Moog Music Forum

Hi, i want to purchase a Midi Solutions Quadra Thru box, and my idea is to place it right after the MP, so the question i'll like to ask is: Any of you have used this box with the MP? the MP is capable of power the Quadra Thru? thanx for the help

patobrujo wrote:Is the MP-201 is capable of powering the MIDI Solutions Quadra Thru?

Hi Patobrujo,

I'll check when I get home tonight. If you don't get an answer by tomorrow
afternoon, (Wednesday) please feel free to poke me with a private message.

patobrujo wrote:Is the MP-201 is capable of powering the MIDI Solutions Quadra Thru?

Hi Patobrujo,

Great news! It seems that not only can the MP-201 power MIDI-powered boxes
via its MIDI Out jack, it can also power devices from its MIDI In jack.

I used a Midi Solutions Thru (one In, two Outs) which should be close enough
to assume it works for your needs as well. Yay Moog!

A Midi-in can't drive what ever unit, because of it opto-coupler connection only. There is not voltage exchange from the external source into a midi in. And of cause no voltage from the midi in to the sender.
This was clever designed to avoid ground loops and hum through the midi connection.

till wrote:A Midi-in can't drive what ever unit, because of it opto-coupler connection only.
There is not voltage exchange from the external source into a midi in. And of
cause no voltage from the midi in to the sender.

Hi till,

There are two ways to approach research. The first is to read what other
people have written and then automatically conclude that it must be true.
(The beauty of this method is that it takes very little time, money, or effort.)

The other method is to actually try what you're researching and then come
to a conclusion based on actual results that you've just observed.

Here are the steps I used to research this (using the second method above):

I used an MP-201 and a MIDI Solutions Thru box that clearly has no internal
power supply.

When I plugged the MIDI Out of the MP-201 to the MIDI In of the box, the red
LED on the MIDI Thru box came on indicating the box was getting power.

When I plugged the MIDI In of the MP-201 into the MIDI Thru of the box, the
red LED on the MIDI Thru again came on indicating the box was getting power.
(There were no other cables connected to the MIDI Thru box at that time.)

I made certain that there were no Tesla coils operating anywhere in the
vicinity of this test that might have supplied power wirelessly through the air.

My conclusion, as stated in my previous post, is based on these two tests.

If you actually try this experiment yourself with an MP-201 and get different
results, please let me know as it may indicate that I have an aberrant MP-201.

Thanks a lot Dan!! mi Quadra thru it's on its way so this are great news, now i have to wait 2-3 weeks to repeat your experiment and see if we can convince till. I must say that everything i have read (first metod), it's what till just wrote... but if the red light it's on, then it's on. If you give me a couple weeks i'll get back to you with the results...

Thanks again for the time and help, cheers

_DemonDan_ wrote:

till wrote:A Midi-in can't drive what ever unit, because of it opto-coupler connection only.
There is not voltage exchange from the external source into a midi in. And of
cause no voltage from the midi in to the sender.

Hi till,

There are two ways to approach research. The first is to read what other
people have written and then automatically conclude that it must be true.
(The beauty of this method is that it takes very little time, money, or effort.)

The other method is to actually try what you're researching and then come
to a conclusion based on actual results that you've just observed.

Here are the steps I used to research this (using the second method above):

I used an MP-201 and a MIDI Solutions Thru box that clearly has no internal
power supply.

When I plugged the MIDI Out of the MP-201 to the MIDI In of the box, the red
LED on the MIDI Thru box came on indicating the box was getting power.

When I plugged the MIDI In of the MP-201 into the MIDI Thru of the box, the
red LED on the MIDI Thru again came on indicating the box was getting power.

I made certain that there were no Tesla coils operating anywhere in the
vicinity of this test that might have supplied power wirelessly through the air.

My conclusion, as stated in my previous post, is based on these two tests.

If you actually try this experiment yourself with an MP-201 and get different
results, please let me know as it may indicate that I have an aberrant MP-201.

hahahahahaha

Hi guys, well i recieved my Quadra Thru Box so i drive the experiment that Demon_Dan describes a few posts above....

When i plugged the midi out of the MP to the midi in of the box the red light is on, so the Quadra is getting power.

When i plugged the midi in of the MP to any midi thru of the box no red light, so the Quadra is not getting power from the midi in of the MP.

Dan, i guess you have an aberrant MP , anyway, thanks for your help!!

patobrujo wrote:When I plugged the MIDI In of the MP to any MIDI Thru of the box no red light,
so the Quadra is not getting power from the MIDI In of the MP. Dan, I guess
you have an aberrant MP.

I thought it was bizarre when I saw mine do that, but I tried the process several
times to be certain I was really seeing it getting power from the opposite end.

I suddenly feel so un-isolated