Head-Fi.org › Forums › Equipment Forums › Portable Headphone Amps › VentureCraft Go-Dap GD-04 for iPhone 4
New Posts  All Forums:Forum Nav:

VentureCraft Go-Dap GD-04 for iPhone 4 - Page 7

post #91 of 161

I was searching around for any reviews of the Go-DAP 4.0 and stumbled across this:

 

http://www.youtube.com/watch?v=gVvmYK0XueM

 

I am a little surprised by his conclusions since I've heard nothing but good feedback for the unit here at head-fi.  Of course, I have never heard of this guy either, so I have no idea if he is credible.  Would anyone care to comment?

post #92 of 161
Quote:
Originally Posted by brumma View Post

I was searching around for any reviews of the Go-DAP 4.0 and stumbled across this:

 

http://www.youtube.com/watch?v=gVvmYK0XueM

 

I am a little surprised by his conclusions since I've heard nothing but good feedback for the unit here at head-fi.  Of course, I have never heard of this guy either, so I have no idea if he is credible.  Would anyone care to comment?

I did smily_headphones1.gif. I commented back on Snazzy's YouTube a month back. I've had at least 4xGo-DAPs in my hands in the past 9 mths in various OpAmp combinations. I disagree with his opinion about the SQ & bass. But I do agree with him about the battery.
post #93 of 161

I really like the Go-DAP 4, but I feel, too, that the SPDIF output is done poorly. I get that Venturecraft have a certain sound to output, but it is quite different to the older Go-DAP, warmer and rolled off in the highs rather than the lows as the old one was. Anyway, I've written a comparison (heavily weighted I'll admit, but one I feel is 'fair' considering both the CLAS and Unit 4.0 claim SPDIF output) at TouchMyapps. There is nothing like the Unit 4.0 apart from the older Go-DAP. To be honest, from the headphone amp output, I prefer the older unit though the newer one with OPA2134 is nice.

post #94 of 161
Shigzeo, thanks for the writeup.

I've decided against the Unit 4.0 because of future-compatibility concerns.

I've decided against the CLAS because of size (I don't want to carry both a CLAS and amp.)

So I'm waiting for the Go-Dap X unit and will try that against the HP-P1 and will make my decision then.
post #95 of 161

The GoDAP X seems interesting as it works from computer and from iDevice. Will have compromises to be sure, but comes at a great price.

post #96 of 161
Quote:
Originally Posted by AnakChan View Post


I did smily_headphones1.gif. I commented back on Snazzy's YouTube a month back. I've had at least 4xGo-DAPs in my hands in the past 9 mths in various OpAmp combinations. I disagree with his opinion about the SQ & bass. But I do agree with him about the battery.

 

I didn't read through all of the posts on his YouTube page, but I will now.  Is that where you commented?

 

Quote:
Originally Posted by gkanai View Post

I've decided against the Unit 4.0 because of future-compatibility concerns.

 

Why not just keep your iPhone 4 after you upgrade to the iPhone 5 and use it as a dedicated DAP?  That's what I plan to do.  It would mean more free space for music too.

post #97 of 161

AnakChan & shigzeo, do you guys think that the audio quality is enough of an improvement over the built-in headphone out of the iPhone 4 to warrant a purchase for use as an amp only?  In other words, is it worth it if I never plan to use the optical out?  My headphones and IEMs are pretty easy to drive, and I only rarely plug my iPhone into the stereo.

post #98 of 161
Quote:
Originally Posted by brumma View Post

AnakChan & shigzeo, do you guys think that the audio quality is enough of an improvement over the built-in headphone out of the iPhone 4 to warrant a purchase for use as an amp only?  In other words, is it worth it if I never plan to use the optical out?  My headphones and IEMs are pretty easy to drive, and I only rarely plug my iPhone into the stereo.

