Removing tone control circuit from Hafler DH-101

gil1 · 13th November 2010, 11:32 AM

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.

AMP007 · 14th November 2010, 02:10 AM

easy have done it years ago , check out the pc board , you can dremel saw off the tone section

Ron AKA · 15th September 2011, 04:25 PM

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.

grtyvr · 16th January 2012, 07:05 PM

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?

13th November 2010, 11:32 AM	#1
gil1 diyAudio Member Join Date: Jan 2009	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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14th November 2010, 02:10 AM	#2
AMP007 diyAudio Member Join Date: Jun 2009	easy have done it years ago , check out the pc board , you can dremel saw off the tone section

15th September 2011, 04:25 PM	#3
Ron AKA diyAudio Member 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.

16th January 2012, 07:05 PM	#4
grtyvr diyAudio Member 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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