Musical Fidelity M6x 250.4/2 Multichannel Amplifier

Musical Fidelity M6x 250.4/2 Multichannel Amplifier

M6x 250.4/2 is the flexible choice for expanding a home theater system — power your main L/R channels in powerful bridged stereo mode, add 2 channels when moving from 5.1 to 7.1, or use all 4 channels to expand a 7.1 system to a full 11.1 setup. It's also a way to turn a 2-channel Hi-Fi stereo system into a cinematic 5.1 surround experience, using its 4 channels to power center, both surround speakers, and a passive subwoofer. Pairs well with the M6x 250.11, M6x 250.5, or M6x 250.7 for larger home theater setups. As an authorized Musical Fidelity dealer in Toronto, Canada, Vinyl Sound can help you plan a home theater expansion around this amplifier.

Key Features

• 250W per channel in stereo bridged mode
• 175W per channel in 4-channel mode
• Perfect expansion for a 5.1 or 7.1 AV receiver setup
• Gold-plated RCA and balanced XLR input per channel
• RCA through-output for daisy-chaining a signal to another amp (e.g. for bi-amping)
• Gold-plated, isolated speaker output terminals accept 4mm banana plugs, spades, or bare wire
• Trigger input/output for turning the amp on/off with other components
• Super-silent audiophile power transformer
• Completely silent operation — no fan or active cooling
• Custom fine-line aluminium extrusion front panel, black or silver finish

Bridged 2-Channel and 4-Channel Modes

In bridged 2-channel stereo mode, M6x 250.4/2 can drive your main L/R channels, replace an existing stereo amp for main channels while expanding surround to 7.1, or add 2 Dolby Atmos height channels. In 4-channel mode, it can expand a 5.1 system to 9.1, a 7.1 system to 11.1, add surround channels plus a passive subwoofer to turn a 2-channel stereo system into a 5.1 setup, or add up to 4 Dolby Atmos channels.

Balanced XLR Connections

M6x 250.4/2 offers a gold-plated RCA and a balanced XLR input on every channel, plus an RCA through-output to distribute the same signal to another amp's input, useful for bi-amping. If your preamp or AV processor has XLR outputs, Musical Fidelity recommends using the balanced connection, which increases dynamics, reduces noise, and improves signal-to-noise ratio compared to unbalanced RCA.

Fan-Free, High-Current Power Design

The amplifier is built modular with one Class A/B amplifier stage per channel. Musical Fidelity states this design preserves transients and micro-detail for a natural sound at any volume. Despite its power output, a sophisticated heat sink design eliminates the need for active cooling, so there's no fan noise at any listening level.

Technical Specifications

Frequently Asked Questions

What's the difference between bridged 2-channel and 4-channel mode?
Bridged 2-channel mode combines the amp's power into 2 high-current channels (250W @ 4Ω) for driving main L/R speakers. 4-channel mode splits the same amplifier into 4 independent channels (175W @ 4Ω each) for surround, center, or subwoofer duty.

How does this compare to the M6x 250.11?
M6x 250.11 is an all-in-one 11-channel amplifier for a full Dolby Atmos setup. M6x 250.4/2 is a flexible 4-channel expansion amp, designed to pair with an existing AV receiver or amp to add channels rather than replace the whole system.

Should I use RCA or XLR to connect my AV processor?
If your preamp or AV processor has XLR outputs, use the balanced XLR connection for increased dynamics, reduced noise, and improved signal-to-noise ratio over unbalanced RCA.