Hisenior Mega5Est Bass+ 1DD 2BA 2EST Tribrid In-ear Monitors

HiSenior Mega5EST Bass+ Enhanced Edition – 1DD + 2BA + 2EST Tribrid IEM | 5dB Sub-Bass Boost, Harman-Tuned Power Limited Production Edition

The HiSenior Mega5EST Bass+ Enhanced Edition takes the award-winning Mega5EST and supercharges it for bass lovers with a targeted 5dB sub-bass boost while preserving the original's smooth, neutral foundation.

This limited-edition tribrid IEM (only 1000 units worldwide) features a five-driver hybrid setup per side: a custom 10mm air-pressure-relieved dynamic driver for thunderous, textured low-end, dual Knowles BA drivers for rich mids, and dual Sonion EST drivers for precise, airy highs. Tuned to the Harman target curve with enhanced sub-bass, it delivers deep rumble, punchy dynamics, controlled slam, and clear separation across frequencies—ideal for EDM, hip-hop, rock, and bass-heavy tracks without sacrificing midrange clarity or treble extension.

Key Features

• Five-driver tribrid configuration per side: 1 × 10mm custom DD (bass-focused with air-pressure relief) + 2 × Knowles BA (mids) + 2 × Sonion EST (ultra-highs for sparkle and extension up to 50kHz)
• Four-way integrated crossover – seamless driver synergy for low distortion (THD+N 0.5% ±0.1%), clean reproduction, and precise frequency integration
• 5dB sub-bass boost – thunderous rumble, enhanced texture, slam, and punch in sub-bass/mid-bass while keeping mids clear and highs detailed/air
• Harman reference tuning with sub-bass emphasis – powerful yet controlled lows, natural mids, and smooth, extended treble for immersive, fatigue-free listening
• Stunning limited-edition design: Black and red shells (glittery red faceplate on right, minimal black on left) for a unique, premium aesthetic with ergonomic comfort and strong isolation
• Flagship “MANTA” Type-6 Litz cable – 532-core UP-OCC silver-plated copper (coaxial braided) for ultra-clean transmission, enhanced clarity, and warmth; 0.78mm 2-pin detachable with 3.5mm termination
• Complimentary 3.5mm to 4.4mm adapter – 8-strand Litz braided for balanced upgrade options
• Premium “MANATEE” sheepskin leather case – soft, cushioned, luxurious protection with high-end feel
• Easy to drive: 24Ω impedance + 101dB/mW sensitivity; performs excellently from phones, dongles, DAPs, or amps

Sound Performance

The Bass+ edition elevates the original Mega5EST's smooth neutrality with visceral sub-bass depth and rumble that hits hard without bleed or muddiness. Mids remain natural and clear (great vocal presence), while Sonion ESTs provide precise, airy treble with excellent extension and sparkle. Reviewers note its powerful yet refined bass slam, good texture, dynamic punch, and overall coherence—making it a basshead-friendly tribrid that retains technical strengths like resolution, separation, and non-fatiguing highs.

Technical Specifications

• Driver Setup: 1DD + 2BA + 2EST (tribrid)
• Crossover: Four-Way Integrated
• Impedance: 24Ω
• Sensitivity: 101dB/mW
• THD+N: 0.5% ±0.1%
• Frequency Response: 10Hz – 50kHz
• Connector: 0.78mm 2-Pin Detachable
• Cable Termination: 3.5mm (with 3.5mm to 4.4mm adapter included)

What's in the Box?

• HiSenior Mega5EST Bass+ Enhanced IEMs (pair)
• Flagship “MANTA” 532-core UP-OCC silver-plated cable (3.5mm)
• Complimentary 3.5mm to 4.4mm Litz adapter
• Premium “MANATEE” sheepskin leather carry case
• Multiple ear tip sets (various sizes for fit & seal)
• User manual & accessories