The Signal Is Only as Strong
as What Drives It.
Mixer and amplifier systems — sized correctly, configured precisely, and racked cleanly — are the signal backbone of every PA installation. Layerix designs, supplies, and installs the complete amplification chain from source to speaker.
What is a mixer, amplifier, and DSP?
A mixer combines multiple audio sources — microphones, music players, paging stations — into a managed signal. An amplifiertakes that signal and drives it to the speakers at the correct power level. A DSP(Digital Signal Processor) sits between them — processing, routing, equalising, and protecting the signal before it reaches the amplifier. Layerix designs the complete signal chain for every PA deployment — not just the speakers on the wall.
Who is it for?
- ✓ New PA system installations requiring a complete signal chain
- ✓ Existing PA systems with amplifier faults or distortion
- ✓ Systems being upgraded from analogue to DSP‑controlled
- ✓ Multi‑zone facilities requiring matrix mixing
- ✓ Facilities adding new zones to an existing amplifier room
The Problems Proper Mixing & Amplification Solve
Under‑powered amplifiers clip and distort
An amplifier running above its rated power clips the audio signal — producing harsh distortion that damages speakers and makes speech unintelligible. An over‑specified amplifier driving low loads wastes cost. Correct sizing eliminates both.
No DSP = No control
Without a DSP between the mixer and amplifiers, a PA system cannot equalise for room acoustics, limit amplifier input to prevent clipping, gate microphone channels to prevent noise, or route different sources to different zones. A DSP transforms a basic speaker system into a managed PA infrastructure.
Poorly racked equipment fails early
Amplifiers generate heat. Stacked without airflow, they overheat and fail. Equipment not mounted on proper rails vibrates loose over time. A correctly designed amplifier rack — with proper ventilation, cable management, and power distribution — extends equipment life significantly.
Scope of Work
The Complete PA Signal Chain
Every element in this chain must be correctly specified and configured. Layerix designs, installs, and commissions the complete chain — not individual components in isolation.
Amplifier Sizing Guide
| Zone Speaker Load (total tap wattage) | Min Amp Rating | Recommended Amp Rating |
|---|---|---|
| 100W | 100W | 150W |
| 200W | 200W | 300W |
| 500W | 500W | 750W |
| 1000W | 1000W | 1500W |
Layerix sizes every amplifier channel at minimum 1.5× the connected speaker load — providing headroom that prevents clipping and extends amplifier life.
DSP vs Analogue Mixer — When do we need a DSP?
Use analogue mixer only:
- Small systems (1–3 zones)
- Fixed routing, no EQ requirement
- Budget‑constrained
Use DSP:
- 4+ zones, zone routing flexibility
- Room EQ required
- Priority logic, fire alarm integration
- Remote monitoring
Recommended for all commercial PA installations.
Our Amplifier & DSP Process
Source Inventory & Zone Load Calc
List all audio sources, calculate total speaker wattage per zone.
Amplifier Sizing & DSP Selection
Size amplifiers (1.5× headroom), select DSP platform based on zones and features.
Rack Design & Procurement
Design rack layout, ventilation, power distribution, order equipment.
Rack Build & Equipment Mounting
Assemble rack, mount amplifiers, DSP, mixers, patch panels.
Wiring — Inputs, Outputs, Power
Terminate all source inputs, speaker outputs, mains power, and control cables.
DSP Configuration & Commissioning
Program routing, EQ, limiting, test signal flow per zone, verify SPL, handover.
Real Amplifier & DSP Deployments
Every photo is from an actual Layerix amplifier rack project — 100% in‑house.
Client Success Story
Challenge: Existing analogue PA system had audible clipping, no zone EQ, and amplifiers overheating in a poorly ventilated rack.
Solution: Replaced analogue mixer with DSP, resized amplifiers (1.5× headroom), redesigned rack with active cooling, programmed EQ per zone.
Outcome: Distortion eliminated, speech intelligibility improved from 0.45 STI to 0.72 STI, rack temperature dropped from 55°C to 38°C, amplifier life extended.