H90 Stereo Summing?

[Herr Mosa]

In the meantime, I am rebuilding my pedalboard with the H90. I have a Looperwerk connection panel on my pedalboard that allows me to sum a dual TS jack output to mono when connecting only one external plug:
“…If a certain external socket is not used, the mono signals present at both internal sockets are summed to the other external socket via a passive resistor network…”

Is this analog method the same as if I only use one output on the H90 or are there sound differences, possibly due to dedicated monophonic algorithms?

By the way, for those of us who use the H90 in the first of two rows on the pedalboard, it can be challenging to find the USB-C port after connecting all the cables 😉 This was easier on the H9.

I have now permanently connected a USB-C cable, which remains rolled up on site when not in use. I hope this doesn’t create any additional interference when it stays plugged in…

[joecozzi]

Herr Mosa wrote:

Is this analog method the same as if I only use one output on the H90 or are there sound differences, possibly due to dedicated monophonic algorithms?

No, this is not the same. External mono summing is good enough when you’re in a bind and need to work with a mono summed signal. For example, you’ve wired up your board in stereo, but now face a situation where only one amp is present. In general, for optimal performance, you should try to come out of the H90 with one cable from Out 1 only in insert mode or Out 1 and/or Out 3 when using Dual routing mode.

Check out this video for an in-depth explanation: https://youtu.be/a6XH5zEeR4o?feature=shared

[Herr Mosa]

Thank you Joe for for the clarification and link that explains the difference – I’m cured 😉

[Author]

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