• Home
  • Tectonic TEBM46C20N-4B BMR 3" Full-Range Speaker 4 Ohm

Tectonic TEBM46C20N-4B BMR 3" Full-Range Speaker 4 Ohm

Tectonic
Part #297-2157

Tectonic TEBM46C20N-4B BMR 3" Full-Range Speaker 4 Ohm

Tectonic
Part #297-2157  
Model: TEBM46C20N-4B
The TEBM46C20N-4B 3" full-range from Tectonic offers extremely flat response from 200 to 20,000 Hz. It is an ideal driver for compact audio applications that require a full-range, high performance acoustic solution.
Key Features
  • Bending-wave technology and pistonic modes of operation improve high frequency response
  • Flat diaphragm increases dispersion for better off axis response
  • Less than 1.375" deep for mounting in extremely shallow locations
  • 2.67" across for close center-to-center spacing in line arrays
Your Price: $19.98
MSRP: $68.99
Save $49.01 (71%)
Bulk Pricing
Quantity:Qty: 1-3 $19.98/ea
Quantity:Qty: 4+$17.98/ea

Back-Ordered

Estimated back in stock 5/8/2025
Alert Me When Available
Free Shipping available on orders over $99.00 in the US. Details
60 Day No Hassle Return Policy

Overview

Tectonic TEBM46C20N-4B BMR 3" Full-Range Speaker 4 Ohm

The Tectonic TEBM46C20N-4B 3" full-range speaker achieves the maximum amount of quality sound from small enclosure sizes. Aside from the benefits to acoustic engineers, the BMR's compact, square form factor also appeals to designers. BMR drive units can be a cosmetic feature of a product, or be integrated discreetly into designs—and potentially even hidden from view altogether. The technology's wide directivity enables flexible placement options, while the wide frequency response means BMR drivers can also deliver cost savings to engineers, since no crossover components or frequency-specific drivers are required. The TEBM46C20N-4B 3" drive unit has an extended frequency response with wide directivity and is ideally suited to compact full-range applications that require a high performance acoustic solution. Typical application examples include mp3 players, docking stations, and Internet/DAB (Digital Audio Broadcasting) radios, and home theater speaker bars.

Product Details

BrandTectonic
ModelTEBM46C20N-4B
Part Number297-2157
UPC848864018782
Unit of MeasureEach
Weight0.43

Product Specifications

Nominal Diameter3"
Bolt Circle Diameter2.95
Power Handling (RMS)20 Watts
Power Handling (MAX)40 Watts
Impedance4Ω
Frequency Response150 to 20,000Hz
Sensitivity86dB 2.83V/1m
Voice Coil Diameter1.26"

Thiele-Small Parameters

Resonant Frequency (Fs)170Hz
DC Resistance (Re)3.94Ω
Voice Coil Inductance (Le)0.03mH
Mechanical Q (Qms)15.16
Electromagnetic Q (Qes)0.47
Total Q (Qts)0.46
Compliance Equivalent Volume (Vas)0.011ft³
BL Product (BL)4.49T·m
Diaphragm Mass Inc. Airload (Mms)2.26g
Surface Area of Cone (Sd)19.6cm²

Materials of Construction

Cone MaterialPaper
Surround MaterialRubber
Basket / Frame MaterialPolymer
Magnet MaterialNeodymium

Mounting Information

Overall Outside Diameter2.67"
Baffle Cutout Diameter2.36"
Depth1.36"
# Mounting Holes4

Parts Express Staff Recommended Enclosure Volume

Sealed Volume0.012ft³
Sealed F3297.8Hz
Vented Volume0.02ft³
Vented F3140.1Hz

Specifications

Q&A

Reviews

Manuals & Resources

MONSTER DEAL

OF THE WEEK

$34.98 EACH
SAVE 22%
Lepai LP-168HA 2.1 2x40W Mini Amplifier + 1x68W Sub Output
California Prop 65

WARNING: Cancer and Reproductive Harm

www.P65Warnings.ca.gov