Hertz
Hertz 78250025 Venezia V4 Marine 4-Channel Amplifier
Hertz 78250025 Venezia V4 Marine 4-Channel Amplifier
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Hertz 78250025 VENEZIA V4 Marine 4-Channel Class-D Amplifier (1160W Max RMS)
The Hertz 78250025 (Model: VENEZIA V4) is a high-output, Hi-Res Audio certified 4-channel marine amplifier utilizing Hertz Advanced D-Class (ADC) power architecture. Engineered to deliver high acoustic fidelity across marine environments, the V4 provides up to 290 W * 4 RMS at 2 Ω or 580 W * 2 RMS bridged at 4 *, delivering a total continuous output capacity of 1160 W RMS (14.4V DC, 1% THD).
Built into a heavy-duty die-cast aluminum chassis with a fanless convection cooling heatsink, the Venezia V4 achieves an IPX2 water-ingress rating and undergoes rigorous testing for UV protection, salt-fog resistance, thermal shock, and high-vibration exposure. The amplifier features fully differential balanced inputs to suppress electromagnetic interference, heavy-duty Safe-Lock Plug & Play power/speaker terminals, and an internal crossover network shielded beneath a removable polycarbonate top cover.
Key Features
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Advanced Class-D (ADC) Topology: Delivers efficiency with high power density, generating extended bandwidth (10 Hz to 42 kHz) for Hi-Res Audio certification.
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IPX2 Marine Marine-Grade Enclosure: Die-cast aluminum chassis resists salt spray, moisture, and engine room vibration without internal fans.
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Safe-Lock Interconnects: Heavy-duty, locking Plug & Play power, signal, and speaker harness connectors prevent accidental disconnections due to hull impact.
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Top-Mounted Protected Crossover Controls: Crossover pots, bass boost switch, and channel modes are accessible on top of the chassis behind a clear polycarbonate protective seal.
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Fully Differential Inputs: Rejects noise and RF interference induced by vessel alternators, radar, and VHF equipment.
Specifications
| Feature | Specification |
| Manufacturer / Brand | Hertz Marine Audio |
| Part Code / SKU | 78250025 |
| Model Designation | VENEZIA V4 |
| Amplifier Class / Architecture | Advanced D-Class (ADC) — Hi-Res Audio Certified |
| Channel Configuration | 4 / 3 / 2 Channels (Bridgeable) |
| RMS Power Rating @ 4Ch (4 Ω) | 160 W * 4 @ 14.4 VDC (1% THD) |
| RMS Power Rating @ 4Ch (2 Ω) | 290 W * 4 @ 14.4 VDC (1%* THD) |
| RMS Power Rating @ 3Ch (2 Ω+ 4 Ω) | 290 W * 2 (2 Ω) + 580 W Ω 1 (4 Ω) |
| RMS Power Rating @ 2Ch Bridged (4 Ω) | 580 W * 2 @ 14.4 VDC (1% THD) |
| Total Continuous Power Output | 1160 W RMS |
| Frequency Response (-3 dB) | 10 Hz to 42 kHz |
| Signal-to-Noise Ratio (A-Weighted @ 1V) | 102 dBA |
| Total Harmonic Distortion (THD @ 100 Hz) | < 0.06% |
| Damping Factor (100 Hz @ 4Ω) | > 130 |
| Pre-In Input Sensitivity / Impedance | 0.2 to 5 VRMS / 10 k Ω |
| Crossover Filters (Ch A & Ch B) | Full / Hi-Pass / Lo-Pass: 50-4000 Hz @ 12 dB/Oct. |
| Bass Boost (50 Hz) | 0 to +12 dB (Adjustable) |
| Operating Voltage Range | 9.0 to 16.0 VDC (Idle: 1.6 A / Off: 0.04 mA) |
| Optional Accessories | HRC BM2 Subwoofer Remote Volume Control |
| Ingress Protection & Environmental | IPX2 Water-Resistant, Salt-Fog, UV, Vibration Proof |
| Dimensions (W * D * H) | 270 mm* 185 mm * 54 mm (10.63'' * 7.28'' * 2.12'') |
| Weight | 2.66 kg (5.86 lbs) |
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