Teenage Engineering EP-35 K.O. AMP Portable Instrument Amp

K.O.AMP from Teenage Engineering is a 35-watt, battery-powered portable instrument amplifier designed to be the centre of your jam sessions anywhere you go. With six simultaneous inputs, built-in Bluetooth audio, a USB audio interface and a splash-proof design, it is equally at home in the living room, rehearsal space or out in the garden. Plug in your guitar, microphone, synths and playback device at the same time, then just turn it up and play.

All connected inputs are mixed together automatically, so there is no need to select channels or dive into menus. Add in the integrated storage compartment with camp light, EP plug and EP grid compatibility, and a rugged carry handle, and you have a compact all-in-one sound system that is ready for impromptu jams, street sessions, camping trips and creative meet-ups.

Portable 35-watt Jam Station

K.O. AMP delivers up to 35 watts of portable power, with a dedicated woofer and tweeter for a full-range sound that covers everything from deep kicks to bright vocals. The built-in rechargeable lithium-ion battery means you can set up wherever inspiration strikes, without hunting for a mains socket. Whether you are rehearsing a set, busking or just jamming with friends, you get clear, loud sound in a compact footprint.

Six Inputs, All Playing at Once

With six inputs summed to a single mix, K.O. AMP lets you plug in guitar, microphone, stereo line sources and USB audio devices simultaneously. There is no active input to select, so everyone can join in at the same time. Dedicated gain controls for mic, guitar and line, plus a master tone control, make it easy to balance your sound quickly and keep the focus on playing rather than tweaking.

Built-in FX and USB Audio Interface

Eight built-in FX presets for guitar and microphone give you instant access to tones and vocal treatments without extra pedals or processors. Each FX section has its own amount control, so you can dial in anything from subtle ambience to more experimental textures. The USB 2.0 audio interface lets you connect to a computer or phone as a sound card, ideal for recording rehearsals, streaming or playing back tracks directly through the amp.

Bluetooth, Storage Compartment and Camp Light

Bluetooth with LE audio and broadcast mode allows you to stream backing tracks or share audio wirelessly, while the EP plug-compatible USB host port supports USB audio devices, thumb drives and Teenage Engineering accessories. The integrated storage compartment is perfect for small accessories, and the built-in camp light helps you find your gear in low light, with an additional disco mode for extra atmosphere when the sun goes down.

• Six Simultaneous Inputs - Guitar, microphone, stereo line and USB audio devices can all be connected and heard at once, with automatic summing to a single mix. This makes K.O. AMP ideal for quick group jams, collaborative writing sessions and portable setups where multiple players need to be heard without a mixer.
• Built-in Guitar and Mic FX - Eight FX presets for both guitar and microphone, each with its own amount control, give you instant access to usable tones without extra gear. From adding a touch of space to your vocals to shaping your guitar sound on the fly, you can keep your rig minimal and still sound polished.
• USB Audio Interface and EP Plug Compatibility - The USB-C device port functions as a high-speed audio interface for computers and phones, so you can record, stream or play back audio directly through the amp. The separate USB-C host port supports USB audio devices, thumb drives and EP plug accessories, expanding K.O. AMP into a flexible hub for modern portable setups.
• Portable, Splash-proof Design with Camp Light - A built-in rechargeable battery, integrated handle and splash-proof construction make K.O.-amp ready for outdoor use and travel. The storage compartment with camp light keeps essentials close to hand and visible in the dark, so you can keep the music going long after the sun has set.

