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Removing tone control circuit from Hafler DH-101
Removing tone control circuit from Hafler DH-101
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Old 13th November 2010, 11:32 AM   #1
gil1 is offline gil1  United States
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Join Date: Jan 2009
Default Removing tone control circuit from Hafler DH-101

Im looking to remove the tone control circuit on a DH-101 or just bypass it, I want to cut down on the amount of unused wiring and since I only use the line in for cd's I'd like to keep it as simple as possible.
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Old 14th November 2010, 02:10 AM   #2
AMP007 is offline AMP007  United States
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Join Date: Jun 2009
easy have done it years ago , check out the pc board , you can dremel saw off the tone section
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Old 15th September 2011, 04:25 PM   #3
Ron AKA is offline Ron AKA  Canada
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Join Date: Aug 2011
By default the tone control circuit is bypassed on the DH-101. That is the way I run mine. You have to push in the Tone button (to indicate white), to put the tone control circuit in service.
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Old 16th January 2012, 07:05 PM   #4
grtyvr is offline grtyvr
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Join Date: Sep 2010
I have a DH-101 as well and I am trying to learn some electronics. It looks to me that it's tone control is bypassed by having a 10Meg resistor to discourage any current flowing into the tone control circuit, right? Did the original poster want to completely remove the tone control circuit?

Then, I think it means removing:

R23, 24, 25, 28, 29, and 34.
C15, 16, 17, 18 and 19.

But I am just learning so take this with a grain of salt. But it looks like the Hafler DH-101 uses a James-Baxandall passive tone control circuit.

Am I on the right track?
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