Harrison Audio MR3eq EQ
Best professional EQ for precise and musical tonal shaping.
Experience the legendary console sound with this 500 Series module, designed for refined audio shaping. This third-generation equalizer features a 3-band parametric design complemented by a high-pass filter, offering a smooth, velvety tone. Its versatile controls, including proportional-Q on the mid-band and switchable shelving/bell responses for the high and low bands, allow for precise tonal adjustments. It is ideal for adding a fine, silk-like character to vocals, drums, guitars, and keyboards, making it a valuable addition to any studio rack.
$299.99
Owner Satisfaction
4.7
/ 5
Category Rank
31
/ 314
#31 in Equalizers
Price vs Category Average
-84%
Below average
Module Type
500
/ Series
Who it's for
- Audio engineers seeking vintage console tone for their mixes.
- Mix engineers prioritizing speed and musicality in their EQ decisions.
- Producers and engineers valuing a proven, industry-standard sound.
Who should skip it
- Sound designers and mastering engineers requiring extensive visual feedback.
- Home studio enthusiasts and new producers on a tight budget.
- Engineers needing ultra-transparent EQ or a completely neutral sound.
Performance breakdown
Sonic Character
Delivers that signature, velvety Harrison console warmth with effortless musicality.
Tonal Versatility
Switchable bell and shelving curves handle everything from surgical cuts to broad strokes.
Mid-Band Precision
Proportional-Q design makes carving out space in dense mixes feel incredibly intuitive.
Build Quality
Robust 500 Series construction feels built to survive decades of studio abuse.
Workflow Efficiency
Straightforward layout and clear bypass switching keep your creative momentum flowing.
Filtering Capability
The resonant high-pass filter adds useful control over low-end rumble and mud.
Key Specs
Module Type
500 Series
EQ Type
Parametric, Analog
Frequency Bands
3
Gain Range
±10 dB
High Frequency Band
800 Hz – 15 kHz
Low Frequency Band
40 Hz – 800 Hz
Mid Frequency Band
400 Hz – 8 kHz
High-Pass Filter
25 Hz – 3.1 kHz
Know before you buy
The MR3eq is designed to replicate the classic Harrison console sound, known for its smooth, velvety, and silk-like quality. It adds a refined musicality to your audio that is particularly effective for smoothing out vocals, drums, and guitars.
The proportional-Q design automatically narrows the bandwidth as you increase the amount of boost or cut. This allows for broad, gentle tonal shaping at lower gain settings and more precise, surgical adjustments when you push the gain further.
Yes, the MR3eq is a standard 500 Series module that occupies a single slot. It draws its power directly from the 500 Series rack bus, so no external power supply is required.
The high-pass filter is integrated into the signal path and is adjustable from 25 Hz to 3.1 kHz. It is a powerful tool for cleaning up low-end mud or removing unwanted rumble before you even begin applying the parametric EQ bands.
The three bands are designed with overlapping ranges—Low (40 Hz – 800 Hz), Mid (400 Hz – 8 kHz), and High (800 Hz – 15 kHz). This overlap provides significant flexibility, allowing you to use multiple bands to target the same frequency area for more complex sculpting.
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