Focusrite Pro ISA TWO Dual Mono Microphone / Instrument Preamplifier

OUR PART #: ISATWO MFR #: AMS-ISA-2

Copied to clipboard
Focusrite Pro ISA TWO Dual Mono Microphone / Instrument Preamplifier Image 1
Focusrite Pro ISA TWO Dual Mono Microphone / Instrument Preamplifier Image 2
Focusrite Pro ISA TWO Dual Mono Microphone / Instrument Preamplifier Image 3
uDtdXD5DJyw
1 Video
Focusrite Pro ISA TWO Dual Mono Microphone / Instrument Preamplifier
Our Price: $899.99
List Price: $1,129.99
You save 20%!

SPECIAL FINANCING AVAILABLE

Synchrony Music & Sound Card
$25/mo* with 36 month financing. ‡
Limited Time. Learn How

Questions? Contact our
Sales and Service Pros for expert
advice and package pricing.

800-356-5844

Email customer service

Accessories

Product Overview

The Focusrite ISA Two dual-mono rackmount mic pre is the ideal solution when only two inputs are needed but with superb quality sound: two independent channels of the highest quality classic Focusrite mic pres, with line in and front-panel instrument inputs – no DI box required. Based on the legendary designs found in the Focusrite Forte and Studio Consoles, ISA Two is the ideal front-end for your rack.

And now you can add the iconic sound, feel, and styling of the legendary Focusrite console to your production toolkit simply by registering your ISA Two. The Bx_console Focusrite SC is a virtual channel strip from the original console featuring the ISA 110 EQ and ISA 130 dynamics module including the compressor/limiter, expander/gate, and de-esser. The plugin is an SC VST/AU/AAX compatible plug-in for Mac and PC, and yours for free upon registration, a $349 value!

Focusrite’s microphone preamplifiers go back to the original Focusrite ISA 110 modules when Rupert Neve was commissioned by George Martin in 1985 to create a no-compromise channel strip for his Neve console. Combining the very best solid-state electronics with transformer coupling, Focusrite mic pres have played a key part in the recording of hundreds of hit records and they’re the choice of leading artists, producers, and engineers around the world.

At the heart of the ISA Two is a pair of Lundahl LL1538 transformers. ISA products have relied on Lundahl from the beginning since their components were originally specified in 1985. The LL1538 features a 3-section winding, resulting in very low leakage inductance and, as a result, an extended frequency response. They’re encapsulated in mu-metal cans to shield them from stray magnetism.

ISA Two features two classic Focusrite mic preamps, with four impedance settings including the original ISA 110 setting. Variable input impedance allows you to go for an accurate, transparent sound or choose to highlight the character of your favorite vintage mic – and anywhere in between. With up to 80 dB of low-noise gain, ISA Two can perform in the most demanding situations - really bringing your ribbon, condenser, or moving coil mics to life.

Each channel has a fully-balanced insert point accessed via TRS sockets on the rear panel and activated with a front-panel button, so it’s easy to use outboard processors with the ISA Two. Just plug in your choice of EQ, compressor, or limiter.

Features

  • Lundahl LL1538 mic input transformer
  • Up to 80 dB of gain
  • Variable input impedance
  • User-calibrated metering
  • Front-panel instrument and rear panel line inputs
  • Variable cut-off high-pass filter
  • Rear panel balanced inserts

