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Old 6th July 2013, 10:05 AM   #1
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Default Headphone amp recommendation required?

Have looked around for a suitable amp to suit my requirement but nothing seems to meet it.
I use a Sennheiser HD414 headphone when listening on my laptop but as they are 600 ohm the laptop will just not drive them loud enough.
So, I need a headphone amp that can be driven from the laptop audio out and will match the 414, any idea's?
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Old 6th July 2013, 02:25 PM   #2
DUG is offline DUG  Canada
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Use a chip amp (LM3886 or similar) using +/- 30V supplies to get the voltage swing you need.

(Is 1W enough?)

You probably don't need that much heat sinking to drive 600R

My $0.02

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Old 6th July 2013, 04:42 PM   #3
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Thanks but I'm looking for something to plug and play, just don't have any tinkering time ATM.
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Old 6th July 2013, 06:07 PM   #4
jcx is offline jcx  United States
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are you certain of your year, headphone Z - changes substanially

Sennheiser HD414 - Wikiphonia
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Old 6th July 2013, 06:22 PM   #5
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They are at least 30 years old and definitely 600 ohms. Even the headphone out on my CD player won't drive them to an acceptable level.
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Old 6th July 2013, 06:39 PM   #6
jcx is offline jcx  United States
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probably not going to find too many portable solutions, not in Li battery/USB power without DC-DC built in - dual 9V batteries would give OK swing but not likely better than a wall powered CD player's headphone out
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Old 6th July 2013, 06:46 PM   #7
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It's for home use so mains power will be used.
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Old 6th July 2013, 07:00 PM   #8
jcx is offline jcx  United States
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7.5+ W into 8 Ohms would give the Vswing you might want - 600 Ohms only "absorbs" 8/600 of the power, = the headphone 100 mW power rating - actually several times more could be OK for dynamic peaks if that is a continuous power rating for the headphone

so many desk top computer speaker amps, lower power HT amps could at least get loud enough for cheap

although I wouldn't go with switching outputs with your non standard load
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Old 6th July 2013, 07:08 PM   #9
DUG is offline DUG  Canada
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Something like this?


PIONEER STEREO POWER AMPLIFIER M-IS21

Pioneer IS-21MD | Service Manual

Pioneer Stereo Power Amplifier M IS21 | eBay

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Old 6th July 2013, 08:32 PM   #10
jcx is offline jcx  United States
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could be a trifle over power @ 100 W/ch
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