XPA U 358 – Eight Channel Low and High Impedance Amplifiers
Eight Channel Low and High Impedance Amplifiers
35 Watts Per Channel
Key Features
- 35 watts rms output power per channel at 8 ohms, 4 ohms, or 70/100V
- ENERGY STAR® qualified amplifier
- Auto standby saves energy
- InstaWake™ exits auto-standby mode in under 100 milliseconds
- Convection cooled, fanless operation – can be stacked without extra rack space for ventilation
- Eight channels in a 1U, half rack width enclosure – rack mount hardware included
| Specification | Value / Description |
|---|---|
| Power Output (each channel) | 35 W RMS into 8 Ω or 4 Ω; or 35 W into 70 V / 100 V (depending on variant) |
| Channels | 8 independent channels |
| Idle Power | ≈ 8.8 W |
| Standby Power | < 1 W (typically ~0.6 W) |
| Power Draw at 1/8 Load (All Channels) | ≈ 65.6 W (efficiency ~67%) |
| SNR / THD+N | ~100 dB SNR; THD+N ≤ 0.1% |
| Damping Factor | >100 @ 8 Ω (and respective HV loads) |
| Cooling / Enclosure | Fanless convection; half-rack 1U; plenum rated with adapter |
| Control Interface | Captive-screw contact closure port for standby/mute; rear recessed gain knobs |
| Certifications | ENERGY STAR®, UL, CE, RoHS, FCC Class B; UL 2043 plenum-rated |
| Dimensions / Weight | Approx. half-rack 1U (~1.1 kg) |
| Protection Features | Clip limiter, over-temp, over-current/DC, and short-circuit protection |
The Extron XPA U 358 is a high-density, eight-channel amplifier housed in a compact 1U half-rack, convection-cooled, fanless chassis. Each channel delivers 35 W RMS into 8 Ω or 4 Ω, and the high-voltage variants (XPA U 358‑70V and 358‑100V) provide 35 W per channel into 70 V or 100 V speaker lines. The unit is ENERGY STAR® certified, offering ultra-efficient Class D amplification with CDRS™ (Class D Ripple Suppression), power factor correction, and minimal inrush current for simultaneous power-on without sequencing. Additionally, features like defeatable auto-standby, InstaWake™ (<100 ms) wake-up, and plenum-rated installation make it an ideal rack-mounted amplifier for large zone installations or commercial deployments