Specifications

  • Front panel, per channel:
    • 1/4" instrument input
    • Variable input impedance - Low, ISA 110, Medium, High
    • Input selection - Mic, Line, Instrument
    • 0 - 30 dB/30 - 60 dB gain switch
    • Phantom power switch
    • Phase invert switch
    • 0 - 60 dB gain in 10 dB steps
    • 0 - +20 dB continuously variable trim
    • Variable high-pass filter with on/off switch
    • Insert point on/off switch
    • Eight-LED user-calibrated level meters
    • Single power switch
  • Rear panel, per channel:
    • XLR-F mic inputs
    • 1/4" TRS line inputs
    • 1/4" TRS Sends
    • 1/4" TRS Returns
    • XLR-M line output
    • Single peak meter calibration dial
    • Single IEC power socket
  • Dimensions (WxDxH): 18.9" x 11" x 1.7" (480 x 280 x 44 mm)
  • Weight 8.2 lbs (3.7 kg)
  • Maximum Input and Output Levels
    • Maximum Output Level: +24dBu with a THD+N < 0.01% @ 1kHz measured with 150 Ω source impedance and 22Hz - 22kHz band-pass filter
    • Maximum Microphone Transformer Input Level: +7dBu with a THD+N < 0.7% @ 1kHz measured @ 0dB of gain with 150Ω source impedance and 22Hz - 22kHz band-pass filter
  • Mic Input Response
    • Gain range: 0dB to +60dB in 10dB steps, plus 0dB to +20dB continuously variable trim
    • Input Impedance: Switched Impedance setting;
    • Equivalent Input Impedance at 1 kHz
      • Low = 600 Ω
      • ISA 110 = 1.4 kΩ
      • Med = 2.4 kΩ
      • High = 6.8 kΩ
    • EIN (Equivalent Input Noise): Measured @ 60dB of gain with 150Ω source impedance and 22Hz-22kHz band pass filter; -127 dB
    • Noise: Noise at output with unity gain (0dB) and 22Hz-22kHz band pass filter; -97dBu
    • Signal-to-Noise Ratio: Measured with 150Ω source impedance and 22Hz-22kHz band pass filter; 121dB relative to max output +24dBu
    • Total Harmonic Distortion + Noise: Measured with a -20dBu input signal @ +30 B of gain and with a 22Hz-22kHz band pass filter < 0.0007% at 1 kHz
    • Frequency Response:
      • At minimum gain (0 dB-): 5dB @ 10Hz,
 -1dB @ 135kHz, relative to 1kHz
      • @ +60 dB gain: -6 dB @ 10 Hz, -1 dB@ 115 kHz, relative to 1 kHz
    • CMRR (Common Mode Rejection Ratio)
      • -94 dB for mic input @ 60 Hz for max. output = +24 dBu
      • -91 dB for mic input @ 10 kHz for max. output = +24 dBu
    • Crosstalk(Channel to Channel): Mic input, with I/P = 0dBu, gain = 0dB @ 1kHz input to channel A, channel B output = -85dB
  • Line Input Response
    • Gain range: -20dB to +10dB in 10dB steps, plus 0dB to +20dB continuously variable trim
    • Input Impedance: 10kΩ from 10Hz to 200kHz
    • Noise: Noise at main output with gain at unity (0dB) measured with 50Ω source impedance and a 22Hz - 22kHz band pass filter -97dBu
    • Signal-to-Noise Ratio: Measured with 50Ω source impedance and a 22Hz-22kHz band pass filter; 121dB relative to max output +24dBu
    • Total Harmonic Distortion + Noise: Measured with a 0dBu input signal, +10dB of gain and a 22Hz-22kHz band pass filter < 0.0002% at 1kHz
    • Frequency Response: At minimum gain (0 dB)--0.3dB at 10Hz, -1dB at 80kHz, relative to 1kHz
    • Crosstalk: (Channel to Channel)
    • Line input, with I/P = 0dBu, gain = 0dB @ 1kHz input to channel A, Channel B output
= -91dB
  • Instrument Input Response
    • Gain range: +10dB to +40dB continuously variable trim
    • Input Impedance: 2MΩ
    • Noise: Measured with 22 Hz-22 kHz band pass filter - Minimum gain (+10dB) = -95dBu
  • Frequency Response
    • At minimum gain (+10dB) -0.1dB at 10Hz,
-1dB at 115kHz, relative to 1kHz
    • At maximum gain (+40dB) -2.5dB at 10Hz, 
-1dB at 110kHz, relative to 1kHz
  • High-Pass Filter
    • Roll-Off: 18dB per octave (3 pole filter)
    • Frequency Range: Continuously variable from 16Hz to 420Hz (-3dB)

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

Product Documents

Click to download

Product Videos