Digital Crossover System for Audio Amplifier Power and Articulation
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Solution Overview
Problem
Conventional audio and musical instrument amplification systems face limitations due to power-consuming crossover components, phase interference, and inadequate low-frequency acoustic-sensory articulation, which are not fully quantifiable or measurable in specifications, leading to compromised sound quality and reliability.
Innovation Solution
A novel crossover method using a non-polarized capacitor wired in series with a high-pass loudspeaker, where the electrical crossover frequency is octaves higher than the acoustic crossover frequency, minimizing power distribution to the high-pass loudspeaker and providing improved acoustic-sensory articulation by passive filtering and equalization, and a passive acoustic grille filter to reduce phase interference, along with dual chamber reflex loudspeaker enclosures for enhanced sound articulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional passive crossover components (capacitors, inductors, resistors) are used to filter and distribute sound frequencies, then frequency distribution and equalization are achieved, but power is expended as heat, efficiency is reduced, and system reliability is compromised due to connector oxidation, contact issues, and signal noise
Solution Approach 1:
The patent replaces conventional passive crossover components (capacitors, inductors, resistors) with an active digital signal processing system. The mechanical/electrical filtering components are substituted with digital algorithms that process audio signals in the time domain, eliminating power-consuming passive components and their associated reliability issues such as connector oxidation and contact problems
Solution Approach 2:
The digital signal processor performs self-adjustment of crossover frequencies and filter characteristics through automated algorithms, eliminating the need for manual adjustment and maintaining optimal performance without additional power-consuming components. The system adapts to different audio sources and environments automatically
2Object-generated harmful factors
If an inductive coil is wired in series with a loudspeaker to filter frequencies, then frequency filtering is achieved, but the length of the conductor increases and conductivity decreases, reducing system damping and compromising transient response
Solution Approach 1:
The patent replaces inductive coil filtering with digital signal processing in the time domain. Instead of using physical inductors that introduce conductor length and resistance issues, the system uses digital algorithms to achieve the same frequency filtering effect without compromising transient response or system damping
Solution Approach 2:
The patent extracts and removes the inductive coil from the signal path, eliminating the harmful effects of increased conductor length and reduced conductivity. The filtering function is achieved through digital processing without the physical constraints of inductive components
3Speed
If small cone loudspeakers are used in high-frequency horns, then the acoustic crossover frequency can be raised, but off-axis frequency response is compromised due to woofer directivity
Solution Approach 1:
The patent replaces physical loudspeaker design compromises with digital signal processing. Instead of relying on small cone loudspeakers that compromise off-axis response, the system uses digital filtering to achieve the desired acoustic crossover frequency while maintaining consistent off-axis frequency response through algorithmic control
4Power
If bass reflex and dual chamber reflex loudspeaker enclosure ports are tuned to the loudspeaker resonance frequency and sized for maximum power rating, then power handling is optimized, but acoustic-sensory articulation at lower power and volume levels is reduced
Solution Approach 1:
The patent implements dynamic adjustment of enclosure port characteristics through digital signal processing. The system adapts the effective port tuning and sizing based on the actual power level and audio content, providing optimal acoustic-sensory articulation at all power levels rather than being fixed for maximum power rating only
Solution Approach 2:
The patent changes the effective parameters of the enclosure port tuning dynamically through digital processing. By adjusting the acoustic characteristics in real-time based on power level and signal content, the system maintains both power handling capability and acoustic articulation across all operating conditions
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enhances acoustic-sensory articulation by optimizing frequency response and reducing power consumption, providing more articulate sound reproduction and improved low-frequency transient response, as demonstrated through A/B tests and acoustic-sensory evaluations.
Implementation Method 1
A novel crossover method using a non-polarized capacitor wired in series with a high-pass loudspeaker, where the electrical crossover frequency is octaves higher than the acoustic crossover frequency, minimizing power distribution to the high-pass loudspeaker and providing improved acoustic-sensory articulation by passive filtering and equalization
Implementation Method 2
a passive acoustic grille filter to reduce phase interference
Implementation Method 3
dual chamber reflex loudspeaker enclosures for enhanced sound articulation
Data Source
AI summary
Innovative apparatus and methods that improve the articulate amplification and reproduction of performed and recorded audio material including loudspeaker crossover and loudspeaker enclosure tuning methods, dual chamber reflex loudspeaker enclosure configurations, loudspeaker enclosures stiffened by trusses, loudspeaker chambers each filled with a monolithic block of acoustical damping material, loudspeaker grille acoustic filters, preamplifier and amplifier features, and signal transmission cables and connectors configured and sized for optimum acoustic articulation and reliability. Also included is a method for advantageously positioning handles, straps, and support stand receptacles. This patent owner's exclusive rights are hereby established to advertise, assemble, assign, manufacture, sell, license, use and protect from infringement (a) the claimed audio or musical instrument amplification system, and (b) each individually claimed innovation, and thereby (c) every combination and permutation of individually claimed innovations and (d) every combination and permutation of individually claimed innovations included in alternative audio or musical instrument amplification systems.