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MP11SE - Headphone Jack Unbalanced Sound #2902303
10/20/19 11:07 AM
10/20/19 11:07 AM
Joined: Apr 2008
Posts: 1
_offbeat Offline OP
Junior Member
_offbeat  Offline OP
Junior Member

Joined: Apr 2008
Posts: 1
Hi pianoworld!!

I recently received my new MP11SE and sooooo much in love with this piano, I seem to be having some potential sound issues, through the headphone jack. Issues I've experienced:
- headphone unbalanced sound L/R ear (right ear is louder than left)
- headphone buzz/hum (like a guitar amp / mic) ONLY in left year
- buzz/hum comes in and out, and playing the lower register bass keys returns the buzz
- putting my hand on the left side of the piano and applying some weight causes buzz to disappear and sound volume to change.

I ordered through GC and they said this is typical to some instruments due to electrical interference, but could also be a defect (learning towards to latter). I went to PW and also found this headphone static post (http://forum.pianoworld.com/ubbthreads.php/topics/2845479/1.html)

I've tested with:
5 headphone models and 3 different (1/4 to 3.55m) adapters with consistent buzz/hum in ONLY left ear, through varied in level depending on headphone used. for some headphones, the right ear is consistently louder than the left. If I do NOT use the headphone jack, and use the line out through my focusrite interface connected to my iloud speakers, it eliminates all buzz and unbalanced-ness.

See reference:
(video of me using headphone jack + iloud, see sound change as i put my hand on the piano)
https://drive.google.com/file/d/1MBw8BKjVVjb3ThNVTRbO2JUz814FnSZS/view?usp=sharing
(video of adding weight to left side of piano with books and it being less of a problem)
https://drive.google.com/file/d/1C2TKWgQygxtlQe88P53ZKXCwtbAOsXGs/view?usp=sharing

I'm pretty convinced it is a defect at this point... but the previous post really helped make me feel like it wasn't only me so I just wanted to voice my concern here smirk This thing is 75lbs, basically more than 80% of my weight and it was insanely difficult to get up my stair... Scared to do the exchange and then have it happen again, I've read through so many quality control issues so far... This is an upgrade from my roland FP30, which I didn't have a problem for in 3 years. My ooold roland FP4 has also lasted me over 7 years. I'm so sad!


thanks for being here for me during these difficult times pianoworld.
-jas

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Re: MP11SE - Headphone Jack Unbalanced Sound [Re: _offbeat] #2902307
10/20/19 11:15 AM
10/20/19 11:15 AM
Joined: Sep 2009
Posts: 9,723
Raleigh, North Carolina
MacMacMac Offline
9000 Post Club Member
MacMacMac  Offline
9000 Post Club Member

Joined: Sep 2009
Posts: 9,723
Raleigh, North Carolina
Send it back. It's defective. None of those symptoms are normal.

The story they gave you Is nonsense. Ignore it.
"... this is typical to some instruments due to electrical interference"

This is only typical of defective equipment.

Re: MP11SE - Headphone Jack Unbalanced Sound [Re: MacMacMac] #2902331
10/20/19 12:17 PM
10/20/19 12:17 PM
Joined: Aug 2016
Posts: 3,710
G
Gombessa Offline
3000 Post Club Member
Gombessa  Offline
3000 Post Club Member
G

Joined: Aug 2016
Posts: 3,710
Originally Posted by MacMacMac
Send it back. It's defective. None of those symptoms are normal.

The story they gave you Is nonsense. Ignore it.
"... this is typical to some instruments due to electrical interference"

This is only typical of defective equipment.

Yep, there's something wrong with it. Sounds like it is likely a minor issue, but as it's a brand new instrument, you should let Kawai deal with it (unless you like to self-help with electronics).


Yamaha P-85, P-105, CP50, Kawai MP11 || Kawai NV-10
Re: MP11SE - Headphone Jack Unbalanced Sound [Re: _offbeat] #2902392
10/20/19 02:01 PM
10/20/19 02:01 PM
Joined: Jul 2014
Posts: 1,474
Cheshire, United Kingdom
Doug M. Offline
1000 Post Club Member
Doug M.  Offline
1000 Post Club Member

Joined: Jul 2014
Posts: 1,474
Cheshire, United Kingdom
Originally Posted by _offbeat
Hi pianoworld!!

I recently received my new MP11SE and sooooo much in love with this piano, I seem to be having some potential sound issues, through the headphone jack. Issues I've experienced:
- headphone unbalanced sound L/R ear (right ear is louder than left)
- headphone buzz/hum (like a guitar amp / mic) ONLY in left year
- buzz/hum comes in and out, and playing the lower register bass keys returns the buzz
- putting my hand on the left side of the piano and applying some weight causes buzz to disappear and sound volume to change.

