Analog crossover network with "transfer function G=1" without phase rotation. [slope characteristic -12dB/Oct]. 2-way, 3-way, 4-way, and 3D configurations are available.

Active Crossover ACN400


"Transfer function G=1" MK filter

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 range・・・・・・63, 100, 200, 400, FLAT

  • Mid-low/Mid-high range・・・・・400, 630, 1000, 2000

  • Mid-high/High range・・・・・・2000, 4000, 8000, FLAT

* It can also be used as a 2-way or 3-way by specifying 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.

<3D System> 3D output + 3-way setting with 3D selection button

<Attenuator> Resistor-switchable attenuator, adjustable from +0 to -30dB

<Memory of settings> Up to 3 memory writes and recalls are possible.


Independent left and right dual 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.


Uniquely designed input/output transformers

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.


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(1k Hz)

Drive with a device with an output impedance of 1k Ω or less.

Output Impedance

(100 Hz ~ 10k Hz)

300 Ω(1k Hz)

0.1 %/1k Hz or less (at 0.3 V output)

Frequency Response 20 Hz to 20 kHz +0 -2 dB (4ch composite bandwidth)
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 1.0V, IHF-A corrected)


70 dB (Output 1.0V, 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/call 3 memories
Volume Control Mute function (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 16.0 kg

Anodic oxide coating

Accessories AC cords
Warranty Period 5 years(Excluding consumables)

* Dimensions do not include legs, knobs, and terminals.

  • The slope of each filter is fixed at -12dB. It cannot be changed to other slopes.
  • Product appearance and specifications are subject to change without notice.
  • Actual colors may differ from those in the photographs due to shooting, lighting, etc.
  • ■Dimensions