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Celestion TSQ1845 Ten Squared Series 18" Neodymium Subwoofer 8 Ohm

CelestionPart # 294-2504
Model: TSQ1845
4 Questions, 14 Answers or

Using Celestion's cutting-edge “Ten Squared Technologies,” the TSQ1845 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 TSQ1845 Ten Squared Series 18" Neodymium Subwoofer 8 Ohm

Celestion TSQ1845 18" 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: 18" Bass Reflex Enclosure Featuring the TSQ1845

Loudspeaker cabinet designer Bill Fitzmaurice has developed a bass reflex enclosure specifically for the Celestion TSQ1845, an 18"cast aluminum chassis neodymium magnet low-frequency driver. Built from 12mm plywood, the design maximizes performance while keeping the cabinet compact and lightweight.

The TSQ1845 features a 4.5" copper voice coil, delivering 3600W of continuous power and 97 dB sensitivity. As part of Celestion’s Ten Squared (TSQ) series, this 18" driver is precision-engineered and assembled in the UK to provide exceptional performance for the most demanding professional sound reinforcement applications.

Download the free cabinet design here

Product Details

BrandCelestion
ModelTSQ1845
Part Number294-2504
UPC739894639804
Unit of MeasureEach
Weight27.1

Product Specifications

Nominal Diameter18"
Power Handling (RMS)1800 Watts
Power Handling (MAX)3600 Watts
Impedance8Ω
Frequency Response30 to 1,000Hz
Sensitivity96.5dB 2.83V/1m
Voice Coil Diameter4.5"

Thiele-Small Parameters

Resonant Frequency (Fs)35Hz
DC Resistance (Re)5Ω
Voice Coil Inductance (Le)3.06mH
Mechanical Q (Qms)8.712
Electromagnetic Q (Qes)0.3
Total Q (Qts)0.29
Compliance Equivalent Volume (Vas)4.2ft³
Mechanical Compliance of Suspension (Cms)0.065mm/N
BL Product (BL)33.8T·m
Diaphragm Mass Inc. Airload (Mms)316g
Maximum Linear Excursion (Xmax)15mm
Surface Area of Cone (Sd)1134cm²

Materials of Construction

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

Mounting Information

Overall Outside Diameter18.1"
Baffle Cutout Diameter16.29"
Depth9.5"
# Mounting Holes8

Parts Express Staff Recommended Enclosure Volume

Sealed Volume0.508ft³
Sealed F3102.6Hz
Vented Volume1.168ft³
Vented F362.62Hz

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