Behringer NX1000 1000w Power Amplifier with SmartSense Acoustic Amps but you can use any

but you can use any effects you like

alternating bass

This closed hi-hat attachment is ideal for double bass playing

High-efficiency 1200 W Class-D power amplifier delivers up to 132 dB peak SPL utilizing transducers designed and engineered by EV

It clearly gives the voice more space and positions it cleanly in front of loud instruments

Behringer NX1000 1000w Power Amplifier with SmartSense Acoustic Amps but you can use anyNX1000 Ultra Lightweight 1000 Watt Class D Power Amplifier with SmartSense Loudspeaker Impedance Compensation Delivers 2 x 500 Watts into 2 Ohms; 2 x 300 Watts into 4 Ohms; 1000 Watts into 4 Ohms (bridge mode) and weighs less than 7. 3 lbs 3. 3 kg Ultimate reliability through revolutionary cool running High Density Class D technology with "near zero" thermal buildup Ultra efficient switch mode power supply for noise free audio, superior transient