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Yamaha STAGEPAS 400i Portable 8-channel PA system

Item # 845STGP400

If you're looking for a portable, powerful PA system that's easy to use and easy to transport, take a look at the...

If you're looking for a portable, powerful PA system that's easy to use and easy to transport, take a look at the...

Item # 845STGP400

Shop all Yamaha Pro Portable PA Systems

About the Yamaha STAGEPAS 400i

Jon Paul

A versatile, portable PA

If you're looking for a portable, powerful PA system that's easy to use and easy to transport, take a look at the Yamaha STAGEPAS 400i. Ideal for anything from acoustic combos to dancehall DJ's to spoken word performers, this compact PA delivers outstanding sound in any environment.

A versatile, portable PA

If you're looking for a portable, powerful PA system that's easy to use and easy to transport, take a look at the Yamaha STAGEPAS 400i. Ideal for anything from acoustic combos to dancehall DJ's to spoken word performers, this compact PA delivers outstanding sound in any environment.

Yamaha STAGEPAS 400l

The 400i has everything you need in a portable PA.

Smart design makes it easy to use

This all-in-one PA system consists of two lightweight speakers and a detachable mixer, along with one pair of speaker cables and a power cord. Setup is quick, easy, and intuitive – even for inexperienced users – so the STAGEPAS 400i is ideal for church or school functions where a variety of people might be setting up the system.

Take the stress out of setup

Fiddling with the mix isn't the fun part of performing, so the 8-channel STAGEPAS 400i mixer is designed to help you get the sound you want with minimal stress. One knob controls the SPX digital reverb, which lets you choose between four settings. You also get one-knob control over the 2-band EQ, so whether you're giving a speech, playing a show, or DJ-ing a wedding reception, it's easy to get just the right sound for the gig.

The onboard feedback suppressor – a feature usually found on high-end equipment – lets you get rid of annoying feedback with the touch of a button. And the handy iPod/iPhone connection gives you quality playback, while charging the device. Extra outputs mean you can expand your system (or add a monitor system) with additional powered speakers or a subwoofer, so the STAGEPAS 400i gives you plenty of room to grow.

Big sound from compact speakers

With the mixer supplying 400 watts of power, the speakers have all the juice they need to fill a reasonably-sized room with sound. Thanks to Yamaha's digital signal processing (DSP), the sound will be distortion-free, even when you really crank it up. The DSP has built-in limiter circuits, so you'll get years of use out of your STAGEPAS 400i without worrying about accidentally blowing the speakers.


Product highlights:

    General Features:
    • 8-channel portable PA system
    • detachable 8-channel mixer
    • built-in amps (200W x 200W dynamic rating; 180W X 180W continuous)
    • 2-way bass reflex speakers (8" woofer and 1" compression driver)
    • iPod/iPhone USB connection
    • SPX digital reverbs (4 types, parameter control)
    • 2-channel EQ
    • onboard feedback suppressor
    • inputs: four mic inputs, four 1/4" inputs (switchable stereo/mono), stereo RCA inputs, USB port
    • phantom power
    • outputs: left/monitor and right line out, subwoofer line out, two speaker outputs
    • 34.8-35.2mm pole socket with StageLok™
    • frequency range: 55Hz - 20,000Hz
    • speaker dimensions: 11-3/8" W 18-9/16" H x 11" D
    • mixer dimensions: 12-1/8" W x 7-1/8" H x 4-9/16" D
    • weight: 16.5 lbs. (speaker); 6.18 lbs. (mixer)
    • warranty: 1 year
    • MFR # STAGEPAS 400I

    What's in the box:

    • Powered mixer
    • 2 PA speakers
    • Two 19.5' speaker cables
    • 6' AC Power cable
    • Owner's Manual

    Customer reviews for Yamaha STAGEPAS 400i

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    More details on the Yamaha STAGEPAS 400i

    Russ B.

