Hello,
It is common to think that the Behringer EP1500 is a QSC RMX1450 clone.
Recently I have found the following.
Go to the QSC website to see the RMX1450 pictures (of its modules):
http://www.qscstore.com/rmxmodas.html
If you have a Behringer EP1500, you will see that the modules
do not look the same as in your Behringer.
Look on the volume control, look on the orientation of the
ribbon connector, look on the parts which appear and not appear
on, e.g., the module of channel 2.
So, I suggest that it is not exactly the same circuit.
Guy
It is common to think that the Behringer EP1500 is a QSC RMX1450 clone.
Recently I have found the following.
Go to the QSC website to see the RMX1450 pictures (of its modules):
http://www.qscstore.com/rmxmodas.html
If you have a Behringer EP1500, you will see that the modules
do not look the same as in your Behringer.
Look on the volume control, look on the orientation of the
ribbon connector, look on the parts which appear and not appear
on, e.g., the module of channel 2.
So, I suggest that it is not exactly the same circuit.
Guy
Thanks! Now I understand.
How it all started, I wanted to make changes in my EP1500.
So, I look at the QSC RMX145 schematics.
It turns out that the part number (on the PCB) are not the same
and the layout too.
What I wanted to is the following (when I am looking on the
QSC schematics):
1. Put the input directly to the (-) leg of U101:2 (bypassing the
the volume control) and disconnect U101:1 from the ccircuit.
Remove all the 30,50Hz filtering and just remain the 20K
resistor as a load for the input.
2. Disconnect diodes D102 and D105 and by that remove the
action of the "clipping sensing bridge"
The problem is that I do not see exactly which part is which,
since the numbers are not the same as in the QSC schematics.
This ask for deep inspection in the Behringer PCB.
Thanks again,
Guy
How it all started, I wanted to make changes in my EP1500.
So, I look at the QSC RMX145 schematics.
It turns out that the part number (on the PCB) are not the same
and the layout too.
What I wanted to is the following (when I am looking on the
QSC schematics):
1. Put the input directly to the (-) leg of U101:2 (bypassing the
the volume control) and disconnect U101:1 from the ccircuit.
Remove all the 30,50Hz filtering and just remain the 20K
resistor as a load for the input.
2. Disconnect diodes D102 and D105 and by that remove the
action of the "clipping sensing bridge"
The problem is that I do not see exactly which part is which,
since the numbers are not the same as in the QSC schematics.
This ask for deep inspection in the Behringer PCB.
Thanks again,
Guy
EP1500 schematic is the same as the QSC, as is theTapco J-1400.
If you compare the J-1400 with the QSC you will find every part value and even the reference designators (R1, Q1, C1, etc) the same.
The Tapco amps weigh more than any of the clones, they have bigger transformers, yet are not much more $$$ than the Behringer and Alto, but are a lot less $$$ than QSC.
If you compare the J-1400 with the QSC you will find every part value and even the reference designators (R1, Q1, C1, etc) the same.
The Tapco amps weigh more than any of the clones, they have bigger transformers, yet are not much more $$$ than the Behringer and Alto, but are a lot less $$$ than QSC.
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