Please note: If you are using the EQ-73 with the PS-AC4 or with the bigger power adaptor used by the PRE-73, please change the internal fuse to a slow blow one with a rating of 1,25 or 1,5 A.
If you want to use the EQ-73 as a self contained unit, a customer suggested complementing them with this low cost unit:
It will convert the low level and unbalanced Insert jack of the EQ-73 to balanced +4dBu ones that can interface with all your other studio gear.
The customer tried it and said it worked great.
The class-A circuit used in the EQ-73 is similar to the eq section in the classical 1073 module, without the high pass filter. Additional frequencies have been added and the mid frequency band uses two inductors, the higher value of the second one is used for the two lowest frequencies, 160 Hz and 240 Hz, to achieve a suitable response.
The sound character is warm, punchy, sweet and musical. These classic characteristics 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 essence of this sound is now available at a surprisingly low cost, making it available to nearly everyone.
The EQ-73 has stepped frequency controls that offers a wide selection of frequencies from 20 Hz to 24 kHz.
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.
There are separate bypass switches for all three bands.
The EQ-73 is made to be used together with one of our PRE-73 models that has an Insert jack. It can also be used with many other units that has a low level insert jack.
Combining a PRE-73 and an EQ-73, and using a UNITE rack kit to mount them together, one will get a 19-inch 1073-style unit at a low cost and with a great sound!
– Vintage Style electronics. No intergrated circuits in the signal path
– 3-band with a dual inductor based mid frequency band
– Stepped frequency selection
– A wide selection of frequencies from 20 Hz to 24 kHz
– Control range up to +/- 18 dB
– Separate Bypass switches for each band
– Tantalum capacitors in the signal path
– Made to be used together with one of our PRE-73 models with an Insert jack or any other unit with a low level Insert jack
– TRS jack for in-and output connection, the nominal working level is around 18 dBu
– Selectable ground lift switch
– External power supply to avoid interaction with the audio circuits
– Great sound that suits most sound sources and genres
– A solid build quality that will last many years of normal use