Note that you may or may not have to use some sort of small, inexpensive in-line female-to-male adapter or cable to connect a Voodoo Lab power-supply cable to your given EH pedals; I don’t know what size and style/shape jack and plugs your EH pedals have… The VL ‘site has a LOT of info to help you figure out what you do or do not need; I’d be glad to help, as well, if you can’t find the info you need there.

(And by the way, I am NOT spamming or shilling for Voodoo Lab here, I don’t work for them and am not connected to or associated with VL in any way; I’ve just been very happy with the VL products I’ve bought- my rig is the quietest it’s ever been!- and I’d had to figure out some of this stuff before for myself.)

The large, rather pricey but very “pro” Voodoo Lab Pedal Power ‘MONDO’ power-supply has a number of outputs that are switchable between 9vdc and 12vdc; though some may or may not be up to the current draw (ma, milliamps) of your given pedals- just which two EH 24vdc pedals do you have, and what is the current-draw of each pedal (not necessarily the same as the current capability of the individual power-supplies)?

Two Voodoo Lab Pedal Power ‘DIGITAL’ power-supplies would likely cost a little bit less than one ‘MONDO’, but you’d also have fewer total power-supply outputs to potentially use for other pedals.

A pair of VL ‘DIGITAL’s would let you power two 24vdc pedals and leave you with a total of four more 9vdc outputs, all four of which would be relatively “high current” capable.

A pair of Voodoo Lab ‘4×4’ power-supplies (together more expensive than one ‘MONDO’) would let you power two 24vdc pedals and still leave you with a total of twelve more 9vdc outputs, four of which would be relatively “high current” capable.

I’ve found that the B9 doesn’t like to share voltage on a daisy-chained power-supply such as a Visual Sound 1 Spot; that very annoying, very noticeable constant high, droning, whining noise can result. You can simply power it with its provided power-supply, or virtually any current-capable separate 9vdc center-negative power-supply, or an isolated 9v supply such as those of the Voodoo Lab Pedal Power line of power supplies. You can still use a daisy-chained PS on other pedals connected to the B9 in your signal chain; just power the B9 with its own separate or isolated PS and you should be fine.

My Strymon pedals also need either their own individual power-supplies, or that of a good PS like a Voodoo Lab Pedal Power unit; they exhibit some odd electronic ‘hash’ in the background if powered on a daisy-chain.

I use a few of these short extension-chords, that light up with internal LED’s, to save space on my outlet-box; they’re great for wall-wart power-supplies…