Soundstream SPT.42 3.65" Pro Audio Super Bullet Tweeter (Pair)

Product Overview

The Soundstream SPT.42 is a 3.65-inch super bullet tweeter for custom audio installations. Its 3kHz–20kHz published response range and 4-ohm impedance help define where it fits in a multi-driver system. Use a suitable high-pass crossover to keep low-frequency energy away from the tweeter.

Key Features & Benefits

• Nominal speaker size: 3.65 inches

Technical Specifications

• 3.65-inch super bullet tweeter
• Published frequency response: 3kHz–20kHz
• Impedance: 4 ohms
• Aluminum diaphragm
• Mounting depth: 2.22 inches / 56.5mm
• Sold as a pair
• Published sensitivity: 105dB; measurement reference not specified on page
• Published cutout: 2.87 inches / 73mm; verify against physical driver before fabrication

Why Choose This Product?

The SPT.42 belongs in a dedicated high-frequency section with suitable filtering, not on an unrestricted full-range signal. Work through the physical installation and crossover arrangement as carefully as the power rating so the driver is used for the job it is designed to perform. For this model, the listed feature set includes Nominal speaker size: 3.65 inches. Check how that feature fits your intended system rather than substituting specifications from a similar model.

Installation & Compatibility Notes

Confirm mounting depth, cutout size and clearance before installation. Use suitable crossover filtering and match amplifier output to the manufacturer’s continuous-power guidance. Maximum or unspecified input-power figures are not interchangeable with an RMS rating.

Design and installation details

The Soundstream SPT.42 is a 3.65-inch super bullet tweeter for custom audio installations. Its 3kHz–20kHz published response range and 4-ohm impedance help define where it fits in a multi-driver system. Use a suitable high-pass crossover to keep low-frequency energy away from the tweeter.

• 3.65-inch super bullet tweeter
• Published frequency response: 3kHz–20kHz
• Impedance: 4 ohms
• Aluminum diaphragm
• Mounting depth: 2.22 inches / 56.5mm
• Sold as a pair
• Published sensitivity: 105dB; measurement reference not specified on page
• Published cutout: 2.87 inches / 73mm; verify against physical driver before fabrication

Check cutout, mounting depth, fastener clearance and the space behind the grille before modifying a panel. Protect terminals from contact with metal and use appropriate crossover filtering. Confirm the listing’s stated quantity when planning left/right coverage; a pair rating must not automatically be treated as a per-driver rating.

Frequently Asked Questions

What nominal size is the SPT.42?

Nominal speaker size: 3.65 inches. Nominal size is a starting point; cutout and mounting depth must be checked separately.

What frequency range is specified for the SPT.42?

Published frequency response: 3kHz–20kHz. Use a crossover appropriate to the driver and application; a published response range does not guarantee equal output across the entire range.

What impedance is specified for the SPT.42?

Impedance: 4 ohms. Match the total connected load to the amplifier, accounting for all drivers on the channel.

What depth clearance does the SPT.42 need?

Mounting depth: 2.22 inches / 56.5mm. Leave clearance for terminals and moving parts as well as the driver itself.

Is the SPT.42 a direct-fit replacement for my vehicle?

A shared nominal speaker size is not a vehicle-fit guarantee. Compare cutout, depth, mounting pattern and grille clearance; vehicle-specific mounting brackets or wiring adapters may be required.

Explore More

Compare Car Tweeters or read our Soundstream brand guide. Need help matching components? Contact 12 Volt Outlet with your vehicle, current equipment and installation goals.