Balanced and floating output will drive any impedance from 600 ohms upwards
DI input impedance: 10Megohms
Frequency response: 20Hz to >20KHz +/-1dB
Total Harmonic Distortion: <0.075% @ 1KHz @ +20dBu
E.I.N: <-125dB @ 80dB gain
Dimensions: 19” x 2U x 11” deep (482.6mm x 88.9mm x 280mm)
Weight: 20lbs (9.07Kg)
Transformer balanced inputs and outputs
All Class A discrete transistor circuitry
Stepped gain control in 10dB steps from -10dB to +80dB
+/-5dB trim control, extends range from -15dB to +85dB
DI input with 10dB gain and 10Megohm input impedance
Unbalanced -10dBu TRS insertion jack socket, connects the GT4-8 and other Aurora products
External regulated power supply auto-senses the input voltage
Descriptions
The Aurora Audio GT4-8 is the eight channel version of the GT4-2 EQ. It is specifically designed to be paired with the GTP8 8 channel preamp. One thing you should know is that the GT4-8 does NOT have transformers! But do not worry. When you connect the GT4-8 with the GTP8 with standard TRS cables, this accesses the acclaimed Aurora Audio transformers. This enables the GT4-8 EQ to work in perfect harmony at line and mic level. Not only does this create one of the most powerful recording channels on the market, but when you combine it with the GTM822-2GN, a tracking and mixing wonderland is at your disposal.
The GT4-8 EQ features 30 selectable frequencies ranging from 33Hz to 15K. Of course the GT4-8 EQ is Class A discrete.
Geoff Tanner’s design takes that classic British EQ sound that we all know and love and expands its usability by adding some of his own touches. Let’s look at the high and low end shelving. There are two gain modes to choose from. The low gain mode gives that feel of classic EQ shelving, 8dB of boost and cut. The high gain mode gives the user 18dB for grand adjustments that you may need to do. Your ribbon microphone just a little too dark? Open up the top end at shelving starting at 3.3K! Love that mid-range of your kick drum but it doesn’t have enough low end for you? Using the high gain mode to boost the lows, you will be in bass heaven in no time at all.
The mid-range is where any EQ can show its true power. The mid-range frequencies feature THREE selectable bandwidth options to choose from. The widest curve gives you the most vintage style sound, while the narrower options enable you to get more surgical. For example, the narrow curves can help you zone in on a snare drum while not highlighting the hi hat that may be bleeding into the microphone.
The high and low pass filters are incredibly useful and musical. The LPF ranges from 3.9K to 18K and can be used for taming high frequencies or to dull something out completely. The HPF can help clean up low rumbles ranging from 22Hz to 270Hz.
The GT4-8 is a powerhouse EQ that combines the best of Geoff Tanner’s designs and Class A discrete technology. The result is a sound that sets it apart from any four band equalizer that has come before it. It is suitable for any single source and it’s also at home for making adjustments for an entire mix. Try one for yourself and understand what sets the GT4-8 above the rest.
