heed Canamp, iBasso D1
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01-22-2008, 05:22 PM
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Head-Fi'er
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Join Date: Nov 2007
Location: Bucarest
Posts: 53
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aha
you make a confusion ..
I don't understand.
Since you're using Bit-perfect through Digital output (optical/coax), your prelude just transformed into transport to other external DAC, what's the point changing opamps (eg. change to OPA627), since the DAC chip inside Prelude it self isn't used when prelude in transport mode? How this opamps affect the transport output quality?
no - no - not a "transport" - the bitrate of surce - is not upsampled - or resampled to ex: 48khz is left like it is
the dac is use in both case
dac = digital to analog converter - is a device for converting a digital code to an analog signal .
this is valid just in analog output
in digital output - is no difference - in case of prelude .
"like" asio
Audio Stream Input/Output - Wikipedia, the free encyclopedia
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01-22-2008, 05:36 PM
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1000+ Head-Fi'er
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Join Date: Jul 2007
Location: Australia
Posts: 1,041
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I think we totally misunderstood each other,
however, I'm about to emphasize your statement.
Quote:
Is Incredible - Only In Bit Perfect -
In Resampling Mode - Is Not
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Please explain this part.
__________________
"Visually everything here is imperfect, but sonically they're mesmerizing"
Head-Fi Feedbacks
Portable rig iMod Photo → Xin SMIII V6 (2x BUF634 + 2x OPA627) → Yuin PK-1
Home rig X-FI Xtrememusic (as transport) → BJC Coax → OMZ v4.1 → VanDeHul "The Name" IC → Lisa III XP → AKG K701 (w SAA Equinox) / Denon D2000
Current sources: iMod Photo, iRiver IFP-180TC, Sony D-EJ925, & OMZ v4.1 DAC
Current cans: DENON D2000, AKG K701, Yuin PK-1, Etymotic ER6i, Alessandro MS-1, Sennheiser MX500, Koss UR-30 & KSC-55
Current amps: Yamaha Natural Sound Stereo Amp A-420, Xin Supermacro III V6, & LISA III XP
Current speakers: Klipsch Promedia satellite speakers + Megaworks Subwoofer
Wish list: Stax rigs, Darth beyer, Xin Reference, Tube Amp, Ultrasone Edition 9 & Balanced rigs
Gone but not forgotten: Heed Canamp, iBasso D1
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