Optimal Audio 4 x 125W amplifier with integral DSP

Optimal Audio 4 x 125W amplifier with integral DSP

Shipping calculated at checkout.
$2,690.00
$2,596.59
Save 3%
In stock. Shipped within 1-3 days.
  • check Trusted New Zealand audio supplier
  • check Fast nationwide shipping
  • check Expert advice & installation support available

100% Secure Checkout

Guaranteed Secure

  • American Express
  • Apple Pay
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Union Pay
  • Visa

DESCRIPTION

−

The Optimal Audio SmartAmp 20 is a versatile 4-channel amplifier delivering 4 x 125W of reliable, high-fidelity power in a compact half-rack width, 1U chassis. Engineered for commercial installations, it combines efficient Class-D amplification with comprehensive onboard DSP, eliminating the need for external processing and simplifying system architecture.

Each channel features flexible output configuration supporting both low-impedance and 70V/100V constant voltage operation, making it ideal for distributed audio systems in retail, hospitality, corporate, and entertainment venues. Bridged mode operation delivers 2 x 250W for applications requiring greater headroom.

  • 4 x 125W Class-D amplification (2 x 250W bridged)
  • Integral DSP with EQ, delay, crossover, and limiting per channel
  • Low-impedance and 70V/100V line output capability
  • Browser-based control via the Optimal Audio WebApp
  • Pre-loaded speaker presets for seamless loudspeaker pairing
  • Compact half-rack, 1U form factor
  • Energy-efficient design with convection cooling for silent operation
  • Balanced analog inputs with GPIO for preset recall

Controllable over a standard network through the intuitive Optimal Audio WebApp, the SmartAmp 20 enables integrators and installers to configure, monitor, and manage systems remotely with ease. Purpose-built speaker presets ensure optimised performance with Optimal Audio loudspeakers, reducing commissioning time and delivering consistent, professional results across every zone.

SHIPPING INFO

+
We ship nationwide across New Zealand. Most orders are dispatched within 1–2 business days. For large commercial equipment or installation orders, shipping times may vary. Contact us if you need urgent delivery.

RETURNS & WARRANTY

+
All products are covered by manufacturer warranty. If you receive a faulty item, please contact us and we will arrange repair, replacement or refund in accordance with NZ consumer law.

Frequently Asked Questions

Everything you need to know about our products, ordering and services.

Do you offer installation services?
Yes — we provide professional installation for venues, commercial spaces and custom audio setups. Contact us for a tailored quote.
Do you offer equipment hire?
Yes, we offer hire options for events, functions and temporary setups. Get in touch to discuss your requirements.
What equipment do you recommend for my setup?
It depends on your space and use. Whether you're a DJ, venue or event organiser, we can recommend the right gear for your needs.
Are your products suitable for commercial use?
Absolutely. Our range includes professional-grade equipment designed for venues, events, gyms, bars and permanent installs.
Do you supply complete audio and lighting packages?
Yes — we can supply full packages including speakers, mixers, microphones and lighting for a complete setup.
How long does shipping take in New Zealand?
Delivery times vary depending on the product and location, but most orders are dispatched quickly from within NZ.
Do your products come with warranty?
Yes, all products come with manufacturer warranties. Details vary by brand and product.