SmartAmp 20
4 x 125W amplifier with integral DSP
Features
- Desktop or rack mounted
- Signal processing presets for Optimal Audio loudspeakers
- 125 watts per channel into 4Ω-16Ω and 70V-100V line loudspeaker loads
- Power sharing technology enables 250 watts from two pairs of channels
Bars/Restaurants & Cafes
Retail
Wedding Venues
Hotels
Education Facilities
Houses of Worship
Corporate Offices
Museums
Fitness Studios
Residential
SmartAmp 20 is an amplifier with built in Digital Signal Processing (DSP) specifically tailored to optimise the performance of the Optimal Audio loudspeaker range.
This four-channel power amplifier can drive either conventional low impedance or 70V – 100V loudspeaker loads. Internal DSP presets of Optimal Audio loudspeakers are selected by switches to the rear of the amplifier, which enable the appropriate EQ and overload protection settings.
The space efficient half-width, 1U, 19” rack housing enables two units to be mounted side by side with a SmartAmp 10 or another SmartAmp 20, allowing up to 8 channels in a 1U space.
The SmartAmp 20 is capable of a maximum of 250W output shared between each pair of channels. This enables SmartAmp 20 to flexibly deliver power required for each channel within a pair, depending on the system requirement. For example, if one channel was to only be using 20W of power for some Up speakers, the other channel in the pair could deliver the remaining 230W of power for a more demanding application.
Power factor Correction power supply technology enables universal AC mains operation, eliminating the need for local market specific power regulation and potential reliability issues. The power supply delivers consistent, regulated power worldwide with ultra low standby power consumption for EuP2103 and energy star compliance.
| TYPE | CLASS D power amplifier with DSP |
| POWER OUTPUT (4Ω -16Ω) | 4 x 125W |
| 70V-100V OUTPUT | 4 x 125W |
| DIGITAL SIGNAL PROCESSING | EQ & limiter presets for Optimal Audio loudspeakers |
| COOLING | Forced air cooling with fan |
| ANALOGUE IN/LINK | 4 balanced line inputs on Euroblock connectors |
| ANALOGUE INPUT IMPEDANCE | 10kΩ unbalanced, 20kΩ balanced |
| MAXIMUM ANALOGUE INPUT LEVEL | +24dBu |
| AMPLIFIER OUTPUTS | Euroblock |
| SIGNAL TO NOISE RATIO | > 100 dB (A-weighted, 20 Hz – 20 kHz, 8 Ω load) |
| FREQUENCY RESPONSE | 20 Hz – 20 kHz (+0/-0.25 dB (8 Ω load, 3 dB below rated power) |
| TOTAL HARMONIC DISTORTION | < 0.05 % (20 Hz – 20 kHz, 8 Ω load, 3 dB below rated power) |
| SLEW RATE | 8.796V/µS at 70 V peak, low impedence, 17.77V/µS at 100 V peak, high impedence |
| DAMPING FACTOR | 370 with 8Ω load |
| CONTROL AND MONITORING | GPIO |
| DSP SAMPLE RATE | 48kHz |
| MAINS POWER INPUT | Universal Mains, 100-240V, 50-60Hz |
| MAINS CONNECTOR | IEC |
| POWER CONSUMPTION | 150W |
| HEAT GENERATED | 540 kJ per hour |
| DIMENSIONS | (W) 220mm x (H) 44mm x (D) 353mm (W) 8.67” x (H) 1.73” x (D) 13.90” |
| WEIGHT | 2.4kg (5.3lbs) |
Optimal Audio SmartAmp 20 Amplifier FAQs
The SmartAmp 20 offers a powerful and versatile solution for commercial audio applications. Here are some highlights:
- Increased Power Output: Delivers 4 x 125 watts per channel (at 4Ω-16Ω impedance) compared to the SmartAmp 10. This allows you to drive more demanding speaker setups or larger spaces with higher sound pressure requirements.
- Power Sharing Technology: The SmartAmp 20 intelligently distributes power between channels. If one channel requires less power for a specific speaker, the remaining power can be allocated to another channel for a more demanding speaker, maximizing overall efficiency.
- Enhanced DSP Capabilities: Features built-in DSP with Optimal Audio speaker presets for simplified setup and optimal performance.
- Flexible Speaker Connection Options: Supports both low-impedance (4Ω-16Ω) and high-impedance (70V or 100V) speaker connections, offering wider compatibility for distributed speaker systems commonly used in commercial settings.
- Compact and Space-Saving Design: Maintains the half-width 1U rackmount design for space-efficient installations. You can install two units side-by-side in a single 1U rack space for multi-channel systems alongside other compatible SmartAmp models.
Due to its increased power and features, the SmartAmp 20 is ideal for various commercial audio applications, including:
- Larger retail stores: Background music for extensive areas.
Warehouses and factories: Background music for employee areas with moderate to high ambient noise. - Transportation hubs: Background music and announcements in stations or terminals (considering ambient noise levels).
- Large open-plan offices: Background music and clear announcements in workspaces.
- Live music venues or performance spaces: Powering Cuboid speakers for specific zones or applications requiring high fidelity sound reinforcement.
The SmartAmp 20 is a versatile amplifier designed to power a wide range of Optimal Audio speakers, including:
- Ceiling speakers: Up 3, Up 4, Up 6 (multiple speakers possible depending on impedance)
- On-wall speakers: Cuboid 3, Cuboid 5, Cuboid 6, and Cuboid 8 (depending on speaker impedance and total power requirements)
- Subwoofers: Can be used to power the Sub 10 subwoofer. While not explicitly stated, it might also be suitable for other passive subwoofers with compatible impedance ratings.
Here’s a table summarising the key differences between the three SmartAmp models to help you choose the best one:
Feature | SmartAmp 10 | SmartAmp 20 | SmartAmp 30 |
Power output (per ch.) | 2x 125 watts @ 4Ω-16Ω | 4x 125 watts @ 4Ω-16Ω | 4x 250 watts @ 4Ω-16Ω |
Total Power Output | 250 watts | 500 watts | 1000 watts |
Power Sharing | Yes | Yes | No |
Built-in DSP | Presets | Presets | Presets |
Speaker compatibility | Wide range (low & high impedance) | Wide range (low & high impedance) | Wide range (low & high impedance) |
Design | Half-width 1U rackmount | Half-width 1U rackmount | 1U rackmount |
Inputs | Balanced Euroblock/ Phoenix | Balanced Euroblock/ Phoenix | Balanced Euroblock/ Phoenix |
