What is it?

The AAL – Analog Subwoofer Crossover – 19" is a fully analog active low-pass filter designed for subwoofer integration in Hi-Fi, studio and audio systems.

Designed for users who want a simple, musical and effective analog solution without DSP complexity, software setup or digital processing.

This PREMIUM version is housed in a customized 19" rack enclosure and powered by an AAL-designed symmetrical linear power supply developed specifically for demanding audio applications.

The result is exceptionally clean operation, excellent signal integrity and extremely low idle noise.

Why did you make it?

Many subwoofer systems are either:

• overly complex DSP solutions
• noisy low-cost filters
• difficult to integrate into existing audio systems

Many users simply want clean and controlled bass without DSP menus or software setup.

This crossover was designed to provide a practical, transparent and musical solution for seamless subwoofer integration with precise low-frequency control.

Features

• Fully analog active low-pass crossover
• Selectable frequencies: 40 / 50 / 63 / 80 / 100 / 120 Hz
• Cool / Huge bass character adjustment
• “Sweet Spot” sound optimization control
• Independent subwoofer output level adjustment
• XLR and RCA connectivity

Power & Safety

• Supported mains input: 220–240V AC, 50/60 Hz
• IEC C14 mains input with integrated fuse protection (T1.25A slow-blow fuse)
• IEC C13 power cable included
• Internal AAL-designed symmetrical linear power supply
• Designed for indoor Hi-Fi and studio use

XLR/RCA Connectivity

• Left / Right inputs
• Left / Right outputs
• Dedicated subwoofer output

Typical Applications

• Hi-Fi subwoofer integration
• Studio monitoring with subwoofer
• Active speaker systems
• Mobile studio setups
• Analog audio systems requiring simple bass management

Included

• Ready-to-use AAL – Analog Subwoofer Crossover – 19"
• Integrated AAL symmetrical linear power supply
• IEC C13 mains power cable included
• Fully assembled and tested unit

What makes it special?

Want simple, musical and analog bass integration?

• No software setup, DSP headaches or menu diving
• Audio-conscious analog design
• Optimized internal wiring and grounding strategy
• Carefully selected components
• Robust 4P6T rotary selector
• Clean, dynamic and controlled bass reproduction

PREMIUM vs ECO version

The ECO version features a compact PETG enclosure for portable or flexible setups and prioritizes affordability while preserving the same analog sound philosophy.

The 19" PREMIUM version is designed for fixed Hi-Fi or studio installations and features:

• Custom symmetrical linear AAL power supply
• Improved internal grounding and power distribution
• Rack-ready construction for permanent installations
• Extremely low idle noise
• Enhanced long-term robustness

This first rack unit includes a minor cosmetic imperfection on the rear panel labeling.

A rear-panel labeling issue was carefully corrected using a clean label solution (see product photos).

This does not affect performance, reliability or usability in any way, and the listed price already reflects this cosmetic defect.

Why this price?

Built using carefully selected components and hand assembly practices focused on signal integrity, reliability and long-term durability.

Hand-built in small batches with careful attention to internal wiring, grounding and long-term reliability.

Who did it?

Designed, hand-assembled and individually tested in France by AAL — Analog Audio Lab.

Practical electronics designed to solve real-world problems.

analog.audio.lab@gmail.com