Line Audio CM4

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Page last updated Oct 29, 2025

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This little microphone has a natural, detailed and balanced response. Perfect for natural reproduction of acoustical instruments such as members of the bowed and plucked string-families, grand piano, brass, percussion, overhead choir and voice -with a minimum of colouration. The linear off axis performance is beneficial with large sound sources and for stereo recording, preserving sound character at an angle. The CM4 is tough enough to handle drums with full depth and punch, drum overhead clearly and crisp without strain. It also handles amplified instruments well. -A true allround microphone! It's suitable for professional studio and PA use, with a pricetag at the hobbyist level! It's very small size (about the same as a normal XLR plug) makes it easy to place, without being in the way. Its size and black colour makes it less visible on stage. Delivered with foam windsheild and microphone clip/holder (3/8" and 5/8"). During manufacturing each capsule is measured, selected, and modified by us to close tolerances. Out of range capsules are rejected. This in combination with the internal circuitry, results in a response with a unique flatness. These are quality microphones made for demanding situations.

The CM4 is the follower of CM3. Designed with the same goal and preferences around a new capsule, tailored to our specifications, using the same circuitry and body. Not surprisingly it ended up sounding very much like the CM3, with a slightly more neutral off axis response and a slightly higher back damping.

Videos

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Critic Reviews

Line Audio CM4 Review

musictech.com

The Line Audio CM4 is a compact powerhouse that delivers impressive audio quality and versatility at an unbeatable price. Its flat frequency response and strong off-axis performance make it shine in stereo applications and various recording scenarios. However, its lack of a pad and wide polar pattern might deter some users seeking immediate results. While it may require some EQ tweaks to fit certain sounds, its linearity ensures a natural representation of instruments, making it a worthy alternative to pricier competitors. Overall, the CM4 is a must-try for those looking to elevate their recording game without breaking the bank.

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5.0 out of 5

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miguel_angelo

984

almost 2 years ago

Best cheap small condenser mic in the world

This is the successor of the very well known CM3. This tiny handmade (in Sweden) condenser microphone costs only around 120€ and gives you virtually flat frequency response. The next mic I know that offers this flat response is the Schoeps, which costs around 10 times more. The polar pattern is a slightly wide cardioid, which is a bit tighter than the CM3 and makes it more versatile IMO. Might not be the best choice for loud and tight stages, unless you're close mic'ing. It doesn't feature any switches so having a low cut filter somewhere to deal with proximity effect might come in handy. It's quite sensitive to plosives, so for vocals a pop filter or the included foam shield is advisable. Very respectable figures for SNR and Noise, there's really nothing like it at this price point. I use a pair in AB configuration to record classical guitar and other acoustic instruments, and I am super pleased with the results. If you play any acoustic instrument and work hard on your timbre and dynamics, you will love this mic.

Roles:

Guitarist

Genres:

Rock Orchestra Folk, World, & Country