DS18 PRO-GM8.4B 8" Mid-Range Loudspeaker with Bullet

Owner's Manual

General Specifications

Specification	Value
Nominal Diameter	8" / 203.2mm
Nominal Impedance	4 OHMS
RMS Power Handling	190 Watts
MAX Power Handling	580 Watts
Sensitivity (1w/1m)	95dB
Frequency Response	80Hz-10KHz
Recommended Hi Pass Crossover	120 Hz
Configuration	Single / Unit

Motor Specifications

Motor Component	Details
Voice Coil Diameter	1.5" / 38.1mm
Voice Coil Former Material	Kapton
Winding Material	CCAW
Cone Material	Paper
Bullet Material	Red Aluminum
Surround Material	Cloth
Basket Material	Steel
Basket Color	Matte Black
Magnet Material	Ferrite
Magnet Weight	30 oz

Thiele & Small Parameters

Parameter	Symbol	Value
Equivalent Volume	Vas	18.39L / 0.64ft³
Free Air Resonance	Fs	92Hz
Mechanical Factor	Qms	11.5
Electrical Factor	Qes	0.715
Total Factor	Qts	0.673
Mechanical Mass	Mms	10.3g
Mechanical Compliance	Cms	0.286mm/N
BL Factor	BL	5.2
Voice Coil Inductance	Le	0.427mH
Cone Area	Sd	213.82cm²
DC Resistance	Re	3.2 ohm

Measurements

Measurement	Value
Overall Diameter	8.26" / 210mm
Overall Depth	3.46" / 88mm
Front Mount Baffle Cutout	7.2" / 183 mm
Mounting Depth	3.22" / 82mm
Motor Diameter	4.72" / 120mm

Diagram Descriptions

The product is the DS18 PRO-GM8.4B, an 8-inch mid-range loudspeaker featuring a red aluminum bullet tweeter. It is designed and engineered in the USA.

Dimensional Overview:

Overall Diameter: 8.26 inches (210mm)
Overall Depth: 3.46 inches (88mm)
Front Mount Baffle Cutout Diameter: 7.2 inches (183mm)
Mounting Depth: 3.22 inches (82mm)
Motor Diameter: 4.72 inches (120mm)
Basket Diameter: 7.2 inches (183mm)
Voice Coil Diameter: 1.5 inches (38.1mm)

Frequency Response Graph: The graph illustrates the Sound Pressure Level (SPL) in decibels (dB) versus Frequency in Hertz (Hz). The response curve indicates a general output range from 80Hz to 10kHz, with peak sensitivity around 95dB, showing strong performance in the mid-range frequencies.

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