Zapco REF 150.4 Amp 4 Channel Class AB Bridgeable Amplifier 4x150w RMS

The Zapco REF 150.4 is a 4-channel Class AB bridgeable amplifier from the Zapco Reference Series, delivering 4 x 150W RMS at 4 ohms, 4 x 230W RMS at 2 ohms, or 2 x 470W RMS bridged at 4 ohms.

Key specifications

• Power at 4 ohms: 4 x 150W RMS
• Power at 2 ohms: 4 x 230W RMS
• Bridged power: 2 x 470W RMS at 4 ohms
• THD at rated power: under 0.02%
• Signal to noise: over 102dB
• Frequency response: 10Hz to 40kHz ±1dB
• Input sensitivity: 0.5V to 8V
• Fuse rating: 2 x 40A
• Dimensions: 210 x 62 x 416mm

REF 150.4 4-channel Class AB high-end amplifier

The Reference Series (originally called AG) was Zapco's first attempt to make the qualities behind the Zapco legend accessible across a broader range of amplifiers. The first full Reference Series line-up was completed in 2001 and was very well received. The current range comprises four models — 1, 2, 4, and 6 channels — featuring a refined design and carefully selected internal components for best-in-class audio performance. If you need a 4-channel option at a lower power output, the Zapco ST-4B 4-channel Class AB bridgeable amplifier is also worth considering.

Features

• 4-channel, Class AB, high-end amplifier
• Signal to noise ratio of over 102dB
• High-quality bipolar-input dual OP
• High-quality/transition frequency transistors
• High-precision 0.1% output resistors
• High-density, low loss factor input capacitors
• Low internal resistance power capacitors
• Ultra low on-resistance, fast switching MOSFETs
• High-power pure copper transformers
• Low resistance fuses