CL-122 Four Band Parametric Equalizer

€ 2200

The CL-122 is an advanced 2-channel equalizer to meet the versatility demands of professional recording and mastering engineers. The CL-122 features 4 parametric bands. Special analog design techniques has been used to obtain a precise control of the sound structure down to the minimum details.

The CL-122 is based on Livio Agentini’ s patented single-stage parallel filters. This innovative phase coherent EQ design offers the lowest distortion/noise specifications, not available on similar units on the market.

The CL-122 input section provides a continuous input level control in the -10/+10 dB range. A peak level detector (LED) circuit indicates when the output level is -6 dB with respect to the saturation level. The equalizer can be excluded by a true-bypass button (LED indicator).

The filtering section is based on 4 bands, LO, MID1, MID2, HI. For each band three potentiometer controls are available. Frequency control, Emphasis/De-Emphasis control in the range -14/+14 dB (center detect) , Q control.

The CL-122 is an innovative and flexible equalizer, ready to take its place in any high profile recording, mastering broadcast and live activities

Power Supply Linear Regulator (Balanced C-Core Transformer)
Operating Voltage 220V 50 Hz/ 110 V 60 Hz switchable
Power Consumption 20 W
Input Electronically balanced, Impedance > 10 KΩ
Channel Gain Range:-10 to +10 dB.
Output Electronically balanced,
Output Impedance 50 Ω. (minimum external load 600Ω).
Output Level Level +4dBu, Max +28dBu.
Bandwidth 5 - 200.000 Hz -1dB, perfect square wave up to 20 KHz
Distortion + Noise <0.005% ( typical 0.001 %).
Filters LO Frequency Range 20-200 Hz,
MID1 Frequency Range: 100-1000 Hz,
MID2 Frequency Range: 500-5000 Hz,
HI Frequency Range: 2000-20000 Hz,
Front Panel Controls Left/Right level POTs +10/-10dBu,
Saturation Indicator (Red LED),
True-Bypass button with LED.
Power-On Switch.
Front Panel Equalizer Controls (for each channel) Central frequency control with centre detect:
LO 20-200 Hz,
MID 1 100-1000 Hz,
MID 2 500-5000 Hz,
HI 2000-20000 Hz ,
Emphasis/De-Emphasis control pot in the range -14/+14 dB for each band,
Q control pot.
Front Panel Indicators For each channel:
1 x red LED (By-Pass),
1 x red LED (Peak Meter).
Rear Panel Line In Connectors 2 x Balanced XLR female.
Rear Panel Line- Output Connectors 2 x Balanced XLR male.
Rear Panel 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 88.5 mm/3.5” (2 RU), D 225 mm / 8.86”.
Weight 2.8 kg.

    CL-122 Key-Technologies


    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.