CL-123 Channel Strip

€ 2,400

CL- 123 channel strip has been conceived to give to the professional user a unit that combines high reliability, rugged design, audio quality, versatility and ease of use. CL-123 is perfect for recording every kind of music from classic, pop/rock, electronic and in all the situations where maximum sound quality and special attention to dynamic range and signal to noise ratio is needed. The CL-123 technical specifications shows that it is the perfect audio system for actual digital recording 24bit/192kHz environments where superior performance is required.

CL-123 is based on the use of the latest circuit topologies, characterized by very low distortion, ultra-low noise and very wide frequency response. The amplifier architecture is based on two high dynamic range gain stages in order to avoid saturation. Even if the input stage of the CL-123 do not saturate up to +24 dBu, a special protection circuit limits the input level at +20 dBu in order to prevent any damage. The extended input dynamic range avoids the necessity of the input pad.

The channel strip contains a special circuit that allows the connection of microphones even if the unit is turned on with the Phantom Power activated. CL-123 also provides a four band fully parametric EQ with High-Cut/Low-Cut filters at fixed cut-off frequencies (80Hz/12kHz) which can be activated by a switch. Each filter stage is completely excluded from the main circuit if not in use. The emphasis/de-emphasis adjustment is based on a special circuit that controlling the input and output level of the filters guarantees a very linear and accurate control. Differently from other parametric EQs, the CL-123 is dedicated (due to his absolute sonic level quality) to high professional vocal recordings, classical instruments, high dynamic range instruments such as drums and percussions.

Number of Channels: 1
Power Supply Linear Regulator (Balanced C-Core Transformer)
Operating Voltage 220V 50 Hz, (110V 60 Hz version available)
Power Consumption 20 W
Microphone Input Electronically balanced
Microphone Gain 66 dB range with a continuous potentiometer control,
Max input level +20 dBu (internally limited to +12 dBu).
Line Input Unbalanced, Impedance 22 KΩ, (this input can be also used as EQ input).
Line Gain 30 dB range with a continuous potentiometer control,
Level 0/-30 dBu. Max +23 dBu.
Bandwidth 5 - 200.000 Hz -1dB, perfect square wave up to 20 KHz
Distortion + Noise <0.003% ( typical 0.001%).
Low Cut Filter 80 Hz, 12 dB / Oct.
High Cut Filter 8 KHz, 12 dB / Oct.
Parametric EQ 4 band with overlapping frequencies 20 - 200 Hz, 100 - 1.0 Hz, 500 - 5.0 Hz, 2.0 - 20.000 Hz,
3 Q settings – narrow, normal, wide,
+/- 14db gain range for emphasis/de-emphasis.
Output Electronically Balanced,
Level +4 dBu. Max +28 dBu.
Front Panel Controls Gain Potentiometers,
48V Phantom Power switch,
Lo-Cut and Hi-Cut switches,
Phase Reverse switch,
“3-way Q settings” toggle switch (each band),
14dB range of boost/cut,
Frequency setting pot,
4x push-button for EQ off,
Pre/Post EQ,
Display mode: Pre/Post Insert, Insert off,
Output level potentiometer.
Front Panel Connectors 1/4” TRS jack for kine input,
Balanced XLR female for microphone input,
2x 1/4” TRS jacks for insert connections (Send/Return),
Balanced XLR male output.
Front Panel Indicators Level Indicator 10-LED Bargraph (7x green, 3x red). 1.5 dB step,
4x red LEDs (48V Phantom Power, Hi-Cut, Lo-Cut, Phase).
Rear Panel Input Connectors Balanced XLR female input,
Balanced XLR male output,
Balanced XLR female/male for Insert (Send/Return).
AC mains IEC C13 16 A connector, AC mains cord with IEC Schuko 16A.
Construction 19" rack mount metal box
Dimensions W 483 mm / 19”, H 44.45 mm/1.75” (1 RU), D 225 mm / 8.86”.
Weight 2.5 kg.

    CL-123 Key-Technologies


    Modular means that the unit can be custom configured by choosing the right module from a set of standard modules or by choosing custom designed modules suitable for specific applications.

    The summing busses in the ARREL Audio units are implemented by using active fully balanced summing busses for maximum audio performances and noise rejection.

    Large Bandwidth (LB) means a very fast transient response able to represent the original sound with the maximum temporal resolution. LB is required to improve the perception of a “real sound” and to represent the details of the original sound.

    Large bandwidth plus very low total harmonic distortion means a perfect square wave reproduction.

    Ultra Low Noise (ULN) active and passive components and ULN design techniques. This requirement is especially important when the audio bandwidth is large as in the case of ARREL Audio products.

    High Dynamic Range (HDR) means that the saturation probability of the output stages is very low. This is obtained by using special rail to rail circuits and by increasing the power supply voltage of the analog circuits.

    Electromechanical tolerance means that electromechanical components are doubled in every situation in which maximum reliability it is important due to a frequent use (switches, push buttons, potentiometers).

    Through Hole technology means the maximum reliability in terms of thermal and mechanical stresses especially for connectors and electromechanical components.

    Special patented circuits guarantees very low phase distortion in ARREL equalizers and filters.

    In the ARREL preamplifiers, special input circuits and a high output dynamic range output stage guarantees no saturation, consequently the input pad is not required.