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FOCUSRITE ISA Two

FOCUSRITE ISA Two


Proizvođač: FOCUSRITE ISA Two
Dostupnost: Nema na stanju
Šifra Proizvoda: 80280
Prikazana cena je za komad.

You may only need a couple of mic preamps, but they need to be the very best. The ISA Two dual-mono mic pre is the ideal solution: 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.


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ISA Two


You may only need a couple of mic preamps, but they need to be the very best. The ISA Two dual-mono mic pre is the ideal solution: 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.

 

Superb sound spanning four different decades

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.

 

Lundahl Transformers

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.

 

Variable input impedance and up to 80 dB of gain

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 favourite 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.

 

Insert your choice of processors

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.

 

 

Specifications


Two channel classic Focusrite ISA transformer-based preamps

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


Measured Performance

 

Maximum Input and Output Levels

 

Maximum Output Level  +24 dBu with a THD+N < 0.01% at 1kHz measured with 150 Ω source impedance and 22Hz/22kHz band-pass filter
Maximum Microphone Transformer Input Level  +7 dBu with a THD+N < 0.7% at 1kHz measured at 0 dB of gain with 150 Ω source impedance and 22Hz/22kHz band-pass filter

 


Mic Input Response

 

Gain range  0 dB to +60 dB in 10 dB steps, plus 0 dB to +20 dB 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 at 60 dB of gain with 150 Ω 
source impedance and 22 Hz-22 kHz band pass filter
 -127 dB
Noise Noise at output with unity gain (0 dB) and 22 Hz-22 kHz band pass filter  -97 dBu
Signal-to-Noise Ratio Measured with 150 Ω source impedance and 22 Hz-22 kHz band pass filter  121 dB relative to max output +24 dBu
Total Harmonic Distortion + Noise Measured with a -20 dBu input signal at +30 dB of gain and with a 22 Hz-22 kHz band pass filter  < 0.0007% at 1 kHz
Frequency Response
At minimum gain (0 dB) 
At +60 dB gain

-0.5 dB at 10 Hz,

-1 dB at 135 kHz, relative to 1 kHz

-6 dB at 10 Hz,
-1 dB at 115 kHz, relative to 1 kHz


CMRR (Common Mode Rejection Ratio) -94 dB for mic input at 60 Hz for max. output = +24 dBu
-91 dB for mic input at 10 kHz for max. output = +24 dBu
 
Crosstalk Channel to Channel Mic input, with I/P = 0 dBu, gain = 0 dB @ 1 kHz input to channel A, channel B output = -85 dB

 



Line Input Response

 

Gain Range -20 dB to +10 dB in 10 dB steps, plus 0 dB to +20 dB continuously variable trim  
Input Impedance 10 kΩ from 10 Hz to 200 kHz  
Noise Noise at main output with gain at unity (0 dB) measured with 50 Ω source impedance and a 22Hz - 22 kHz band pass filter  -97 dBu
Signal-to-Noise Ratio Measured with 50 Ω source impedance and a 22 Hz-22 kHz band pass filter  121 dB relative to max output +24 dBu
Total Harmonic Distortion + Noise Measured with a 0 dBu input signal, +10 dB of gain and a 22 Hz-22 kHz band pass filter  < 0.002% at 1 kHz
Frequency Response At unity gain (0 dB)  -0.3 dB at 10 Hz,
-1 dB at 80 kHz, relative to 1 kHz
Crosstalk Channel to Channel Line input, with I/P = 0 dBu, gain = 0dB 
@ 1 kHz input to channel A 
Channel B output
= -91 dB

 

Instrument Input Response

 

 


Gain Range
+10 dB to +40 dB continuously variable trim  
Input Impedance > 2 MΩ  
Noise >Measured with 22 Hz-22 kHz band pass filter  Minimum gain (+10 dB) = -95 dBu
Frequency Response

At minimum gain (+10 dB) 

 

At maximum gain (+40 dB)

-0.1 dB at 10 Hz,
-1 dB at 115 kHz, relative to 1 kHz

 

-2.5 dB at 10 Hz, 
-1 dB at 110 kHz, relative to 1 kHz

 

 

High-Pass Filter

 

Roll-Off 18 dB per octave (3 pole filter)
Frequency Range Continuously variable from 16 Hz to 420 Hz (-3 dB)

 

 

Weight and Dimensions



W x D x H 480 mm x 280 mm x 44 mm

Weight
3.7 kg





 

 

 

 

 





 

 

 



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