Tesira AMP-4175R

A four-channel amplifier built for Tesira audio networks

The Tesira AMP-4175R is a 2RU rack-mounted amplifier that drives loudspeakers across four channels, each rated at 175 W. It connects to the Tesira network through two RJ-45 ports, primary and secondary, which accept CAT-5 or higher cabling and use AVB/TSN audio networking. Configuration is carried out in Tesira software. The front panel carries an OLED display with capacitive touch navigation, so individual channel mutes and levels, as well as chassis-wide settings, can be checked and adjusted at the unit.

Specifications that matter when specifying the unit

• Output: 175 W per channel into 4 ohm or 8 ohm loads, rising to 350 W when channels are bridged into 8 ohm.
• Minimum load: 2 ohm minimum operational load.
• Audio quality: frequency response within 1 dB from 20 Hz to 20 kHz, dynamic range above 100 dB, and THD+N below 0.3% at rated power.
• Power: 100 to 240 VAC at 50/60 Hz, with current draw between 5.5 A and 2.3 A across the rated supply range.
• Size and weight: 19 inches wide, 3.5 inches high, 17.4 inches deep, weighing 20.6 lb (9.3 kg).
• Expansion: an optional I/O expander card slot, optional analog failover, and optional Tesira EX-MOD cards EIC-4, EIOC-4 and EOC-4.
• Compliance: CE marked, UL and C-UL listed, RoHS compliant and FCC Part 15B, evaluated to UL 2043 for use in air handling spaces.

Where it fits in Qatar

A government ministry meeting room in West Bay, Doha, that runs several rooms on one Tesira network could use this amplifier to drive loudspeaker zones while keeping every room's levels managed in the same software. Where a room needs a fallback audio path, the optional analog failover can be specified at ordering.

A lecture theatre in Education City could place the unit in an AV cabinet and assign its four channels to separate zones across the room. Bridgeable channels give the designer a 350 W option into 8 ohm when a particular zone needs more output.

Planning for Qatar heat, rack space and power

The rated ambient operating range is 0 to 40 degrees Celsius, with humidity from 0 to 95 percent non-condensing. Summer temperatures in Qatar regularly exceed 45 degrees Celsius, so the amplifier belongs in an air-conditioned comms room or a ventilated cabinet, not in an unventilated ceiling void or a hot plant space. Confirm the installation environment with the SmartRooms Qatar team during a free site survey. Reserve 2RU in a 19-inch rack, allow clear space for the variable speed fan, and plan for a two-person lift at 20.6 lb (9.3 kg). The 100 to 240 VAC rating covers Qatar's 240 V, 50 Hz supply.

Discontinued model: request a quote for a current replacement

Biamp has discontinued the AMP-4175R, and the manufacturer names the Voltera D 1200.4 amplifier as its successor. If your organisation already runs this model, send us your channel count, rack layout and network details. Our team will check whether the successor or another compatible model fits your existing wiring before you order. Government bodies can order by LPO or through Monaqasat tenders, and payment is by bank transfer, cheque or purchase order. Request a quote and we will confirm lead times with the quotation.