Excellence in Broadcast

Ward Beck preMO-221

The PreMo-221, a dual microphone preamplifier and stereo headset driver like no other, is a real conversation piece. It is both AES67 and SMPTE2110-30 compliant. Communicating with AES67 / Ravenna / ST2110 protocols, the PreMo-221 connects performance to producers, voices to ears, talent to task and audio with networks. Power Over Ethernet plus redundant local supply ensures broadcast reliability. Remote control via AES70 allows level adjustment, filter insertion, phantom powering, local mixing and more. Once digitized and packetized, the microphone signals are ready to be distributed on modern production AES67 / Ravenna / ST2110 networks. Audio signals on the network can be received and listened to through an exceptional headset driver.

As the name suggests, the PreMo-221 has two mics to network input, one headset output, one pair of line level outputs, and volume control. Combining these features with its networking capabilities, it is a one-stop shop for decentralized radio production. The PreMo-221 is perfect for talk show radio, reporters on the go, live-casting, live sports commentary from the stadium, and many other such applications.

Features

• AES67 and SMPTE2110-30 compliant
• PoE capability
• 2 networked mic inputs
• One headset output
• One pair of Line level outputs
• Volume controls
• Information display screen

GENERAL
• Power supply: 14.5W Max., +12VDC/1.5A adaptor or POE
• Operation temperature: 0˚C to 40˚C
• Physical size: 1.73” H x 5.80” W x 7.72” D
• Weight: 1.95 lbs

USER CONTROLS
• Local full-colour LCD with 5 navigation buttons and 1 mute button
• Remote audio network controller (AES70)

INPUTS/OUTPUTS
• Audio Inputs: 2-ch MIC balanced inputs, XLR female, 2-ch line balanced inputs, ¼” TRS audio jack, 2-ch digital inputs from AES67 network, RJ45
• Audio Outputs: 2-ch 3.5mm jack headphone output, 2-ch digital outputs to AES67 network, RJ45, 2-ch balanced analogue line output, terminal blocks (preMO-221)

MIC/LINE INPUT SPECIFICATIONS
• MIC Phantom power: +48V
• MIC input PAD: -20dB
• Max. MIC input level: +21dBu with PAD off, +41dBu with PAD on
• MIC input gain range: -14.4dB, -6.4dB to +68.6dB in 1dB step
• MIC input impedance: 2.1kΩ (PAD on)
• Max. line input level: +34.6dBu
• Line input gain range: -8dB, 0dB to +56dB in 1dB step
• Line input impedance: 11.5kΩ
• A/D resolution: 24 bits
• Sampling frequency: 44.1kHz, 48kHz, 96kHz
• A/D THD+N: 0.00089%(-101dB), (997Hz, @-1dBFS)
• A/D dynamic range: 118dB (A-weighted, 20Hz – 20kHz)
• Frequency response: ±0.1dB (20Hz – 20kHz, @-1dBFS)

DSP PROCESSING
• High pass filter: 120Hz, 12dB/octave roll-off, 18dB/octave roll-off
• Input gain/master gain: -12dB to +12dB in 1dB step
• Bass tone control: cut-off frequency 350Hz, gain = -12dB to +12dB
• Treble tone control: cut-off frequency 3.5kHz, gain = -12dB to +12dB
• Audio meter: PPM (IEC10268-10, IEC10268-18)

HEADPHONE AMPLIFIER OUTUT SPECIFICATIONS
• Class: AB
• Stereo load power (32Ω, @-20dBFS): 100mW
• THD+N: 0.00087%(-101dB), (997Hz, @-10dBFS)
• Dynamic range: -115dB (A-weighted, 22Hz – 22kHz)

BALANCED LINE OUTPUT SPECIFICATIONS (PREMO-221)
• D/A resolution: 24 bits
• Sampling frequency: 44.1kHz, 48kHz, 96kHz
• D/A THD+N: 0.00054%(-105dB), (997Hz, @0dBFS)
• D/A dynamic range: 118.5dB (A-weighted, 22Hz – 22kHz)
• Frequency response: +0.1/-0.4dB, 20Hz – 20kHz
• Output impedance: 100Ω balanced
• Alignment (SMPTE RP155): -20dBFS = +4dBu
• Max. balanced line output level: +27dBu

NETWORK
• AOIP: AES67
• Minimum audio packet latency: 1.0ms
• Ethernet: 100Base-T
• POE: IEEE802.3af compliant