350 bass head +4 The EBS HD350 is a lightweight, 350-watt solid-state bass amplifier head built in Sweden. It features a MOSFET power amp, a built-in compressor/limiter, a 4-band EQ, and tube-emulated drive. Though discontinued for the upgraded HD360, it remains a favorite for its transparent tone and punchy low end.Key SpecificationsPower Output: 350 W RMS dynamic / 300 W RMS continuousWeight & Size: Under 9 kg (20 lbs), 2U rack-mountable (19" x 12" x 3.5")Impedance: Safe down to 2 ohms on later revisions (some early units rated for 4 ohms minimum)Features: Built-in compressor, character/bright filters, tube-emulated drive control, and a floating balanced XLR outputPower System: 9V EBS Phantom Power System on input and effects return