RM-4C8
Reference Monitor, 4 LED Meters, 8 Channel Inputs & Dual Source Selectors
The RM-4C8 is ideal for monitoring audio channels in an SDI group, or groups of de-embedded AES/EBU channels.
RM-4C8
Reference Monitor, 4 LED Meters, 8 Channel Inputs & Dual Source Selectors
With 4 x bright high-resolution 26 segment meter displays and separate left and right source selectors, the 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 card.
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. This product has settings that can be adjusted using the Sonifex SCi (Serial Control Interface) software.
Product Features
2 x banks of four stereo analogue/digital auto-sensing inputs as standard.
Optional input expansion cards available.
Option for HD/SD-SDI de-embedding.
Stereo analogue / digital output follows source selection.
Independent L/R output source selection.
Selected 4-channel source metering with selectable scales / responses.
Phase meters for correlation / phase error indication.
Audio status alarm outputs.
Bank of push-button audio modifiers.
5 band parametric EQ
3-way speakers with Class D amplification and DSP crossover.
Headphones output.
RS232 / USB control and configuration - Sonifex SCi software.
Typical Applications
Product Category
Analogue & Digital Reference MonitorsTECHNICAL 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: | <-90dB |
| 10kHz input: | <-85dB |
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: |
| Characteristics: | 1. Dual BBC PPM + standard VU |
| Characteristics: | 2. BBC PPM |
| Characteristics: | 3. EBU PPM |
| Characteristics: | 4. Nordic PPM |
| Characteristics: | 5. AES/EBU digital PPM |
| Characteristics: | 6. DIN PPM |
| Characteristics: | 7. Standard VU |
| Characteristics: | 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) |
| Alarm Outputs: | 2. Audio overlevel (latching) |
| Alarm Outputs: | 3. Sustained phase error (latching) |
| Alarm Outputs: | 4. AES/EBU input unlock (non-latching) Open-collector outputs rated at 30V, 50mA maximum |
| Alarm Outputs: | Output low/conducting in normal condition (no alarm) |
| Control Inputs: | 1. Mute audio |
| Control Inputs: | 2. Dim audio |
| Control Inputs: | 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) |
| Dimensions (Raw): | 19” (W) x 12” (D) x 1.73” (H) (1U) |
| Dimensions (Boxed): | 57cm (W) x 52cm (D) x15cm (H) |
| Dimensions (Boxed): | 22.4” (W) x 20.5” (D) x 5.9” (H) |
| Weight: | Nett: 4.5kg Gross: 6.0kg |
| Weight: | Nett: 10.0lb Gross: 13.2lb |
Options | |
| RM-HD1: | 3G/HD/SD-SDI expansion card |
| RM-HDE1: | 3G/HD/SD-SDI & Dolby® E expansion card |
SUPPORT
| RM-4C8 Handbook | [Download] |
Brochures
| Click to visit the brochures page. |
Declarations
| Click to visit the declarations page. |
| For units before serial number 005951 | Version | 3.19 | Date | 11/05/2021 | [Download] | |
| For units from serial number 005951 | Version | 4.03 | Date | 14/08/2023 | [Download] | |
| SCi 2 Software Control Interface (install as an administrator) | Version | 2.0.12 | Date | 8/12/2015 | [Download] |
| Release notes for units before serial number 005951 | [Download] | |
| Release notes for units from serial number 005951 onwards | [Download] |
