Meridian 258 Eight-Channel Power Amplifier

The Meridian 258 is a dedicated eight-channel power amplifier in a 1U rack-mount chassis — the amplification engine for distributed audio systems and multi-channel theatre installations that use passive loudspeakers. Over 100 watts per channel into 4 ohms, over 70 watts into 8 ohms. In a multi-room installation, it is the fit-and-forget amplifier that handles the speaker driving while the 218 Zone Controller or 251 handles source management and processing.

The Class-D topology delivers audiophile performance — Meridian's component selection philosophy applied to eight channels of amplification in a chassis that runs cool enough to install in a closed rack without ventilation concerns. See the full Meridian range we stock.

Performance and Installation

Eight channels of amplification in a 1U chassis makes the 258 efficient in rack space for large multi-room systems — a single unit can drive four stereo zones, or provide eight channels for a surround installation. The fanless design means no fan noise and no moving parts to service.

Output power:

• Over 100W per channel into 4 ohms
• Over 70W per channel into 8 ohms

The 258 is designed to be driven by Meridian zone controllers and processors. It includes a trigger input (3.5mm, 5–30 VDC) for integration into the Meridian control ecosystem, enabling power management from the same interface that controls sources and zones.

Technical Specifications

Who Is It For?

The 258 is for distributed audio installations and home cinema systems using passive loudspeakers where eight channels of clean amplification are needed in minimal rack space. It pairs naturally with the 218 Zone Controller for multi-room systems and with the 271 for large theatre installations. Those whose rooms use Meridian's active DSP loudspeakers do not need a separate power amplifier — the DSP speakers have amplification built in.

Buying from Martin's Hi-Fi

Martin's Hi-Fi has been in Norwich since 1968. Elizabeth Gould runs the business today, and we stock only brands we have heard properly and stand behind. We have a long-standing relationship with Meridian and extensive experience specifying amplification for distributed and theatre systems. We can advise on channel count, load matching, and integration with zone controllers and processors.

When you get in touch, you'll be speaking with Dave, Chris and Tim at info@martinshifi.co.uk, call 01603 627010, or WhatsApp on 07554 687137. You can read more about how we work on our Why Martin's page. We are at 85–91 Ber Street, Norwich, NR1 3EY.