Welcome Guest! To enable all features please Login or Register.

Notification

Icon
Error

Login


Options
View
Go to last post Go to first unread
Jordo  
#1 Posted : Thursday, November 8, 2012 12:49:58 PM(UTC)
Jordo

Rank: Member

Groups: Member
Joined: 12/7/2011(UTC)
Posts: 474
Location: Amsterdam

Thanks: 31 times
Was thanked: 4 time(s) in 3 post(s)
Hi all,

Now I have a more specific question about my headphone story.

Here is a hookup sceme of the Ventus EZ in combination with the BIII, IVYIII Dual Mono Setup.

If I dim the RH channel on my PC Soundcard I hear the LH channel trough the LH speaker. That's Correct.
If I dim the LH speaker I hear the RH channel trough both speakers.
This is strange is'nt it?

When I do soundtesting trough soundtests on the internet I have the same.
If I disconnect the LH or RH TTL Level Toslink, directly connected to the DAC, it's the same.
If I have my playback trough the End-Amp and speakers all is correct.

(Note that I have inverted the input signals of the RH channel on the Ventus. This improved the sound drastically)

Hope someone sees what is heappening...

Thx,

Jordo
Jordo attached the following image(s):
hookup sceme.png (252kb) downloaded 15 time(s).

You cannot view/download attachments. Try to login or register.
Jordo  
#2 Posted : Friday, November 9, 2012 12:24:39 PM(UTC)
Jordo

Rank: Member

Groups: Member
Joined: 12/7/2011(UTC)
Posts: 474
Location: Amsterdam

Thanks: 31 times
Was thanked: 4 time(s) in 3 post(s)
I am going to try it with a high Ohm headphone of 300 Ohm or so.
Maybe that will help?

The Hifiman I tried was 38 Ohm...

Someone on another forum discovered a little mistake in the connection on the Jack.
Here is the corrected sceme.

Edited by user Friday, November 9, 2012 2:22:47 PM(UTC)  | Reason: Not specified

Jordo attached the following image(s):
hookup sceme.png (253kb) downloaded 14 time(s).

You cannot view/download attachments. Try to login or register.
Jordo  
#3 Posted : Sunday, November 11, 2012 12:16:10 AM(UTC)
Jordo

Rank: Member

Groups: Member
Joined: 12/7/2011(UTC)
Posts: 474
Location: Amsterdam

Thanks: 31 times
Was thanked: 4 time(s) in 3 post(s)
I now have a Beyerdynamic T70 250 Ohm,

Makes no difference...
Russ White  
#4 Posted : Thursday, November 15, 2012 11:04:54 PM(UTC)
Russ White

Rank: Administration

Groups: Administration, Customer
Joined: 10/24/2006(UTC)
Posts: 3,979
Location: Nashville, TN

Thanks: 25 times
Was thanked: 89 time(s) in 83 post(s)
Are you sure you have the BIII setup correctly for dual mono?

Do you have the address jumper closed on one channel?
Jordo  
#5 Posted : Monday, November 19, 2012 4:27:07 PM(UTC)
Jordo

Rank: Member

Groups: Member
Joined: 12/7/2011(UTC)
Posts: 474
Location: Amsterdam

Thanks: 31 times
Was thanked: 4 time(s) in 3 post(s)
Hi Russ,

Thanks for your reply.

When going trough all the set-ups for the DAC boards I noticed that I forgot to install the adress jumper on the RH DAC Board after I made some switches from the Left and Right DAC Boards for troubleshooting.

The firmware chip is installed on the LH board.
I have corrected this 2 weeks ago and the Adress jumper is now connected on the RH board. The LH is not shorted.

With normal playback trough the speakers all works normal.
Tomorrow I wil re-meassure the values of the resistors on the Ventus Boards. Maybe something went wrong here.

The Adress jumper is placed but it is not an original jumper. I just connected it with some solder and a Molex pin.

Thx,

Jordo

Edited by user Monday, November 19, 2012 4:30:46 PM(UTC)  | Reason: Not specified

Rss Feed  Atom Feed
Users browsing this topic
GuestUser (3)
Forum Jump  
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.