I think it's just that it's black..
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A bass head with the features you need for complete tonal control, ample power and rugged design.[/b][/font][/color][color=#000000][font=Arial, Calibri, Helvetica, sans-serif][size=3]
Found on stages all over the world, the HA Series HA3500C 350 Watt Hybrid Bass Amp Head is back in classic black. Yet, it retains all the same rock-solid performance and features as the original that have made it one of the most popular bass amplifiers of all time.
The 3500C's unique circuitry ensures that every nuance of your bass performance is faithfully reproduced. Featuring two Pre-Amp input knobs, allowing custom blending of tube and solid-state tone, and ten-band graphic EQ, the 3500C is ideal for the player who wants plenty of power and control. A dedicated preset button allows you to set an equalization curve and two fully adjustable contour knobs provide even more shaping of your distinctive sound. A built-in compressor adds real "punch" to your bass sound, and also allows you to smooth out volume differences between notes.[/size][/font][/color]