ZETTA 460 Power Amplifier
Introduction to the ZETTA 460
The RAM Audio ZETTA 460 is a four-channel Class H power amplifier built around an upside-down mono-block design, where a single all-in-one power module carries the entire amplifier assembly. It is the product of a focused engineering study aimed at the best balance between cost and performance, and it sits among the most powerful four-channel models in the ZETTA range. For installers and rental operators who need serious four-channel output without the weight or price of a flagship touring amp, the 460 is a direct, dependable answer.
Four-Channel Power Across Every Common Load
The ZETTA 460 delivers 4 x 1450 W into 2 Ω, 4 x 1500 W into 4 Ω, and 4 x 1100 W into 8 Ω, with consistent power behaviour across impedances. Bridged, it drives 2 x 2900 W into 4 Ω or 2 x 3000 W into 8 Ω, so a single chassis can run a four-way satellite rig or a pair of high-demand subwoofers. Each channel runs independently with its own 21-step detented, sealed level control.
70V and 100V Line Operation
Unlike most touring amplifiers, the ZETTA 460 also drives constant-voltage line systems directly: 4 x 1500 W at 70 V or 4 x 800 W at 100 V. That makes it equally at home in distributed installed-sound work — multi-zone retail, hospitality and house-of-worship systems — as it is on a Lo-Z stack, removing the need for separate line-system amplification.
QuantaPulse™ Switch-Mode Power Supply
The last-generation QuantaPulse™ switching power supply gives the amplifier refined sensing and control of the power flow, holding output steady under demanding programme material. It is the same power-supply lineage that underpins RAM Audio’s higher-tier touring amplifiers, here applied to a cost-effective four-channel platform.
Class H Efficiency and Up-Side-Down Cooling
A high-efficiency Class H output stage keeps heat and current draw down relative to delivered power, and the up-side-down chassis layout positions the electronics to avoid fan-borne dust accumulation. Temperature-controlled back-to-front forced-air cooling keeps the amplifier inside its safe operating window through long shows and continuous install duty.
Comprehensive Protection
The ZETTA 460 carries RAM Audio’s full protection set. PMS™ (Power Management System) regulates how much power the amplifier delivers under varying conditions; SSP™ (SOA Sentry Protection) limits output into an incorrect load or a direct short; and ICL2™ provides improved intelligent clip limiting. These work alongside soft-start, turn-on/off transient muting, thermal, DC, RF, short-circuit and open/mismatched-load protection.
Connectivity and Controls
Inputs and outputs use industry-standard Neutrik® XLR and Speakon® connectors. An input link switch allows the signal to be daisy-chained across channels, and a front-panel selector handles dual or bridge operation. Signal, PMS and clip LEDs per channel give clear at-a-glance monitoring.
Summary of Features
- Four-channel Class H amplifier: 4 x 1450 W @ 2 Ω, 4 x 1500 W @ 4 Ω, 4 x 1100 W @ 8 Ω
- Bridged output: 2 x 2900 W @ 4 Ω / 2 x 3000 W @ 8 Ω
- 70V (4 x 1500 W) and 100V (4 x 800 W) constant-voltage line operation
- Last-generation QuantaPulse™ switch-mode power supply
- PMS™, SSP™ and ICL2™ protection with full safety set
- Up-side-down design and temperature-controlled forced-air cooling
- Neutrik® XLR inputs with input link, Neutrik® Speakon® outputs
- Detented, sealed 21-step level controls; dual or bridge mode
- 2U rack format, 483 x 89 x 335 mm, 8.5 kg
The ZETTA 460 brings high four-channel power, true Lo-Z and Hi-Z flexibility, and RAM Audio’s full protection suite into a compact, serviceable 2U chassis. Whether it’s driving a four-way touring rig, a bridged subwoofer pair, or a multi-zone 70V/100V installation, the 460 is a reliable workhorse that earns its place in the rack.
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About RAM Audio
RAM Audio products are engineered and manufactured in Spain, with a strong focus on high-performance amplifier design and long-term reliability. The brand combines advanced Class D and power management technologies with strict quality control processes to ensure consistent, dependable operation in demanding professional environments. Their production philosophy emphasizes efficiency, thermal stability, and electrical robustness, resulting in amplifiers that perform reliably under continuous load.
Over the years, RAM Audio has built a solid reputation in the professional audio market, particularly in touring, fixed installation, and large-scale sound reinforcement applications. The brand is widely recognized for delivering powerful, stable amplification solutions that balance performance, durability, and real-world usability, making RAM Audio a trusted choice for system integrators and audio professionals who require uncompromising reliability.
