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 Post subject: Re: Broskie's Unbalancer
PostPosted: May 4th, 2023, 8:46 am 
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Joined: January 13th, 2016, 9:14 pm
Posts: 823
Stuart,
An observation.

The E70V has an excellent "digital" attenuator in the AK4499 DAC. A 32bit DAC is designed to do both 20-24bit DAC + 8-12bit digital attenuator. Since the output of the DAC is an R2R Ladder DAC, very similar to the stepped attenuator version you have from P-E.

A thing to try is dropping the DAC output down 24dB with the volume control and maxing out the VC on the line stage. That is a really good way to see if there is any difference in sound quality.

I found using the E70V volume control and maxing out the HPA VC had better sound quality.

Just a thought.
Rich


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 Post subject: Re: Broskie's Unbalancer
PostPosted: May 4th, 2023, 9:11 am 
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Joined: July 24th, 2015, 4:17 pm
Posts: 1709
Location: Parkville, Maryland
ZOWIE! You've been busy dotting the i's and crossing the t's. The Miflex caps are a major find. They certainly transformed my speaker crossovers to beyond expectations.

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 Post subject: Re: Broskie's Unbalancer
PostPosted: May 4th, 2023, 2:22 pm 
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Joined: December 14th, 2013, 2:19 pm
Posts: 960
HAL wrote:
Stuart,
An observation.

The E70V has an excellent "digital" attenuator in the AK4499 DAC. A 32bit DAC is designed to do both 20-24bit DAC + 8-12bit digital attenuator. Since the output of the DAC is an R2R Ladder DAC, very similar to the stepped attenuator version you have from P-E.

A thing to try is dropping the DAC output down 24dB with the volume control and maxing out the VC on the line stage. That is a really good way to see if there is any difference in sound quality.

I found using the E70V volume control and maxing out the HPA VC had better sound quality.

Just a thought.
Rich


That's a super easy "mod" to try. Thanks Rich, I'll let you know if the difference shows up in my rig.

Stuart


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 Post subject: Re: Broskie's Unbalancer
PostPosted: May 4th, 2023, 2:23 pm 
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Joined: December 14th, 2013, 2:19 pm
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SoundMods wrote:
ZOWIE! You've been busy dotting the i's and crossing the t's. The Miflex caps are a major find. They certainly transformed my speaker crossovers to beyond expectations.


My thanks to Charlie for letting me know about them.


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