# Reference DAC Clock Question

**URL:** <https://forum.msbtechnology.com/t/reference-dac-clock-question/681>\
**Category:** General\
**Created:** [May 7, 2025, 9:53pm UTC](https://forum.msbtechnology.com/t/reference-dac-clock-question/681 "2025-05-07T21:53:20Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Hubbman](https://avatars.discourse-cdn.com/v4/letter/h/71e660/32.png) [@Hubbman](https://forum.msbtechnology.com/u/Hubbman)\
**Post date:** [May 7, 2025, 9:53pm UTC](https://forum.msbtechnology.com/t/reference-dac-clock-question/681/1 "2025-05-07T21:53:20Z")

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Hello MSB People,

Just a quick point of clarification needed as I look to upgrade from the Premier to the Reference.

The Reference has only (ever) shipped with the Femto 33 Clock, correct?

Bonus question: There is only one Preamp module available for the Reference, correct?

Thank you!

Mike

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**Author:** ![Dustin\_Symanski](https://yyz1.discourse-cdn.com/flex003/user_avatar/forum.msbtechnology.com/dustin_symanski/32/680_2.png) [@Dustin\_Symanski](https://forum.msbtechnology.com/u/Dustin_Symanski)\
**Post date:** [May 7, 2025, 10:37pm UTC](https://forum.msbtechnology.com/t/reference-dac-clock-question/681/2 "2025-05-07T22:37:26Z")

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Many Reference DACs shipped with the Femto 77. Especially early on (10 years ago). The Femto 33 was only shipped as standard in Reference DACs a few years ago.

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**Author:** ![Daniel\_Francis](https://yyz1.discourse-cdn.com/flex003/user_avatar/forum.msbtechnology.com/daniel_francis/32/681_2.png) [@Daniel\_Francis](https://forum.msbtechnology.com/u/Daniel_Francis)\
**Post date:** [May 7, 2025, 10:43pm UTC](https://forum.msbtechnology.com/t/reference-dac-clock-question/681/3 "2025-05-07T22:43:56Z")

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Alas, and there was a base version of the Preamp that did not include Analog inputs… it is a bit difficult to navigate! That being said, email me the Serial Number of any DAC you are considering and I can give you the original configuration and service history. Easy for us to help as needed.

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**Author:** ![Hubbman](https://avatars.discourse-cdn.com/v4/letter/h/71e660/32.png) [@Hubbman](https://forum.msbtechnology.com/u/Hubbman)\
**Post date:** [May 8, 2025, 12:36am UTC](https://forum.msbtechnology.com/t/reference-dac-clock-question/681/4 "2025-05-08T00:36:16Z")

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Hey Daniel,

I believe the SER# is RP137041. I pulled this off the Powerbase. Hopefully that’s the Ser# for the set.

Thank you

Mike

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**Author:** ![Daniel\_Francis](https://yyz1.discourse-cdn.com/flex003/user_avatar/forum.msbtechnology.com/daniel_francis/32/681_2.png) [@Daniel\_Francis](https://forum.msbtechnology.com/u/Daniel_Francis)\
**Post date:** [May 8, 2025, 2:42pm UTC](https://forum.msbtechnology.com/t/reference-dac-clock-question/681/5 "2025-05-08T14:42:27Z")

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> [@Hubbman](#):
>
> RP137041

Sounds good, I will message you directly 👍

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**Author:** ![Tahaicha](https://avatars.discourse-cdn.com/v4/letter/t/f14d63/32.png) [@Tahaicha](https://forum.msbtechnology.com/u/Tahaicha)\
**Post date:** [August 29, 2026, 6:40pm UTC](https://forum.msbtechnology.com/t/reference-dac-clock-question/681/6 "2026-08-29T18:40:31Z")

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Hello Daniel, have the same question about the clock isntalled. S/n is RD 139411.

Any help is appreciated)