Product Overview
This document provides detailed information for the DS18 PRO-TW120, a 1-inch voice coil aluminum super tweeter featuring a bullet-shaped horn. It is designed for high-frequency audio reproduction.
The product is marked with a seal indicating it was "DESIGNED & ENGINEERED IN USA".
Model: PRO-TW120
Brand: DS18
Technical Drawings and Dimensions
The following diagrams illustrate the physical dimensions and layout of the PRO-TW120 tweeter.
Top View Diagram: This view shows the circular face of the tweeter. Key dimensions include an overall diameter of 3.14 inches (80 mm). A removable adapter ring is present, with an overall width of 3.77 inches (96 mm). The required cutout diameter for mounting is 3.3 inches (84 mm). A smaller dimension of 0.17 inches (4.50 mm) is also indicated, likely for screw holes or mounting features.
Side View Diagram: This view illustrates the tweeter's profile and depth. The overall depth of the unit is 1.96 inches (50 mm). The mounting depth, which is the distance from the mounting surface to the back of the tweeter, is 1.65 inches (42 mm). When using the adapter ring, the mounting depth is reduced to 1.37 inches (35 mm). Other indicated dimensions are 0.47 inches (12 mm) and 2.83 inches (72 mm) for the cutout diameter.
Performance Graph
The graph below displays the Sound Pressure Level (SPL) versus Frequency response for the PRO-TW120 tweeter.
SPL vs Frequency Graph: This graph plots Sound Pressure Level (SPL) in decibels (dBSPL) on the left Y-axis (ranging from 55 to 110 dB) against Frequency in Hertz (Hz) on the X-axis (ranging from 50 Hz to 20 kHz). The right Y-axis shows phase in degrees. The plotted curve indicates the tweeter's sensitivity, showing a general trend of increasing output from approximately 2 kHz upwards. It reaches a peak sensitivity above 100 dB in the 5 kHz to 10 kHz range and then gradually decreases towards 20 kHz. The graph is labeled with "LMS".
Specifications
| Specification | Value |
|---|---|
| Nominal Diameter | 3" |
| Nominal Impedance | 4 OHMS |
| AES Power Handling | 60W |
| Program Power Handling | 120W |
| Peak Power Handling | 240W |
| Sensitivity (1w/1m) | 103dB |
| Frequency Response | 2 Khz - 20 KHz |
| Recommended Hi Pass Crossover | 3 KHz |
Motor Details
| Motor Component | Material / Specification |
|---|---|
| Voice Coil Diameter | 1" / 25.4 mm |
| Voice Coil Former Material | CCAW |
| Winding Material | Aluminum |
| Diaphragm Material | Aluminum |
| Magnet Material | Ferrite |
| Magnet Weight | 6.5 Oz |
| Body Material | Aluminum |
Measurements
| Measurement | Value |
|---|---|
| Overall Width | 3.14" / 80 mm |
| Overall Depth | 1.96" / 50 mm |
| Cutout Diameter | 2.83" / 72 mm |
| Mounting Depth | 1.65" / 42 mm |
| Adapter Ring Overall Width | 3.77" / 96 mm |
| Mounting Depth with Adapter Ring | 1.37" / 35 mm |
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