Yamaha STAGEPAS 400I 400W Portable PA System

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Portable and powerful.

The new STAGEPAS is a powered mixer and set of PA speakers that comes in a single lightweight package, an ideal solution for many bands, solo entertainers and public speakers. It features two sleek, lightweight speakers and a detachable powered mixer, along with one pair of speaker cables and a power cord, giving you a complete, extremely portable sound solution that can be set up quickly and easily in a variety of configurations and environments. By combining new high-efficiency amplifiers, newly designed speakers, and high performance DSP, the new STAGEPAS 400i delivers 400W as well as substantial improvements in sound quality and reliability. Complementing the boost in performance, the addition of iPod/ iPhone connectivity, SPX digital reverbs, an onboard feedback suppressor and more versatile EQ, has improved functionality and ease of use considerably, allowing STAGEPAS to meet the demands of a much wider range of applications and users.

iPod connection: Enjoy high-quality playback while also charging your iPod/ iPhone so you never have to worry about a drained battery messing with your performance.

SPX reverb: One knob gives you access to four different high-quality reverb settings, 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.

One-knob EQ: This new function gives you instant mastery 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.

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.

Speaker design: The new speaker design lets you deliver evenly-distributed, high-quality sound to a greater coverage area, so that the entire audience shares the same sonic experience.

  • Clean power, and lots of it
  • Award-winning reverb processor
  • Lightweight

Order now and increase your ease of transport while improving your sound.

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by PowerReviews
YamahaSTAGEPAS 400I 400W Portable PA System

(based on 2 reviews)

Ratings Distribution

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Reviewed by 2 customers

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Great, loud sound in a tiny package


from SE Iowa

About Me Professional Musician


  • Clear Sound
  • Compact
  • Durable
  • Easy To Use
  • Lightweight
  • Versatile


  • No monitor sends
  • Small Storage Compartment

Best Uses

  • Events
  • Karaoke
  • Mobile DJ
  • Performances
  • Presentations
  • Small Band Gigs
  • Stage Monitors

Comments about Yamaha STAGEPAS 400I 400W Portable PA System:

First, a little info about me and why I bought the Stagepas 400i: I'm a working musician of 25+ years and a mobile DJ. I bought this unit to use as stage monitors in a rock & blues band, and for PA use at small gigs and family events. Here's a summary of the pros & cons:

Sound is clear, full, and surprisingly loud for it's size
Great bass for an 8 inch woofer
Excellent for vocals
Incredible, massive sound when hooked to a good powered subwoofer
Ridiculously small & easy to pack around
Full featured mixer
Very easy and quick to get the right mix
Dead quiet. No hum or other noise at all.
Superb stereo reverb section
Solid build quality
Comfortable handles
Flexible and expandable with monitor and sub outputs
Tips on it's side for stage monitor use
Built-in storage compartment for power and speaker cables
No plastic cabinet rattle at high volumes
Attractive design

No individual monitor sends on each channel
Storage compartment a bit small
8 inch woofer isn't gonna rock a big room (but you probably already know this.)
Slick plastic cabinets might scratch easily

Yamaha clearly put a lot of thought into this thing. If you have realistic expectations and don't expect massive bass out of a tiny speaker, (though the bass is surprisingly beefy for an 8 inch woofer) this is the ideal compact PA… Great for wedding DJs looking for a "supplemental" PA for smaller gigs, musicians wanting compact vocal stage monitors, a PA for "coffeehouse" gigs, jamming or practice, backyard parties, home karaoke, etc.. Add a good powered sub, (I tried a QSC powered sub on it) and this thing becomes a little monster, easily handling most bar or wedding gigs. Compared to my other powered cabs, my larger and much more powerful (500 watt RMS-12 inch woofer) EV ELX112P powered speakers obviously pack a lot more punch, and my Alto TS-110A (300 watt RMS) 10 inch powered cabs thump a bit harder than the Stagepas 400i, but they should. They're bigger and have more power.

One thing to note: The monitor outputs on the Stagepas are really line out jacks, sending the line-level stereo main mix to a recorder, another mixer, power amp, or powered speakers. Though you can of course feed a pair of powered monitors the signal, the lack of individual monitor sends on each channel doesn't allow for a separate monitor mix in a band situation. If you have a bigger set of powered cabs, you could also simply use those for the mains and the Stagepas speakers for your stage monitors. The monitor and sub outputs allow for nearly endless expansion possibilities.

There's a lot of compact PA rigs out there, but finding a good, gig-worthy one is tough. The Yamaha Stagepas is clearly a winner. Better design and better sounding than a comparably sized Fender Passport in my opinion, it's THE one to get if you're in the market for such a unit.

I also want to say a few words about the awesome folks at Music 123. The one time I needed customer service, they went way above and beyond to make sure I was happy. Thanks to this kind of dedication to customer satisfaction, Music 123 is the first place I will look for my future gear purchases. They totally rock! :-)

(1 of 1 customers found this review helpful)


"Brilliant Design/Sound, Best In Class"


from NH

About Me Professional Musician

Verified Reviewer


  • 8 Sounds Like 12
  • Acoustic Guitars Shine
  • Compact
  • Core Or Expansion
  • Crystal Clear Vocals
  • Excellent Effects
  • Great Look
  • Lightweight
  • No Feedback
  • Quiet Amps
  • Setup In Minutes
  • Shocking Volume
  • Solid Construction
  • Surprising Bass
  • Well Worth The Cost


  • No Sweepable Mid Eq

Best Uses

  • Amateur Recording
  • Events
  • Monitors For Large Pa
  • Performances

Comments about Yamaha STAGEPAS 400I 400W Portable PA System:

StagePas400i To The Rescue! Due to serious injury I'm never hauling heavy gear again & thought my solo gigging was over. At festivals & venues with in house I've played thru many small/light systems - yes, even those very expensive "breakthroughs." I could never emulate my carefully crafted sound, a 12" was the minimum. Suddenly, I HAD to find one - or hire a roadie (yea right) The search began.

I played my acoustic and sang thru every one I could, A & B'ing all possible. Most were brutal & felt like playing in a tin can & I was losing hope. StagePas 300 & 500 came close but no cigar -serious limitations and very unlike Yamaha - terrible reverb with no ext. loop. Nearing an end one store had a 400i and I was saved.

These new systems are truly unique and brilliantly designed. There's no tin here, just warm, smooth clarity from guitar & vocals with shocking volume capability. The addition of outs for both powered monitors and a sub make for awesome versatility. At a showcase I hosted I added a 12" powered monitor and everyone was impressed. Even a loud duo with a keyboard was crystal clear. I strongly urge anyone looking for a light versatile system to try this or the 600 before spending more than twice as much.

As a producer as well as performer I'm extremely critical of sound quality and if there's a better system in this class I'd be very surprised. In addition to solo, I work with several combo's including a 5 piece blues & rock band and quickly discovered that this is also an outstanding addition or core of a large room system. We quickly replaced heavy powered monitors with the StagePas 400i, making both setup and SOUND better.

Over 30 years, I've used tons of gear and always been pleased with most Yamaha gear, now I thank them for making it possible for me to keep working as a solo without compromising my sound. The only aspect that I feel is missing is a sweepable mid for each channel or at least a 3 band system EQ. It's not a major issue and can be remedied easily by using a pre-amp with EQ. It's also worth noting that unlike most powered mixers there is virtually no hum from the amps when using the stereo record out. This is a long review and plenty of praise remains - Thank You YAMAHA!

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