Micro Precision 7.8 7-Series 3.5 inch wideband midrange speaker

Micro Precision 7.8 Wideband - 3.5" Pair

The Micro Precision 7.8 is a 3.5-inch wideband driver designed for natural, detailed sound from a compact speaker location while pl. It features a lightweight paper cone, non-inductive glass-fiber voice coil, and matched-pair selection.

$899.00 $999.00

Micro Precision 7.8 3.5-Inch Wideband Speaker

The Micro Precision 7.8 is a compact wideband driver developed to complete the 7-Series three-way speaker lineup. It is designed to reproduce the midrange and upper frequencies from a single speaker, making it suitable for high-end automotive systems where a separate midrange and tweeter may not be practical.

Its lightweight paper cone and non-inductive glass-fiber voice coil help keep moving mass low, allowing the driver to respond quickly while maintaining a natural and detailed tonal character.

Wideband Frequency Response

The 7.8 is designed to operate from approximately 120Hz through the upper frequencies. Micro Precision rates its response at 120Hz to 12,000Hz within ±2.5dB, with additional extension above that range.

This wide operating bandwidth allows the 7.8 to cover much of the audible spectrum from a single speaker location. Reducing the number of drivers reproducing the midrange and high frequencies can also simplify system integration and crossover design.

Lightweight Paper Cone

Micro Precision uses a lightweight paper membrane chosen for its balance of low mass, rigidity, and natural damping.

The cone is paired with a 15mm non-inductive glass-fiber voice coil. This construction helps reduce stored energy and inductive behavior while supporting clear, controlled reproduction throughout the driver’s operating range.

Flexible Installation

The 7.8 can be installed in enclosures starting at approximately one liter or used in an infinite-baffle installation.

Micro Precision recommends high-passing the driver at or above 120Hz. The manufacturer’s basic recommendation is a 120Hz crossover using a 6 or 12dB-per-octave slope, although the final crossover should be selected according to the installation, listening level, and system design.

Each set is supplied as a matched pair selected according to resonant frequency and impedance-curve measurements.

Key Features

3.5-inch wideband speaker
Lightweight paper cone
Non-inductive glass-fiber voice coil
15mm voice coil diameter
89dB sensitivity at 2.83V
8-ohm nominal impedance
30-watt power handling
Recommended high-pass filter of 120Hz or higher
Suitable for enclosures starting at approximately one liter
Compatible with infinite-baffle installations
Supplied as an individually matched pair

Technical Data

Specification	Details
Speaker Type	3-inch Wideband Speaker
Configuration	One-way Wideband
Continuous Power Handling	30 Watts
Maximum Power Handling	60 Watts
Voice Coil Diameter	15 mm
Frequency Response	120 Hz – 20,000 Hz
Sensitivity	89 dB
DC Resistance (Re)	6.5 Ohms
Resonant Frequency (Fs)	150 Hz
Xmax	±2.2 mm
Compliance (Vas)	1.21 L
Total Q (Qts)	0.7
Mechanical Q (Qms)	3.2
Electrical Q (Qes)	0.9

Physical Specifications

Specification	Details
Mounting Diameter	75 mm
Mounting Depth	50 mm
Weight	1.08 kg
Quantity	Pair (2 speakers)

Speaker Type: 3.5-inch Wideband Speaker
Outer / Mounting Diameter: 75 mm (2.95")
Mounting Depth: 50 mm (1.97")
Weight: 1.08 kg
Membrane: Blue-Power fiber membrane

Basket: Cast and machined magnesium
Surround: Rubber
Spider: Progressive pure textile
Quantity: 2 speakers per pair

Product description