2-Way
- Active Crossover
ACN200
- Analog crossover network for 2-way and 3D configurations with “transfer function G=1” without phase rotation. ［Slope characteristic -12dB/Oct] Equipped with a low-frequency booster function that allows boosting in 5 steps from 0dB to 12dB (20Hz).
- Circuit without phase rotation
- Resistance switching attenuator
- Doubly regulated power supplies
Features
Booster
Low frequency booster function
In all speaker systems, frequencies below 200 Hz reduce speaker efficiency and sound pressure, and the ACN200 uses a CR filter to boost the low frequency range, enabling speedy, heavy bass reproduction. By powerfully driving the woofer to ultra-low frequencies, the center of gravity of the reproduced sound is lowered and the mid and high frequencies are enriched. The boost level can be selected from 0dB, 3dB, 6dB, 9dB, and 12dB at 20Hz using the push button.
* The phase of the booster section is rotated.
* Make sure that the power amplifier does not saturate when the boost level is increased. Example; 12dB is multiplied by 4.
Crossover
Optimal solution for bi-amplified systems
Separate signals for low and high frequencies are used to drive the speaker, resulting in distortion-free reproduction sound.
- 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.
2Way-5Way Connection diagram for use
Multiple ACN200 units can be used to expand to 3-way and 4-way crossovers. In addition, the 2-way crossover ACN200 and 4-way crossover ACN400 can be combined to construct a 5-way system.
Configurable crossover frequency
Select from 3 types A-C
ACN200-A 40, 63, 100, 160, 250Hz
ACN200-B 400, 630, 800, 1000, 1400 Hz
ACN200-C 2000, 3300, 5000, 8000, 12000 Hz
○ 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
3D System: Lch+Rch 3D output is available for Lch low frequency. The level is -4.5dB.
Attenuator: Resistor-switchable, adjustable from +0 to -30dB
Memory of settings: Up to 2 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 ACN200 switches the resistor ladder and attenuates 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.
Specification
Model ACN200
Type CR type (MK filter) crossover network
Input/Output Terminal Balanced (No.2 HOT)
Max. Input Voltage 3.0V
Max. Output Voltage 3.0V
■ Booster part
Input Impedance (100 Hz-10k Hz) 5k Ω or more
Output Impedance (100 Hz-10k Hz) 250 Ω or less
THD 0.1 %/1k Hz or less (At 1V 1kHz output)
Frequency Response 20 Hz-20k Hz +0 -2 dB
Gain 0dB
Boost Levels 0 dB, 3 dB, 6 dB, 9 dB, 12 dB /20 Hz (Connected to crossover)
Signal to Noise Ratio 85 dB (Output 1.0 V, IHF-A corrected)
Crosstalk 60 dB (Output 1.0 V, 1kHz, IHF-A corrected)
Mute Function Possible
Gain adjustment None
■ Crossover part
Input Impedance (100 Hz-10k Hz) 5k Ω or more
Output Impedance (100 Hz-10k Hz) 150 Ω or less
THD 0.1 %/1k Hz or less (At 1V 1kHz output)
Frequency Response (2ch composite) 20 Hz-20k Hz +0 -2 dB
Gain 0 dB
Crossover Frequencies Setting by pushbutton
○ Type-A 40, 63, 100, 160, 250 Hz
○ Type-B 400, 630, 800, 1000, 1400 Hz
○ Type-C 2000, 3300, 5000, 8000, 12000 Hz
Slope Characteristics -12 dB/Oct fixed
Signal to Noise Ratio 90 dB (Output 1.0 V, IHF-A corrected)
Crosstalk 80 dB (Output 1.0 V, 1k Hz, IHF-A corrected)
Level Adjustment
○ +0dB～ -8dB 0.5dB step
○ -8dB～-13dB 1.0dB step
○ -13dB～-16dB 1.5dB step
○ -16dB～-30dB 2.0-6.0dB step
3D Output Possible (Lch-Low, Level is -4.5dB)
Phase Setting Not possible
Memory Write/Recall 2 memories
Mute Function Possible (Per channel)
Display Adjustment 5 levels including lights out
Power Supply AC100/117/220/240 V, 50/60 Hz
Power Consumption 50 W
Dimensions 470W×51H×350D mm
Weight 7 kg
Finishing Anodised aluminium
Accessories AC cords
Warranty Period 5 years
○ The input impedance of this unit is 5k Ω. Please use a equipment with an output impedance of 1.5k 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 March 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.
