Choosing between EPZ P50 and EPZ P40 is less about “which is better” and more about which design matches your listening habits, preferred genres, and daily source devices. This guide focuses on official specifications, what those specs imply in real-world use, and who each model tends to fit best.
If you want to explore all IEM options first, you can browse the full lineup at Shop All.
Official specs (side-by-side)
| Spec | EPZ P50 | EPZ P40 |
|---|---|---|
| Driver configuration | 1 Dynamic + 2 Balanced Armature + 2 Planar Magnetic | 2 Dynamic + 1 Planar Magnetic + 1 PZT Piezoelectric Ceramic |
| Frequency response | 20Hz–20kHz | 20Hz–20kHz |
| Sensitivity | 106dB (±3dB) | 100dB (±3dB) |
| Impedance | 20Ω | 14Ω |
| Cable interface | 0.78mm 2-Pin | 0.78mm 2-Pin |
| Plug type | 3.5mm Single-ended / 4.4mm Balanced (Modular) | Modular / Interchangeable 3.5mm + 4.4mm plugs |
| Cable length | 1.2M (3.94ft) | 1.2M (3.94ft) |
Driver layout: what’s different in practice?
P50: 1DD + 2BA + 2 Planar
The P50 uses a five-driver, three-technology matrix. In general terms, a dynamic driver often anchors low-frequency weight, BA drivers can support midrange presence and separation, and planar drivers can contribute speed and fine treble texture. P50 is also positioned as an open-back metal cavity design, which can create a more spacious “open” feel compared with fully sealed designs.
P40: 2DD + Planar + PZT
The P40 takes a different route: dual dynamic drivers plus a planar unit and a PZT ceramic driver. In general terms, the planar driver can help with faster transients and treble texture, while the PZT element is often used to extend air/shimmer and micro-detail (ambience cues).
Compatibility & pairing (phones, dongle DACs, and desktop)
Both models use a standard 0.78mm 2-pin connection and include a modular plug system (3.5mm + 4.4mm), which is practical if you switch between phone dongles and balanced sources.
- P50: 20Ω impedance and 106dB sensitivity.
- P40: 14Ω impedance and 100dB sensitivity.
If your source supports 4.4mm balanced output, it can provide more headroom in some setups. If not, 3.5mm is a great default for phones and laptops.
Expert notes (how to pick based on your habits)
1) Modular 3.5mm vs 4.4mm — when does it matter?
If you mostly use a phone or laptop without balanced output, 3.5mm is the simplest choice. If you already own a balanced-capable dongle DAC or portable player, 4.4mm can be worth trying for extra headroom and control.
2) Long sessions & environment
If you listen for long periods at home and you value an “open” presentation, P50’s open-back positioning may feel especially comfortable. If you often listen in noisier places (commute/office), prioritize fit, seal, and ear tips—those factors can change the experience more than you expect.
3) If you’re sensitive to treble
If you tend to get treble fatigue, start with moderate volume and consider small EQ adjustments rather than listening louder.
Which model fits best (neutral recommendations)
Choose P50 if you…
- Prefer a more spacious, open presentation and listen for long stretches at home or at your desk.
- Like a multi-technology setup (DD + BA + planar) as a balanced all-rounder approach.
- Want higher listed sensitivity for comfortable volume from everyday sources.
Choose P40 if you…
- Want dual dynamic fundamentals plus planar speed and PZT “air” extension for ambience and micro-detail.
- Enjoy a balanced, natural listening style with a focus on texture and detail.
- Often pair with a clean dongle DAC and like switching between 3.5mm and 4.4mm outputs.
FAQ (quick answers)
Are both easy to drive?
Both are designed for common sources. If you want more headroom, pair with a quality dongle DAC or portable player.
Do I need 4.4mm to enjoy them?
No. Use 3.5mm for most devices. Try 4.4mm if your source supports it and you want to test extra headroom.
Need a quick recommendation for your device and music taste? Contact us and tell us your phone/player, favorite genres, and whether you prefer soundstage or micro-detail.