The Ecler NUO2 is a professional audio controller designed for mixing and manipulating audio signals. It features a compact design with a focus on intuitive control and robust performance, making it suitable for DJs and audio professionals.

Function Description:

The NUO2 operates as a 2-channel DJ mixer, offering comprehensive control over two stereo input channels, a microphone input, and a dedicated effects loop. Each channel includes a 3-band EQ with kill functionality, allowing for precise frequency manipulation. The mixer also features a monitor section with PFL (Pre-Fader Listen) capability, a master output, and a record output. A key feature is its VCA (Voltage Controlled Amplifier) control circuit for both channel faders and the crossfader, which allows for smooth and precise level adjustments and offers fader shape control for customizable mixing styles. The integrated isolator on each channel provides extreme frequency cut/boost capabilities.

Important Technical Specifications:

Inputs:
- H-LINE: 0dBV / 50kΩ
- L-LINE: -10dBV / 50kΩ
- PHONO: -40dBV / 50kΩ
- MICRO: -50dBV / >1kΩ
- FX RETURN: 0dBV / >15kΩ
Outputs:
- OUT 1 (BAL): 0dBV / 600Ω (1V, +6dB 2V internally selectable)
- OUT 2: 0dBV / 2.2kΩ (1V, +6dB 2V internally selectable)
- REC: 0dBV / 10kΩ
- HEADPHONES: 200mW / 200Ω (THD 1%)
- FX SEND: 0dBV / 10kΩ
Frequency Response:
- H-LINE & L-LINE: 10Hz - 30kHz (-1dB)
- MICRO: 10Hz + 35kHz (-1dB)
- PHONO: RIAA ±0.5dB
THD + N (Total Harmonic Distortion + Noise):
- H-LINE & L-LINE: <0.07%
- MICRO: <0.1%
- PHONO: <0.15%
CMRR (Common-Mode Rejection Ratio):
- MICRO: >70dB @ 1kHz
Signal Noise Ratio:
- H-LINE & L-LINE: >95dB
- MICRO: >85dB
- PHONO: >90dB
Gain Control:
- INPUT 1 & 2: ±15dB
- INPUT 3: ±20dB
Tone Control (Input 1 & 2):
- BASS: +10 / -30dB
- MID: +10 / -25dB
- TREBLE: +10 / -30dB
Tone Control (Input 3):
- BASS: ±15dB
- TREBLE: ±15dB
Kill Filter (Slope 12dB/oct.):
- LOW: 200Hz
- MID: 200Hz - 5.5kHz
- HIGH: 5.5kHz
Mains: 90-264VAC, 47-63Hz
Power Consumption: 30VA
Dimensions:
- Panel: 370x160mm
- Depth: 80mm
Weight: 3.3 kg

Usage Features:

The NUO2 is designed for dynamic live performance and studio applications.

Input Flexibility: It offers a variety of input options per channel, including switchable H-LINE, L-LINE, and PHONO inputs, catering to different audio sources like turntables, CD players, and other line-level devices. A dedicated microphone input with its own gain, treble, and bass controls allows for vocal integration.
3-Band EQ with Kill: Each main channel features a powerful 3-band equalizer (Treble, Mid, Bass) with an "OFF" position that acts as a kill switch, allowing for complete removal of specific frequency bands for creative mixing effects. The isolator provides even more extreme frequency manipulation.
FX Send/Return Loop: A dedicated FX send/return loop allows for the integration of external effects processors, enhancing creative possibilities. The FX send can be switched between pre-fader and post-fader operation, offering flexibility in how effects are applied.
PFL Monitoring: The PFL (Pre-Fader Listen) function enables users to monitor individual channels through headphones before bringing them into the main mix, crucial for beatmatching and cueing. The monitor section includes PFL/MIX control and a headphone volume knob.
VCA Faders and Crossfader: The use of VCA technology for both channel faders and the crossfader ensures smooth, consistent, and long-lasting performance. The crossfader features a "shape" control, allowing DJs to adjust the curve from a smooth blend to a sharp cut, suitable for scratching and quick transitions.
Output Configuration: The main outputs (OUT 1 and OUT 2) offer internal selectable gain settings (0dB or +6dB), providing flexibility for connecting to various sound systems and amplifiers.
Robust Construction: The mixer is built with durable components, including high-quality potentiometers and faders, designed to withstand the rigors of professional use.

Maintenance Features:

The service manual provides detailed information for maintenance and repair, indicating a design that supports serviceability.

Modular Design: The internal layout, as shown in the schematics and block diagrams, suggests a modular construction, which can simplify troubleshooting and component replacement.
Detailed Parts List: A comprehensive parts list with codes, descriptions, and references for printed circuit components (capacitors, diodes, ICs, resistors, etc.) is provided, facilitating the ordering of replacement parts.
Wiring Diagram: The wiring diagram illustrates the internal connections, aiding in identifying and repairing wiring issues.
Component Location Schemas: Detailed component location schemas for the main circuit board and front control board help technicians pinpoint specific components for inspection or replacement.
Mechanical Diagram: The mechanical diagram provides an exploded view of the mixer, detailing the assembly of various parts, including knobs, buttons, chassis components, and screws, which is useful for disassembly and reassembly during repairs.
Fader and Crossfader Replacement: Given the heavy use of faders in DJ mixers, the design likely allows for relatively straightforward replacement of these components, supported by the mechanical diagrams. The VCA technology also contributes to their longevity and consistent performance, reducing the frequency of maintenance.
Power Supply Accessibility: The power supply unit is shown as a distinct module, suggesting it can be serviced or replaced independently if issues arise.
Internal Output Gain Selection: The ability to internally select output gain settings (0dB or +6dB) on OUT 1 and OUT 2 indicates a design that allows for adaptation to different system requirements, potentially reducing the need for external signal conditioning.

Ecler NUO2 - INDEX

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