ISA 220 Session Pack is a single-channel analog processor that includes a precision Mic preamp, flexible EQ section, Compression/Limiting, and a De-esser in one high-quality channel strip. With Focusrite's renowned sound quality, and its flexible design, the ISA220 Session Pack provides audio professionals, in both music and post-production, with a complete channel-strip solution at a competitive price.
Key Features
Tone
Classic Focusrite transformer based microphone preamp
Filter and EQ
4-band EQ with Hi/Low-pass filters
Compression
Proprietory Focusrite discrete Class-A VCA compressor side chain design for lower distortion and noise performance
De-esser
New De-esser design based on optical technology for lower distortion and transparency, with "De-esser Listen" for precise control over sibilance
New Blend Feature
Adds dynamics into the compressed signal path
Limiting
Frequency adaptive limiter helps avoid critical digital clipping
Metering
Precision VU metering of input or compression gain reduction
1 x XLR Microphone 1 x XLR Line 1 x 1/4" TRS phone Instrument (rear panel) 1 x XLR External Signal 1 x 1/4" TRS phone Compressor Insert
Outputs
1 x XLR
Frequency Response
Not specified by manufacturer
Noise
Mic: EIN - 123dB with 150 ohm input resistance at 60dB of gain Line: -96dBu
Preamp
Gain Range
0dB to +60dB in 10dB steps
Maximum Output
+26dBu
Input Impedance
1.2k ohm
Phantom Power
+48V
Compressor
Threshold Range
-28dB to +12dB
Ratio
1.5:1 to 10:1
Attack Time
500uS to 25mS
Release Time
100mS to 7S, variable or auto (program dependent)
Slope
Soft knee
Sidechain
Yes
Equalizer
Filter Type
Parametric, shelving, low- and high-pass
Frequency Bands
Parametric
LMF: 40Hz to 400Hz
LMF (x3 in): 120Hz to 1200Hz
HMF: 600Hz to 6kHz
HMF (x3 in): 1.8kHz to 18kHz
Filters (18dB/Octave, 3rd Order)
LPF: 400Hz-22kHz
HPF: 20Hz-1.6kHz
Shelving
High and Low frequency shelving sections each with continuously variable boost/cut with centre detent, and a four position rotary switch for selection of rolloff frequency
Range (Boost/Cut)
+/-18dB
Limiter
Threshold Range
22dBu
Ratio
Infinite (brick wall)
Attack Time
Fast
De-Esser
Threshold Range
22dBu
Frequency Range
2.2kHz to 9.2kHz
Gate
Gate Threshold
Not applicable
Gate Rate
Not applicable
Physical
Dimensions (WxDxH)
19" x 9 7/8" x 3 1/2"
Weight
15.4 lbs
Specialties
"Blend" function in the compressor module. This allows the user to blend compressed signal with uncompressed signal, in the way that many producers do via the faders of an external mixing console