I'm not familiar with that Pyle unit but, by way of a gross generalization, matching transformers shine when you need to go from unbalanced to balanced and when you're dealing with circuits that are super finicky about impedance. The downside is that there's usually a strong correlation between price and distortion. Your solution might be as simple as turning the output level down on the MAudio box and turning the input level down on your powered speaker. If that doesn't work, you could probably use an inexpensive L-pad plugged in just before the signal hits the PA. If Radio Shack still existed you could buy a dollar's worth of resistors locally and roll your own. JB
On Oct 5, 2025, at 12:42 AM, John Moore via groups.io <bigfish=pacbell.net@groups.io> wrote:
I'm thinking of trying to use this box to take the +4db main output of an M-Audio M-Track Duo to -10db consumer level to feed a powered PA Speaker/Amp unit that has consumer level RCA inputs. There are more active units but they cost more. This is a one off Zoom Comedy show for a non profit meeting hall I attend so I'm not trying to get super picky. The fact that it seems bi-directional and has a attenuator I'd think the -20db setting would take the +4 signal down to the consumer level -10db ballpark. Pyle Premium Direct Injection Audio Box - 2.36" x 4.09" Passive DI Unit Hum Eliminator w/ Input Attenuator to Connect Guitar & Bass, 1/4'' Impedance Transformer Connector to Balanced & Unbalanced XLR
John Moore Barking Trout Productions Studio City, CA bigfish@pacbell.net
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