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Key Features
- Delivers 400 watts of powerful, reliable stereo amplification
- Offers ATR technology for clear, dynamic sound performance
- Provides zero-attack limiters for dependable overload protection
- Includes balanced XLR inputs for clean, noise-free connections
- Features tough steel rackmount design built for long-term use
Behringer KM400 Power Amp with ATR Overview
The Behringer KM400 Power Amp with ATR is ideal for bands, venues, and performers who need consistent, high-powered amplification that?s easy to set up and manage. With 400 watts of output, it provides strong, reliable sound whether you?re running a stereo setup or bridging for extra punch. ATR (Accelerated Transient Response) technology ensures quick, accurate signal handling, delivering clarity and definition across all frequencies.
Zero-attack limiters protect against sudden overloads, so you can push your sound confidently without worrying about damage. Balanced XLR inputs and twist-lock speaker outputs keep your signal clear and secure, while independent DC and short circuit protection safeguards your gear. Finished with a durable steel chassis and front-to-back ventilation, it's built to last gig after gig.
Product Ref: 357297
Full Description
View Full DescriptionPower that performs
With up to 400 watts of power in bridge mode, the KM400 ensures your sound cuts through clearly, even in demanding live settings. It handles 2 x 190 watts at 4 ohms or 2 x 120 watts at 8 ohms, giving you flexibility for different speaker configurations. Whether you’re amplifying vocals, instruments, or playback, the power output remains stable and consistent. Its switch-mode power supply keeps things efficient and quiet, providing clean energy delivery without excess noise or weight.
Clarity through ATR technology
ATR (Accelerated Transient Response) technology means your sound reacts fast and naturally to every musical detail. It captures dynamics with precision, producing tight, defined low end and sparkling highs. You’ll hear every nuance, making it especially useful for mixing live or in rehearsal spaces. This responsiveness helps your speakers perform at their best, maintaining clarity and balance even when the levels rise, perfect for musicians who want accuracy and power in one amp.
Reliable protection and control
Each channel on the KM400 features independent DC and short circuit protection, automatically keeping both the amplifier and connected speakers safe. Built-in zero-attack limiters prevent distortion and clipping, ensuring smooth output even under pressure. You also get signal and clip LEDs that make it easy to monitor performance at a glance. These small but essential features make managing your live sound setup simpler and more secure, so you can focus on your performance instead of your equipment.
Built for real-world use
The KM400’s all-steel rackmount chassis is designed to handle the knocks and bumps of life on the road. Front-to-back ventilation keeps airflow consistent, maintaining performance during long sets. Its professional connectors, including balanced XLR inputs and twist-lock speaker outputs, guarantee reliable signal transfer even in busy live environments. Compact and robust, it fits easily into standard racks, giving you a dependable power source that’s ready whenever you are.
Features
- Delivers 400 watts of clean, reliable power
- ATR technology ensures quick, precise sound response
- Zero-attack limiters protect against sudden overloads
- Balanced XLR inputs provide noise-free operation
- Twist-lock outputs offer secure speaker connections
- Independent protection on each channel for safety
- Front-to-back cooling keeps temperatures stable
- Durable 2U steel rackmount chassis built for transport
Specifications
- Continuous RMS Output Power (8 ohm per Channel): 120 W RMS
- Continuous RMS Output Power (4 ohm per Channel): 190 W RMS
- Continuous RMS Output Power (8 ohm, Bridge Mode): 400 W RMS
- Connectors - Inputs: 2 x XLR, 2 x 1/4'' TRS, 2 x RCA
- Connectors - Outputs: 2 x Locking-Style Professional Speaker Connector, Binding Post
- Input Impedance (XLR / 1/4'' TRS): 30 k ohm Balanced / 15 k ohm Unbalanced
- Input Impedance (RCA): 14 k ohm Unbalanced
- Output Circuit Type: Class-AB, Complementary Linear Output
- Circuit Protection: Short Circuit Current, DC Fault, AC Fuse, Limiter, Thermal Cut
- Damping Factor: >245 @ 8 ohm
- Frequency Response (@ -10 dB Below Rated Output Power): 20 Hz – 20 kHz, +0/-0.5 dB
- Frequency Response (@ -3 dB): 10 Hz – 80 kHz
- Signal-To-Noise Ratio: >100 dB (Unweighted, 20 Hz – 20 kHz)
- Voltage Gain @ Level Control Max: 32 dB
- Input Sensitivity @ Level Control Max: 0.77 V / 26 dB / 1.4 V (Switchable)
- Front Controls: Power Switch, Level Control (Channel A/B)
- Rear Controls: Sensitivity, Limiter, Ground/Lift, Mode Switch
- Indicators: Power (White LED), Signal (Green LED), Clip (Red LED), Protection (Yellow LED), Bridge Mode (Yellow LED)
- Power Supply (USA/Canada): 120 V, 60 Hz
- Power Supply (UK/Australia/Europe): 220–240 V, 50/60 Hz
- Power Supply (Korea/China): 220–240 V, 50/60 Hz
- Power Supply (Japan): 100 V, 50/60 Hz
- Power Consumption @ 1/8 Rated Power: 400 W
- Mains Connection: Standard IEC Receptacle
- Weight: 8.5 kg
- Dimensions (H x W x D): 88 mm x 482 mm x 317 mm
- Rack Size: 2U Standard Rackmount
- Product Code: KM400
Your order may contain items that use a 240V UK plug or a 220V EU plug
Any electrical items in your order may have been designed to work with a 240V circuit, using a United Kingdom G type plug connection or a 220V circuit, using an EU plug connection. An adapter or transformer may be required for these items to work properly and safely in your country. Some items work with a range of voltages, or have a switchable voltage control built in. Please refer to the specific product details for further information.
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