android
  #421  
Old 12-05-2011, 07:40 AM
Urne's Avatar
Urne Urne is offline
Member
 
Join Date: Nov 2010
Location: Denmark
Posts: 247
Default

Wow, that looks wonderful!
Reply With Quote

Advertisement [Remove Advertisement]

  #422  
Old 12-08-2011, 11:14 PM
Moyt's Avatar
Moyt Moyt is offline
Member
 
Join Date: Jul 2006
Location: UK
Posts: 103
Default

Damn I'm sooo close to jumping on the o2 bandwagon!
Reply With Quote

  #423  
Old 12-13-2011, 09:45 AM
NwAvGuy's Avatar
NwAvGuy NwAvGuy is offline
Member
 
Join Date: Feb 2011
Location: Northwest USA
Posts: 176
Default

Quote:
Originally Posted by The DarkSide View Post
If there's anyone selling one of these FULLY ASSEMBLED in the USA please PM me,.... Thanks!!!
JDS Labs is selling a fully assembled and tested O2 board. From there you can just slip into the the enclosure and buy a ready made front panel from a few different sources. the latest details are always in the O2 Resources section on my blog (including a link to JDS).

Sorry I've been MIA here for a while. I was keeping an eye on the thread and didn't see too much that needed my input.
__________________
Personal Audio Blog: http://nwavguy.com (non-commercial, objective reviews & commentary)
Reply With Quote

  #424  
Old 12-14-2011, 08:14 PM
johthor johthor is offline
Junior Member
 
Join Date: Dec 2011
Posts: 4
Default O2 complete builds

I might be incorrect but I believe JDS labs is offering a complete O2 for sale on their website.

I have just registered here after reading many posts by NwAvg. Your post and blogs are awesome. I am new to this hobby and had been wading through Headfi until I read you were banned there. Just wanted you to know many of us have banned ourselves from there.

Your contributions to the HIFI hobby are priceless. Thank you very much
Reply With Quote

  #425  
Old 12-14-2011, 08:33 PM
NwAvGuy's Avatar
NwAvGuy NwAvGuy is offline
Member
 
Join Date: Feb 2011
Location: Northwest USA
Posts: 176
Default

Quote:
Originally Posted by johthor View Post
I have just registered here after reading many posts by NwAvg. Your post and blogs are awesome. I am new to this hobby and had been wading through Headfi until I read you were banned there. Just wanted you to know many of us have banned ourselves from there.

Your contributions to the HIFI hobby are priceless. Thank you very much
You're welcome. Thanks for the kind words. I just posted a new review of something a bit different (it's not an iPod at least )
__________________
Personal Audio Blog: http://nwavguy.com (non-commercial, objective reviews & commentary)
Reply With Quote

  #426  
Old 12-17-2011, 07:00 PM
t2t t2t is offline
Junior Member
 
Join Date: Oct 2011
Location: Virginia
Posts: 20
Default

I was able to get the face plate mounted on my O2 this afternoon. This is the face plate from the DIYAudio group buy that was conducted. Unfortunately, all of the face plates have been sold. They are a great face plate - beautiful, great fit, etc.


Reply With Quote

  #427  
Old 12-18-2011, 03:11 AM
nupi nupi is offline
Junior Member
 
Join Date: Nov 2011
Posts: 18
Default

Being as happy as I am with my FiiO E10, is there much point in trying to hunt one down for Xmas? (hinthint, we'd love to see an E10 review, I honestly think it is the DAC to go for now :P)
Reply With Quote

  #428  
Old 12-18-2011, 10:00 AM
NwAvGuy's Avatar
NwAvGuy NwAvGuy is offline
Member
 
Join Date: Feb 2011
Location: Northwest USA
Posts: 176
Default

@nupi, The E10 review will likely be in a few weeks (early January). The O2 can drive a lot of headphones the E10 can't. But if you and your headphones are happy with your E10 don't worry about the O2.

I'm curious if you've had any issues with the E10's headphone jack? Several have said the headphone plug doesn't fit tightly enough, there's noise when the headphone cable or amp are moved during listening, etc. Have you noticed any of those? I didn't notice any issues with the E11's jack when I reviewed it.
__________________
Personal Audio Blog: http://nwavguy.com (non-commercial, objective reviews & commentary)
Reply With Quote

  #429  
Old 12-19-2011, 04:56 PM
ohmer ohmer is offline
Junior Member
 
Join Date: Oct 2011
Posts: 3
Default

That is a sweet rosewood enclosure. Wish I had a shop.