    Features & specs

    Mic inputs XLR/PH (4)
    Line inputs 4 (PH/RCA)
    Phantom power Yes
    Channel EQ Y
    Master EQ Y
    Monitor outputs Phone (st)
    Built-in effects Y
    Number of speakers 2
    Drivers per speaker 2
    Woofer Size (inches) 8
    Tweeter Size (inches) 1
    System Frequency response 55-20k

    Product Research


    Portable PA System: The Yamaha STAGEPAS 400i is a 400-watt, portable PA system which consists of a 8-channel powered mixer, two 8" passive speakers, a pair of speaker cables, and a power cord. In addition, the STAGEPAS 400i offers iPod/iPhone USB connection, SPX digital reverbs, an onboard feedback suppressor, and versatile EQ. Compact and light enough to carry by hand, the STAGEPAS 400i all-in-one PA system can go almost anywhere. The two lightweight speakers and external power mixer combine into an simple, compact package that provides portability and great sound. With its intuitive, simple design, STAGEPAS 400i can be set up and ready to go in a matter of minutes. Even users with no PA operation experience will be able to produce high-quality sound in no time. Flexible enough to be used in a truly impressive range of environments and applications, the STAGEPAS 400i system can be set up in a variety of PA and monitoring configurations; great for acoustic guitar and vocal, band performance, public speaking, or mobile DJ-ing.

    Pair of Passive Speakers: The Yamaha STAGEPAS 400i includes a pair of two-way passive speakers that are capable of producing a wide soundstage.

    • Two-Way Speaker Design: Each passive speaker employs a two-way design with a horn-loaded 1" tweeter and 8" woofer. The pure titanium 1" compression driver is mounted to a 90°x 60° non-resonant, constant directivity horn with the goal of minimizing radiation pattern deterioration in oblique directions as more conventional horns are prone to doing. This can help to achieve a more ideal coverage area without irregularities. With the new wide dispersion constant directivity horn, sound expands in a more rectangular pattern providing 90° horizontal x 60° vertical coverage, with wide-frequency sound projected to the edges of the coverage area. The high power 8" woofer provides deep bass response with low distortion for great sound.
    • ABS Bass Reflex Enclosure: The speakers feature a rugged, non-resonant ABS enclosure that is designed to dampen down vibrations caused by high output levels, producing less distortion, and superior sonic quality. The road-tested enclosure is equipped with heavy-duty grilles and ergonomic, gripped handles that greatly improve durability and portability. The speaker uses a Bass Reflex enclosure for greater efficiency and bigger bass.
    • 1/4" Phone Jacks: Each speaker features a 1/4" phone jack. Use the included speaker cables to connect the speakers to the corresponding 1/4" phone jacks on the power mixer.
    • Mounting Options: The speakers feature a 1.375" (35mm) pole socket for use with Yamaha's speaker stand (SS238C, sold separately) for easy positioning in a wide range of applications.

    Built-in Amp w/ Intelligent DSP: The Yamaha STAGEPAS 400i's external power mixer is equipped with a 360W RMS/400W Peak amplifier that is optimally designed to match the system's passive two-way speakers. The STAGEPAS 400i also utilizes digital signal processing (DSP) to offer the consistently high-quality, distortion-free sound at any volume level, whether you're giving a business presentation or cutting loose in a club. What's more, Yamaha's intelligent DSP incorporates the use of advanced limiter circuits to protect vital STAGEPAS 400i components, ensuring that you get the most out of your gear for years to come.

    Versatile Mixer Inputs: The Yamaha STAGEPAS 400i is equipped with four Mic/Line input jacks (1-4) and four Line input jacks (5/6-7/8) which can be configured to fit a variety applications. The Line input jacks (5/6-7/8) can be set to stereo or mono.

    • Input Channels 1-2: selectable Mic/Line XLR-3-31 inputs
    • Input Channels 3-4: selectable Mic/Line XLR/Phone-combo inputs
    • Input Channels 5/6: selectable mono/stereo 1/4" phone or RCA Line inputs
    • Input Channels 7/8: selectable mono/stereo 1/4" phone or minijack Line inputs (or USB input for iPod/iPhone).

    Hi-Z Switch & Phantom Power: The Hi-Z switch allows a passive pickup instrument to be connected hassle-free, without a direct box to input channel 4. You'll be able to connect and acoustic-electric guitar to enjoy high-quality performance with low distortion. Phantom power for input channels 1-2 (+30V) allows you to connect condenser microphones directly to STAGEPAS 400i to get the best sound quality possible. It also means you won't have to worry about DI boxes losing their charge during a performance.

