Audiophile-grade fuses for MSB DACs and amplifiers

Has anyone experimented with replacing the fuse in MSB’s DACs or power amplifiers with an audiophile-grade fuse, especially for the high-performance Cascade DAC?

There are many companies producing audiophile-grade fuses for audio components, including the external Swiss Digital Fuse Box from Vera Fi Audio (Swiss Digital Fuse Box Only – Vera-Fi Audio LLC).

It would be very interesting to know whether MSB optimized their fuse selection process to get the best possible performance from their DACs and power amplifiers. Or is it even recommended to replace the fuse in an MSB product?

I know many people change out their fuses. As long as you match the fuse type (slow blow) and current rating, you are good to do this! This is why we made the fuses externally changeable on most of our products, as it eliminates the need to open the unit up.

In regards to the “digital” fuse box, from a safety perspective, I would never use it. It requires you to remove the safety fuse from your audio equipment and replace it with a solid jumper. From an engineering and safety perspective relying on a relay to open is not safe. If you put lots of current through a relay it can weld its contacts so it will never open. This isn’t just theory, I’ve personally seen it happen even with the best relays. This is why the world uses fuses for safety.

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I am using Synergistic purple in my select power bases. Big improvement. One Synergistic Orange is in universal transport power supply. Remember, they are oriented. It is a good thing Msb has now fuses externally changeable, not in my Select II and transport power.
Harri

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Thank you @Jonathan_Gullman.
That is very helpful. :blush:

May I ask what orientation of the fuses do you feel sound better in your Select II and transport power base?

We looked the energy flow from IEC-onwards to the transformer. My expert friend said it easily. Then we also realised that power cord schuko ( in Europe) had been wrong, and flipped it. Usually hot in IEC is right side if you look the connectors. In Select power input, it is left side). Did it affect the sound—yes, a lot.

@Daniel_Francis please can you confirm us the right pin IEC scheme of:

S202 (new 2023)
Reference PowerBase (new 2024)
Reference DD (refurbished 2024)

Looking at the cable the phase is always on the right, according to EU rules, like in the pics below (the hole #1)


Can you confirm that this orientation is compliant with IEC sockets of MSB devices?



TIA

Thanks for sharing your precious experience.

Thanks for your feedback @Harri.
Have you tried the SR Master fuse?

This is the “normal” for IEC connectors (L is hot). However, as you have pointed out, the Schuko plugs can be plugged in either way, so we designed our equipment to work either way. They are all designed the same, so I do recommend making sure the phase is the same between all the equipment.

In our listening room, we run 240V, so both of our phases have power on them (120V out of phase). We match the phases so the equipment is all the same.

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Thanks, Jonathan.

I have all my Schuko wall sockets installed by the electrician with phase on the right side hole. It means that all my power cords have the IEC connector with L correspondingly (exactly like your pic above).

I also have a polarity test that I use to check all my power cords once plugged into the wall to be sure that L (phase) on the IEC connector is always at the right position.

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