The A-145-4 from Doepfer provides four LFOs simultaneously and is therefore a workhorse when several "standard oscillators" are required. Each modulator has outputs for triangle and rectangle , the speed is adjustable in wide ranges with one poti . The time range can be pre-adjusted LFO with a jumper between 0.04 Hz - 50 Hz and 0.002 Hz - 2 KHz on the back of the board.