    Monitor & Subwoofer Out: Expand your front-of-house system or set up a monitoring system by using the STAGEPAS 400i together with other powered speakers such as Yamaha's DXR lineup (sold separately). Add more bottom end to your system by connecting a powered subwoofer such as the Yamaha DXS Series (sold separately). Simply plugging in a subwoofer will assign a high-pass filter to the STAGEPAS 400i speakers automatically.

    EQ & Level Control: The Yamaha STAGEPAS 400i is equipped with a 1-knob Master EQ & level dial, as well as a 2-Band EQ and level dial for each channel.

    • 1-Knob Master EQ & Level Adjustment: The 1-Knob Master EQ (Speech-Music-Bass Boss) & Level Control (0-10) gives you instant control of your mix, allowing you to match your sound to your surroundings. Simply turn the knob to optimize the EQ for speaking engagements, musical performances, or just to kick in more bass; getting your sound right has never been so easy.
    • Channel EQ & Level Adjustment: You'll also be able to assign detailed EQ and level settings to each channel for precise management of your final sound. The 2-band Channel EQ (8kHz/100Hz) & Level Control (0-10) on the STAGEPAS 400i makes setup easy and precise.
    Note: A level meter, consisting of five LEDs, shows the level of output signal from the STAGEPAS 400i's speaker outputs (L/R).

    SPX Digital Reverb (optional Reverb Footswitch): One knob gives you access to four different high-quality reverb settings (Hall, Plate, Room, Echo); perfect for vocals and acoustic instruments. Simply turn the knob to change the reverb type and time, and then you're ready to apply just the right amount of high-resolution effect to each channel. For hands-free control of your reverb, connecting an optional footswitch (sold separately) allows you to turn the reverb on and off instantly; perfect for MC-ing events or speaking during solo performances.

    Feedback Suppressor: Avoid the uncomfortable feedback that plagues so many sound reinforcement novices and professionals alike. Usually found only on high-end gear, this intelligent function removes feedback automatically with the push of a button, giving you a clear, professional sound.

    iPod/iPhone Connectivity: Connect your iPod/iPhone using a USB cable to play music and charge the iPod/iPhone. Use the "LEVEL" control of channels 7/8 to adjust the volume, since the music signals are mixed to those channels. This connector supplies 5V power to the connected USB device. This connector does not support digital audio playback from USB devices other than the iPod/iPhone. For playback of such devices, use appropriate stereo minijack or RCA connectors.

    Input Characteristics:

    Input Terminals Connector Mic/Line Input Impedance Source Impedance Input Level
    Sensitivity Nominal Max Before clip
    Channel Input 1-2 XLR-3-31 Mic 3kohm 150 ohm mics -56 dBu -35 dBu -10 dBu
    Line -30 dBu -9 dBu +16 dBu
    Channel Input 3-4 XLR Combo  XLR Mic 3kohm 150 ohm mics -56 dBu -35 dBu -10 dBu
    Line -30 dBu -9 dBu +16 dBu
    Phone Mic 10kohm (Hi-Z 1 MΩ) 150 ohm lines (Hi-Z 10 kΩ) -50 dBu -29 dBu -4 dBu
    Line -24 dBu -3 dBu +22 dBu
    Channel Input 5/6 Phone, RCA Line 10kohm 150 ohm lines -24 dBu -3 dBu +22 dBu
    Channel Input 7/8 Phone, Stereo Mini Line 10kohm 150 ohm lines -24 dBu -3 dBu +22 dBu

    Output Characteristics:

    Output Terminals Connector Output Impedance Load Impedance Output Level
    Nominal Max Before Clip Type at THD+N 10% Dynamic
    Speakers Out (L, R) Phone <0.1 4 speakers N/A N/A 180W 200W
    Monitor Out (L, R) Phone 600 10k lines +4 dBu +20 dBu N/A N/A
    Subwoofer Out Phone 150 10k lines -3 dBu +17 dBu N/A N/A


    • PA Speakers: 11.375" (w) x 18.5625" (h) x 10.875" (d); 16.5625 lbs
    • External Power Mixer: 12.125" (w) x 7.1875" (h) x 4.5625" (d); 6.1875 lbs

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