Eighteen Sound 21NLW9601 4Ω

LF Driver

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Media

Eighteen Sound 21NLW9601 21 inch 4 ohm loudspeaker driver view 1

Eighteen Sound 21NLW9601 21 inch 4 ohm loudspeaker driver view 2

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Overview

LF Driver

Eighteen Sound 21NLW9601

Eighteen Sound 21NLW9601 is a 21" 4 ohm LF driver rated at 1800W RMS. The validated T/S data includes Fs 41Hz, Qts 0.32, Vas 123L, Xmax 14mm, sensitivity 96.1dB, plus 2327cm³ Vd and 124 EBP. bits tracks vendor pricing, datasheet links, simulator import data, and similar drivers from the same loudspeaker database.

Size

21"

Impedance

4Ω

RMS Power

1800W

Sensitivity

96.1dB

98.0dBmanufacturer; using T/S-derived value (1.9dB delta).

EBP

124

Vented alignment

V_d

2327cm³

Datasheet traces

Frequency and impedance curves traced from the manufacturer PDF.

2 curves

frequency response240 ptsp2medium

Curve provenanceInspect 2 traces

These plotted lines are Bits digitizations of manufacturer evidence, not new measurements. How provenance works

frequency response
Frequency response
Trace datasheet-response-trace-poc/v2
240 plotted pointsSource file SHA-256 4ddded965bcd…Medium confidence1,414 selected pixels of 2,037
Manufacturer datasheet, page 2
impedance
Impedance response
Trace datasheet-response-trace-poc/v2
240 plotted pointsSource file SHA-256 4ddded965bcd…Medium confidence1,736 selected pixels of 2,167
Manufacturer datasheet, page 2

T/S Parameters

Valid

Canonical

Fs41Hz

Qts0.32

Qes0.33

Qms10.6

Vas123.0L

Re3.0Ω

Le2.18mH

BL32.7Tm

Sd1662cm²

Mms450g

Xmax14.0mm

SPL96dB

Power1800W

Power Nominal1800W

Impedance4Ω

F Low31Hz

F High1800Hz

What this validation status means

Pricing & availability

Price definitions

No standard offers found

Check the manufacturer website for current pricing.

Use this driver

Open it in 00 Simulator, download it for your enclosure tool, or copy the specification values.

Files use canonical values. Required mechanical fields are derived only where the target format needs them.

Hornresp

.txt · Hornresp driver database

Driver file ready to place in Hornresp’s Drivers folder.

Download for Hornresp

WinISD

.wdr · WinISD driver editor

Native WinISD driver record with the required SI conversions.

Download for WinISD

BASTA!

.bastaelement · BASTA! loudspeaker simulator

Native BASTA! element file using its documented SI-unit fields.

Download for BASTA!

VituixCAD

.wdr · VituixCAD 2 Enclosure

A WinISD driver file that VituixCAD imports directly.

Download for VituixCAD

00 Simulator

Direct import · Web app

Start a new enclosure simulation with this driver already loaded.

Open in 00 Simulator

Copy spec sheet

Plain text · Clipboard

Copy the available values as a clean label-and-value list.

Dimensions & Physical

Weight13.5kg

Diameter545.0mm

Overall Depth250.0mm

Cutout Diameter492.0mm

Bolt Circle Diameter520.0mm

Similar Drivers

Size stays fixed. Tune the T/S ranges to change what counts as a match, or add a specific driver to compare it directly.

Eighteen Sound 21NLW9601 21 inch 4 ohm loudspeaker driver similar-driver reference

Reference

Eighteen Sound

21NLW9601

21"

Compare on

Matches sit inside every range. Size stays fixed automatically.

Q_ts

Q_es

V_as

L

X_max

mm

BL

Tm

5 active T/S params, plus size. Pin a driver to open a side-by-side comparison.

3 matches

Compare a specific driver

Added drivers stay at the front of the list, whatever the ranges say.

Eighteen Sound 21NLW9601C 21 inch 4 ohm loudspeaker driver similar driver

Eighteen Sound 21NLW9601 21 inch 8 ohm loudspeaker driver similar driver

Precision Devices