SKU: 18785624410

PowerBox Competition SR2 4450

Sale price$202.50 Regular price$225.00
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Description

PowerBox Competition SR2 4450PowerBox Competition SR2 4450 Features 22 channels High performance battery backer with high continuous load capacity 2. 4 TFT screen, legible in sunlight Bi lingual menu system Consistent duplication of all power electronics Redundant electronic switch Servo matching for all 22 outputs Auto matching function Two independent door sequencers with Setup Assistant The latest integrated iGyro technology, using the iGyroSAT as gyro sensor Twelve

  • PowerBox Competition SR2 4450
  • Features

    • 22 channels
    • High-performance battery backer with high continuous load capacity
    • 2.4” TFT screen, legible in sunlight
    • Bi-lingual menu system
    • Consistent duplication of all power electronics
    • Redundant electronic switch
    • Servo matching for all 22 outputs
    • Auto matching function
    • Two independent door sequencers with Setup Assistant
    • The latest integrated iGyro technology, using the iGyroSAT as gyro sensor
    • Twelve independent gyro outputs for: 4x aileron, 4x elevator, 4x rudder
    • Individual gain control for all twelve gyro outputs

    Technical Data

    Operating voltage 4.0V - 9.0V
    Power supply 2S LiPo, 2S LiIon, 2S LiFePo, 5S NiCd/NiMH
    Current drain Power-on state 260mA
    Current drain Standby 30µA
    Maximum load current 2 x 20A (<30s)
    Drop-out voltage 0.3V
    Output voltage 6.0V, 7.4V, 7.8V, unregulated
    Signal input serial

    Set contents

    • PowerBox Competition SR2
    • TFT Display
    • SensorSwitch
    • 2 patch-leads
    • 4 rubber grommets and brass spacer sleeves
    • 8 retaining screws
    • Operating instructions in German and English

    Product description

     

    It is now ten years ago to the month that the first Competition SRS was introduced. At that time it represented a milestone in the redundant deployment of receivers using our new type of bus technology. The unrestricted output assignment, servo matching and linking to early telemetry systems were unique features, and remained so for a long time.

    Technology has continued to develop, and modellers' requirements have become more exacting. Here at PowerBox Systems we are proud to present our latest development: the PowerBox Competition SR2. Incorporating a new external look and the very latest technology, this single unit integrates more than twenty years of experience in the design and construction of airborne electronics.

    The external changes are immediately evident: the most obvious and eye-catching feature is the new full-colour TFT screen, which is clearly legible even in full sunshine. The size of the screen has allowed us to include a self-explanatory menu structure which is so simple to use that its operation has raised not a single query from our test-pilots. Another obvious change is the large heat-sink, machined from solid metal, which significantly enhances the performance of the power supply. At the same time we were able to reduce the overall size of the Competition SR2 substantially. The associated Sensor-Switch and TFT screen are also housed in a machined aluminium case, matching the quality appearance of the SR2 itself.

    However, the most significant innovations only become evident once the unit is switched on. The main display contains all the essential data - including battery voltage, current, consumed capacity and all receiver-relevant information - which can be viewed at a glance. The screen also displays status messages concerning the iGyroSAT or GPS III, if connected to the system.

    The menu system is clearly and logically laid out, and includes many new functions as well as the familiar menu points - and all in two languages: German and English! Important new features implemented in the new Competition SR2 include the most efficient and sophisticated iGyro technology ever developed by PowerBox-Systems.

    Used in conjunction with the optional iGyroSAT sensor, the system offers twelve gyro axes which cater for every existing model variant. The highly refined Setup Assistant enables the pilot to set up complex models, such as types with dual thrust vectors, ailerons and tailerons, in just a few minutes. Once the Assistant has been completed, the transmitter channels are assigned, the directions of gyro effect are set, and the servos connected to the outputs.

    Each gyro axis can also be finely adjusted individually from the transmitter using separate channels. If an initial test-flight shows up a need to fine-tune the iGyro to meet individual requirements, a whole series of Expert settings cover every possible need.

    The servo matching feature is now displayed in graphic form on the screen, and the PowerBox Competition SR2 also allows the servo response to be adjusted using five curve points. A new development is automatic servo matching. It is a very simple matter to assign and select one or two servos in addition to the primary one, and these two or three servos can be matched accurately to each other in just a few seconds with a single button-press!

