external power supply question, will it work??

hey forum, quick question regarding external power supply units for a preamp.  the original amp manufacturer does have an optional supply to replace the dinky wall wart (rather pricey), but there are also many available external power supplies from other manufacturers.  my question is, can i use any external supply that has the correct voltage (appears to be 24v in the case of this unit), and expect it to work, or are there other specifications that must be met for compatibility, and if so, what should i look for?

thanks for any assistance / info the forum can provide.
If the wallwart’s a 24V unit, another 24V supply should work, providing it has the current capability, required by the preamp.
You need voltage AND current.

However, the problem is finding a high quality, low noise unit. You can find several wall warts which are digital and noisy as can be.

I can highly recommend Astron power supplies as great, low noise, general purpose units.

To be clear,
Voltage should match, but current can be over.
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