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LOVING my new amp (Objective2)

post #1 of 33
Thread Starter 

Hi ALL

 

(First time poster, long time lurker.)

 

I've just recently upgraded (from a CMOY) to this brilliant piece of electronics.

 

I just had to post SOMETHING, SOMEWHERE about the extreme joy I am having listening to music through this amp (which I've had for only a couple of days) with my Sennheiser HD600 cans.  I figured here would be better than facebook as you "get it" unlike they would!

 

It's now 4 am and it's the second night in a row that I don't want to go to sleep because I just want to keep listening to music through this gear :)

 

Sorry if this sounds like an ad (it's not!). I just had to shout out :)

 

Cheers, Glenn

Gear mentioned in this thread:

post #2 of 33
Mine arrived today from jds.
For what I hearing trought my hd 650 and my sony mdr ex1000 I completely agree with you.
I have two more expensive portable amps and I realized how threw my money.
Sent from my GT-N7000 using Tapatalk 2
Edited by gattari - 7/13/12 at 4:21pm
post #3 of 33
Quote:
Originally Posted by ghuth View Post

Hi ALL

 

(First time poster, long time lurker.)

 

I've just recently upgraded (from a CMOY) to this brilliant piece of electronics.

 

I just had to post SOMETHING, SOMEWHERE about the extreme joy I am having listening to music through this amp (which I've had for only a couple of days) with my Sennheiser HD600 cans.  I figured here would be better than facebook as you "get it" unlike they would!

 

It's now 4 am and it's the second night in a row that I don't want to go to sleep because I just want to keep listening to music through this gear :)

 

Sorry if this sounds like an ad (it's not!). I just had to shout out :)

 

Cheers, Glenn

"Welcome to headfi! Sorry about your wallet"

Glad that you are enjoying it! I am using it as well, it is a good amp for the price but sometimes and for some other genres it's a bit TOO clean in my opinion. Either way, I get exactly what you are feeling!

 

Hope you stay on in this community Glenn! We would be pleased to have you here.beerchug.gif

 

---Welcoming Post----

post #4 of 33

I'm still waiting on the desktop edition, I have no need for a portable amp that big!

post #5 of 33
Quote:
Originally Posted by DaBomb77766 View Post

I'm still waiting on the desktop edition, I have no need for a portable amp that big!

That's why I have a custom built desktop variant with a Burr Brown op amp, 1/4 inch headphone out, and RCA input installed with 2.5x and 6x gain switches :) :)

 

 medaka_box-05-shiranui-evil-smile-smirk.jpg

post #6 of 33

Pics or it didn't happen!

post #7 of 33
Quote:
Originally Posted by LFF View Post

Pics or it didn't happen!

Were you reffering to me or the OP?

post #8 of 33

I have a lot of much more expensive gear and it usually lives up to my expectations...it should, it is expensive.  I've had my O2 for a day and it is nice to have something exceed my expectations for once.  Listening to LCD-2 through the 02 right now.

post #9 of 33
Quote:
Originally Posted by bowei006 View Post

Were you referring to me or the OP?


Probably you ;).

 

I would really love to get this amp in a more portable package and with a good digital pot for low volume listening without channel imbalance. Even after implementing the low gain mod it still doesn't get low enough IMO before channel imbalance sets in.


Edited by lee730 - 7/14/12 at 5:12pm
post #10 of 33

Pics of desktop variant O2:

 

Photo Jun 13, 2 41 02 PM.jpg

 

the bottom is the NFB, the top is the TRIAD power adapter that I wanted to show.

 

429788e1_IMG_6070.jpeg

 

6a4fea00_IMG_6072.jpeg

281363a5_IMG_6073.jpeg

 

 

Those are the parts used.

 

The cable is 0.8m Long, cable used is Denko 0.18mm^2 99.99% OFEC with braided shielding. (Read: Pro cable LOL). 

 

3e63accd_IMG_6085.jpeg

 

90dd3c9b_IMG_6086.jpeg

 

53ffaf0c_IMG_6087.jpeg

 

 

 

Weight: 480g

Size: 185mm x 165mm x 50mm

 

Positive Rail Voltage: 11.3V

Negative Rail Voltage: -11.4V

 

Output DC Offset:

R: 3.83mV

L: 3.92mV

 

Power-ON Transient at output:

400mV Peak, 0.5mS Duration (Loud Click)

Power-OFF Transient at output:

250mV Peak, 400mS Duration (Soft Thump)

 

Gain measurements:

Left-Low: 2.39x  Left-High: 5.69x

Right-Low: 2.37x  Right-High: 5.72x

 

Noise at output: 

L: 3.17mVrms

R: 3.32mVrms

 

 

 

Weight: 480g

Size: 185mm x 165mm x 50mm

 

Positive Rail Voltage: 11.3V (300mVrms Ripple)

Negative Rail Voltage: -11.4V (300mVrms Ripple)

 

Output DC Offset:

R: 3.83mV

L: 3.92mV

 

Power-ON Transient at output:

400mV Peak, 0.5mS Duration (Loud Click)

IMG_6158.JPG

Power-OFF Transient at output:

250mV Peak, 400mS Duration (Soft Thump)

IMG_6157.JPG

 

Gain measurements:

Left-Low: 2.39x  Left-High: 5.69x

Right-Low: 2.37x  Right-High: 5.72x

 

Noise at output: 

L: 3.17mVrms

R: 3.32mVrms

Approx.: 15mVp

IMG_6160.JPG

 

IMG_6166.JPG

 

  IMG_6170.JPG

 

 IMG_6168.JPG

 

Photo Jun 14, 2 46 56 PM.jpg

 

Photo Jun 14, 2 47 11 PM.jpg

 

Photo Jun 14, 2 47 17 PM.jpg

 

Photo Jun 16, 4 12 44 PM.jpg

 

 

CLOSEUP LINK:

https://www.dropbox.com/sh/wku3v79q79ctt32/GoCvJRJd8R?m


Edited by bowei006 - 7/14/12 at 5:18pm
post #11 of 33

I was indeed referred to you bowei006.

 

Thanks for posting those pictures. You're work looks fantastic and extremely clean. Kudos to you my friend! beerchug.gif

post #12 of 33
Quote:
Originally Posted by LFF View Post

I was indeed referred to you bowei006.

 

Thanks for posting those pictures. You're work looks fantastic and extremely clean. Kudos to you my friend! beerchug.gif

I had my pal and fellow head fier make it. He already had many left over parts and just offered(or I asked...and he agreed), it would have cost me a lot more to make it and order the parts and shipping than for him, he gets free parts shipping so it was pretty cheap getting it from him :)

 

The case is quite big, but that is for pshychiological purposes along with the possibly of one day adding an ODAC if I choose.

 

You're welcome, and to anybody looking at those pictures, don't feel bad and think I spent half an hour with all that. Those were all typed up and in my pm's already . Just a quick copy and paste and also I got some additional pictures from my dropbox! :) All is fine! :)

post #13 of 33
Quote:
Originally Posted by LFF View Post

I was indeed referred to you bowei006.

 

Thanks for posting those pictures. You're work looks fantastic and extremely clean. Kudos to you my friend! beerchug.gif

+1 

 

Very clean layout.  I went the B3 case route for my "desktop" solution, but desktop space is at a premium for me.

post #14 of 33

nice enclosure and clean layout.

post #15 of 33

^ x2

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