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Now that I have seen a schematic for the Peavey 800 Super Festival Booster Amp (and thanks again Dmeek), I am looking to hijack a design idea (albeit simple and crude) to incorporate into a regular ole Peavey Monitor 260 Amp that I have.
I want to take an XLR direct out from my Fender Acoustasonic 90 amp and run it into the Peavey Monitor amp. The Monitor 260 does not have an XLR input. It has two 1/4" jacks. (And that is why I was asking about the Booster 400 / 800 amps).
If you look at the Peavey design on the 800 Booster Amp, it appears they are merely putting a 600:50K matching transformer across the Hi Z input. I do believe your standard low end Proco, Livewire, Rolls, etc type passive DI box has a 600 Ohm to 50K transformer. Of course, the typical use is to go from a Hi Z connection to the Low Z end to drive a mixer board or other preamp. I am thinking these devices should be bi-directional and work ass-backward? And if that is the case, I could scavenge a transformer from a cheap DI box and use it on a Peavey Monitor amp. I would take out one of two 1/4" jack, retrofit a female XLR in it's place, add some resistors as shown on the 800 schematic, and connect it to the existing circuitry of the Monitor amp input.
The one thing I am concerned with is making sure this type of cheapo transformer can handle the signal coming out of the Acoustasonic amp's Direct Output. Maybe there should be other considerations I should ponder.
For now, I have sketched out what I think would be the retrofit into the Monitor 260 input.
I guess the other option is to try a direct box between the Acoustasonic and the Peavey, no extra resistors, etc?
Does this look reasonable?
Now that I have seen a schematic for the Peavey 800 Super Festival Booster Amp (and thanks again Dmeek), I am looking to hijack a design idea (albeit simple and crude) to incorporate into a regular ole Peavey Monitor 260 Amp that I have.
I want to take an XLR direct out from my Fender Acoustasonic 90 amp and run it into the Peavey Monitor amp. The Monitor 260 does not have an XLR input. It has two 1/4" jacks. (And that is why I was asking about the Booster 400 / 800 amps).
If you look at the Peavey design on the 800 Booster Amp, it appears they are merely putting a 600:50K matching transformer across the Hi Z input. I do believe your standard low end Proco, Livewire, Rolls, etc type passive DI box has a 600 Ohm to 50K transformer. Of course, the typical use is to go from a Hi Z connection to the Low Z end to drive a mixer board or other preamp. I am thinking these devices should be bi-directional and work ass-backward? And if that is the case, I could scavenge a transformer from a cheap DI box and use it on a Peavey Monitor amp. I would take out one of two 1/4" jack, retrofit a female XLR in it's place, add some resistors as shown on the 800 schematic, and connect it to the existing circuitry of the Monitor amp input.
The one thing I am concerned with is making sure this type of cheapo transformer can handle the signal coming out of the Acoustasonic amp's Direct Output. Maybe there should be other considerations I should ponder.
For now, I have sketched out what I think would be the retrofit into the Monitor 260 input.
I guess the other option is to try a direct box between the Acoustasonic and the Peavey, no extra resistors, etc?
Does this look reasonable?
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