PASpeaker-Base

B&C Speakers

B&C Speakers DE820TN

B&C DE820TN: 1.4″ compression driver with titanium diaphragm, 3″ voice coil and neodymium motor – the manufacturer recommends crossing over from 1.2 kHz.

Archived · Last checked: 2026-11-13

Share via …
Schematic cross-section: 1.4″ driver with neodymium motor Side section: on the left the motor with a compact neodymium magnet, pole piece and top plate with the air gap. The voice coil sits in the gap on its former, held by the spider. To the right the cone opens out with its dust cap, with the surround at the edge of the basket. The drawing shows the construction, not the dimensions of a particular model.
Schematic cross-section of a driver with a neodymium motor. The drawing shows the construction, not the dimensions of this model; the manufacturer has a product photo.

General data

Link to section “General data”
Type
Compression driver
Nominal size
1.4″
Nominal impedance
8 Ω Manufacturer
Minimum impedance
8.5 Ω According to the datasheet, this is above the nominal impedance of 8 Ω. Manufacturer
Sensitivity
107 dB 2.83 V, distance not stated · on horn B&C ME90 B&C states the voltage (2.83 V) and the measurement horn, but no measurement distance. Manufacturer
Frequency range
1,000 Hz – 18,000 Hz Manufacturer
Voice coil Ø
75 mm Manufacturer
Winding height
not available
Gap depth
not available
Flux density
1.85 T Manufacturer
Magnet
neodymium
Weight
2.2 kg Manufacturer
Baffle cut-out Ø
not available
Overall diameter
124 mm Manufacturer
Mounting depth
55 mm Manufacturer
Displacement
not available
Recommended enclosure volume
not available

Sensitivity is referenced to 2.83 V and was measured with the driver on the B&C horn ME90; a different horn gives a different value.

Throat diameter 36 mm (1.4″), titanium diaphragm, aluminium voice coil with 0.14 mH inductance (“Inductance 0.14 mH”). B&C recommends crossing over at 1.2 kHz with a high-pass of 12 dB/octave or steeper. The driver is fixed with four M6 bolts at 90° spacing on a 102 mm bolt circle. On the website the DE820TN is listed in the archive (“Archived”).

Thiele-Small parameters

Link to section “Thiele-Small parameters”

Small-signal parameters as stated by the manufacturer. They change with temperature and level.

Fs
not available
Re
not available
Le
not available
Qts
not available
Qes
not available
Qms
not available
Vas
not available
BL
not available
Mms
not available
Cms
not available
Sd
not available
Xmax
not available
Xdamage
not available
Vd
not available
EBP
not available
Efficiency η₀
not available

Power handling

Link to section “Power handling”
  • Continuous power (standard not stated)110 W
  • Programme power220 W

B&C tests rated power handling for two hours with pink noise in the range from the recommended crossover frequency to 20 kHz, referenced to the minimum impedance. Programme power (“Continuous Power Handling”) is defined as 3 dB above rated power handling – i.e. a calculated figure. For the recommended crossover point of 1.2 kHz, B&C requires a high-pass of at least 12 dB/octave.

Notes

Link to section “Notes”

Sources disagree

  • 1000–18000 Hz – Datasheet (PDF), p. 1, Specifications: “Frequency Range 1 kHz - 18 kHz” Adopted
  • 500–18000 Hz – Datasheet (PDF), p. 1, features: “500 - 18000 Hz response”

The same datasheet gives 500 Hz as the lower limit in the feature list and 1 kHz in the table. The table value is used because it fits the recommended crossover point of 1.2 kHz; the contradiction is not resolved.

Build plans with this driver

Link to section “Build plans with this driver”

Sources

Link to section “Sources”
  1. Tier A · primary source

    B&C Speakers DE820TN (8 Ω) – Datasheet (PDF) and Product page

    B&C Speakers S.p.A. · accessed on 13 November 2026

    The datasheet (3 pages) is generated by the manufacturer’s website via the “Download → Datasheet” button on the product page https://www.bcspeakers.com/en/products/hf-driver/archive/1.4/8/DE820TN. Values and footnotes match the product page. The document contains no issue date or revision. The product page carries the “Archived” label and is in the archive section of the website.

  2. Tier A · primary source

    F122AN Full Range Enclosure (build plan PDF)

    B&C Speakers · 16 June 2010 (Date from file metadata) · accessed on 13 September 2026

    File on the older B&C domain (old.bcspeakers.com/media/W1siZiIsIjIwMTkvMDUvMDkv…), whose TLS certificate had expired as of 2026-09-13. The current overview page is therefore linked instead.