I ordered through GC and they said this is typical to some instruments due to electrical interference, but could also be a defect (learning towards to latter). I went to PW and also found this headphone static post (http://forum.pianoworld.com/ubbthreads.php/topics/2845479/1.html)

I've tested with:
5 headphone models and 3 different (1/4 to 3.55m) adapters with consistent buzz/hum in ONLY left ear, through varied in level depending on headphone used. for some headphones, the right ear is consistently louder than the left. If I do NOT use the headphone jack, and use the line out through my focusrite interface connected to my iloud speakers, it eliminates all buzz and unbalanced-ness.

See reference:
(video of me using headphone jack + iloud, see sound change as i put my hand on the piano)
https://drive.google.com/file/d/1MBw8BKjVVjb3ThNVTRbO2JUz814FnSZS/view?usp=sharing
(video of adding weight to left side of piano with books and it being less of a problem)
https://drive.google.com/file/d/1C2TKWgQygxtlQe88P53ZKXCwtbAOsXGs/view?usp=sharing

I'm pretty convinced it is a defect at this point... but the previous post really helped make me feel like it wasn't only me so I just wanted to voice my concern here smirk This thing is 75lbs, basically more than 80% of my weight and it was insanely difficult to get up my stair... Scared to do the exchange and then have it happen again, I've read through so many quality control issues so far... This is an upgrade from my roland FP30, which I didn't have a problem for in 3 years. My ooold roland FP4 has also lasted me over 7 years. I'm so sad!


thanks for being here for me during these difficult times pianoworld.
-jas


Hi Jas,

In your situation, I would contact Kawai James and Kawai HQ in your country (via email) to ask if this is a known issue. The instrument will be under warrenty and your seller is GC, so they are responsible for resolving any malfunction under warrenty; however, by contacting Kawai, you go into the conversation with GC fully armed with any advise Kawai can offer to help speed along the process of getting it repaired.

Probably the issue can be fixed without replacing the instrument and I would get it sorted without racing to get replacement model---when heavy instruments are shipped, it's at this juncture that damage due to mishandling is most likely to cause a defect. That's what I did with my headphone malfunction on my Yamaha PSR7000 2 months into my ownership.

Kind regards,

Doug.


Instruments: Current - Kawai MP7; Past - Yamaha PSR7000
Software: Sibelius 7; Neuratron Photoscore Pro 8
Stand: K&M 18953 Table-style Stage Piano Stand
Re: MP11SE - Headphone Jack Unbalanced Sound [Re: _offbeat] #2902402
10/20/19 02:24 PM
10/20/19 02:24 PM
Joined: Jan 2016
Posts: 1,548
Not Banned
N
newer player Online content
1000 Post Club Member
newer player  Online Content
1000 Post Club Member
N

Joined: Jan 2016
Posts: 1,548
Not Banned
Despite what GC stated, those are not typical features lol.

Try disconnecting everything except the power cord and the headphones. Try plugging into a different outlet (use an extension to another room if possible). I don't think this is your issue.

You can use a flashlight to look inside the headphone jack to see if anything looks amiss.

Based on your videos and the neat variable adjustment feature, I would guess these are potential issues:

- bad headphone jack
- bad soldier joint
- short / damaged wire or component
- cracked or defective board

You may not easily DIY repair a bad board. So either return it or get it fixed.

If the action is smooth and quiet, you might ask GC to send a tech to repair at your house; he may require 2 visits if new parts are required.

Re: MP11SE - Headphone Jack Unbalanced Sound [Re: _offbeat] #2902411
10/20/19 02:44 PM
10/20/19 02:44 PM
Joined: Apr 2009
Posts: 4,786
Pennsylvania
D
dmd Offline
4000 Post Club Member
dmd  Offline
4000 Post Club Member
D

Joined: Apr 2009
Posts: 4,786
Pennsylvania
It sounds like you have adequately tested with various headphones with similar results so that implies it is the connection on your MP11SE that is the problem.

If you explain that to GC I am sure they will agree.

Contact them and they should just replace you MP11SE with a different one.

Good Luck


Don

Kawai MP11SE, Edifier R1850DB Active Bookshelf Speakers, Yamaha HS8S Powered Subwoofer, SennHeiser HD 559 Headphones, Pianoteq and numerous other VSTs
Re: MP11SE - Headphone Jack Unbalanced Sound [Re: _offbeat] #2902504
10/20/19 07:15 PM
10/20/19 07:15 PM
Joined: Sep 2007
Posts: 15,725
Hamamatsu, Japan
Kawai James Online content
Yikes! 10000 Post Club Member
Kawai James  Online Content
Yikes! 10000 Post Club Member

Joined: Sep 2007
Posts: 15,725
Hamamatsu, Japan
Hello offbeat, welcome to the forum.

I'm sorry to read that you are experiencing some issues with the MP11SE's headphone output.

My recommendation would be to report this matter to my colleagues at Kawai America:

https://kawaius.com/technical-support-division/contact-us/

I hope this helps.

Kind regards,
James
x


Employed by Kawai Japan, however the opinions I express are my own.
Nord Electro 3 & occasional rare groove player.

"I agree that the User Manual is very good." - arc7urus, March 2019

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