HALO-4B300 is a 4-channel Class D amplifier with networked DSP, delivering 4 × 300 W in low-impedance mode at 4 Ω or 8 Ω. Its four output channels can be bridged to drive high-impedance 70 V or 100 V loudspeaker lines. It features 4 balanced analogue inputs, 4 Dante®/AES67 digital inputs and outputs, 2 balanced auxiliary outputs, and a flexible 4 × 6 digital matrix.

Its comprehensive DSP includes input and output parametric equalization, graphic output equalization, crossovers, delay, and configurable peak and RMS limiters. The built-in web application provides intuitive configuration, control and monitoring of the amplifier. Two Ethernet ports with integrated switch functionality allow network daisy-chaining and provide access to control, Dante®/AES67 audio transport and remote management.

HALO-4B300 also supports customizable user control panels and integration with EclerCLOUD and the PULSO digital control panel series.

Channels

• Number of output channels: 4
• Output connection type: 2-pin Euroblock, pitch: 7.62 mm
• Output configuration: 4 Lo-Z connections, bridgeable for Hi-Z
• Number of input channels: 4
• Input connection type: 3-pin Euroblock, balanced, pitch: 3.5 mm
• Number of digital inputs: 4
• Input configuration: Digital matrix 4 in x 6 out

Auxiliary Outputs

• Number of auxiliary outputs: 2
• Auxiliary output connection type: 3-pin Euroblock, balanced, pitch: 3.5 mm

Digital Outputs

• Number of digital outputs: 4
• Digital output connection type: Ethernet, managed via Dante®/AES67 Controller

Output Power - All Channels Driven @ 1kHz @ CF9dB @ 1% THD

• Max. output power @ 8 Ω: 300 W
• Max. output power @ 4 Ω: 300 W
• Max. output power @ 8 Ω bridge mode: 600 W
• Max. output power @ 100 V bridge mode: 550 W
• Max. output power @ 70 V bridge mode: 600 W

Output Power - Single Channel Driven @ 1kHz @ CF9dB @ 1% THD

• Max. output power @ 8 Ω: 300 W
• Max. output power @ 4 Ω: 300 W
• Max. output power @ 8 Ω bridge mode: 600 W
• Max. output power @ 100 V bridge mode: 550 W
• Max. output power @ 70 V bridge mode: 600 W

Output Power - All Channels Driven @ 1% THD

• Max. output power @ 8 Ω: 300 W
• Max. output power @ 4 Ω: 300 W
• Max. output power @ 8 Ω bridge mode: 600 W
• Max. output power @ 100 V bridge mode: 550 W
• Max. output power @ 70 V bridge mode: 600 W

Output Power - Single Channel Driven

• Max. output power @ 8 Ω: 300 W
• Max. output power @ 4 Ω: 300 W
• Max. output power @ 8 Ω bridge mode: 600 W
• Max. output power @ 100 V bridge mode: 550 W
• Max. output power @ 70 V bridge mode: 600 W

Signal

• Voltage gain: 28 to 40 dBV / 30.2 to 42.2 dBu
• Input sensitivity: 0 dBV to +12 dBV
• Input impedance: >5 kΩ Single Ended / >10 kΩ Differential Pair
• Max. input level: +18 dBV / +20.2 dBu
• Frequency response: 20 Hz - 25 kHz
• THD + Noise: <0.1%, 0.03 typical @ 1 kHz, from 0.1 W to full power
• SNR: >85 dB
• Crosstalk: >80 dB
• CMRR: >65 dB typical
• Damping factor: >500 @ 8 Ω, from 20 Hz to 1 kHz

Electrical

• Power supply: Universal, regulated SMPS with PFC
• AC mains requirement: 100-240 V @ 50-60 Hz (±10%)
• Power factor correction: >0.8 (Total Output Power >300 W)
• AC mains connector: IEC C14 inlet

Power Consumption

• Power consumption, 1/8 power @ 4 Ω all channels driven: 224 W / 314 VA
• Power consumption, idle: 32 W / 76 VA
• Power consumption, standby/sleep: 12 W / 32 VA

Power & Heat @ 230VAC - 1/4 Power, @ 4 Ω (All Channels Driven)

• Power: 405 W / 506 VA
• Current draw: 2.3 Arms
• Thermal loss: 358 BTU/h / 90 kcal/h

Power & Heat @ 230VAC - 1/8 Power, @ 4 Ω (All Channels Driven)

• Power: 224 W / 314 VA
• Current draw: 1.4 Arms
• Thermal loss: 252 BTU/h / 63 kcal/h

Power & Heat @ 230VAC - Idle

• Power: 32 W / 76 VA
• Current draw: 0.33 Arms
• Thermal loss: 109 BTU/h / 28 kcal/h

Power & Heat @ 230VAC - Standby/Sleep Mode

• Power: 12 W / 32 VA
• Current draw: 0.14 Arms
• Thermal loss: 41 BTU/h / 10 kcal/h

Power & Heat @ 120VAC - 1/4 Power, @ 4 Ω (All Channels Driven)

• Power: 407 W / 440 VA
• Current draw: 3.6 Arms
• Thermal loss: 365 BTU/h / 92 kcal/h

Power & Heat @ 120VAC - 1/8 Power, @ 4 Ω (All Channels Driven)

• Power: 225 W / 252 VA
• Current draw: 2.1 Arms
• Thermal loss: 256 BTU/h / 65 kcal/h

