W W W . G O L D E N A G E P R O J E C T . C O M
I
EQ-573
INTRODUCTION
Congratulations on choosing the Golden Age Project EQ-573 equalizer!
The class-A circuit used in the EQ-573 is similar to the eq section in the classical
1073 module. Additional frequencies have been added to the mid and high frequency
sections. The signal path uses only discrete components like resistors, capacitors,
inductors and transistors.
The sound character is warm, punchy, sweet and musical. These classic character-
istics have been heard on countless recordings through the years and it is a versatile
sound that works very well on most sound sources and in most genres.
The EQ-573 has stepped frequency controls that offers a wide selection of frequen-
cies from 33 Hz to 20 kHz. Each section can be switched off individually. There is also
a master bypass switch for easy comparisons.
The low and high frequency bands are shelving and the mid frequency band is of the
bell type. The control range is +/-15 dB for the two lower bands and +/- 18dB for the
high frequency band.
The high pass fi lter is of the inductor type with a slope of 18 dB / octave.
The EQ-573 cannot be used as a standalone EQ. It is designed to be used together
with the Golden Age Project PRE-573 that has an insert connector.
Combining the PRE-573 and the EQ-573 in a 500 Series rack, one will get a 1073-style
unit at a low cost and with a great sound!
Features:
- Vintage Style electronics. No integrated circuits in the signal path
- 3-band with a dual inductor based mid frequency band
- Inductor based high pass filter
- Stepped frequency selection
- Control range up to +/- 18 dB
- A wide selection of frequencies from 33 Hz to 20 kHz
- Each section has can be switched off individually
- Master Bypass switch
- Tantalum capacitors in the signal path
- Circuit board star grounding scheme
- Great sound that suits most sound sources and genres
- A solid build quality that will last many years of normal use
- Designed to be used together with the Golden Age Project PRE-573
