Very Low volume from headphone output on iMac

Since upgrading my 2011 27" iMac to Yosemite, the sound output from the headphone jack has plummeted, to a point where I can hardly hear it through my external speakers. Before, it was deafening, now it is almost inaudible. Airplay output and the internal speakers seem unaffected. I have restarted, zapped the PRAM, checked Audio MIDI Setup, checked Sound Prefs, everything is turned up to the max, to no effect.
Any idea what might be happening here?

I also experience the same problem with my MacBook Pro 13" last gen. I haven't used my iPod's earphone with it for some time. I have noticed this problem since yesterday (4/6/2010). Beside resetting PRAM, repairing disk and its permission, plug and unplug the head jack, tried with different earphones, check the Audio Midi Setup; I also deleted all audio plist files in /Library and ~/Library folders (incase those preference files are corrupted). Those efforts fail to solve the problem.
Is this a problem caused by 10.6.3? I never have a problem while still using 10.6.2.

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Very low volume on headphone jack on MBP 13" but no red light

Hi I am looking for solution for my problem where in I am currently getting very low volume on headphone jack. There was no problem before, everything used to work perfectly fine.
I couldn't find comprehensive solution for this. Could anyone please point me to the correct thread if solution is already available.
my details:
MBP 13" Snow leopard, 10.6.5 - First Gen. Unibody MAC.
problem: Very low volume when headphone is connected.
Things: I have tried:
1. Headphone is fine. Works correctly on windows PC and on my iphone.
2. Tried system pref. volume is max.
3. Upon connecting headphone to MBP it is detected as headphone.
4. Tried Audio MIDI setup, settings seem to be correct 44.1KHz 2ch-16 bit
5. There is NO red light from headphone jack.
6 Tried poking toothpicks in to audio out but didn't help.
7 Tried creating new temp. admin user account but headphone low volume remains.
8. Tried safe boot - no joy.
9 Safe boot was followed by normal boot-> Ran Disk Util tried repair permission. No luck.
10. Also followed steps to clear PR RAM etc. - problem remains.
11. Heard about logic board replacement but don't want to go by that route.
Can anyone point me to correct thread or provide the solution..
help is much appreciated.
Thanks...

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DP-K
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Just wondering if anyone else thinks the volume for music playback, even when set at max, with earphones is pretty low? (Not exactly "Big On Sound"!)
Is there any way to change this?

For Bass:
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Now turn up the volume and enjoy
For Loud Music:
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If you find my post useful then click on
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Sound reading for your edification:
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http://docs.info.apple.com/article.html?artnum=31314
http://docs.info.apple.com/article.html?artnum=24718
http://www.info.apple.com/kbnum/n24503
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Link
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Hi there,
I have an
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This question was solved.
View Solution.

Hi @Kindakool
I understand that you are having trouble with the sound from your built in speakers. I am happy to help you with this.
You can start with the following page, even though you are getting some sound.
No Sound from the Speakers (Windows 7)
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http://www8.hp.com/us/en/contact-hp/ww-phone-assist.html
Malygris1
I work on behalf of HP
Please click Accept as Solution if you feel my post solved your issue, it will help others find the solution.
Click Kudos Thumbs Up on the right to say “Thanks” for helping!

New HP2000 laptop plays very very low volume at the highest setting, please help me fix this!

new hp2000 laptop
very low volume
gone into all the settings i can see and cannot find a way to rectify this problem
help me hear my hulu / netflix / amazon prime / youtube
THANKS!

Hi, sorry to hear that you are having issues with your new notebook audio. I will be happy to help with the issue but first I will need to know the exact model number of the computer as well as the operating system you are using. To find the model number, please look on the bottom of the computer. You will see a white sticker. Here is where you will find the model number. If by chance you do not see the model number, please remove the battery and you will find it. I look forward to hearing from you.
Thanks for your time.
Click the “Kudos Thumbs Up" at the bottom of this post to say “Thanks” for helping!
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
W a t e r b o y 71
I work on behalf of HP

Microphone Very Low Volume

Hi
I have been using my new MXL USB 007 stereo microphone on Windows 7 Professional with clear quality audio for a while now.
On Monday 26 November 2012, I reformatted my PC laptop hard disk and installed Windows 8 Pro.
Now, the quality of the recorded audio is heavily subdued without the clear clarity I used to get. In other words, I am getting very low volume, even though the recording level is on 85 (I tried with 90 as well. 100 has way too much distortion).
As a test, I connected the same microphone to another one of my machines that still has Windows 7 Professional, and the audio result was excellent. So, it’s not the actual microphone.
I have checked the Windows 8 sound settings. It says the device is working properly. There is only the Levels to adjust and under the Advanced tab, I have 2 channel, 16 bit, 48 kHz, DVD quality - same as before on Windows 7.
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The second time, I connected the microphone only after all Windows Updates and device drivers were applied.
In both cases, the problem of very low input volume remains.
I searched online, and found somebody else has the same problem with a different vendors microphone.
I quote from:
http://www.tomshardware.com/forum/1251-73-microphone-input
"I use Cakewalk for sound processing and have discovered that my Samson CO1U
microphone has almost no input strength under Windows 8. I have tweaked about everything I can imagine. Any ideas? "
On my machine, I looked at Device Manager and found:
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If so, can we please get a Windows Update on this issue?
Awaiting in anticipation ....

Very Low volume from headphone output on iMac

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