- Active Crossover
ACN400
- Analog crossover network with "transfer function G=1" without phase rotation. [Slope characteristic -12 dB/Oct]. 2-way, 3-way, 4-way, and 3D configurations are available.
- Circuit without phase rotation
- Resistance switching attenuator
- Doubly regulated power supplies
Features
- Circuit without phase rotation
- The -6dB/Oct is in phase, but you want to split with a steeper filter. However, if you increase the value to -12dB/Oct or higher, the phase does not match. Even if you reverse the polarity of the speakers or take time alignment, the phase does not match. The newly developed "MK Filter" eliminates phase rotation even at -12dB/Oct, freeing you from the difficulty of adjusting a multi-amp system.
Crossover frequencies that can be set
Low/Mid-low 63, 100, 200, 400, FLAT
Mid-low/Mid-high 400, 630, 1000, 2000
Mid-high/High 2000, 4000, 8000, FLAT
○ The slope of each filter is fixed at -12dB. It cannot be changed to other slopes.
○ Analog type, no time alignment function is provided.
Other Functions
2-way or 3-way: It can also be used by specifying FLAT.
3D System: 3D output + 3-way setting with 3D selection button
Attenuator: Resistor-switchable, adjustable from +0 to -30dB
Memory of settings: Up to 3 memory writes and recalls are possible.
- Resistance switching attenuator
- In a variable resistor with a structure in which the contacts slide over a resistive element, a point-contact diode is formed at the contact point. When an audio signal passes through this point, noise is generated and becomes the basis of distortion. The C3PR switches the resistor ladder and attenuates from 0 dB to -60 dB by a highly reliable relay with gold and platinum contacts in a crossbar-twin-construction.
- Doubly regulated power supplies
- A switching power supply that does not generate flux leakage and a fast-response dropper power supply are used to construct a highly stable power supply. A unique transformer placed in the signal path cuts noise and allows only the audio signal to pass through without adding anything extra. Both inputs and outputs are equipped with one XLR and one RCA each, and the use of transformers ensures perfectly balanced inputs and outputs.
Specification
Model ACN400
Type CR type (MK filter) crossover network
Input/Output Terminal Balanced Unbalanced
Max. Input Voltage
3.0 V (Balanced, Unbalanced)
Max. Output Voltage
3.0 V (Balanced, Unbalanced)
Input Impedance (100 Hz-10k Hz) 3k Ω
Output Impedance (100 Hz-10k Hz) 300 Ω
THD (At 0.3 V output) 0.1 %/1k Hz or less
Frequency Response (4ch composite)
20 Hz-20 kHz +0 -2 dB
Gain 0 dB
Crossover Frequencies Setting by pushbutton
○ Low/Mid-low range 63, 100, 200, 400, FLAT
○ Mid-low/Mid-high range 400, 630, 1000, 2000
○ Mid-high/High range 2000, 4000, 8000, FLAT
Slope Characteristics -12 dB/Oct fixed
Signal to Noise Ratio
80 dB (Output 1.0 V, IHF-A corrected)
Crosstalk
70 dB (Output 1.0 V, IHF-A corrected)
Level Adjustment
○ +0 dB～-8 dB 0.5 dB step
○ -8 dB～-13 dB 1 dB step
○ -13 dB～-16 dB 1.5 dB step
○ -16 dB～-30 dB 2-6 dB step
3D Output
Possible (Lch-Low, Subwoofer + 3Way)
Phase Setting Not possible
Memory Write/Recall 3 memories
Mute Function
Possible (Per channel and all channels)
Display Adjustment 5 levels including lights out
Power Supply AC100/117/220/240 V, 50/60 Hz
Power Consumption 60 W
Dimensions 470W×90H×350D mm
Weight 16 kg
Finishing Anodised aluminium
Accessories AC cords
Warranty Period 5 years
○ The input impedance of this unit is 3k Ω. Please use a equipment with an output impedance of 1k Ω or less.
○ The slope of each filter is fixed at -12dB. It cannot be changed to other slopes.
○ Dimensions do not include legs, knobs, or terminals.
○ The descriptions are current as of January 2025.
○ The appearance and specifications are subject to change without notice.
○ Actual colors may differ from those in the photographs due to photography, lighting, etc.
