The TLM 103 is addressed from the front, marked with the red Neumann logo on the microphone body.
The K 103 large diaphragm capsule is based on the K 87, well known from the U 67/U 87 microphones. The capsule has a flat frequency response up to about 5 kHz, and above that, a wide flat 4 dB presence boost. The large wire mesh headgrille protects the capsule from plosive sounds and effectively prevents pop noises.
These characteristics are achieved without resorting to corrective resonance effects. Therefore, the microphone maintains an excellent impulse response and reproduces the finest details of music and speech without coloration.
With just 7 dB-A / 17.5 dB CCIR the self-noise level of the TLM 103 is so reduced that even the smallest signals are reproduced basically noise-free. As it is capable of handling sound pressure levels up to 138 dB without distortion, the TLM 103 provides a dynamic range of 131 dB, according to DIN/IEC 651.
The letters TLM stand for "transformerless microphone". With TLM technology the usual output transformer is replaced by an electronic circuit. As with traditional transformers, it ensures good common mode rejection, and prevents RF interference that may influence the balanced audio signal.
The entire internal construction is elastically mounted to attenuate any structure borne noise that could interfere with the TLM 103's operation. Furthermore the capsule is set on an elastic mount. The frequency range reaches below 20 Hz and thus even very low bass signals are reproduced without coloration. Due to this low frequency extension, the TLM 103 is more sensitive to structure borne interference and wind noise. For such cases, the elastic suspension EA 103 and the windscreen WS 87 are available as accessories. For close vocal use, the PS 10 or PS 20 pop screens are recommended.