Soundmax SX-N700.4 amplifier 4 channel

Soundmax SX-N700.4 – 4-channel Class AB power amplifier 140W x4 @ 4 Ohm with power, control and musicality

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The Soundmax SX-N700.4 is a powerful 4-channel Class AB power amplifier, developed for those who want to drive demanding speaker systems with both power and musical precision. With 140W RMS per channel at 4 Ohm, it delivers stable power for front systems, midbass or active solutions where control and sound quality are crucial.

When bridged, the power amplifier delivers 350W RMS x2 at 4 Ohm, making it excellent even for powerful midbass or smaller subwoofers. The classic AB topology contributes to a warm and dynamic sound character across the entire frequency range 10–20,000 Hz, with good separation and natural reproduction.

The SX-N700.4 is equipped with both a high-pass filter (100–1,000 Hz) and a low-pass filter (40–400 Hz), which provides great flexibility when active crossover. With bass boost up to 12 dB at 45 Hz, the low register can be amplified when needed, while a damping factor of over 170 ensures good control over the elements and a tight, responsive sound.

Thanks to the high-level input, the power amplifier can be easily integrated with original stereos, and with an input sensitivity of 0.2–6 V, it works equally well with aftermarket units. Three 35A fuses provide a secure power supply, and a signal-to-noise ratio of 90 dB ensures clean reproduction even at higher volumes.

With its generous dimensions of 412 × 182 × 53 mm, the SX-N700.4 is built for stable operation and effective cooling during longer gaming sessions. The Soundmax SX-N700.4 is an excellent choice for those looking for powerful Class AB performance, high control and reliable sound quality in a robust 4-channel power amplifier.

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Technical data

• Number of channels 4 Channels
• Amplifier class Class AB
• Power into 2 ohms RMS 2x 175W
• Power into 4 ohms bridged RMS 2x 350W
• Power into 4 ohms RMS 4x 140W
• Frequency range 10 - 20,000 Hz
• High pass filter 100 - 1,000 Hz
• Low pass filter 40 - 400 Hz
• Bass boost 0-12 dB @ 45 Hz
• Damping factor >170
• Operating voltage 9 -15 V
• High level input Yes
• Input sensitivity 0.2 - 6V
• Fuses 3x35A
• Signal noise 90dB
• Dimensions 412 x 182 x 53 mm