How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-30 · 7 min read · Independent comparison
• Bolanle P2 — biggest strength: triple power flexibility (USB-C 5V, rechargeable AAA, or standard AAA) plus XLR and 1/4" TRS input switching in one compact metal unit.
• Bolanle P2 — biggest trade-off: it is an amplifier, not a headphone. You still need your own in-ear monitors to hear anything.
• KZ ZAS Pro 8-Driver — biggest strength: a 1DD+7BA hybrid driver array with a PCB 3-way crossover and up to 37 dB of claimed ambient noise blocking.
• KZ ZAS Pro 8-Driver — biggest trade-off: it is a wired, no-mic IEM. No amplifier stage, no battery, no wireless — it is a pure earphone.
• Who the Bolanle P2 is for: gigging musicians who already own in-ears and need reliable, isolated monitoring on stage.
• Who the KZ ZAS Pro is for: musicians, gamers and audiophiles who need the earphone itself — detailed sound, deep bass, serious isolation.
The Bolanle P2 is a single-purpose tool, and it is honest about that. It is a portable in-ear monitor amplifier with a solid metal-and-plastic chassis, a footprint small enough to clip to a belt or drop in a gig bag, and a claimed 5-watt output across two channels. The headline feature is the triple-power design: USB-C 5V for studio and rehearsal, rechargeable AAA batteries for stage freedom, or plain AAA cells as an instant swap when something runs flat. For a working player, that third option is the one that matters. You are not hunting for a charger between sets — you are dropping in a battery.
Input flexibility is the second thing that stands out. The P2 accepts both XLR balanced and 1/4" TRS connections, so it talks to mixing consoles, audio interfaces and PA systems without adapters. A stereo/mono switch lets you flip between full stereo width for immersive monitoring and mono for single-ear work or PA compatibility. In my opinion, that mono toggle is underrated — drummers and bassists who pull one ear out to hear the room will use it constantly.
KZ ZAS Pro 8-Driver: Who It's For
The KZ ZAS Pro is the earphone half of the equation, and it is aimed squarely at people who want to hear detail. The driver array is the story: a 10 mm super-linear dynamic driver handling the low end, paired with seven balanced armature drivers, split by a PCB 3-way crossover that manages the low, mid, high and ultra-high bands. KZ describes the tuning as having forward mids elevated for articulation in the region where instruments and voices live — a deliberate choice for monitoring rather than a smiley-faced consumer curve.
The spec sheet backs up the "monitor" framing. Sensitivity is rated at 118 dB and impedance at 41 ohm, which tells you these will get loud off modest sources, and the frequency response extends to 40 kHz. Noise isolation is claimed at up to 37 dB of ambient rejection — meaningful in a loud room, whether you are on a stage, in a gaming session, or trying to focus in a noisy space.
Comfort and durability get real attention too. The wireform cable wraps over the ears to hold the earpieces in place for long sessions, and KZ states the ergonomic shape is designed to reduce the pressure that causes ear fatigue. The cable is detachable and every part is described as serviceable — a genuine plus for anyone who has thrown away a favourite pair because one channel died. The housing is polycarbonate, the colour is white, and the connection is a standard 3.5 mm wired jack.
Who should buy it: musicians who need an affordable-feeling entry into a multi-driver hybrid monitor, gamers who want positional clarity, and listeners who want deep bass without losing midrange articulation. Who should skip it: anyone who needs a microphone — this is explicitly the no-mic version — or anyone who wants wireless freedom. It is wired only, and there is no battery to check, charge or worry about.
Side-by-Side: Which Should You Choose?
• Best for the sound itself → KZ ZAS Pro 8-Driver. The 1DD+7BA hybrid array and 3-way crossover are where the audio quality lives.
• Best for power reliability → Bolanle P2. Three power paths (USB-C, rechargeable AAA, standard AAA) mean a dead battery is a two-second fix.
• Best for noise isolation → KZ ZAS Pro 8-Driver. Up to 37 dB of ambient blocking is claimed, with a wired connection that has no latency.
• Best for long listening sessions → KZ ZAS Pro 8-Driver. Over-ear wireform cable and fatigue-reducing ergonomics are built for hours.
• Best for serviceability → KZ ZAS Pro 8-Driver. Detachable cable and replaceable parts rather than a sealed unit.
• Best for flexible routing → Bolanle P2. The stereo/mono switch handles both immersive monitoring and single-ear stage work.
• If you own in-ears already → Bolanle P2. It upgrades what you have. If you own nothing → KZ ZAS Pro 8-Driver, then add an amp later.
If I had to pick one, I would buy the KZ ZAS Pro 8-Driver. My reasoning is simple: the earphone is the part that determines what you actually hear, and the 1DD+7BA array with a 3-way crossover and 37 dB of claimed isolation does more for a musician or listener than any amplifier can. The Bolanle P2 is a genuinely clever piece of kit — the triple-power design alone would earn it a place in my gig bag. But it is a multiplier, not a starting point. Buy the ZAS Pro first, and add the P2 when your monitoring chain needs the extra control.
how to check headphones battery
For the KZ ZAS Pro 8-Driver, there is nothing to check — it is a wired, passive in-ear monitor with no battery. For the Bolanle P2, the power source is USB-C 5V or AAA cells, so you verify charge by checking the batteries or the USB-C connection rather than a battery indicator on a phone.
how to check headphones battery on iphone
An iPhone only shows a battery widget for Bluetooth headphones it is paired with. Neither product here works that way: the KZ ZAS Pro connects over a 3.5 mm wired jack, and the Bolanle P2 is a corded amplifier running on USB-C or AAA power. There is no Bluetooth pairing step, so no iOS battery readout applies.
how to check headphones
Start with the connection. The KZ ZAS Pro uses a standard 3.5 mm wired jack and a detachable cable, so reseat the cable at both ends first. The Bolanle P2 takes XLR balanced or 1/4" TRS input, so confirm you are on the right input and that the stereo/mono switch is where you want it.
how to check headphones mic
The KZ ZAS Pro 8-Driver is sold in a no-mic configuration, so there is no microphone to test — if you need to talk, this is not the model. The Bolanle P2 is an amplifier, not a headset, so it has no mic either; audio input comes from your console or interface via XLR or TRS.
As an Amazon Associate I earn from qualifying purchases.
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.
When you buy through links on this page, we may earn a commission from qualifying purchases at no extra cost to you.
Amazon and the Amazon logo are trademarks of Amazon or its affiliates. This site is an independent third-party review and is not affiliated with, endorsed by, or sponsored by Amazon or the product brands mentioned.
See also: Raycon Everyday vs Denon AH-C630W: Wireless Headphones Long, Global Teck Worldwide Evolve2 vs EPOS Impact 100, eppfun Professional vs Avantree Relay & SoundJet, LC-dolida Control Module vs ESSAGER Car Adapter