Takamine Classical Hum: Difference between revisions

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I have been trying to solve this problem for some time now and am in contact with both Bose L1 and Takamine support - Bose support suggested I post to this forum.

<p>I have been trying to solve this problem for some time now and am in contact with both Bose L1 and Takamine support - Bose support suggested I post to this forum.

<br>

This solution is most likely related to shielding & grounding, but it also seems to be only occurring when I play through Bose L1 systems (Compact, 1S, & MII). I suspect the solution is in the purview of an old-school audio person. I would appreciate a technical recommendation.

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Here is my *current* theory (but I am still not sure what to do about it): The L1 has a sub-woofer and so may reproduce the low 60Hz hum more faithfully than most "acoustic amps". It is possible that the DSP speakers may be actively notch-filtering 60Hz hums (just a guess). I am fairly certain that the hum is coming from this unshielded solder point, and that when I wrap it with electrical-copper-tape there is some sort of shield-to-ground problem that causes a thin response (again, just a guess). This appears to be limited to Takamine Classical Palathetic pickups & Bose L1.

<br>

So, assuming the Bose L1 is simply faithfully reproducing a hum (that other acoustic amps may be filtering), and that the Palathetic pickup is humming / exhibiting thin response because of a shield-grounding problem (with the recognition that Takamine has intentionally removed the shielding from the pickup design), then what is the explanation and what are the alternatives. (Well, tabling the idea that I should gut the Takamine electronics and install an LRBaggs system - which would be *very* problematic)

So, assuming the Bose L1 is simply faithfully reproducing a hum (that other acoustic amps may be filtering), and that the Palathetic pickup is humming / exhibiting thin response because of a shield-grounding problem (with the recognition that Takamine has intentionally removed the shielding from the pickup design), then what is the explanation and what are the alternatives. (Well, tabling the idea that I should gut the Takamine electronics and install an LRBaggs system - which would be *very* problematic)</p>

</blockquote>

=== Resolution ===

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 <blockquote>
-I have been trying to solve this problem for some time now and am in contact with both Bose L1 and Takamine support - Bose support suggested I post to this forum.
+<p>I have been trying to solve this problem for some time now and am in contact with both Bose L1 and Takamine support - Bose support suggested I post to this forum.
 <br>
 This solution is most likely related to shielding & grounding, but it also seems to be only occurring when I play through Bose L1 systems (Compact, 1S, & MII).  I suspect the solution is in the purview of an old-school audio person. I would appreciate a technical recommendation.
@@ Line 19: / Line 19: @@
 Here is my *current* theory (but I am still not sure what to do about it): The L1 has a sub-woofer and so may reproduce the low 60Hz hum more faithfully than most "acoustic amps".  It is possible that the DSP speakers may be actively notch-filtering 60Hz hums (just a guess).  I am fairly certain that the hum is coming from this unshielded solder point, and that when I wrap it with electrical-copper-tape there is some sort of shield-to-ground problem that causes a thin response (again, just a guess).  This appears to be limited to Takamine Classical Palathetic pickups & Bose L1.
 <br>
-So, assuming the Bose L1 is simply faithfully reproducing a hum (that other acoustic amps may be filtering), and that the Palathetic pickup is humming / exhibiting thin response because of a shield-grounding problem (with the recognition that Takamine has intentionally removed the shielding from the pickup design), then what is the explanation and what are the alternatives.  (Well, tabling the idea that I should gut the Takamine electronics and install an LRBaggs system - which would be *very* problematic)
+So, assuming the Bose L1 is simply faithfully reproducing a hum (that other acoustic amps may be filtering), and that the Palathetic pickup is humming / exhibiting thin response because of a shield-grounding problem (with the recognition that Takamine has intentionally removed the shielding from the pickup design), then what is the explanation and what are the alternatives.  (Well, tabling the idea that I should gut the Takamine electronics and install an LRBaggs system - which would be *very* problematic)</p>
 </blockquote>
 === Resolution ===