Power to spare - a whopping 400 watts into 4 ohms.

Two independent inputs accommodate both passive and active bass guitars. It is almost impossible to overload the input of your HA4000!

Dual speaker outputs so you can connect two 8 ohm speaker cabinets without the need for daisy-chaining.

Protection relay circuitry protects connected speakers from dangerous overloading, and prevents "thumps" when powering on or off.

Fan-cooled to avoid thermal and overheating problems.

Dual effect loop send and return jacks (one pair post-EQ and the other pre-EQ) allow you to connect to professional outboard effects processors.

Electronically balanced XLR Direct and Preamp outputs provide a convenient means of routing signal to professional mixing consoles in both live performance and recording environments. In addition, an unbalanced 1/4 in. line output allows you to connect slave amplifiers.

Ground lift switch helps prevent hum or buzz from entering the Direct Out and Preamp Out signals.

Four bands of high-quality equalization allow you to create a broad range of tonal colors for your bass instrument. The 2 mid-bands are fully parametric, with sweepable center frequency and adjustable bandwidth control.

Provides a fifth, "DBASS" (Deep Bass) band - a harmonic enhancer adds extremely low frequencies to your bass signal.