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Celestion TSQ2145 Ten Squared Series 21" Neodymium Subwoofer 8 Ohm

CelestionPart # 294-2520
Model: TSQ2145

Using Celestion's cutting-edge “Ten Squared Technologies,” The TSQ2145 is unrivaled in terms of efficiency, longevity, durability, and quality. With an impressive 1,800W RMS power handling capacity and a lightweight neodymium magnet, this subwoofer is engineered for high-impact, professional-grade sound.

Key Features

  • Double-sided weatherproof cone for maximum durability
  • High efficiency cooling for improved performance, endurance and longevity
  • Lead out wires woven through suspension to reduce fatigue from regular use
  • Proprietary tech for winding the voice coil gives Celestion drivers greater longevity
  • Precision Tuned Venting (PTV) increases airflow to keep the driver significantly cooler than other leading brands
  • Dual suspension with a layer of Polysiloxane in-between reduces stiffness
  • Engineered and built in the United Kingdom
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Overview

Celestion TSQ2145 Ten Squared Series 21" Neodymium Subwoofer 8 Ohm

Celestion TSQ2145 21" Neodymium Subwoofer

Ten Key Features that add up to a new standard in LF driver performance

The Ten² development initiative meticulously reexamined every aspect of driver design, implementing and validating a series of progressive refinements. These cumulative enhancements work together to set a new benchmark for performance and durability in professional low-frequency loudspeakers.

Precision Tuned Venting

Precision Tuned Venting (PTV) harnesses the cooling effects of constant airflow in a set of precisely dimensioned vents, enabling cooling around the coil and magnet assembly to be significantly improved – by up to 80C compared to conventional designs.

Reduced Power Compression

Highly efficient PTV cooling delivers additional reduction in power compression (loss of driver efficiency), as well as lower thermal stress on the voice coil, leading to improved performance, endurance and longevity.

Polysiloxane Laminated Dual Suspension

Polysiloxane (a silicone polymer) is sandwiched between two resin- impregnated layers which enables the laminated suspension to be worked much harder without losing stiffness, giving better coil control, making DC shift less likely and increasing speaker longevity.

Reconfigured Magnet Assembly For Greater Excursion

A re-configured magnet assembly allows much greater cone excursion before damage occurs (Xmech) and best-in-class Xprotection (the distance the coil and cone move, measured to the point where both Bl and Cms have both reduced to 30% of their resting value).

Convergent Motor Strength & Mechanical Compliance

Electrical motor strength Bl and mechanical compliance Cms reach their defined Xprotection limit at practically the same point: achieving a low distortion performance even during high excursion.

Custom Voice Coil Structure

Celestion winds its own voice coils using proprietary adhesion and voice coil structure solutions to maximize product lifespan and performance longevity.

Enhanced Moisture Protection

A water-based solvent is applied to one or both sides of the loudspeaker’s cone (depending on speaker model and desired application). This significantly improves the driver’s ability to resist direct exposure to water and higher levels of humidity, and also improves product durability.

Laser-Cauterized Lead Out Wire Holes

Weaving lead out wires into the suspension through laser cut holes reduces ‘whipping’ and lessens the fatigue on wires and joints caused by high power and cone excursion.

Multi-layer Inside/Outside Coil Windings

Celestion’s voice coils are wound inside/outside in multiple layers, to maximize cooling potential with the greatest amount of surface area exposed to free air. This further contributes to the reduction of both power compression and thermal stress.

Precision built in the UK

TSQ drivers are built on the newly-commissioned, robotically-assisted production line at Celestion’s UK-based loudspeaker research and manufacturing facility, and rigorously tested in line with an exacting list of performance criteria.

BUILD THIS: 21" Bass Reflex Enclosure Featuring the TSQ2145

Loudspeaker cabinet designer Bill Fitzmaurice has designed a bass reflex cabinet, specifically for use with the Celestion TSQ2145, a 21" cast aluminum chassis neodymium magnet low frequency loudspeaker. Constructed from 12mm plywood that’s supported by bracing, the design offers a more lightweight solution to 18mm plywood, while being as structurally sound as a cabinet made from 24mm.

The TSQ2145 driver has a 4.5" diameter copper voice coil, with a continuous power rating of 3600W and 97 dB/96.5 dB sensitivity. The TSQ2145 is the 21" model in the Ten Squared (TSQ) series of low frequency drivers, precision engineered and assembled in the UK to offer superior levels of performance in the most demanding professional sound reinforcement applications.

Download the free cabinet design here

Product Details

BrandCelestion
ModelTSQ2145
Part Number294-2520
UPC739894660402
Unit of MeasureEach
Weight32

Product Specifications

Nominal Diameter21"
Power Handling (RMS)1800 Watts
Power Handling (MAX)3600 Watts
Impedance8Ω
Frequency Response30 to 1,000Hz
Sensitivity97dB 2.83V/1m
Voice Coil Diameter4.5"

Thiele-Small Parameters

Resonant Frequency (Fs)30Hz
DC Resistance (Re)5Ω
Voice Coil Inductance (Le)3.91mH
Mechanical Q (Qms)8.393
Electromagnetic Q (Qes)0.359
Total Q (Qts)0.344
Compliance Equivalent Volume (Vas)8.96ft³
Mechanical Compliance of Suspension (Cms)0.065mm/N
BL Product (BL)33.8T·m
Diaphragm Mass Inc. Airload (Mms)435.2g
Maximum Linear Excursion (Xmax)15mm
Surface Area of Cone (Sd)1661.9cm²

Materials of Construction

Cone MaterialTreated Paper
Surround MaterialCloth
Voice Coil Wire MaterialCopper
Voice Coil FormerFiberglass
Basket / Frame MaterialCast Magnesium
Magnet MaterialNeodymium

Mounting Information

Overall Outside Diameter21.3"
Baffle Cutout Diameter19.88"
Depth9.84"
# Mounting Holes8

Parts Express Staff Recommended Enclosure Volume

Sealed Volume1.602ft³
Sealed F374.32Hz
Vented Volume4.136ft³
Vented F342.63Hz

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