Good but...
It's a handy calculator but it's lacking a high pass 2nd order filter (12dB per octave). A Zobel calculator, attenuation calculator and third order filters would be nice too.
$0.99
Price history
About
This application assists in calculating electronic filter components for speaker systems. It automatically determines inductor and capacitor values based on desired impedance and cutoff frequency, and designs circuits for various speaker types. Users can visualize frequency and phase diagrams for their custom speaker designs.
✓Automatic electronic component calculation
✓Frequency and phase diagram display (Bode plots)
✓Electronic circuit schema display
✓Support for various speaker types (high, mid, low, sub)
✓First and second-order filter design
✓Complete filter theory and formulas
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What's New in Filters
2.3
January 9, 2026
* Minor bugs fixed
User reviews
Developer apps
FAQ
What kind of filters can Filters calculate?
Filters can calculate electronic filter components for high, medium, low, and subwoofer speaker systems. It supports both first and second-order filter designs.
Does Filters display circuit diagrams?
Yes, Filters displays the electronic circuit schema for the calculated filters. It also provides complete theory and formulas for all implemented filter types.
What are the system requirements for Filters?
Filters is available for iPhone. The latest version is 2.3, and it was last updated on January 9, 2026.
How much does Filters cost?
Filters is a paid application and costs $0.99. It does not appear to have any in-app purchases or advertisements.
What is the user rating for Filters?
Filters has a rating of 3.0 stars from 1 rating. This indicates a mixed reception from its current user base.
Can Filters design filters for specific speaker impedances?
Yes, the application automatically calculates electronic component values based on the desired speaker impedance and the cutoff frequency.
Does Filters provide visual representations of the filter's performance?
Yes, once a filter's circuit is calculated, the app automatically designs and displays frequency and phase diagrams (Bode plots) for the circuit's electronic components.
Is Filters suitable for beginners in speaker building?
Filters provides automatic calculations and circuit designs, along with complete theory for formulas. This can be helpful for beginners, but a basic understanding of electronics is still recommended.
