Introduction; 1073 Channel Amplifiers; High Pass Filter (Resistor Modification) - Neve 1073 User Manual

1073 & 1084 Channel Amplifiers

High Pass Filter (resistor modification)

These 45 series modules are the same as the original designs, and contain
all of the original components

1073 Channel Amplifiers

These very popular sounding mic pres are considered by many to capture
the very essence of the Neve sound. In manufacture since the early
1970s, the Class A design offers 3 bands of EQ with one fixed high
frequency and a high pass filter.
1084 Channel Amplifiers
Based on the same technology as the 1073s, the 1084s again deliver the
unique sound and quality of Neve. However, the 1084s offer additional
features, including 3 switchable EQ bands with cut and boost, a high Q for
presence and low pass/high pass filters.
Important Note
The high pass filter in both the 1073 & 1084 modules is a passive
design and as such must be correctly terminated to achieve a
maximally flat response.
In order to achieve this there is a 5k1 resistor fitted inside the
module on the back connector between pin E (0v) and pin K (fader
send) see diagram below:
In situations where the fader connection is not used (most Neve 45
u
series consoles except the original BCM10's) then the resistor remains in
place.
In situations where the fader connection is used (BCM10's and AMS
u
Neve 1073/1084 racks) then the 5k1 resistor should be disconnected and
replaced with a fader or potentiometer whose value is 4k7 / 5k ohms.
In the new 2016 BCM10, the 5k1 resistor value needs to be changed,
please contact AMS Neve for the appropriate resistor value.
Failure to do so will result in incorrect levels and uneven
frequency response.
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Introduction