Precision Audio Components & Custom Crossovers Built for Performance

A passive crossover network is a filtering circuit placed between the power amplifier and speaker drivers. Because single drivers cannot cover the full 20Hz–20kHz frequency spectrum efficiently, the crossover splits the signal: routing high frequencies to tweeters/compression drivers and low frequencies to woofers. This ensures optimal frequency response and protects high-frequency diaphragms from low-frequency overload damage.

The slope dictates how rapidly frequencies drop off beyond the crossover point:

• 6dB/Oct (1st Order): Simplest design, lowest phase shift, but provides limited protection for tweeters.
• 12dB/Oct (2nd Order): The industry standard, balancing component cost, phase response, and reliable power handling.
• 18dB & 24dB/Oct (3rd/4th Order): Extremely fast cutoff, offering maximum driver protection and minimal distortion for high-power PA and line array systems.

We use non-polar CBB22 Polypropylene Film Capacitors (MKP/CBB) rated for 250V–630V on high-frequency paths. Standard aluminum electrolytic capacitors suffer from high ESR, low voltage tolerances, and drift over time due to electrolyte dry-out. Polypropylene film capacitors maintain zero-drift capacitance, minimal ESR, and crystal-clear high-frequency transparency.

High/Mid Frequency Paths: Air-core inductors are ideal because they offer zero magnetic core saturation and exceptional clarity.
High-Power Woofer Paths: Silicon steel or ferrite core inductors are recommended. Their high magnetic permeability reduces the necessary copper windings, keeping DC Resistance (DCR) low to prevent amplifier power loss and preserve low-end bass damping.

We integrate a dual-stage protection design on the HF path:

1. Self-Resetting PTC Thermistors: When power exceeds safe limits, the PTC resistance spikes to limit current. Once cooled down, normal operation automatically resumes.
2. High-Wattage Cement/Aluminum Resistors: Used for impedance matching and L-pad attenuation, safely absorbing thermal energy away from the driver voice coil.

IN+ / IN-: Power amplifier input terminal.
HF+ / HF-: High-Frequency driver connection (Tweeter / Compression Driver).
LF+ / LF-: Low-Frequency woofer connection.
Note: Always maintain correct polarity (+ to +, - to -). Reversing polarity can cause phase cancellation, creating a noticeable dip in mid-range response.

Using a 4Ω woofer on a 8Ω-rated crossover filter will double the crossover point frequency for the woofer path. While it works safely, it shifts your intended acoustic crossover frequency. We provide custom circuit matching for mixed impedance driver setups (e.g., 4Ω+8Ω or 8Ω+16Ω) upon request.

Yes. We offer fully custom double-sided 1.6mm FR-4 glass-epoxy PCB layouts tailored to your exact cabinet cutout dimensions, terminal plate spacing, mounting screw holes, and silk-screened brand logos.

All heavy inductors and large capacitors undergo dual physical anchoring: industrial-grade RTV silicone / hot-melt adhesive bonding at the base, combined with high-tensile nylon cable ties anchored directly through the FR-4 PCB board to survive high-SPL acoustic vibration and shipping drops.

Yes. We offer complete harness wiring services using high-purity OFC cables pre-soldered with insulated quick-connect spade terminals, gold-plated pins, or authentic Neutrik Speakon connectors for plug-and-play cabinet integration.

This indicates that the integrated PTC overload protection switch has activated due to excessive input power. Lower the amplifier gain or pause playback for 1–2 minutes. The PTC thermistor will cool down and automatically restore audio output.

Yes, this is completely normal. Attenuation resistors (cement or aluminum-cased) dissipate excess electrical energy as heat to equalize sound pressure level (SPL) differences between the woofer and tweeter. Our crossovers utilize flame-retardant FR-4 substrates and 30W–50W heavy-duty power resistors engineered to handle continuous operating temperatures up to 150°C safely.