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Description
auto filter pedal Maxon 9-Series AF-9 Auto Filter Pedal – Walt Grace VintageOur Take: Maxon's AF 9 Auto Filter has been a favorite of musicians since its release back in 1981 offering a potent mix of auto wah and swept filter effects that adds gorgeous, watery, three dimensional filtering effects reminiscent of the most sought after vintage units. The AF 9 may look slightly different than it used to, but rest assured: it's still the same intuitive, powerful, and compact pedal that it always has been. Maxon's Take: The Maxon
Our Take:
Maxon's AF-9 Auto Filter has been a favorite of musicians since its release back in 1981 - offering a potent mix of auto-wah and swept filter effects that adds gorgeous, watery, three-dimensional filtering effects reminiscent of the most sought-after vintage units. The AF-9 may look slightly different than it used to, but rest assured: it's still the same intuitive, powerful, and compact pedal that it always has been.
Maxon's Take:
The Maxon AF9 Auto Filter takes the most desirable auto-wah and swept filter effects and offers them up in a compact, user-friendly package. Opto-coupler circuitry produces the shimmering, watery filtering of legendary vintage units. Threshold and Peak sliders control the degree of effect; while Range and Drive switches determine range and direction of the filter sweep. Three selectable filter types (Low Pass, Band Pass, and Hi Pass) and a frequency range of 100 Hz – 4 kHz allow the AF9 to function with virtually any instrument or input signal.
Standard Specifications
General Info
| Model: | AF-9 |
| Type: | Auto Filter |
| Input: | 1 x 1/4" (Instrument) 500k Ohms |
| Output: | 1 x 1/4" (Main Out) 10k Ohms or less |
| Bypass: | True Bypass |
| Width: | 2.9 in |
| Height: | 2.13 in |
| Depth: | 4.9 in |
| Weight: | 1.3 lbs |
| Power Source: | 9v DC |
| Power Usage: | 17 mA |
| Battery: | 9 v |
| Condition: | New |
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Exchange/Return Notes
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4.4 ★★★★★
Based on 1298 reviews
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Product Reviews
★★★★★ 5
Huge Upgrade to my trusty V1 Robot
We've had one of the first model robot vacuums from the og manufacturer which has been a workhorse for us for years! It's the drunk uncle of robots though, no bells and whistles, just your basic robot that runs into everything but gets the job done in some random chaotic pattern. Seeing this on sale and finally just going for it to see how good newer models have gotten (no more separate virtual wall lazers, a nice easy to use app, no more bumping around clumsily!, and more). Well, long story short, they have gotten soooo much better and I'm incredibly glad I gave this one a try. It's is running flawlessly, cleans very well, i love the ease of the app and setting up no-go zones, and pretty much everything else has been an upgrade. Looking forward to many years of our new bot and a cleaner, less noisy, less drunk uncle of a bot around the house. (Don't worry, drunk uncle is still getting his time in down in the basement. He's old reliable at this point and will go as long as he wants to.) This is a great vac that performs wonderfully with all the functions and conveniences I need (i haven't tried the mopping function yet but didn't really buy it for that) at an incredible price point, esp when on sale. If you're looking to upgrade like I did, it's well worth it. If you're looking at your first robot and are unsure if it's something you really need.... trust me, get it. It will save you time, knock one thing off your million item to-do list, and will soon become something you are unsure why it took so long to try.
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Reviewed in the United States on April 26, 2025
★★★★★ 2
Updated Review: error code and quit working after only 3 weeks.
Update! I absolutely loved this vacuum.....for about 3 weeks. I ran it every day. I loved loved loved the mapping feature that allowed me to select which rooms of my house I wanted it to clean. It did a pretty good job and I was so happy with it. I took good care of it and cleaned the filter and emptied it often. It was great ...until it didn't work anymore. Fan error: error 155 called for me to factory reset the vacuum which I did 3 times but it still wouldn't go more than about 30 seconds before stopping and giving me the internal error code again. After researching the code (because the website and help book on the app don't list this code in their troubleshooting guide) apparently this is a common thing for this particular model (the Q5 pro) to do. And most of the time it isn't fixable. We were still within the time frame to return it through Amazon so we decided to do that rather than contact customer service in hopes that they might fix it but not and then not be able to return it anymore. Sadly I won't be buying this brand again for a while. My previous vacuum (roomba) lasted me 5 years and still works, just has old technology. I was really hoping for another vacuum with newer technology like house mapping to last me a long time as well. I most likely will be returning to the Roomba brand. Which is sad because this seemed like a great vacuum with great features for a good price. I hope roborock improves their models and fixes these error issues and maybe one day I'll give them a try again. Maybe.
Original review: I love this vacuum. I had another brand that was 5 year old technology and just caused more headache than help. This one is a huge improvement. I love how it initially mapped out my house and I was able to divide and name the rooms in the app. Now I can tell it to clean only certain rooms or the whole house and it does great and doing only the rooms I want it to do. I connected it to my Google speaker as well and now I can tell google to make my roborock clean my kitchen. I can also control it and monitor it from the app even when I'm not home. The mop feature isn't great. It really doesn't clean, more just puts water on the floor and leaves dirty streaks. But I didn't buy it for the mop function. If it does a great job vacuuming, which it does, I'm happy with it.
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Reviewed in the United States on January 6, 2025
★★★★★ 5
Robot Vacuum
Color: White
Our robot vacuum is called Mildred and she works fine.
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Reviewed in the United States on April 16, 2026
★★★★★ 5
Lazy girl’s best friend!
Color: K5b-white
Perfect. Picks up perfectly including dog hair. Perfect for a “lazy” person like myself . Well recommended! Very easy on the pockets!
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Reviewed in the United States on May 12, 2026
★★★★★ 5
Amazing!!!
Color: White
I purchased the OKP Life robot vacuum in 2024, and as of 2026, it continues to perform exceptionally well. It has proven to be a highly reliable product, exceeding my expectations in terms of durability and long-term performance.
This device has significantly simplified my cleaning routine and saved me a considerable amount of time. Its suction power is sufficient to effectively remove dust, crumbs, and pet hair without difficulty. Additionally, it navigates around furniture efficiently and rarely becomes obstructed.
Another notable advantage is its relatively quiet operation compared to traditional vacuum cleaners, allowing it to be used at any time without causing disruption. It is also very user-friendly and maintains a consistently clean environment with minimal effort.
Overall, I highly recommend this vacuum. It is dependable, well-constructed, and represents excellent value for its performance.
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Reviewed in the United States on May 31, 2026
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