Усилители мощности стерео — Emotiva XPA-7 Gen3

Emotiva's XPA-7 Gen3 offers seven channels of amplification, which the maker suggests for the seven main bed channels in a surround system. It sits on the XPA Gen3 modular platform and is built to order in the chosen configuration, with Emotiva listing it at USD 2,749.

Key specs that matter

All seven positions hold High-Powered Single Channel Modules. With every channel driven, the rating is 200 W RMS per channel into 8 ohm and 320 W into 4 ohm. Two channels driven raise this to 300 W into 8 ohm and 490 W into 4 ohm, and a single channel can deliver 550 W into 4 ohm between 20 Hz and 20 kHz. THD+N measures under 0.005% at 100 W, 1 kHz and 8 ohm. Broadband frequency response runs from 5 Hz to 80 kHz (+0/-2 dB), and power bandwidth at rated output is 20 Hz to 20 kHz within 0.1 dB. The maker quotes signal to noise above 117 dB referenced to rated power, a damping factor over 500 and 29 dB of gain, with 1.71 V needed for full output.

Engineering and use context

Every module follows a discrete Class A/B layout, dual differential and high current, with a short signal path. Power comes from a regulated switch-mode supply with Soft-Switch Optimized Class H operation. Emotiva gives maximum consumption as 2,600 W and notes that this describes continuous test signals at maximum output into a load bank rather than normal programme. The modular build lets the configuration be expanded or changed later. The chassis measures about 432 x 203 x 483 mm including feet and 178 mm tall without them, and weighs about 24 kg out of the box. Protection handles excessive temperature, shorted outputs and ground faults, a rear breaker covers the AC side, and the amplifier carries a five-year warranty.

Pairing

Suitable sources are AV processors, stereo preamps and AV receivers that have preamp outputs. Each channel carries both XLR and RCA sockets, with impedances of 33 kOhm and 23.5 kOhm, and a toggle picks between them. Gold-plated five-way posts take bare wire, lugs or banana plugs. A 12 VDC trigger output and a 5 to 12 V trigger input tie it to other equipment, and each channel is rated for loads down to 4 ohm. Against 1 W, signal to noise exceeds 91 dB. Up front sits a standby button with a colour-changing halo and a blue per-channel LED that switches to red when a fault is detected, and a rear-panel switch dims or disables these indicators. Boxed, the amplifier weighs about 26.3 kg in a 622 x 305 x 629 mm carton.

Alternatives

The Emotiva XPA-11 Gen3 combines three high-powered mono modules with four stereo modules for eleven channels in one chassis.