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SSL EQ types: All you need to know

by Sarah Ella Osmond
12 April 2023

Solid State Logic is a brand that is synonymous with the recording environment. The brand are well known for their high-quality mixing consoles. In this blog, we will be exploring the different types of Solid State Logic's equalisers found on their recording consoles and outboard gear.


1. The SSL E-Series EQ

The SSL E-Series EQ is one of the most iconic equalisers in the world of recording. It was first introduced in the 1980s and quickly became the go-to EQ for many engineers. The E-Series EQ is unique in that it has a fixed-frequency design. This means that each band is set to a specific frequency, and there are no sweepable controls.

The E-Series EQ has four bands, with frequencies set at 100Hz, 200Hz, 3kHz, and 10kHz. Each band has a gain control, and there is also a high-pass filter that can be engaged at 50Hz or 120Hz. The E-Series EQ is known for its smooth sound and ability to add warmth to recordings. It's often used on vocals, drums, and guitars.


2. The SSL G-Series EQ

The SSL G-Series EQ is another iconic equaliser from Solid State Logic. It was first introduced in the 1980s as part of the SSL 4000 mixing console. The G-Series EQ is known for its punchy sound and distinct midrange.

The G-Series EQ has four bands, with frequencies set at 33Hz, 105Hz, 390Hz, and 1.6kHz. Each band has a gain control, and there is also a high-pass filter that can be engaged at 50Hz or 80Hz. The G-Series EQ is often used on drums, bass, and electric guitars.


3. The SSL E/G 4000 EQ

The SSL E/G 4000 EQ is a combination of both the E-Series and G-Series equalisers. It was first introduced in the SSL 4000 mixing console and has become a popular choice for engineers.

The E/G 4000 EQ has four bands, with frequencies set at 40Hz, 160Hz, 1.6kHz, and 6.4kHz. Each band has a gain control, and there is also a high-pass filter that can be engaged at 50Hz or 120Hz. The E/G 4000 EQ is known for its versatility and is often used on a wide range of instruments.


4. The SSL 9000 Series EQ

The SSL 9000 Series EQ was introduced in the 1990s and is still widely used today. It has a more modern sound compared to the E/G 4000 EQ and is often used on digital recordings.

The 9000 Series EQ has four bands, with frequencies set at 31Hz, 63Hz, 125Hz, and 250Hz. Each band has a gain control, and there is also a high-pass filter that can be engaged at 30Hz or 50Hz. The 9000 Series EQ is often used on vocals, bass, and acoustic guitars.


5. The SSL 500 Series EQ

The SSL 500 Series EQ is a newer addition to the Solid State Logic family of equalisers. It is designed to be used in the 500 Series format, which is a modular rack system that allows engineers to mix and match preamps, compressors, and EQs.

The 500 Series EQ has four bands, with frequencies set at 20Hz, 160Hz, 2.5kHz, and 10kHz. Each band has a gain control, and there is also a high-pass filter that can be engaged at 30Hz, 40Hz, 75Hz, or 150Hz. The 500 Series EQ is known for its transparency and is often used on vocals, acoustic guitars, and piano.


Solid State Logic is a brand that is synonymous with high-quality audio equipment. Their equalisers are no exception, and each one has its own unique sound and features. Whether you're looking for a smooth, warm sound or a punchy, modern sound, there is an SSL equaliser to suit your needs.




At Ten87 Studios we offer long term studio hire and day hire music studios. Each recording studio is acoustically treated and sound proofed to optimise any type of audio recording and music production. We are home to a large community of musicians, producers, engineers and audio professionals working in the music industry. Our main day hire studio is a world class tracking facility equipped with the best in recording studio gear, instruments, outboard and backline. We're based in Seven Sisters, Tottenham with easy transport links to the city centre - ideal for anyone looking for a London recording studio.