I've had a good experience driving my Beyer 250 Ohm DT990 PRO and I get no noise. I also don't have a problem with the plug being loose. I have 3 other headphones (one IEM) I have used with it and they work well.

It's great but I wish it had a line in option. Then I could power it with an external 5v battery for portable use.
Reply With Quote

  #430  
Old 12-20-2011, 01:01 AM
nupi nupi is offline
Junior Member
 
Join Date: Nov 2011
Posts: 18
Default

Quote:
Originally Posted by NwAvGuy View Post
I'm curious if you've had any issues with the E10's headphone jack? Several have said the headphone plug doesn't fit tightly enough, there's noise when the headphone cable or amp are moved during listening, etc. Have you noticed any of those? I didn't notice any issues with the E11's jack when I reviewed it.
No issues with the headphone jack that I can tell (neither with my IEMs nor the D2000) - however, the EM shielding could be better, if my phone is communicating with the towers on GSM, I can hear the familiar 2600Hz buzz which really should not happen. Other than that, no issue that I can see.

As for hard to drive equipment, I currently do not have any (hell, the D2000 even sounds decently out of the Clip+ albeit a more powerful source definitely improves things a little) but I am toying with the idea of getting myself an LCD-2 but I fear this is another overpriced FOTM in the forum-that-should-not-be-named... Or maybe a HD600 but that beast keeps increasing in price
Reply With Quote

  #431  
Old 12-20-2011, 06:45 AM
t2t t2t is offline
Junior Member
 
Join Date: Oct 2011
Location: Virginia
Posts: 20
Default

Quote:
Originally Posted by nupi View Post
... but I am toying with the idea of getting myself an LCD-2 but I fear this is another overpriced FOTM in the forum-that-should-not-be-named... Or maybe a HD600 but that beast keeps increasing in price
There's actually quite a few of us from over at HeadFi who have been going the Grado custom route with Magnum drivers. What were finding out is that we're getting a much smoother driver than the de-facto Grado. For anyone who might have been pushed away from the Grado sound in the past, they might consider taking another look at a setup based on the Magnum driver from Symphones. I think some people might be quite surprised. Plus, such a custom set up isn't that hard on the wallet, either.
Reply With Quote

  #432  
Old 12-25-2011, 05:07 PM
ov_Darkness's Avatar
ov_Darkness ov_Darkness is offline
Junior Member
 
Join Date: Jul 2006
Location: Warsaw, Poland
Posts: 8
Default

It's very interesting amp. I think you've started something REALLY BIG @NwAvGuy!
I'll get myself a dekstop version PCB's as soon as they'll be available!

I'm thinking about something: is it possible to make O2 AMP in smaller factor?
Something really portable with ~20h battery life? Possibly Li-ion's recharged via USB?
The enclosure could be the smallest Hammond 1455C801
14500 (AA size) 3.7V cells are quite nice.
Using ALPS RK097 with built-in switch could render on/off switch useless - saves place.
There's many DIY'er out there, who have the skills necessary to solder SMD parts.
__________________
audio YP-Z5/Rio Carbon/HTC HD2/Samsung S8500 => K81DJ, UETriple.Fi
other Thinkpad X200, Fuji S5pro.
Reply With Quote

  #433  
Old 12-27-2011, 01:36 AM
nupi nupi is offline
Junior Member
 
Join Date: Nov 2011
Posts: 18
Default

Quote:
Originally Posted by t2t View Post
There's actually quite a few of us from over at HeadFi who have been going the Grado custom route with Magnum drivers. What were finding out is that we're getting a much smoother driver than the de-facto Grado. For anyone who might have been pushed away from the Grado sound in the past, they might consider taking another look at a setup based on the Magnum driver from Symphones. I think some people might be quite surprised. Plus, such a custom set up isn't that hard on the wallet, either.
When I look at the Magnum page, that looks plenty expensive - I could definitely get a HD650 for less than the quoted 399 (much less buying the Grado first)...
Reply With Quote

  #434  
Old 12-27-2011, 11:26 AM
NwAvGuy's Avatar
NwAvGuy NwAvGuy is offline
Member
 
Join Date: Feb 2011
Location: Northwest USA
Posts: 176
Default

@ov_Darkness, the Li-ion issue is complex and discussed extensively in the diyAudio O2 thread. The short answer is there's no safe and reasonably priced way to do it because of the O2's need for dual power supplies with relatively high voltage and the tricky charging requirements of Li-ion batteries. Look up "Lipo Fire" on YouTube for houses that have burned down, auditoriums emptied, planes making emergency landings, etc., all due to Li-ion battery fires.

