Sound Skulptor EQ573 User manual

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Document revision 1.1 – Last modification : 09/10/11
Sound Skulptor EQ 73 User manual
Introduction
The EQ 73 is based on the famous design of the classic 1073 and 1084.
It can be used as a stand alone unit through the lunchbox XLR's or in tandem with the MP 73 mic
pre, as an insert between the input and output stages, recreating the full architecture of the
1073. The switching between the two modes is done on the front panel, allowing the use of
both modes.
The EQ 73 is a three bands parametric EQ (High shelf, Mid, Low shelf) and a variable High pass
filter.
The EQ 73 enhances the possibilities of the 1073/1084 by adding several frequencies and Q's:
Stand alone installation
Insert the EQ 73 into a free slot in the lunchbox (or rack). Do not omit the 2 fixing screws on
the module front plate before moving. It is pretty heavy and the weight would put too much
pressure on the back connector.
Installation with a MP 73
You need a free slot, next to the MP 73.
Remove the jumper from the CN1 connector on the MP 73 and plug one end of the link cable
into it.
Connect the other end of the link cable to connector CN2 on the potentiometer PCB of EQ 73
then insert the EQ 73 into the lunchbox, making sure the link cable passes above the EQ
module.
XLR Connections
In the XLR mode, the EQ connects to the rear female XLR for input and to the rear male XLR for output.
In the Pre mode, the rear XLR's are simply connected as a pass-through.
The XLR pinout is as follows :
Pin 1 : Ground
Pin 2 : + Signal
Pin 3 : - Signal
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MP 73-CN1 EQ 73-CN2

www.soundskulptor.com
Document revision 1.1 – Last modification : 09/10/11
Front panel controls
High shelf Frequency (Top, outer knob)
This is a 6 positions switch that selects the frequency of the high shelf filter: 10kHz, 12kHz,
18kHz, 20kHz, 2 kHz. The Off position turns off the high shelf EQ.
High shelf Cut and Boost (Top, inner knob)
Continuously variable high shelf cut and boost from -16dB to +16dB.
Mid Frequency (Second down, outer knob)
This is a 12 positions switch that selects the centre frequency of the mid filter: 0.27kHz,
0.36kHz, 0. kHz, 0.7kHz, 1.1kHz, 1.6kHz, 2.3kHz, 3.2kHz, 4.8kHz, 7.2kHz, 10kHz. The Off
position turns off the Mid EQ.
Mid frequency Cut and boost (Second down, inner knob)
Continuously variable mid frequency cut and boost from -18dB to +18dB.
Q Switch (Higher)
In the 73 position, sets the Q of the Mid band EQ same as the 1073.
In the centre position, sets the Q same as the 1084 normal.
In the Hi position, sets the Q same as the 1084 High Q.
Low shelf Frequency (Third down, outer knob)
This is a 6 positions switch that selects the frequency of the low shelf filter: 20Hz, 3 Hz,
60Hz, 110Hz, 220Hz. The Off position turns off the low shelf EQ.
Low shelf Cut and Boost (Third down, inner knob)
Continuously variable low shelf cut and boost from -16dB to +16dB.
XLR/Off/Pre switch (Lower)
This switch is the general bypass switch for the whole EQ.
In the Off position, the EQ is bypassed.
In the XLR position, the EQ is inserted between the input and output XLR's.
In the Pre position, the EQ is inserted before the output stage of the MP 73, if installed.
High Pass filter (Bottom)
This switch sets the corner frequency of the 18dB high pass filter: 2 Hz, 4 Hz, 70Hz,
160Hz, 360Hz.
Copyright ©2011 to today SoundSkulptor