- With the built-in 1 Watt amplifier this device is ideal for (8 Ohm) speaker tests - Line output for active speaker or mixer tests - Tunable frequency between 20 Hz and 20 kHz - Power supply with 9V block battery - Output switchable between XLR line or speaker twist for the speaker test - Dimensions: 110 x 72 x 40 mm EUR 38.00 - See more - Buy online