Even the on/off switch isn't so simple. Because there are two power supplies, the O2 needs a dual pole power switch. Volume control switches are all single pole.

I'm guessing that "China Inc" might do with the O2 what FiiO did with the AMB Mini3 and their E11. They made it small, cheap, and Li-Ion powered using a DC-DC converter from a single 3.7V cell. The O2 would require a dual DC-DC converter. The price for an assembled amp Mini3 effectively dropped from nearly $200 to $65. It's hard to beat mass production in China on pricing compared with DIY.
__________________
Personal Audio Blog: http://nwavguy.com (non-commercial, objective reviews & commentary)
Reply With Quote

  #435  
Old 12-29-2011, 02:07 PM
t2t t2t is offline
Junior Member
 
Join Date: Oct 2011
Location: Virginia
Posts: 20
Default

Quote:
Originally Posted by nupi View Post
When I look at the Magnum page, that looks plenty expensive - I could definitely get a HD650 for less than the quoted 399 (much less buying the Grado first)...
No. No. Most of us are not using a pair of Grado SR-325i headphones for $299 and then having the Symphones' Magnum upgrade performed for an additional $399.

Instead, several of us are opting for a pair of the v.4 Magnum drivers from Symphones and installing them in our wooden-cupped Grados. The drivers sell for $120 a pair + approximately $20 in shipping. For about $300, you have have a "killer" set of headphones based on the Grado premise, but with a much more refined driver.
Reply With Quote

  #436  
Old 01-02-2012, 03:46 AM
nupi nupi is offline
Junior Member
 
Join Date: Nov 2011
Posts: 18
Default

After shipping to Europe, that still is more than a HD650 and I doubt I like the Grado premise to start with...
Reply With Quote

  #437  
Old 01-03-2012, 06:47 AM
xnor's Avatar
xnor xnor is offline
Junior Member
 
Join Date: Jul 2011
Posts: 23
Default

Innerfidelity has some measurements of an older magnum driver and it's worse than an SR60i.. Maybe things improved with the v4 driver, but the driver is one of many parts in a headphone that need to be "tuned" to provide the desired frequency response, low distortion etc.
Reply With Quote

  #438  
Old 01-03-2012, 06:53 PM
maverickronin's Avatar
maverickronin maverickronin is offline
Junior Member
 
Join Date: Apr 2010
Location: Midwest USA
Posts: 19
Default

Grados are supposed to be colored as hell so you can't really judge them like that. The Magnum drivers would seem to keep the "good" parts of the color and make them more listenable with less ringing in the driver according to these CSD plots.
Reply With Quote

  #439  
Old 01-04-2012, 08:02 PM
saratoga saratoga is offline
Rockbox Developer / Moderator
 
Join Date: Apr 2007
Posts: 3,586
Default

Quote:
Originally Posted by NwAvGuy View Post

As for the desktop amp, I'm still hoping to have something published before the first day of winter. Right now I'm waiting on information regarding a possible DAC board to pair with it as an option for those wanting an integrated DAC and headphone amp.
Looking at your reviews again, I think we really need to see about getting that Clip+ USB audio driver working. The relatively good output compared to other USB DACs coupled with the very small size would make it a good choice for driving an external, cost effective amplifier.

I hadn't realize the available USB DACs were so average, at least without spending quite a bit.
__________________
Interested in Google's Summer of Code ? PM me.
Reply With Quote

  #440  
Old 01-04-2012, 08:27 PM
Marvin the Martian's Avatar
Marvin the Martian Marvin the Martian is offline
Ultra Senior Member
 
Join Date: Oct 2008
Location: east central NY state
Posts: 10,602
Default

Quote:
Originally Posted by saratoga View Post
Looking at your reviews again, I think we really need to see about getting that Clip+ USB audio driver working. The relatively good output compared to other USB DACs coupled with the very small size would make it a good choice for driving an external, cost effective amplifier.

I hadn't realize the available USB DACs were so average, at least without spending quite a bit.
Are you referring to an actual line-out signal through the USB connection? That would thrill a lot of people, although in all fairness I think the headphone-out still does a pretty decent job with an amp.
__________________
iPod Touch 5G 32GB, Touch 4G 32GB, Clip Sport 8GB. Rockbox-> Clip Zip 4GB, iPod Nano 2G 4GB, iPod 5.5G 80GB
2012 Nexus 7 32GB, Asus MeMoPad 8 16+64GB, LG Optimus G Pro, Nokia Lumia 900 and Lumia 520
Reply With Quote

Reply

Tags
diy, headphone amp, mini3, o2, objective2

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT -5. The time now is 05:25 AM.