#1
Sennheiser HD 600
Open-back dynamic headphone · Open design, 40mm driver, 12Hz-40kHz, 300 ohm impedance, balanced and neutral tone$200–$300 usedBest for: Best overall, neutrally accurate, reference standard for mixing and critical listening
The Sennheiser HD 600 is the most respected open-back headphone in the world — it appears in professional studios, mastering labs, and home studios for critical listening and mixing. The HD 600's balanced, neutral frequency response reproduces audio accurately without flattering or coloring. The open-back design creates a natural soundstage and lets air move through the driver, creating lifelike acoustics. The 300-ohm impedance requires sufficient amplification (quality headphone amp or audio interface output), making them a serious monitoring tool. Used at $200–$300.
What to check used: The HD 600 requires a headphone amplifier or quality audio interface to drive properly — low-impedance devices (smartphones, laptops) lack power and the HD 600 will sound weak. The open-back design means sound leaks out — nearby people can hear what you are listening to. Not suitable for isolation recording.
#2
AKG K702
Open-back dynamic headphone · Open design, 40mm driver, 10Hz-39.8kHz, 62-ohm impedance, wide soundstage, neutral response$120–$180 usedBest for: Wide soundstage, mixing-focused, great value compared to HD 600
The AKG K702 is a professional mixing headphone with an exceptionally wide and accurate soundstage — spatial imaging is exceptional, making the K702 great for mixing music where stereo balance and pan positioning matter. The 62-ohm impedance is lower than Sennheiser (easier to drive from audio interfaces and amps). The K702 is used in professional studios and mastering labs as a mixing reference. Used at $120–$180, the K702 offers similar accuracy to the HD 600 at a lower price.
What to check used: The K702's wider soundstage is a strength for mixing but can mask some midrange details compared to more intimate headphones. Some users find the K702 initially fatiguing on very long listening sessions — test for comfort. The open-back design leaks sound.
#3
Beyerdynamic DT 990 Pro
Open-back dynamic headphone · Open design, 45mm driver, 5Hz-35kHz, 250-ohm impedance, V-shaped bright tone, studio version$100–$150 usedBest for: Bright, detailed sound for detailed mixing work, affordable professional option
The Beyerdynamic DT 990 Pro is the professional studio version of the popular DT 990 — it has a V-shaped frequency response with boosted lows and highs, emphasizing detail and brightness. The DT 990 Pro's bright character is excellent for detailed mixing work where you need to hear every frequency clearly. The 45mm driver produces a wide, detailed soundstage. Used at $100–$150, the DT 990 Pro is an affordable professional mixing headphone.
What to check used: The DT 990's bright, V-shaped response is not as neutral as the Sennheiser HD 600 — mixes made on the DT 990 can sound overly bright when checked on neutral monitors. The high-impedance 250-ohm design requires a headphone amplifier for optimal performance. Open-back design leaks sound.
#4
Philips SHP9500
Open-back dynamic headphone · Open design, 40mm driver, 12Hz-38.5kHz, 32-ohm impedance, lightweight, neutral response$40–$65 usedBest for: Most affordable open-back, lightweight, natural balance, great for learning
The Philips SHP9500 is the most affordable quality open-back headphone — it offers a naturally balanced, neutral response with excellent build quality. The 32-ohm impedance makes them easy to drive from any source including smartphones and laptops. The lightweight design (162g) makes them comfortable for long listening sessions. For beginners learning to mix, the SHP9500 is an excellent first open-back headphone. Used at $40–$65.
What to check used: The SHP9500 is less detailed than Sennheiser or AKG in the high frequencies — it is not a mastering-grade headphone but an excellent general-purpose monitoring tool. The open-back design is not suitable for isolation recording. Comfort is good but the clamping force is slightly light (headphones can slide during movement).
#5
Hifiman HE400se
Open-back planar headphone · Open-back planar magnetic driver, 20Hz-20kHz, 25-ohm impedance, fast transient response, lightweight$80–$130 usedBest for: Planar magnetic sound for detail and speed, budget planar option
The Hifiman HE400se uses a planar magnetic driver (different from moving-coil designs) that delivers fast, detailed transient response and a wide soundstage. Planar drivers produce less distortion at high volumes and reproduce fast-changing details with exceptional clarity. The HE400se is Hifiman's entry-level planar option and offers that planar character at an accessible price. Used at $80–$130.
What to check used: Planar drivers sound different from moving-coil (dynamic) drivers — the tonal character takes acclimation. Some users prefer the planar sound; others find it too analytical. The HE400se is slightly bright. Open-back design means sound leaks.
#6
Sennheiser HD 598
Open-back dynamic headphone · Open design, 40mm driver, 12Hz-38.5kHz, 50-ohm impedance, warm tone, discontinued but widely available used$80–$130 usedBest for: Warm, smooth tone for listening and mastering, easy to drive, excellent value
The Sennheiser HD 598 is a classic professional headphone with a naturally warm, smooth frequency response — discontinued but widely available used. The warmth is often preferred for mastering because it is forgiving and mixes made on the HD 598 translate well to typical consumer listening environments (most listeners have warmer-than-flat speaker setups). The 50-ohm impedance is easy to drive from any interface. Used at $80–$130.
What to check used: The HD 598's warmth means it is less neutral than the HD 600 — not ideal for reference-grade mixing where flat accuracy is critical. Best used as a secondary reference headphone to check mix translation. Open-back design leaks sound.
#7
Grado SR80x
Open-back dynamic headphone · Open design, 40mm driver, 20Hz-20kHz, 32-ohm impedance, forward-leaning midrange, American-made$80–$120 usedBest for: Forward, present sound for detail work, American-made craftsmanship, fun listening
The Grado SR80x is a legendary headphone known for its forward, present midrange that emphasizes vocal detail and instrument clarity. Grado headphones are hand-assembled in Brooklyn with focus on sonic accuracy. The SR80x is an excellent learning tool for understanding midrange balance because every midrange detail is obvious. Used at $80–$120.
What to check used: The Grado's forward midrange is excellent for detail work but can be fatiguing on very long sessions. The open-back design has significant sound leakage (louder than typical open-backs). Not suitable for isolation or shared space recording. Grado headphones have a cult following but are not for everyone.