 

Just a point of clarification, the optical out is when you want to use the iPhone purely as a transport to an external DAC/Amp. The other use is to use the Go-DAP as a DAC+Amp-combined. In other words you cannot use the Go-DAP as an Amp-only, or as a DAC-only.

 

So if you don't care about the optical out (e.g. like me, I never use the Optical out for listening, more for testing which it's clearly isn't its forte), then using the Go-DAP as a DAC+Amp is to me a clear improvement over straight out of the iPhone 4/S.

post #99 of 161

Shigzeo borrowed my unit. It is plenty power for headphones more than the regular iPhone. He says for IEM earphones it isnt as good as iPhone is normal but I disagree. The sound is so much rich and smoother and beautiful than the regular iPhone. Maybe you like smooth warm sound which shigzeo doesnt care about for but if your like me and love that sound then you love this I guarantee it. Shigzeo cares about audiophile benchmark and all this signal stuffs and I care all about the sound and that it.

post #100 of 161

Thank, gents.  That clarifies things a bit for me.  

 

AnakChan, I've read your write-ups on your upgraded units, but couldn't find any info from you on the OPA2134.  Did you post anything and, if so, can you point me in the right direction?  I have to admit that I am still confused by all of the different amp upgrade options and the sound qualities of each.  Would you recommend getting the DAC & Gain upgrades with the standard OPA2134, or are they only meant to be coupled with the upgraded amps?

post #101 of 161
Quote:
Originally Posted by brumma View Post

Thank, gents.  That clarifies things a bit for me.  

 

AnakChan, I've read your write-ups on your upgraded units, but couldn't find any info from you on the OPA2134.  Did you post anything and, if so, can you point me in the right direction?  I have to admit that I am still confused by all of the different amp upgrade options and the sound qualities of each.  Would you recommend getting the DAC & Gain upgrades with the standard OPA2134, or are they only meant to be coupled with the upgraded amps?

Unfortunately I didn't upgrade in stages, I did everything in one hit - the DAC/Gain, and the Op Amp. I think the sound differences I hear are primarily on the OpAmp upgrade but whether the other component upgrades help to make the OpAmp differences more obvious, I'm not certain. When I was talking to VentureCraft, they were talking about those upgrades "opening up" the OpAmp more (I have to be honest I don't really know what that means).

 

If I had to do it all over again and if had to choose only 1 component to upgrade, I'd probably pick the OpAmp, but ideally do all 3.

 

I didn't write much about the OPA2134 as I had it only for a brief period of time (Oct -> Nov '11), but had the AD8397 for a much longer period. I've tried the OPA1612 for just over 6 weeks now. takoyaki wrote briefly about the OPA2134 :-

http://www.head-fi.org/t/533084/venturecraft-go-dap-gd-04-for-iphone-4/45#post_7872045

post #102 of 161

What makes the choice of another opamp an "upgrade"?  Are the other opamps generally regarded as being better quality / sound, or is it really just a matter of taste?  I am a newbie, wannabe audiophile, and am still trying to sort through all of the terminology so I am going to ask for a bit of advice...

 

I mostly listen to rock in it's various forms, as well as a bit of jazz.  My headphones are Audio Technica ATH-ESW9, Bowers & Wilkins P5, and Audéo PFE-112.  I also own a pair of ATH-M50s, but am looking to sell them.  I am rather sensitive to sibilance, but don't like too much treble roll-off.  I'm not sure how to express my midrange preferences.  My only reference is what I've heard of "scooped" sounding headphones / EQ--I'm not a fan, so maybe you can draw conclusions from that.  I prefer bass to be tight and punchy, without any mid-bass bloom.  Do any one of these particular opamps work better than the others for this combination of tastes?

post #103 of 161

From VentureCraft themselves since the Go-DAPs are mostly sold as their base models OPA2134 & Muses 8820E. If you want to have the AD8397, OP-275, or OPA-2604, you'll have to send back your Go-DAP OPA2134/8820E back to them (and pay a fee) for that OpAmp upgrade. There were some limited Go-DAPs that were sold on the shelf with those OpAmps, but I believe the retail stores requested VentureCraft to make those specially for them - as such limited.

