Another impedance enquiry (Weber Z matcher)

[thegame]

If faced with the first world problem of wanting to simultaneously run 8 and 16 ohm cabinets from a single amp, it looks like this device may be a good solution. In fact I think it's the only option other than obtaining a second power amp/load box, etc.

https://www.tedweber.com/z-matcher/
https://reverb.com/ca/item/32290280-weber-z-matcher-100-impedance-matcher

Assuming one 8 ohm and one 16 ohm cab, there are two hook up options

Amp speaker output 1 into 16 ohm cabinet
Amp speaker output 2 into the Z-matcher set to 16 ohms
Amp impedance set to 8 because it's seeing two 16 ohm loads
Z-matcher speaker output set to 8 ohms into 8 ohm cabinet

Or by reversing the cabs:

Amp speaker output 1 into 8 ohm cabinet
Amp speaker output 2 into the Z-matcher set to 8 ohms
Amp impedance set to 4 because it's seeing two 8 ohm loads
Z-matcher speaker output set to 16 ohms into 16 ohm cabinet

Anyone have feedback on this Z-matcher unit?

 

[7704A]

I bought two blemished units at a discount just before they started painting them all black. Useful tool, appears to do what it says on the tin. I have not measured with a scope or anything, but on my amps that can tolerate mismatches I've switched around the settings and heard volume changes along the lines of what I expected. Feels pretty solid in build. When it arrived the transformer bolts were a little loose so I snugged those up. There was also a wire pinched between the two halves of the chassis on one unit, but it was straightforward to unscrew the chassis, reposition the wire, and then screw things down again. I'd say that the pots on the front could use lock washers if they don't come with them, the nuts seem to either work loose or not bite enough by themselves. The solder joints inside look pretty good to me, but not always with the best mechanical bond prior to soldering, if I'm seeing things right. Looks like some wires were held to the terminals then soldered in place. Joints themselves look fine though. I have not tried using the unit at full rated power yet (100W is a bit much for most of my gigs), and I have not tried using the line-out yet nor verified that the balanced out is actually balanced.

Gut shot of one of mine: