Grado RS-1 Right channel fault
Oct 15, 2007 at 6:03 PM Thread Starter Post #1 of 12

San Raal

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Hello,

I have a pair of RS-1 headphones that have developed a fault in the right channel. Normally I would simply send these back for repair - however this is the second time this fault has occured with this set of headphones.

As I live in the UK usually the repair time is 8-12 weeks so I dont want to get them fixed and find the same fault happen again - could this be another aspect of my system? Or just sheer coincidence?

The first time the right channel failed were when the headphones were less than a week old - at that time I was using a Benchmark DAC1 connected via my PC.

Since then Ive added a record player and a Mapletree Ear amplifier to my system that I use and the fault has re-appeared after 6 months of use.

I dont listen to particularly bassy music or have the volume cranked up loud so Im puzzled as to what could be causing this ??
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Any insights or tests that anyone could suggest would be appreciated
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I do have access to proffesional audio oscillators/monitors from work if thats of any help in fault finding?

Thanks
 
Oct 15, 2007 at 6:07 PM Post #2 of 12

vcoheda

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that's really odd. makes me think that either you are somehow shorting out the channel or the headphone - maybe wiring - is defective.

did you purchase them new or used.
 
Oct 15, 2007 at 6:22 PM Post #5 of 12

vcoheda

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do you hear the buzz out of other headphone jacks or only the mapletree.

is there a gain setting on the mapletree.
 
Oct 15, 2007 at 6:32 PM Post #6 of 12

San Raal

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Quote:

Originally Posted by Bizzel /img/forum/go_quote.gif
Do you plug them in with the amp already turned on?


Ive done that once or twice to reorganise the cabling.

I get the issue with the mapletree and the DAC1S headphone ports. The mapltree doesnt have a secondary gain only a main volume that is usually set to 9 oclock for comfortable listening.
 
Oct 15, 2007 at 6:54 PM Post #7 of 12

Televator

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this isn't perhaps the famous Grattle (Grado rattle) caused by a hair stuck against the driver (behind the cloth screen) which causes a low rattle on bass notes?

this is easily solved by a slightly sucking (just search for Grattle and you'll get complete descriptions how to do this)
 
Oct 15, 2007 at 8:25 PM Post #8 of 12

San Raal

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Thanks for the tip
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I blew gently into the driver and the rattling subsided but was still present and some frequencies.

Very strange in fact - At 50 Hz nothing

I adjusted my test oscillator to 60Hz nothing, 70 Nothing... then I hit 100Hz and they rattled, as I brought it back down through 60 and 70Hz it rattled at frequencies that it did not before
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So I blew a little harder and I was able to get rid of the rattle - but every so often it can still come back.

Sounds like a case of the aforementioned grattles - is there a way to permanently remove the hairs from the chamber?

Long term I guess its time either for a hair net or go bald
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anything for that pure head-fi sound
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Oct 15, 2007 at 8:58 PM Post #9 of 12

vcoheda

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so it's just a stray hair or two.
 

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