 

The term "Upgrade" from an SQ perspective, IMHO, could still apply going from OPA2134/8820E to the AD8397/OPA1612 'cos of the improvement to the extensions in bass/treble, & the improvement in clarity/detail. As one may say if they could "upgrade" the sound of the iPhone by adding an external DAC/Amp.

 

I think if you're sensitive to sibilance, I think it's better controlled by the choice of headphones rather than by the OpAmps. At least in the Go-DAP implementation of various OpAmps, the changes are slight in comparison to the headphones. I'm not familiar with most of the headphones you have but have heard the B&W P5 (which to me are dark for my tastes). Whether you're opting the base Go-DAP 8820E vs say the AD8397 or OPA1612, the treble extensions of the latter OpAmp isn't going to make the B&W P5 dramatically sibilant. You'll hear the differences but more subtly.

post #104 of 161
Quote:
Originally Posted by AnakChan View Post

From VentureCraft themselves since the Go-DAPs are mostly sold as their base models OPA2134 & Muses 8820E. If you want to have the AD8397, OP-275, or OPA-2604, you'll have to send back your Go-DAP OPA2134/8820E back to them (and pay a fee) for that OpAmp upgrade. There were some limited Go-DAPs that were sold on the shelf with those OpAmps, but I believe the retail stores requested VentureCraft to make those specially for them - as such limited.

 

The term "Upgrade" from an SQ perspective, IMHO, could still apply going from OPA2134/8820E to the AD8397/OPA1612 'cos of the improvement to the extensions in bass/treble, & the improvement in clarity/detail. As one may say if they could "upgrade" the sound of the iPhone by adding an external DAC/Amp.

 

I think if you're sensitive to sibilance, I think it's better controlled by the choice of headphones rather than by the OpAmps. At least in the Go-DAP implementation of various OpAmps, the changes are slight in comparison to the headphones. I'm not familiar with most of the headphones you have but have heard the B&W P5 (which to me are dark for my tastes). Whether you're opting the base Go-DAP 8820E vs say the AD8397 or OPA1612, the treble extensions of the latter OpAmp isn't going to make the B&W P5 dramatically sibilant. You'll hear the differences but more subtly.

 

As a first-time buyer, I assume I can order a new unit that already has the upgrades installed for the additional cost, correct?  I believe you mentioned that the AD8397 was your favorite opamp--what makes you prefer it over the others?  Is it the extension to the bass/treble you mentioned?  Just to clarify, what is meant by the term "extension"?  Do you mean that there is less roll-off and it is actually hitting higher and lower frequencies?  Sorry for so many questions.

post #105 of 161
Quote:
Originally Posted by brumma View Post

 

As a first-time buyer, I assume I can order a new unit that already has the upgrades installed for the additional cost, correct?  I believe you mentioned that the AD8397 was your favorite opamp--what makes you prefer it over the others?  Is it the extension to the bass/treble you mentioned?  Just to clarify, what is meant by the term "extension"?  Do you mean that there is less roll-off and it is actually hitting higher and lower frequencies?  Sorry for so many questions.


So if you want to have anything other than the Burr Brown OPA2134 (http://venturecraft.jp/gadget_en/gd04_buy.php), then you'll need to mail VentureCraft for a customised order. They will then tell you the price of the customised Go-DAP 4.0.

 

 

 

Have a read on post #55 about my comments for my preference of the AD8397. My definition of extension is that I can hear the highs and lows more easily. Whether that means in the frequency chart if the dB's are higher at those frequencies, I'm not entirely certain - but I think that to be the case.

New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Portable Headphone Amps
Head-Fi.org › Forums › Equipment Forums › Portable Headphone Amps › VentureCraft Go-Dap GD-04 for iPhone 4