    The Competition SR2 incorporates two independent door sequencers. The standard function is designed for a retractable undercarriage, while the second can be used to implement systems such as a latching canopy control system without any additional devices. The Setup Assistant is capable of setting up the first door sequencer in just a few minutes, and three modes of operation are available. The graphic on-screen display makes additional non-standard settings very easy to set up; the entire sequential process can be observed at a glance.

    If you use a PowerBox or Jeti RC system, virtually all* the functions of the Competition SR2 can be controlled and adjusted from the transmitter. The SR2 caters for every aspect of telemetry for battery and receiver data with all supported systems. If a GPS III is connected, then GPS data are also available - limited only by the facilities of the RC system in use.

     

     

    *except the sequencers and Setup Assistant

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 18785624410

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4.8 ★★★★★
Based on 15 reviews
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M
Verified Purchase
Mike
Omaha, US
★★★★★ 5
Outstanding Chair
Color: Matte-black
This is an outstanding chair. It’s very well built and has handled up to 300 lbs. with no issues after a couple of weeks of use. The engineering is excellent, the assembly was straightforward, and everything fit together exactly as it should. No stripped bolts, no misaligned holes—something anyone who has assembled other furniture will appreciate. Overall, it’s sturdy, well-designed, and extremely comfortable. The adjustable armrests are a standout feature and make a big difference in day-to-day use.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 21, 2026
B
Verified Purchase
Buyer of Strange And Random Things
Draper, US
★★★★★ 4
Comfortable, goes together well, a couple of worries about longevity
Color: Matte-black
This is a chair with a lot to like, and a couple of concerns. Let's do the pros-and-cons thing. Pros: * Excellent assembly manual and parts organization. The manual is well-written; if it's translated from another language, it had a pass by a fluent English speaker. Folks, any time you localize, have a native speaker of whatever language you're going into give it a once-over. Also, the manual had a few ergonomic hints that will help with comfort. A nice touch. * Comfortable. I'm not a huge guy (6'1" 240 lbs, yes I need to lose a little) but I do sometimes have fit trouble in a standard chair (mostly due to long legs rather than a wide... seating surface). This is a good chair for a tall person, but as the arms are outward adjustable at the time you build it (and with a little bolt turning after), this will also allow for folks who are plus-sized. You can also leave them off completely if you want (which isn't true of all office chair designs). * Assembles well. Good fit and finish. All the bolt holes lined up, it was well packaged and arrived undamaged. * The parts card includes one extra of every bolt type. This is very much appreciated, even though I didn't need the spares. Every flat-pack manufacturer should do this. Cons: * The seat cushion is very firm. I wouldn't describe it as "hard", and I understand why (the foam won't compress all the way to the seat pan for folks at the maximum weight range this chair is designed for). We'll see what it's like after a long day. Also, very stiff foam like this does tend to break down over time. Ask me again in a year. * The support tubes for the leg rest seem flimsy, and the brackets through which the leg rest support tubes extend are plastic. I'm skeptical how much weight they can support, but I don't plan on using the leg rest anyway. * The cushion that comes with it can be used for either neck or lumbar support, which is nice, but it's held on by an elastic band that attaches with a mechanism similar to some bras. It'll come off when you don't want it to (i.e. adjusting it) but is a pain to re-attach when you do want it to. Insert standard stand-up comedy joke here. A pinch-buckle would have been better. * Cheap casters. But I ordered better ones, and it should be fine. Note that the manual and box have different branding. That's not uncommon, as many things like this are sold under different brands even though the product is identical across the brands. Must be an Amazon/bookkeeping thing. Overall, this seems to be a good chair. I like its appearance, it's comfortable so far, and assembling it wasn't a terrible ordeal. The price is also good for what you get. With the caveat of "let's see what longevity is like" and "better casters would be appreciated" I do recommend it.
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Reviewed in the United States on September 5, 2025
J
Verified Purchase
Joe
Boise, US
★★★★★ 5
Great chair - great customer service from seller
Color: Matte-black
Good chair for home office. Easy to assemble and comfortable to use. I was concerned when it arrived as the bottom of the box had gotten wet and damaged during shipment. But the only issue was the frame for the footrest had rusted in a couple places. I contacted the company, sent pictures and in a couple of days they shipped back the complete footrest already assembled. Great customer service and so far a great chair.
