On top of the full range of features and controls normally only seen in high end studio equipment, such as input and gain reduction metering, independent attack and release controls, a mix knob for parallel compression, and an external sidechain insert, we’ve now added a fully variable sidechain high pass filter, and a two position ‘tone + colour’ circuit which adds gentle tone sculpting and harmonic distortion, giving your bass some delicious character.
 
Features
All Analog Signal Path - no digitals in here!
Extremely Transparent - Add dynamic control without altering the original tone of your instrument
3 Compression Ratios - 2:1, 4:1 and 10:1 ratios offer lots of flexibility
Attack and Release Control - allows for ultimate control over the compression characteristics
Mix - Blend uncompressed signal in with the compressed signal for parallel compression, New York Style!
Metering - Meter both gain reduction and input on separate meters.
Tone + Color  - Adds mild harmonic distortion with a mid range cut or an upper mid range boost. 
Sidechain Send/Return- 3.5mm TRS jack send and return for sidechain compresson.  
Sidechain High Pass Filter -  a variable high pass filter that filters low frequencies from the sidechain. The filter frequency ranges from 20Hz to 400Hz.
Improved Low End Frequency Response - To handle those low low sounds, completely flat down to 20Hz.
True Display LEDs - Bright multi-color LEDs always let you know what the compressor is doing.
True Bypass - The Empress Compressor employs true bypass, so you can be sure that it's not affecting the signal when disengaged.
Small Size - New enclosure approximately half the size of the original compressor, which is delightfully small when considering all the features packed into this unit.
Beautiful Case - It has a sparkle you can't deny, available in blue or silver!
 
Specifications
Input Impedance
1M
Output Impedance
2.2k
Frequency Response (-3dB)
10Hz - 20kHz
Distortion
less than 0.1%
Noise
-101dB
Power Input Voltage
9 - 18 V DC (Negative tip)
Power Input Connector
2.1mm barrel connector (Negative tip)
Power Consumption
~ 100mA
Enclosure Material
Die Cast Aluminum
Input connector
1/4" Jack
Output connector
1/4" Jack
Height (Enclosure only)
1.5"
Height (including controls)
2.5"
Length
4.8"
Width
2.6"
Weight
1lbs