Tender Specification: MS-HM.02 Audio System for Integration into Media Boards Specially tuned, two-channel “slimline” audio system designed for optimal speech intelligibility during web conferences and flawless reproduction of high quality media sound. The audio system consists of two extremely flat, powerful loudspeaker units, specially developed for media boards, and a separate, compact DSP amplifier unit with suitable pre-programmed user presets and a pre-assembled cable set. The two DSP-controlled, two-way loudspeaker units with bass reflex tuning are each equipped with a 5“ long excursion driver and 1“ dome tweeter with short horn and self-resetting polyswitch for high frequency protection. Able to briefly handle peak power of up to 320 W, the loudspeaker units each generate a maximum SPL of 110 dB. They have a nominal dispersion of 90° x 90° (h x v) with a wide frequency range of 68 Hz to 20 kHz. Both loudspeaker units also have a compact, low resonance birch plywood enclosure, with four M5 screw thread mounting points for brackets and terminal connections top and bottom. The two-channel, DSP-controlled CLASS D amplifier unit has a power output of 100 W / 4 Ohm per channel. It also has specially programmed performance- and speaker-protect presets for each loudspeaker unit. These include frequency response equalization, speech optimization and overall sound optimization aligned with the inner enclosure volume of the media board. The convection-cooled amplifier unit has a 9.5” wide, 1U metal enclosure. Rear panel connections: two balanced line inputs with plug-in Phoenix terminals and an input impedance of 20 kOhm, two unbalanced RCA line inputs with an input impedance of 10 kOhm, two loudspeaker outputs (Phoenix terminals), a 4-pin Phoenix terminal for connecting an optional potentiometer for volume control. Technical Data (per Loudspeaker Unit) Electroacoustic Features Acoustic design: compact passive loudspeaker, 2-way, vented Components: 5“ / 1“ dome tweeter with short horn and self resetting IPC[*] high frequency protection Power rating (nominal) [1]: 80 W Power rating (programme) [2]: 160 W Power rating (peak) [3]: 320 W Sound pressure: 87 dB Maximum sound pressure [3]: 110 dB Frequency range [4]: 68 Hz – 20 kHz Nominal dispersion (h x v) [5]: 90° x 90° Nominal impedance: 8 Ohm General Features Enclosure: Birch plywood Front design: open, behind cover panel Mounting points: 4 x M5 threaded inserts with mounting brackets Connections: 2 x loudspeaker connection terminals with spring-loaded terminal connection Standard colours: textured paint, black Dimensions (W x H x D): 328 x 163 x 99.5 mm Weight [6]: 3.3 kg Optional Features Special colours: all RAL Classic colours, other colour catalogues possible on request [1] According to IEC-60268-5 long term [2] According to IEC-60268-5 short term [3] Peak, 20 ms with bandpass filtered pink noise signal according to IEC 60268-2, at one octave above the lower limit of the frequency range. [4] -10 dB under anechoic half space conditions with speaker preset [5] Horizontal x vertical at -6 dB [6] Net weight without other components [*]Intelligent Protection Circuit: Voltage-controlled semiconductor circuit, which, with an extremely short response time, effectively protects the high frequency driver against overload Technical Data (DSP amplifier unit) Output power: 2 x 50 W / 8 Ohm, 2 x 100 W / 4 Ohm Factory settings: 2 channels at 4 Ohm, volume control enabled on front panel, loaded presets for media board application THD: 0.2 % nominal power output Frequency range: -3 dB 20 Hz – 20 kHz DSP Functions: Input- and output level, Limiter, 5-band parametric Equalizer per channel, high- and low-pass filters with adjustable cut-off frequency und selectable slew rate, Delay (up to 60 ms per channel), I/O routing Interface: Ethernet, web-based application (no additional software required for remote monitoring or control Audio switching (APD): Threshold for change to operating mode: 5 mV, Change to Standby mode after 30 min with no input signal Volume control: Front panel (removable control buttons and safety cover), Interface (PC, iOS, Android, password protection), individual/simultaneous remote control per channel with 10 kOhm potentiometers Protection circuits: Overheating, short circuit, overload Signal/Noise ratio: -100 dB under nominal output power (rated sound pressure level) Inputs: 2 balanced line inputs (Phoenix terminal type 3.5 mm, plug-in), 2 unbalanced line inputs (RCA) Input sensitivity: balanced – 750 mV, unbalanced – 750 mV Input impedance: balanced: 20 kOhm, unbalanced: 10 kOhm Outputs: 2 loudspeaker outputs (Phoenix terminal type 5.08 mm, plug-in) Power supply: 100 – 240 VAC, 50/60 Hz Power consumption: Standby mode (Ethernet active): 1 W, 22 mA, 3.14 BTU, active waiting state: 12.5 W, 173 mA, 41 BTU, average power: 4 Ohm (audio signal, 1/3 power), 116 W, 395 BTU, maximum power: 4 Ohm (audio signal, peak), 384 W, 4.9 A, 1310 BTU Cooling: convection cooled (without fans) Dimensions (W x H x D): 216 x 45 x 343 mm (1U, 9.5“) Weight: 2.2 kg Optional accessories: rack mounting kit Controls: Channel 1 volume, Channel 2 volume, Power on/off button Displays Power (LED): blue (lit = ON, flashing = Standby) Clip CH1 & CH2 (LED): red Signal CH1 & CH 2 (LED): green Manufacturer: Fohhn Audio AG Model: MS-HM.02 Contents: 2 x MT-05.02 + 1 x MA-2.100 + 1 x cable set