ARREL Audio Eurorack Stereo Summing Mixer is the answer to all stream mixing needs for EURORACK synthesizers. Its features set it apart from other similar products on the market due to a very high fidelity approach used for the design of the electronics together with the use of line transformers to drive the L and R outputs. The circuit used in the ER-100 are directly derived from our line of professional audio units in order to obtain the best sonic performances.
The use of line transformers means a higher voltage output level (about 10 dB over the competitors), suitable to drive all modern audio converters. Output transformers mean also a very reliable connection in terms of unbalancing and ground loops problems. The ER-100 is characterized by 8 input channels and a stereo output.
Each channel is characterized by a pan pot control, a volume control and a solo button. A stereo insert controllable by a switch is available on the output bus. The monitor section is characterized by a volume control and a monitor out. An auxiliary input is available (push button selection), suitable for monitoring DAC or general external inputs such us a CD. Two LED VU meters are available on the output bus.
Number of Channels: | 8 Inputs, L/R Outputs |
Power Supply | Eurorack Standard |
Power Consumption | 160 mA (+12 VDC, with the maximum level on the headphone), 100 mA (no headphone), 60 mA (-12 VDC) |
Input | Unbalanced, Level 0 dBu max +20 dBu Impedance > 5 KΩ |
Master Output | Transformer balanced and floating, Output Impedance optimum load impedance > 5KΩ |
Master Level | Level +4dBu, Max +28 dBu |
AUX Input (DAC) | Stereo. Level -6dBu, Imp. 10kΩ, unbalanced |
Bandwidth | 5 - 60.000 Hz -1dB, perfect square wave up to 20 KHz |
Distortion + Noise | <0.005% ( typical 0.001%). |
Front Panel Controls | Master Section, Monitor Section: Rotary volume control, Input Section:level and pan control, Solo button,Insert Section: Stereo insert on Left and Right Selected by a button |
Front Panel Input Connectors | 8 x 3.5 mm jack for the input , 4 x 3.5 mm jack for the stereo insert 1 x 1/4” stereo jack for headphones Imp. >50Ω 2 x 3.5 mm jack for the output 2 x 3.5 mm jack for the AUX input 2 x 3.5 mm jack for the monitor out |
Front Panel Indicators | L/R 10-LED Bargraph Level Indicator (7 x green, 3 x red), 1.5dB step, Solo LED, AUX in LED, |
Rear Panel Connectors | Eurorack power supply connector |
Construction | 28U TE Units (142mm) |
Dimensions | W 142 mm, H 128 mm |
Weight | 500 g |
EURORACK OUTPUT LINE TRANSFORMER (ER-OLT) High quality output line transformers means a lot of advantages especially when used in the Eurorack environment such as: increase in the signal output level over the Eurorack standard level that is limited by the low supply voltages (+12V/-12V), no problems with ground loops (transformer galvanic isolation), no problems when the output will be unbalanced. Transformer galvanic isolation assure that the output signals are floating with respect to the ground so you can unbalance without problems. The possibility to unbalance the L and R output signals can be very useful in a lot of live situations. |
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LARGE BANDWIDTH (LBW) 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. |
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PERFECT SQUARE WAVE (PSW) Large bandwidth plus very low total harmonic distortion means a perfect square wave reproduction. |
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ULTRA LOW NOISE (ULN) 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. |
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HIGH DYNAMIC RANGE (HDR) High Dynamic Range (HDR) means that the saturation probability of the output stages is very low. This is obtained by using a step up transformer in the output stage. |
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ELECTROMECHANICAL FAULT TOLERANCE (EFT) Electro-mechanical 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). |
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THROUGH-HOLE TECHNOLOGY (THT) Through Hole technology means the maximum reliability in terms of thermal and mechanical stresses especially for connectors and electromechanical components. |