free shipping at parts express

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

Brand:|Model: TEBM65C20F-8|Part # 297-2156

For audio applications that require extended frequency response, and superior off-axis response in a small form factor, choose the Tectonic Elements 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.
In Stock
Your Price
Buy 4+$13.35
Part # 297-2156
  • Amazing off-axis frequency response
  • Small form factor with decent Xmax
  • Perfect for modern speaker applications such as soundbars

Product Details

Tectonic Elements TEBM65C20F-8 3-1/2" BMR Full-Range Speaker 8 Ohm
Tectonic Elements 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 Specifications
  • Nominal Diameter3-1/2"
  • Power Handling (RMS)20 Watts
  • Power Handling (max)40 Watts
  • Impedance8 ohms
  • Frequency Response80 to 20,000 Hz
  • Sensitivity81 dB 2.83V/1m
  • Voice Coil Diameter1"
Thiele-Small Parameters
  • Resonant Frequency (Fs)86 Hz
  • DC Resistance (Re)7.2 ohms
  • Voice Coil Inductance (Le)0.055 mH
  • Mechanical Q (Qms)4.9
  • Electromagnetic Q (Qes)1.09
  • Total Q (Qts)0.89
  • Compliance Equivalent Volume (Vas)0.04 ft.³
  • Mechanical Compliance of Suspension (Cms)0.65 mm/N
  • BL Product (BL)4.33 Tm
  • Diaphragm Mass Inc. Airload (Mms)5.25g
  • Maximum Linear Excursion (Xmax)3.5 mm
Materials of Construction
  • Cone MaterialPaper
  • Magnet MaterialFerrite
Mounting Information
  • Overall Outside Diameter4.25"
  • Baffle Cutout Diameter3.4"
  • Depth1.88"
  • # Mounting Holes6
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume0.1 ft.³
  • Sealed F384 Hz
  • Vented Volume0.2 ft.³
  • Vented F350 Hz
Tectonic Elements TEBM65C20F-8 3-1/2" BMR Full-Range Speaker 8 Ohm
  • BrandTectonic Elements
  • ModelTEBM65C20F-8
  • Part Number297-2156
  • UPC844632098789
  • Product CategoryMidrange / Midbass Drivers & Full-Range Speakers
  • Unit of MeasureEA
  • Product Rating
    (26 Reviews)
  • Weight1.6500 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.


Tectonic Elements TEBM65C20F-8 3-1/2" BMR Full-Range Speaker 8 Ohm
Parts Express FacebookParts Express TwitterParts Express YouTubeParts Express PinterestParts Express SpotifyParts Express Instagram
Live Chat Software