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| Headphone Amps (full-size) Discussion of desktop headphone amps. |
02-13-2008, 03:37 AM
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100+ Head-Fi'er
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Join Date: Oct 2007
Location: Deep South Texas
Posts: 139
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Looks good as WU has the OPA627 BP for $11 each while lawrence lists the OPA627 BP (single, ceramic) for $28 each! I assume they are both the same (BP) and ceramic in nature. With a browndog ($3) that makes it about $25 + shipping versus Lawrence's price of $61 shipped. Both from Hong Kong. 
I like Lawrence and would like to do business with him but George Washington(s) are nice too!! 
The browndog I reference is this one: Single-to-dual Op-AMP Adapter - DIP version (p/n 021001) - 021001 Is this the correct one to use? or was there another recommended? I seem to recall an alternative adaptor being mentioned that saved space (?).
__________________
Go ahead, follow that "Yellow Brick Road"... 'cause no matter where you go there you are.
Foobar2K (KS/FLAC)-> AV-710 (coax)-> COMPASS Dac/Amp (Earth HDAM in DAC)-> Gilmore Lite/DPS-> Senn HD650
Portable: Cowon D2 > CrossRoads MylarOne Ruby x3i
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02-13-2008, 03:42 AM
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100+ Head-Fi'er
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Join Date: Oct 2007
Location: Deep South Texas
Posts: 139
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Hey! I noticed that on the front page of Cimmaron (browndog) they state that:
"COMING SOON! - Pre-mounted OPA627 op-amp on either 970601S or 020302S adapters."
Cimarron Technology, Inc.
I will email them and ask when and how much! May be worth the wait and not have to order from 2 places. 
__________________
Go ahead, follow that "Yellow Brick Road"... 'cause no matter where you go there you are.
Foobar2K (KS/FLAC)-> AV-710 (coax)-> COMPASS Dac/Amp (Earth HDAM in DAC)-> Gilmore Lite/DPS-> Senn HD650
Portable: Cowon D2 > CrossRoads MylarOne Ruby x3i
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02-13-2008, 04:23 AM
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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 giant77
I was going to order from Wu the OPA627 after their New Year diykits |
Wu has nice prices, but the OPA627AM is in a TO99 package:  , only the OPA627BP is PDIP.
So you have to buy some kind of adapter. I like this one: OPA627AU Adapter.
Edit: Check out edguetzow's post... Cimarron has these adapters too.
What are the musical and audible differences between OPA627 A and B? Anyone?
The OPA637 isn't Unity-Gain Stable.
@Penchum: Does the Zero handle a gain greater/equal 5?
Last edited by kmel; 02-13-2008 at 04:41 AM.
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02-13-2008, 04:45 AM
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100+ Head-Fi'er
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Join Date: Oct 2007
Location: Deep South Texas
Posts: 139
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Looks good but the price comes to about $60 US. Similar to Lawrence's price although it looks nice and compact in design. Not much else right now on ebay.
__________________
Go ahead, follow that "Yellow Brick Road"... 'cause no matter where you go there you are.
Foobar2K (KS/FLAC)-> AV-710 (coax)-> COMPASS Dac/Amp (Earth HDAM in DAC)-> Gilmore Lite/DPS-> Senn HD650
Portable: Cowon D2 > CrossRoads MylarOne Ruby x3i
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02-13-2008, 05:20 AM
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Head-Fi'er
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Join Date: Jan 2008
Location: Germany
Posts: 80
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02-13-2008, 06:43 AM
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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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diykits didn't have any OPA627BP a few days ago, but they did however have OPA627AP for $8, of which I ordered two.
__________________
_____________________________________________
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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02-13-2008, 06:43 AM
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Member of the Trade:
Oritek Audio
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Join Date: Oct 2005
Location: San Jose, California
Posts: 665
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Quote:
Originally Posted by kmel
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A bit pricey for a discrete opamp. You can find hermetically sealed quality units around $30 used, but the question is how to fit them in the space. Burson solved that problem for you.
__________________
I hear - therefore I am!
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02-13-2008, 07:08 AM
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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 Henmyr
diykits didn't have any OPA627BP a few days ago, but they did however have OPA627AP for $8, of which I ordered two.
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Hmm.... right now I ordered one of these "OPA627AU Adapter" for $38 shipped.
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02-13-2008, 10:15 AM
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1000+ Head-Fi'er
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Join Date: Dec 2007
Location: Manchester
Posts: 1,070
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Quote:
Originally Posted by kmel
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Can you literally just swap your dual op amps for one of thes babies and it will be an instant upgrade?
Or do the only work in certain designs? Im thinking for my zero dac.
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02-13-2008, 01:54 PM
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Head-Fi'er
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Join Date: Sep 2007
Location: dabronx
Posts: 90
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Dave,
Much thanXs for you most excellent review. And much thanXs for "discovering" this lovely product.
I've been looking for something like this, and tripped over your post - Hey luck got strike me sometimes, right ;-)
Looks like my next stop is EBay!
Again much thanXs,
angel
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02-13-2008, 01:58 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 kmel
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Those look yummy!
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02-13-2008, 02:09 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 ammatos
Dave,
Much thanXs for you most excellent review. And much thanXs for "discovering" this lovely product.
I've been looking for something like this, and tripped over your post - Hey luck got strike me sometimes, right ;-)
Looks like my next stop is EBay!
Again much thanXs,
angel
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Thanks for the kind words!
Have a good one!
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02-13-2008, 02:11 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 fault151
Can you literally just swap your dual op amps for one of thes babies and it will be an instant upgrade?
Or do the only work in certain designs? Im thinking for my zero dac.
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It was listed as a direct replacement for the OPA2604, so it seems so!
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02-13-2008, 02:15 PM
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100+ Head-Fi'er
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Join Date: Nov 2006
Location: Mansester, Finland
Posts: 423
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I got OPA627 AP's from Lawrence, not BP's. I'm still waiting for his answer about the broken op-amp and damaged DY2000.
I have right now 2xLT1028 with Browndog in the DAC burning in. They get pretty hot, but the LT1361's in the headamp are only warm.
__________________
X-Fi --> Zhaolu 2.5A (Zapfiltered) --> Audioquest King Cobra XLR --> Audio-gd C2C (Discrete Dual Mono SS) --> Grado HF-2 #419
Owned: Corda Headfive #483, Heed Canamp, Darkvoice Figaro, Zero DAC, K701, SA5000, SR-225, Yamaha YH-1 "Chocolate Donut", K500, K340, Little Dot I+, MKIV SE, Grado RS-2, RS-1, Alessandro MS-Pro. Denon AH-MD5000
My Feedback
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02-13-2008, 02:39 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 Seba
I got OPA627 AP's from Lawrence, not BP's. I'm still waiting for his answer about the broken op-amp and damaged DY2000.
I have right now 2xLT1028 with Browndog in the DAC burning in. They get pretty hot, but the LT1361's in the headamp are only warm.
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How do they sound?
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