JB-Systems KM 4.1

The compact echo effects unit with integrated audio mixer offers you a well-thought-out combination of functionality and easy operation – ideal for karaoke nights, small live setups, or use in event spaces. Two separate microphone inputs with individual volume and equalizer controls allow you a clear and voice reproduction tailored to your preferences. The automatic talkover function ensures that the music automatically lowers as soon as someone speaks – perfect for announcements or singing performances.

Additional audio sources like CD players, computers, or mobile devices can be connected via the two line inputs. Each input can be controlled separately, giving you maximum control over the mix. The switchable echo effect can be applied either to both microphones or the external mixing console. With a switchable delay range between 0–400 ms and 400–800 ms, you can precisely control the room effect – without complicated programming.

A master volume control on the output manages the overall volume, while a mono/stereo switch allows you to output the signals optimally depending on the situation. The device is fully rack-mountable (19", 2 RU) and can thus be easily integrated into existing setups. Whether stationary or mobile – its robust construction and low weight keep it flexible for many uses.

The clear arrangement of controls, sensible channel separation, and the reduced but well-thought-out features make this model a reliable solution for many application scenarios. The high signal-to-noise ratio of 60 dB contributes to clean signal processing, while the wide frequency response from 20 Hz to 20 kHz enables natural and balanced sound reproduction.

Features JB-Systems KM 4.1

• Compact echo effects unit with integrated mixer for karaoke and voice amplification
• Two microphone inputs with volume control, 3-band equalizer, and automatic talkover function
• Echo effect optionally applicable to microphone inputs or external mixing console
• Switchable delay time between 0–400 ms and 400–800 ms
• Two controllable line inputs for additional audio sources
• Master output with overall volume control and mono/stereo switch
• Suitable for rack mounting (19 inch, 2 RU)
• Easy operation and robust design for daily use

Technical Data

• Power supply: AC 240V, 50Hz
• Color: black
• Frequency range: 20 Hz – 20000 Hz
• Signal-to-noise ratio: 60 dB
• Functions: integrated sound effects (delay)
• Inputs: RCA | jack | IEC
• Outputs: RCA
• Mounting: 19" rack mount
• Height units: 2 U
• Weight: 3.5 kg
• Dimensions (W x D x H): 483 x 180 x 44 mm

Scope of Delivery

• JB-Systems KM 4.1 echo/mixer unit
• Power cable
• User manual