Electro Harmonix Nano Bassballs
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Essential Information About the Twin Tuned Filters Effect Pedal
Essential Information About the Twin Tuned Filters Effect Pedal
- Double Tuned Filter: two narrow filters sweep the signal to create a particularly expressive "vocal" timbre.
- Envelope Control: the sweep follows your playing dynamics (attack, intensity), for natural and musical inflections.
- True Bypass: preserves your tone when the effect is off.
- Robust Format: compact die-cast chassis, ideal for pedalboards, with included 9V battery.
Manufacturer Information
Electro Harmonix
https://www.ehx.com
info@ehx.com
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A "Speaking" Effect in the Envelope Filter Family
The Twin Tuned Filters belongs to the tradition of dynamic filtering effects that transform the attack of your playing into tonal movement. Here, the originality comes from the simultaneous sweep of two narrow filters: instead of a simple "auto wah," you get a more articulated texture, close to a formant (the sensation of vowels), perfect for highlighting a riff or giving personality to a clean line.For Whom, Which Styles, and In What Contexts?
This pedal is aimed at guitarists and bassists (or keyboards and synths in mono output) who want to add a vocal grain and organic animation to their sound. It excels in funk (chicken scratch, syncopated riffs), in rock to thicken a lead, and in electro/ambient to create lively sweeps on clean or slightly overdriven sounds.In the studio, it brings an immediately identifiable character, useful for differentiating a take without overloading the arrangement. Live, it remains intuitive: the envelope response follows your right hand, making nuances easier without using an expression pedal.
Controls, Design, and Power Supply: Essentials for Simple and Reliable Use
The heart of the Twin Tuned Filters is an analog circuit designed to preserve dynamics and playing feel. The effect relies on two narrow filters that move under the envelope's action: the harder you attack, the more the sweep expresses itself, allowing you to go from a subtle shimmer to a very "speaking" sound depending on your touch.The true bypass ensures a direct signal when the effect is off. Regarding power, the pedal can run on a 9V battery (included), or via an optional power adapter, convenient for a continuously powered pedalboard.
Sound Character
The Twin Tuned Filters' sonic signature is a very marked vocal-like rendering: the two narrow filters precisely sculpt the midrange, producing attacks that "speak" and a presence that easily stands out in a mix. On a clean sound, you get a clear and percussive movement; with overdrive or fuzz upstream, the filter becomes more aggressive and can take on an almost synthetic color. The dynamic response encourages expressive playing: the more controlled your attack, the more musical and articulated the effect becomes.Technical specifications
| Effects | Envelope / Auto-wah | Type | sector |
| Technology | Analog | Use | electric bass |
| Format | Pedal | ||
| Bypass | true bypass | Power consumption | 3 mA |
| Audio | mono | Required voltage | 9V |
| Power adapter (optional, not included) | 9.6V DC, 200 mA | Dimensions | 4.5 x 2.75 x 2.1 inches |
Customer reviews
What customers say
Summarized and selected by AI from recent customer reviews
This auto-wah/distortion pedal delivers funky, psychedelic effects at an excellent price point. Customers praised its simplicity and unique sound, calling it "super effective" and "original." However, some noted build quality issues including poor 9V jack machining, flimsy construction, and lack of filter adjustment controls.
Review highlights
- “Super funky effect!”
- “Super effective with one knob, lots of possibilities! Very good product.”
- “Effective, economical with a personal sound. At this price: IMPOSSIBLE to beat!”
Based on 10 reviews
- 2 stars, 0 reviews
- 1 star, 0 reviews
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Nice effect quite psyche. I use it sparingly. But it has the gift of enriching and giving another color. I wouldn't say it's the essential pedal on my Pedalboard but for the price... it can do the job when you lack ideas. We switch on and we see what we can get out of it. And sometimes it jumps...
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Good pedal, no fuss about the settings, you really need to know what this effect gives and how to use it.
Small problem: my model had a bad machining at the 9volt socket, which required a little tinkering for it to be properly powered in my pedalboard.
Otherwise nickel;)Automatically translated
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Nice effect quite psyche. I use it sparingly. But it has the gift of enriching and giving another color. I wouldn't say it's the essential pedal on my Pedalboard but for the price... it can do the job when you lack ideas. You switch on and see what you can get out of it. And sometimes it jumps...
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Pedal on the EHX wave: Effective, economical and with a sound as strange (within the auto-wha) as it is personal.
You can hear on the bass part that has that crazy auto-wah of SIR PSICHO SEXY, by RHCP.
There are better auto-wah pedals, but at this price. IMPOSSIBLE!Automatically translated
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Huge and simple a distortion and/or an auto-wah. On the battery sold with, there is even the head of the man at the stove xDD - It's collector- the founder of Electro Harmonix, we can say that he does not lack ego.
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Questions frequently asked
What sound does the Nano Bassballs produce?
The simultaneous sweep of two narrow filters creates a formant-like coloration, with vocal and mid-focused attacks. On a clean sound, the movement remains sharp and percussive; an overdrive or fuzz placed upstream enhances the synthetic character.
Does the Nano Bassballs work with a guitar?
Designed for electric bass, this model is also suitable for guitar. The filters' response depends on the attack strength, allowing the sweep to be modulated by playing style. A mono output from a keyboard or synthesizer can also be used.
What power supply is required for this pedal?
The power supply requires 9 V, via a 9 V battery included or an optional 9.6 V DC / 200 mA adapter, with a consumption of 3 mA.
Is the pedal stereo?
The audio connection is mono. It is therefore suitable for instruments or sources with a mono output, including bass, guitar, keyboard, and synthesizer.
Does the Nano Bassballs alter the signal when it is bypassed?
When the effect is switched off, the bypass passes a direct signal. This design features a true bypass type.



