Fir Audio M4 and 64 Audio Volur use 1DD+3BA and 2DD+8BA driver setups respectively. Fir Audio M4 costs $1,900 while 64 Audio Volur costs $2,499. 64 Audio Volur is $599 more expensive. 64 Audio Volur holds a decisive 2.5-point edge in reviewer scores (6 vs 8.4). 64 Audio Volur has significantly better mids with a 1.5-point edge, 64 Audio Volur has significantly better treble with a 3.5-point edge and 64 Audio Volur has significantly better soundstage with a 1-point edge.
Insights
Metric | Fir Audio M4 | 64 Audio Volur |
---|---|---|
Bass | 4 | 4 |
Mids | 5.5 | 7 |
Treble | 4.5 | 8 |
Details | 5 | 5 |
Soundstage | 7 | 8 |
Imaging | 6.5 | 6.5 |
Dynamics | 8 | 8 |
Gaming capabilities | 4.6 | 7.7 |
Fir Audio M4 Aggregated Review Score
Fir Audio M4 Average Reviewer Scores
64 Audio Volur Aggregated Review Score
64 Audio Volur Average Reviewer Scores
Fir Audio M4 Details
Driver Configuration: 1DD+3BA
Tuning Type: Warm neutral
Price (Msrp): $1,900
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64 Audio Volur Details
Driver Configuration: 2DD+8BA
Tuning Type: Cameleon
Price (Msrp): $2,499
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Fir Audio M4 User Review Score
Fir Audio M4 Average User Scores
Average User Score: n/a
Based on 0 user reviews
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64 Audio Volur User Review Score
64 Audio Volur Average User Scores
Average User Score: n/a
Based on 0 user reviews
No user reviews yet. Be the first one who writes a review!
Fir Audio M4 Gaming Score

Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
4.6Gaming Grade
C64 Audio Volur Gaming Score

Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
7.7Gaming Grade
AFir Audio M4 Scorings
Average Technical & Tuning Grades
Average Tunign Grade
B-- Generally enjoyable tonal character with some noticeable unevenness. Maintains listenability while showing room for refinement in frequency balance.
Average Technical Grade
B- Satisfactory technical performance. Handles basic detail retrieval adequately in most tracks. Maintains reasonable cohesion in simpler arrangements.
64 Audio Volur Scorings
Average Technical & Tuning Grades
Average Tunign Grade
A- Well-executed tonal character. No major flaws with good technical control. Smooth presentation works with multiple genres.
Average Technical Grade
A+- Very competent with articulate presentation. Well-defined layers and precise imaging. Soundstage is immersive and handles dynamics well.
Fir Audio M4 Reviews
Fir Audio M4 reviewed by: Crin
Too similar to the M3 to be worth the price markup. Crin Youtube Channel
Fir Audio M4 reviewed by: Shuwa-T
Comment: Warm and lush midrange. Soundstage is surprisingly wide, midrange focused tuning Note definition is strangely subpar despite treble boost
64 Audio Volur Reviews
64 Audio Volur reviewed by:
Fresh Reviews
64 Audio Volur reviewed by: Super* Review
If you are a lover of bass, this is a good option. Does not sacrify the rest of the sound signatureSuper* Review original ranking
Super* Review Youtube Channel
64 Audio Volur reviewed by: Jaytiss
64 Audio's finest. Jaytiss Youtube Channel
Fir Audio M4 User Reviews
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