Power & Heat @ 120VAC - Idle

• Power: 30 W / 58 VA
• Current draw: 0.5 Arms
• Thermal loss: 102 BTU/h / 26 kcal/h

Power & Heat @ 120VAC - Standby/Sleep Mode

• Power: 12 W / 24 VA
• Current draw: 0.2 Arms
• Thermal loss: 41 BTU/h / 10 kcal/h

Technologies

• Amplification technology: Class D
• Energy saving: Auto standby function programmable per channel; Sleep Mode function selectable
• Efficiency: 74% (1/4 power, @ 4 Ω, 230VAC in)
• Cooling: Fan
• Maximum fan noise: 49 dBA (maximum acoustical noise @ 1 m)

DSP

• AD converters: 32 bit @ 48 kHz - AKM; 111 dB dynamic range, -103 dB THD+N
• DA converters: 32 bit @ 48 kHz - AKM; 115 dB dynamic range, -107 dB THD+N
• Sample rate converter: 48 kHz
• Internal precision: 32 / 64 bit floating point
• Latency: 5.6 ms
• Memory/Presets: 20 presets
• Delay: Up to 1 s at outputs
• Equalizer: Graphic EQ - 8 bands at outputs; Parametric EQ - 12 bands both inputs and outputs
• Crossover: With Parametric EQ
• Limiters: Output Peak and RMS Limiter, configurable by user
• Inputs processing: PEQ
• Outputs processing: PEQ, GEQ, Delay, Limiters

Protections

• DC protection: Yes
• HF protection: Yes
• Short-circuit protection: Yes
• Clip limiter: Yes
• Long term limiter: Yes
• Thermal protection: Yes

Remote Control Connections

• ON / OFF: No
• GPIs: x4 GPIs (0-12 V)
• External MUTE: Yes, contact

Local Control

• Attenuators: Programmable front panel knobs
• Output mode settings: Output mode selection per channel in Lo-Z modes: 4 Ω, 8 Ω. Output mode selection per pair of channels in Hi-Z modes (bridge): 100 V, 70 V, 8 Ω BR
• RUN/SLEEP mode: Yes, front panel push-button
• Power ON/OFF: Yes, back panel switch

Settings

• Filters: 20/35/50/70 Hz high pass filter selectable per output; fixed 15 Hz 3rd order Butterworth
• Output settings: Lo-Z 4 Ω / 8 Ω configurable each channel; Hi-Z 8 Ω / 70 V / 100 V configurable bridged pair
• Gain: 28 to 40 dBV / 30.2 to 42.2 dBu
• Auto standby function: Yes, configurable by user
• Auto standby threshold: -30 dB to -80 dB in -10 dB steps
• Auto standby time: 30 s to 1 h, configurable via steps
• Power ON/OFF: Yes, front panel switch

Connectivity

• Ethernet: Ethernet Base-Tx 10/100/1000 Mb Auto X-Over; 2 ports Ethernet Switch capability
• Dante® protocol: Dante®/AES67 4 x Tx / 4 x Rx channels (2/2 flows)
• Programming and control: Embedded web application

Monitoring

• Signal present: SP/CLIP LED (Green - Orange - Red) per channel
• Clipping: SP/CLIP LED (Green - Orange - Red) per channel
• Protect: PROT LED (Red) per channel
• Standby / Mute: MUTE / STBY LED (Red, Orange) per channel
• Thermal: THERMAL LED (Orange) per channel
• Dante: DANTE LED (Green / Red) per unit
• Data: DATA LED (White) per unit
• On: ON LED (Green) per unit

Digital Engine

• Processor: Quad core 64 bits 1.5 GHz

Audio Converters

• Sampling rate: 48 kHz
• Resolution: 24 bit
• Dynamic range: 111 dB

Real-Time Clock

• Retention time: 30 days
• Accuracy: 1 minute/month

Local Storage

• MicroSD: SDXC
• Capacity: Up to 2 TB
• File system: FAT16, FAT32, VFAT (read/write); NTFS (read); multi-partition up to 1
• Playable audio files: MP3, OGG, WAV, FLAC, AIFF
• Files analysis: 65354 playable folders; 65354 playable folders within each folder; 65354 playable files within each folder
• Folder hierarchy: Up to 8 containing the root directory
• Sorting: UNICODE, in alphabetical order; up to 100 folders/files by folder; folders/files over 100 sorted in the FAT order

Physical

• Operating temperature: 0 °C to 50 °C / 32 °F to 122 °F; performance may be reduced above 40 °C / 104 °F
• Operating humidity: 5-85% RH, non-condensing
• Storage temperature: -10 °C to 50 °C / 14 °F to 122 °F
• Storage humidity: 5-85% RH, non-condensing
• Installation options: Rack 19" installation & desktop
• Included accessories: Schuko AC cable, Euroblock connectors (inputs/outputs), desktop feet, rack 19" installation hardware
• Optional accessories: Compatible with Ecler PULSO Series
• Dimensions: Handles incl.: 482.5 x 44 x 405.6 mm / 19 x 1.73 x 15.97 in. (W x H x D); handles excl.: 482.5 x 44 x 372 mm / 19 x 1.73 x 14.65 in. (W x H x D)
• Weight: 5.8 kg / 12.79 lb
• Shipping dimensions: 583 x 75 x 580 mm / 22.95 x 2.95 x 22.83 in. (W x H x D)
• Shipping weight: 8.30 kg / 18.30 lb