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NEW Beyma 21LEX1600Nd LEX Series 21" Neo Subwoofer 8 Ohm

Beyma
Part #253-053

NEW Beyma 21LEX1600Nd LEX Series 21" Neo Subwoofer 8 Ohm

Beyma
Part #253-053  
Model: 21LEX1600Nd

The Beyma 21LEX1600Nd is a 21" low-frequency transducer designed for professional audio applications requiring high power handling, low distortion, and efficient Maltcross cooling. Its advanced design and robust construction make it suitable for both direct radiation and band-pass subwoofer configurations.

Key Features
  • 4" QUATTRO in/out copper voice coil enhances thermal performance​
  • Exclusive Maltcross cooling system reduces power compression​
  • Extended controlled displacement with ±14 mm Xmax​
  • 65 mm peak-to-peak excursion before damage ensures mechanical reliability​
  • Weatherproof cone with treatment on both sides for increased durability​
  • FEA-optimized neodymium magnetic circuit with aluminum demodulating ring for improved performance​
  • Ultra-low air noise design minimizes distortion​
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Overview

Beyma 21LEX1600Nd LEX Series 21" Neo Subwoofer 8 Ohm

21LEX1600Nd LEX Series 21" Neo Subwoofer 8 Ohm

The 21LEX1600Nd's 1,600 W AES power handling and 98 dB sensitivity enable it to deliver clear and dynamic sound output, making it suitable for demanding audio applications. Its 4" QUATTRO in/out copper voice coil enhances thermal stability, contributing to consistent performance over time. The exclusive Maltcross cooling system effectively dissipates heat, reducing power compression and maintaining consistent output during prolonged use. The driver features an Xmax of ±14 mm, allowing for extended linear cone movement and deeper bass response without distortion. With a peak-to-peak excursion before damage of 65 mm, the 21LEX1600Nd can withstand significant mechanical stress, ensuring longevity even under high-demand conditions. The weatherproof cone, treated on both sides, enhances durability and resistance to environmental factors, making it suitable for both indoor and outdoor applications. The FEA-optimized neodymium magnetic circuit, combined with an aluminum demodulating ring, improves overall efficiency and sound quality, while the ultra-low air noise design minimizes distortion. Optimized for direct radiation and band-pass subwoofer applications, this transducer offers versatility and high performance for professional audio systems.​

Solid Line: On Axis
Dotted Line: 45° Off Axis

At Beyma, the challenge of heat dissipation is met with a clear objective: ensuring our speakers consistently deliver optimal performance within the system, maximizing total sound pressure level (SPL) and maintaining stability.

It's widely recognized that a system's overall SPL decreases over time due to power compression effects in the speakers. Typically, larger voice coil diameters correlate with higher power capacity; however, this also necessitates bigger motor structures to achieve high total output from the transducer.

Beyma's Maltcross cooling technology presents multiple solutions to achieve this goal. It enables the woofer to handle higher power levels with a given coil diameter, allowing for designs with smaller coils and motor structures. This reduction in size decreases weight, increases sensitivity, and maintains adequate power handling for specific applications, resulting in a total SPL comparable to that of drivers with larger motor structures.

Maltcross technology incorporates a forced convection circuit within the driver's core, effectively lowering the coil's operating temperature. Additionally, it functions as a demodulation ring, linearizing the transducer's inductance.

Product Details

BrandBeyma
Model21LEX1600Nd
Part Number253-053
UPC8435469044333
Unit of MeasureEach
Weight31.5

Product Specifications

Nominal Diameter21"
Bolt Circle Diameter20.6
Power Handling (RMS)1600 Watts
Power Handling (MAX)3200 Watts
Impedance8Ω
Frequency Response30 to 1,000Hz
Sensitivity98dB 2.83V/1m
Voice Coil Diameter4"

Thiele-Small Parameters

Resonant Frequency (Fs)30Hz
DC Resistance (Re)5.4Ω
Voice Coil Inductance (Le)4.7mH
Mechanical Q (Qms)8.6
Electromagnetic Q (Qes)0.3
Total Q (Qts)0.29
Compliance Equivalent Volume (Vas)10.77ft³
Mechanical Compliance of Suspension (Cms)72mm/N
BL Product (BL)36.6T·m
Diaphragm Mass Inc. Airload (Mms)0.393g
Maximum Linear Excursion (Xmax)14mm
Surface Area of Cone (Sd)0.1734cm²

Materials of Construction

Cone MaterialPaper-Treated Paper
Voice Coil Wire MaterialCopper
Magnet MaterialNeodymium

Mounting Information

Overall Outside Diameter21.5"
Baffle Cutout Diameter19.4"
Depth10.6"
# Mounting Holes8

Parts Express Staff Recommended Enclosure Volume

Sealed Volume1.297ft³
Sealed F388.13Hz
Vented Volume2.992ft³
Vented F353.76Hz

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