android
  #1  
Old 08-01-2009, 07:07 AM
JDM2k9's Avatar
JDM2k9 JDM2k9 is offline
Junior Member
 
Join Date: Jul 2009
Location: Europe
Posts: 46
Default 4-pole connector

The headphones that came with my SPINN has 4 poles instead of the normal three (L+,R+,GND). I only know two applications where there are 4 poles:
1.) Microphone - In headsets that have a microphone the fourth pole transmits its signal (L+,R+,Mic+,GND)
2.) 4-pole amplifiers - The left and right channel have separate ground. This achieves complete channel separation and achieves high output power at low voltages.
(L+,R+,L-,R-)
So I am wondering, since the headphones do not seem to have a microphone built in, does the SPINN have a 4-pole amplifier?
Reply With Quote

Advertisement [Remove Advertisement]

  #2  
Old 08-01-2009, 09:00 AM
Olley Olley is offline
Ultra Senior Member
 
Join Date: Dec 2008
Posts: 4,894
Default

You've got a great question there. I hadn't realized it but in checking today my SPINN headphones do indeed have a 4-pole plug. This plug works fine on my other players, and other headphones work fine on my SPINN. I'm thinking it simply permits unique grounds for each channel. You get left/left ground and right/right ground. This is a typical 3-pole plug:


Iriver has simply seperated the ground segment into two sections. It's possible the SPINN keeps unique ground for each channel all the way back to the amp. A good test would be to see if those two top poles are connected internally in the plug.

In a quick listen test I don't hear any audio placement difference using these headphones or some other 3-pole ones.

I don't think there is any TV-out capability on the SPINN, which is why some players have a 4-pole jack.

Last edited by Olley; 08-01-2009 at 09:30 AM.
Reply With Quote

Reply

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 05:40 AM.