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Reviewed in the United States on April 22, 2026
A
Verified Purchase
AJ
Fort Morgan, US
★★★★★ 5
Very Impressed
First off, I just want to say that this is a very good company. They have the best customer service that I have seen with any online company that I have ever dealt with. Other companies should take notes on how they should handle problems from this company. Now On to my review of this chair. I purchased the chair almost 5 months ago now and was pretty hyped about getting it. It is not very easy to find a chair for a larger person. I weigh 299 pounds and needed something that would support that. Some of the other office chairs I have had in the past said that they did support up to and over my weight and the gas cylinder would always give out. So far, I have not had any issues with it. Now I did have a few problems with the chair, and the company fixed the problem right away. The first was comfort. When I first got the chair, it was kind of stiff which is expected of a new chair. But the wings on the side of it would rub on my legs making it painful to sit in the chair for more than an hour. It seemed that the metal bars in it were too far pressed in. I contacted the company about it to see what they could do to fix the problem and they sent me out a cushion to help raise me above the cushion. That was good enough for me. Eventually I ended up not having to use the cushion. (I was working on losing weight.) They second problem happened with the wheel base. One of the supports that held the wheels in place had come apart. I contacted the company right away and sent them a picture of the problem and they sent me out a new base. Not the easiest to change out once you have set it in place. But after watching videos on YouTube I was able to get it replaced. Now 4 months later I did have another issue with the chair which actually happened to me 1 week ago now from this date. My arm rests were moving around a lot and I didn't understand why. So, I flipped the chair over to check and see if the screws had come loose. They were not loose at all. I then went ahead and took the arm rests off and as soon as I did I noticed a metal bar had fallen. I removed the felt that was hiding it and seen that the welds that held the bar in place had failed. I am not going to lie I was pretty bummed about it. I contacted the company and explained to them what happened, I sent in pictures to show the problem. They got back to me within hours of my complaint and sent me out another seat to replace the old one. I just got it 2 days ago and put it on and all is good again. Now one thing I noticed about the new chair seat is that the metal bars are not sticking in my side. Either I have lost weight (I have.) or they have fixed that problem. Either way I am completely happy. Now I am sure that there are other chairs out there that are a bit better in comfort but they also cost a lot more. This is a very nice chair for anyone looking to get a gaming office chair and not break the bank in the process. Just a few pros and cons about the chair. Pros: 1. Great Customer Service from the company. They actually uphold a warranty. 2. Affordable price for a gaming office chair. 3. The recline feature comes in handy and is really nice. Cons: 1. The arm rests should be a bit higher or be able to extend higher then what is allowed currently. 2. Not the most comfortable chair if you sit in it for extended times. More cushion could help this problem. Overall, I am really happy with my purchase and would recommend and use this company again in the future. I hope that someone finds this review helpful when going to purchase a affordable office chair.
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Reviewed in the United States on August 7, 2018
K
Verified Purchase
KC
Port Orchard, US
★★★★★ 5
A no-brainer.
Color: Earth-black
Impressed! The shipping took less than 3 days when it showed 7-8 days. Cool. The box showed up at my door. It's pretty big & quite heavy, prolly not for grannies to pull inside (which usually means at least decent quality, right? ~80-ish lbs, maybe?). Opened the box & it looks more complicated than it is. Parts. And parts. And more parts. But VERY straightforward & simple, even for those less mechanically inclined (not me, thank gawd). I read the 1st panel on the instructions, & it made perfect sense, so I traded out their supplied tool for one on my drill. Zip. Zip. Zip. It's all put together & sitting in it in 42 minutes. Comfortable. Relaxing. Sturdy. Pretty high of a lift. Tall back. Make sure you have enough room for this, it's substantial. I have a feeling I'll be spending some nights zonked out in this. Hope it lasts. Whoever designed this made it super easy. Even a caveman could do it! Thank you, China! (I waited 'til it was on sale for abt $160-ish. Yes, even w/ these ~eyeroll~ tariffs.). Worth it.
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Reviewed in the United States on February 21, 2026

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