GRS NRT25-8

8Ω

Miniature

Nominal diameter1″ / 39 mm
Resonance380 Hz
Q factor1.32
Sensitivity76 dB
Linear excursion± 2.5 mm
Program power10 W
GRS NRT25-8 MiniatureGRS NRT25-8 MiniatureGRS NRT25-8 Miniature
Impedance
Excursion
Velocity
SPL
Phase
Group delay
Step response
Tone Burst
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply

Specifications

  • Sensitivity (1W, 1m, infinite baffle) SPL1W 76dB
  • Frequency response 250 - 15000Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 380Hz
  • Mechanical quality factor QMS 2.41
  • Electrical quality factor QES 2.90
  • Total quality factor QTS 1.32

Large signal parameters

  • Maximum linear excursion (one way) xmax 2.5mm
  • Air volume displaced at xmax VD 0.9cm³
  • Power handling P 5W
  • Program power Pmax 10W

Voice Coil

  • Nominal impedance Z 8Ω
  • DC resistance RE 6.9Ω
  • Inductance (1kHz) LE 0.08mH
  • VC Diameter 20mm

Magnet

  • Force factor Bl 1.62N/A
  • Motor constant Bl/√RE 0.62N/√W
  • Material Neodymium

Diaphragm

  • Effective diameter 22mm
  • Effective area SD 3.8cm²
  • Moving mass (including air load) MMS 0.46g
  • Moving mass MMD 0.5g

Suspensions

  • Stiffness KMS 2.63N/mm
  • Compliance CMS 380µm/N
  • Equivalent volume to the compliance VAS 0.01L
  • Mechanical resistance RMS 0.46N·s/m

Dimensions

  • Nominal diameter 1″
  • 39mm
  • Overall diameter 39mm
  • Baffle cutout diameter 36mm
  • Overall depth 20mm
  • Flange thickness 1mm
  • Mounting depth 19mm
Impedance
SPL
GRS NRT25-8 Impedance
GRS NRT25-8 SPL
GRS NRT25-8 Dimensions
PDF fileDatasheet

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