General

• Product: Teenage Engineering K.O. AMP
• Type: Portable instrument amplifier
• Output Power: 30 W RMS woofer + 25 W RMS tweeter
• Total Power Rating: 35 W battery-powered operation
• Design: Splash-proof, integrated handle

Audio Inputs

• Inputs: 6 inputs with summing mix (all can play simultaneously)
• 3.5 mm Stereo Line Input:
  • SNR: 92 dBA
  • Analogue gain: 0 to 12 dB
  • Maximum input level: 8.2 dBU, 2.0 Vrms
• XLR Microphone Input:
  • SNR: 100 dBA
  • Analogue gain: -6 to 54 dB
  • Maximum level: -0.7 dBU, 0.7 Vrms
  • 48 V phantom power switchable
• 6.35 mm Mono Guitar Input:
  • SNR: 100 dBA
  • Analogue gain: 0 to 18 dB
  • Maximum level (default mode): -6.8 dBU, 0.35 Vrms
  • Maximum level (hi input mode): 8 dBU, 2.0 Vrms

Audio Outputs

• 3.5 mm Stereo Line Output:
  • SNR: 92 dBA
  • Maximum output level: 2.2 dBU, 1.0 Vrms

Effects and Controls

• FX: 8 built-in FX presets for guitar and microphone
• Guitar FX: Preset selector and FX amount dial
• Microphone FX: Preset selector and FX amount dial
• Microphone Gain: Dedicated gain knob
• Guitar Gain: Dedicated gain knob with hi input mode button and status LED
• Line In Gain: Dedicated gain knob
• Master Volume: Speaker volume dial (controls headphone volume when muted)
• Tone Control: Single EQ knob (centre flat, left for more bass and treble, right for more mids)
• Mute: Speaker mute button with status indication
• 48 V Phantom: On/off button with dedicated LED

Bluetooth and Wireless

• Bluetooth Version: 5.4
• Frequency Range: 2400 MHz to 2483.5 MHz
• Transmitter Power: < 10 dBm
• Features: LE audio and broadcast mode

USB Connectivity

• Computer/Phone Port:
  • Connector: USB-C high-speed device port
  • Function: Audio interface (sound card) and software updates
  • Power: Supports up to 45 W (15 V / 3 A) USB-C PD for charging
• EP Plug Port:
  • Connector: USB-C full-speed host port
  • Supported Devices: USB audio devices, USB thumb drives, EP plug accessories
  • Supported Formats: MP3, WAV, AIFF
  • Mode Button: Controls accessory functions when connected
• PD Charging Port:
  • Connector: USB-C PD charging input (no data)
  • Supported Chargers: Up to 45 W (15 V / 3 A) PD

Indicators and Status

• Power Button: On/off control
• Status LED (Power On):
  • Solid white: Unit on, battery full or not charging
  • Blinking white (1 Hz): Unit muted
  • Solid red and solid white: Unit on, battery charging
  • Blinking red (1 Hz fade to white): Low battery
  • Pulsing blue fading to white: Bluetooth advertising
  • Solid blue (for 3 seconds) fading to white: Bluetooth paired
  • 3 short solid red blinks after power on: Dead battery or battery fault
• Status LED (Power Off):
  • Off: Not charging or battery full
  • Solid red: Charging
  • 3 short solid red blinks after inserting USB supply: Dead battery or battery fault
• Charge Port LED:
  • Solid white: Charger rated between 27 W and 45 W
  • Solid amber: Charger rated between 15 W and 27 W (power may be limited)
  • Solid red: Weak or unsupported charger, charging limited or unavailable

Camp Light and Storage

• Storage Compartment: Integrated compartment for accessories
• Camp Light:
  • Modes: Off, on, auto (fades in when hatch opens, fades out when closed)
  • Control: Short press to cycle modes, long press for disco mode
  • Settings: Mode selection retained between power cycles

Power and Battery

• Power Input: 15 V / 3 A DC (charge and PC port)
• Battery Type: Lithium-ion 20.1 W (7.2 V / 2800 mAh)
• Charging: Via USB-C PD ports (up to 45 W supported)

Loudspeaker

• Output Power: 30 W RMS woofer + 25 W RMS tweeter
• Frequency Response: 50 Hz to 20 kHz ( -6 dB)
• Maximum SPL: 94 dB at 1 m

Environmental

• Operating Temperature: 10 °C to 40 °C (50 °F to 104 °F)
• Storage Temperature: -10 °C to 50 °C (14 °F to 122 °F)
• Relative Humidity: 20 percent to 90 percent non-condensing