DS18 PRO-GM8.4B 8-Inch Midrange Loudspeaker Owner's Manual

Product Overview

This document serves as the owner's manual for the DS18 PRO-GM8.4B, an 8-inch midrange loudspeaker designed with a bullet for enhanced sound projection. It is rated for 4 ohm impedance and is engineered and designed in the USA.

[Designed and Engineered in USA Seal]

Technical Drawings and Dimensions

Speaker Dimensions: The speaker features an overall diameter of 8.23 inches (209mm). The mounting depth is 3.19 inches (81mm), with an overall depth of 3.46 inches (88mm). The front mount baffle cutout required is 7.17 inches (182mm). The motor diameter is 4.72 inches (120mm).

SPL vs. Frequency Graph: This graph illustrates the Sound Pressure Level (SPL) in decibels (dBSPL) across a range of frequencies from 20 Hz to 20 kHz. The curve shows the speaker's output level at different frequencies, with an indication of off-axis sound dispersion in degrees (Deg). The response is generally flat in the midrange and treble frequencies, peaking around 2-3 kHz.

Specifications

Specification	Value
Nominal Diameter	8"
Nominal Impedance	4 OHM
RMS Power Handling	190W
Maximum Power Handling	580W
Sensitivity (1w/1m)	96dB
Frequency Response	90Hz-10KHz
Recommended Hi Pass Crossover	120Hz

Midrange Driver Details

Component	Material
Voice Coil Diameter	1.5"
Voice Coil Former Material	Kapton
Winding Material	KCCAW
Cone Material	Paper
Dust Cap Material	Paper
Bullet Material	Aluminum
Surround Material	Cloth
Basket Material	Steel
Magnet Material	Ferrite
Magnet Weight	30 oz

Thiele & Small Parameters

Parameter	Value
Vas (Equivalent Volume)	17.832L
Fs (Free Air Resonance)	110 Hz
Qms (Mechanical Factor)	7.857
Qes (Electrical Factor)	0.726
Qts (Total Factor)	0.665
Re (DC Resistance)	3.2 ohm

Measurements

Measurement	Value
Overall Diameter	8.23"/209mm
Overall Depth	3.39"/86mm
Front Mount Baffle Cutout	7.17"/182mm
Mounting Depth	3.11"/79mm
Motor Diameter	4.72"/120mm

More Information

For more information, please visit the DS18 website.

DS18.COM

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