SE Electronics DM2 T.N.T, Active Inline Preamplifier, Switchable +15 / +30 dB amplification, Ideal for low output ribbon or dynamic microphones, Switchable load impedance (8 stages), Class-A FET transistors, Low self-noise, An additional output stage for an independent load, Allows long cable runs and reduces the susceptibility from RF interference, Gold-plated XLR contacts, Robust all-metal housing, Requires 48 V phantom power