Features & Applications
Features
- 4 × 125 W Class D amplifier
- Low-impedance 4–16 Ω and 70/100 V modes
- Onboard EQ and limiter presets
- Rear-panel preset selection and GPIO control
- Maximum 250 W shared within each channel pair
- Half-width 1U chassis
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Applications
- Restaurants, cafés and bars
- Hotels and hospitality spaces
- Retail and commercial installations
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Detailed Description SmartAmp 20
SmartAmp 20 brings four amplifier channels and loudspeaker DSP into a half-width 1U enclosure. Rear-panel preset switches apply the EQ and limiter settings for supported Optimal Audio loudspeakers. Custom Configurator profiles extend the available configurations where required.
The nominal rating is 4 × 125 W. Each pair of channels shares a maximum of 250 W, which can be allocated unevenly within that pair to suit different speaker loads. The amplifier drives conventional 4–16 Ω loudspeakers as well as 70 V and 100 V distributed systems.
Two compatible SmartAmps can mount side by side in one rack space with the appropriate kit. Audio connections use balanced Euroblock inputs and Euroblock loudspeaker outputs. GPIO supports ZonePad VL1 volume panels, while a Zone controller provides wider system control through WebApp. The universal mains input operates from 100–240 V.
Explore the Optimal Audio range at B-Star. Technical reference: SmartAmp 20 datasheet and the Optimal Audio brochure.
Technical Specifications SmartAmp 20
AMPLIFIER
|
| TYPE |
CLASS D power amplifier with DSP |
| POWER OUTPUT (4Ω-16Ω) |
4 x 125W |
| ANALOGUE IN/LINK |
4 balanced line inputs on Euroblock connectors |
| SIGNAL TO NOISE RATIO |
> 100dB (A-weighted, 20Hz – 20kHz, 8Ω load) |
| FREQUENCY RESPONSE |
20Hz – 20kHz (+0/-0.25 dB (8Ω load, 3dB below rated power) |
| TOTAL HARMONIC DISTORTION |
< 0.05% (20Hz – 20kHz, 8Ω load, 3dB below rated power) |
| SLEW RATE |
8.796V/µS at 70V peak, low impedence, 17.77V/µS at 100V peak, high impedence |
| DAMPING FACTOR |
370 with 8Ω load |
DSP & CONTROL
|
| DIGITAL SIGNAL PROCESSING |
EQ & limiter presets for Optimal Audio loudspeakers |
| CONTROL AND MONITORING |
GPIO |
| DSP SAMPLE RATE |
48kHz |
POWER & COOLING
|
| COOLING |
Forced air cooling with fan |
| MAINS POWER INPUT |
Universal Mains, 100-240V, 50-60Hz |
| MAINS CONNECTOR |
IEC |
| POWER CONSUMPTION |
150W |
| HEAT GENERATED |
540kJ per hour |
CONNECTIONS
|
| ANALOGUE INPUT IMPEDANCE |
10kΩ unbalanced, 20kΩ balanced |
| MAXIMUM ANALOGUE INPUT LEVEL |
+24dBu |
| AMPLIFIER OUTPUTS |
Euroblock |
DIMENSIONS & WEIGHT
|
| DIMENSIONS |
(W) 220mm x (H) 44mm x (D) 353mm |
| WEIGHT |
2.4kg (5.3lbs) |
ACCESSORIES & SYSTEM MATCHING
|
| ACCESSORIES |
Rack ears and connection plate |
| ACCESSORIES (AVAILABLE SEPARATELY) |
Rear rack support kit Wall/desktop mount kit |
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