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Tectonic TEBM65C20F-8 3-1/2" BMR Full-Range Speaker 8 Ohm

TectonicPart # 297-2156
Model: TEBM65C20F-8
For audio applications that require extended frequency response, and superior off-axis response in a small form factor, choose the Tectonic TEBM65C20F-8 3-1/2" full-range transducer. Nearly all of the audio in the pass band of the driver is available up to 100° off-axis.

Key Features

  • Amazing off-axis frequency response
  • Small form factor with decent Xmax
  • Perfect for modern speaker applications such as soundbars
Your Price: $19.98
MSRP: $54.99
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Estimated back in stock 7/15/2025
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Overview

Tectonic TEBM65C20F-8 3-1/2" BMR Full-Range Speaker 8 Ohm

Tectonic TEBM65C20F-8 Balanced-Mode Radiator (BMR) features extended frequency response and wide dispersion compared to that of a conventional drive unit. It combines the benefits of Tectonic Elements bending-wave technology and pistonic modes of operation. It is ideally suited for compact audio applications that require a full-range, high performance acoustic solution such as a soundbar. An advanced ferrite-based motor is combined with special cone dampers to ensure a small size that outperforms conventional drivers, especially in off-axis performance.

Product Details

BrandTectonic
ModelTEBM65C20F-8
Part Number297-2156
UPC844632098789
Unit of MeasureEach
Weight1.65

Product Specifications

Nominal Diameter3-1/2"
Power Handling (RMS)30 Watts
Power Handling (MAX)60 Watts
Impedance8Ω
Frequency Response60 to 20,000Hz
Sensitivity81dB 2.83V/1m
Voice Coil Diameter1"

Thiele-Small Parameters

Resonant Frequency (Fs)104Hz
DC Resistance (Re)7.1Ω
Voice Coil Inductance (Le)0.05mH
Mechanical Q (Qms)6.65
Electromagnetic Q (Qes)1.11
Total Q (Qts)0.95
Compliance Equivalent Volume (Vas)0.04ft³
Mechanical Compliance of Suspension (Cms)0.42mm/N
BL Product (BL)4.8T·m
Diaphragm Mass Inc. Airload (Mms)5.6g
Maximum Linear Excursion (Xmax)5mm
Surface Area of Cone (Sd)43.58cm²

Materials of Construction

Cone MaterialPaper
Magnet MaterialFerrite

Mounting Information

Overall Outside Diameter4.25"
Baffle Cutout Diameter3.25"
Depth2.125"
# Mounting Holes6

Parts Express Staff Recommended Enclosure Volume

Sealed Volume0.08ft³
Sealed F3100.8Hz
Vented Volume0.12ft³
Vented F373.9Hz

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WARNING: Cancer and Reproductive Harm

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