Sonifex RM-4C8 - Reference Monitor, 4 LED Meter, 8 Channel Inputs, Dual Select

Sonifex RM-4C8

With 4 x bright high-resolution 26 segment meter displays and separate left and right source selectors, the Sonifex RM-4C8 is ideal for monitoring audio channels in an SDI group, or groups of de-embedded AES/EBU channels.

The RM-4C8 offers the same functionality as the RM-2S4 but with an additional source selector so that any of the 4 channels in the selected group, or bank, can be monitored independently on left and right speakers.

Also, 4 meters are provided so that every channel in the selected group, or bank, can be visually monitored and 4 expansion port groups of 4 channels are allowed, so that all audio channels in an SDI signal can be monitored, using the optional RM-HD1 or RM-HDE1 cards.

The audio inputs on the RM-4C8 are auto-sensing, for digital AES/EBU using the left input XLR, or both XLRs for analogue inputs. The inputs can be used in any combination of analogue or digital.

With full remote control via GPI, RS232 or USB, a 5 band parametric equaliser, 6 front panel modifier buttons and the ability to take the optional 3G/HD/SD-SDI expansion cards, the RM-4C8 is a flexible and versatile monitoring solution.

The same high level of care has been taken in the design of the RM-4C8 as in the RM-2S4 to ensure that it will be the best sounding 1U rack-mount audio monitor that you listen to.

Sonifex RM-4C8 Specifications

Inputs

• Audio Inputs: 8 analogue or AES/ EBU digital channels (autoselecting)
• Max level (0dB input gain): +18dBu (analogue)/0dBFS (digital)
• CMRR: >60dB typical
• Input Impedance: 20kΩ (analogue) 110Ω (digital with termination switchable)
• AES/EBU Sample Rate: 32 to 192kHz, converted internally to 48kHz
• Input Gain: 0, +6, +12 or +18dB digital gain (switchable)
• Selection: 2 x Front panel rotary control with indicator LEDs   

Line Level Outputs

• Audio Outputs: 1 x stereo analogue or AES/EBU digital (switchable)
• Gain re Selected Input: Unity or variable, following volume control (switchable)
• Maximum Output Level: +18dBu (analogue)/0dBFS (digital)
• Output Impedance: <50Ω (analogue)/110Ω (digital)
• AES/EBU Sample Rate: 48kHz
• Distortion: <0.02% (1kHz, +8dBu output)
• Noise: -84dB RMS, unity gain ref +8dBu output
• Frequency Response: 20Hz-20kHz +0/-0.5dB
• Crosstalk: Analogue I/O, ref 0dBu 
  
  • 1kHz input:
  • 10kHz input:

Audio Modifiers

• Modifier Selection: Illuminated front panel pushbuttons
• DIM: Reduces speaker audio level by 10dB
• CUT L & CUT R: Mutes left/right speaker audio
• MONO: Combines left and right audio inputs
• PHASE INVERT: Inverts phase of right audio input
• M+S: Converts stereo input to Middle (sum) and Side (difference) signals 

User-Variable Equalisation

• Type: Parametric
• Bands: Five
• Centre Frequency: 200Hz to 18kHz
• Bandwidth: 0.25 to 2 octaves
• Boost/Cut: ±12dB
• Programming: Via USB/serial control port 

Amplifier/Loudspeakers

• Configuration: Three-way with stereo mid/ high-frequency drivers & mono low-frequency driver
• Power Output: 2 x 5W (HF) + 20W (LF) with protective limiter
• Crossover: 500Hz (3rd order Butterworth)
• Distortion (HF Outputs): < 0.05% (1kHz, 3W output)
• Distortion (LF Output): < 0.05% (100Hz, 6W output)
• Noise: More than 80dB below full output
• Volume: Mute to full volume via front panel rotary control
• Balance Trim: ±6dB via front panel rotary control
• Peak Acoustic Level: 102dB SPL @ 2ft

Level Metering

• Number: 4 x 26-segment tri-colour LED bargraphs
• Characteristics:
  
  • Selectable by switch from: 
  • 1. Dual BBC PPM + standard VU 
  • 2. BBC PPM 
  • 3. EBU PPM 
  • 4. Nordic PPM 
  • 5. AES/EBU digital PPM 
  • 6. DIN PPM 
  • 7. Standard VU 
  • 8. Extended VU
• Ballistics: According to selected characteristic
• Line-Up Level: According to selected characteristic 

Phase Metering

• Type: 5-segment, indication at 0, 45, 90, 135 and 180 degrees 

Remote Control

• USB: Slave device, 19200 baud
• Serial: RS232, 19200 baud, 3-wire connection
• Alarm Outputs:
  
  • 1. Audio underlevel/fail (latching) 
  • 2. Audio overlevel (latching) 
  • 3. Sustained phase error (latching) 
  • 4. AES/EBU input unlock (non-latching) Open-collector outputs rated at 30V, 50mA maximum 
  • Output low/conducting in normal condition (no alarm)
• Control Inputs:
  
  • 1. Mute audio 
  • 2. Dim audio 
  • 3. Alarm reset 
  • Pull-to-ground to activate inputs 

Status Indicators

• LIMIT: Indicates loudspeaker protection limiter is active.
• CLIP: Indicates internal digital clipping due to overlevel.
• LOCK: Indicates lock achieved on selected digital input(s).
• OPT: For future use. 

Connectors

• Audio Inputs: 8 x XLR 3-pin female (balanced, may be unbalanced)
• Audio Outputs: 2 x XLR 3-pin male (balanced, may be unbalanced)
• Headphones: 1/4” (6.35mm) A-gauge 3-pole stereo jack socket
• USB: Type B socket
• Serial: D-sub 9-pin female
• Remote I/O: D-sub 15-pin male
• Mains Input: Filtered 3-pin IEC male, continuously rated 85 - 264VAC, 47 - 63Hz, fused, 60W peak, 30W average
• Fuse Rating: Anti-surge fuse 2A 20 x 5mm 

Equipment Type

• RM-4C8: Reference Monitor, 4 LED meters, 8 channel inputs & dual source selectors

Physical Specification

• Dimensions (Raw): 
  
  • 48cm (W) x 30.5cm (D) x 4.4cm (H) (1U) 
  • 19” (W) x 12” (D) x 1.73” (H) (1U)
• Dimensions (Boxed): 
  
  • 57cm (W) x 52cm (D) x15cm (H) 
  • 22.4” (W) x 20.5” (D) x 5.9” (H)
• Weight:
  
  • Nett: 4.5kg Gross: 6kg 
  • Nett: 10lb  Gross: 13.2lb