Neumann TLM 103 — a studio condenser microphone

With processors and smartphones, a newer product is usually better. Studio microphones are less straightforward. Audio professionals still consider classic Neumann microphones a sound reference for other manufacturers. New products are often described as modern versions of a famous Neumann from the 1970s or as using a classic Neumann capsule from the 1960s. Even Neumann asks users not to idealize the materials and technology of those years. Diaphragms were thicker, manufacturing was less precise, and the choice of electronic components was smaller. Technical progress brings new designs with the potential for better sound. Ignoring that progress would make little sense. However, professionals and musicians ask German engineers to protect the sound they love and avoid changing what they feel needs no improvement. The manufacturer therefore gives updated microphones new names while continuing to make established models with steady demand. Every innovation initially meets distrust. This happened with the move from tubes to transistors, and again when transformers were removed. Yet after 20–30 years, those models become classics too. The pattern is clear.

The same happened with the Neumann TLM 103. This condenser microphone was introduced in 1997 as a successor to the classic U 87 and has since become a modern classic. The TLM 103 is a solid-state transformerless microphone made with modern technology. Its sound is more accurate and neutral, without added coloration. Its large-diaphragm K 103 capsule develops the traditions and strengths of the legendary K 67/K 87 capsules. The original goal was to make the U 87 lighter, simpler, and more affordable, competing in the broader market at around $1000. The result exceeded expectations: the model became a bestseller and won many awards.

The TLM 103 has no transformer, polar pattern selection, PAD switch, or high-pass filter. Its internal circuit is therefore about half as expensive and complex, benefiting the price. Early versions allowed pattern selection with a switch on the circuit board, but current TLM 103 units have a fixed cardioid pattern. Fortunately, this is the pattern used in 99% of studio recording situations.

The TLM 103 sound combines Neumann's fine midrange, a well-defined lower register, and a small treble boost. Other strengths include an exceptionally low noise level and high sensitivity. The TLM 103 suits vocals and many instruments, whose bright sound helps them remain clear in a mix.

Like all Neumann transformerless TLM models, the TLM 103 has a fairly short body. Only the smaller model in the range is more compact. We covered it in our review of the Neumann TLM 102. While the TLM 102 is intended for broadcasters and home studios, the TLM 103 is a fully professional microphone for commercial recording studios. It matches other models in the range for sound while offering a more attractive price.

Neumann TLM-103 specifications

Type	Condenser
Capsule	K 103
Polar pattern	Fixed cardioid
Frequency range	20 Hz–20 kHz
Sensitivity	-32,5 dBV (23 mV/Pa)
Nominal impedance	50 ohms
Nominal load impedance	1 kohm
Equivalent noise level, CCIR	17.5 dB
Equivalent noise level, A-weighted	7.5 dBA
Maximum sound pressure level	138 dB
Signal-to-noise ratio	87 dBA, 76.5 dB (CCIR)
Maximum output voltage	13 dBu
Dynamic range	48 V, ±4 V
Current consumption (P48, IEC 61938)	3 mA
Connection	XLR 3 F
Dimensions	60 × 132 mm
Weight	450 g

The TLM 103 is available in black or silver and in several packages. These range from simple, affordable sets with a rigid stand mount to matched stereo pairs with shock mounts and a metal case.

We recommend buying a set with a shock mount from the start. Finding a compatible mount is difficult, and ordering the branded mount later adds unnecessary time, cost, and trouble.

We tested this version, the TLM 103 Studio Set, with its included shock mount.

According to the manufacturer, the TLM-103 is sensitive to low-frequency vibration transmitted through the housing. A shock mount is therefore strongly recommended. The microphone also has no extra protection against breath, dust, dirt, or saliva reaching the diaphragm. A pop filter is essential both for clean recordings and to protect the diaphragm from damage over time. Strong metal cases are practical too: they are the safest way to store a microphone between sessions. Studios usually keep several different models for different tasks.

The microphone uses a large-diaphragm K103 capsule. A rubber support isolates it from housing vibration and handling noise. Maximum SPL is 138 dB. More importantly, the TLM 103 has the highest sensitivity and lowest self-noise among the German manufacturer's microphones. This comes from the more modern capsule and updated electronics.

Below are the manufacturer's frequency response and polar pattern graphs at different frequencies.

The response shows a very even midrange and a small 4 dB boost above 5 kHz. In theory, the added presence can make EQ unnecessary for voice recording. However, modern music production rarely avoids processing entirely. Rather than focusing too much on graphs, we prefer to examine real use.

Many online videos and recording examples demonstrate the TLM 103's high quality. Neumann clearly does not need any individual's approval. Still, nothing replaces personal experience, and trying a legendary microphone is always interesting and exciting.

For the recording test, we invited a professional female vocalist with extensive stage and studio experience. Recording took place in an acoustically treated room with a Neumann PS15 pop filter. The example is unprocessed to show the microphone's capabilities fairly. Anyone can download the file and try EQ, compression, and reverb.

We were more than satisfied with the result. The TLM 103 records voice beautifully with little effort. We especially liked its detail across the full frequency range. The transformerless circuit adds no coloration while capturing the full body of the voice. The tone is not thinned out and sounds very natural. Every small detail of the performance is preserved. The high-quality recording leaves plenty of room for later processing. We also tried wind instruments, specifically alto saxophone and trumpet. The microphone handled those very well too. In our view, however, voice recording shows its strengths best.

Conclusions

The Neumann TLM 103 is a device that is difficult to describe without too many positive adjectives. The best approach is to listen and try it yourself. Even so, we can state our conclusions. In our view, the TLM 103 is an excellent microphone for demanding work in any recording studio. Given its capabilities and very reasonable price, we do not consider the lack of pattern selection or a sensitivity switch a disadvantage. In practice, its exceptionally high sensitivity and the lowest self-noise among Neumann microphones matter more.

A good studio naturally has several microphones for different voices and recording situations. If an authentic transformer-based U 87 or tube U 67 sound is needed, professionals will choose those classics. But users who have not tried the more innovative TLM 103 should not dismiss it. Our own experience shows that technical progress in microphones can deliver excellent results, especially from a legendary German manufacturer.

Note. This is an adapted machine translation into English. It follows the “In simple terms” approach. Read the original article at https://prosound.ixbt.com/microphones/neumann-tlm103.shtml.