Customer Service: 01308 898 763
  • Features:
    • Coated Plastic Cone
    • Double low loss mirrored rear suspensions
    • Diecast aluminium vented chassis
    • Extended pole piece magnet design
  • Benefits:

    The BM165.1 (6.5") is a critically doped plastic HIPS cone drive unit, developed for bass/mid applications that require minimal colouration and low distortion over a wide frequency range.

    It uses a symmetrical field magnet system with an extended pole piece for large linear excursion capability, along with mirrored double rear suspensions that guarantee transient stability at high drive levels.

    The Thiele-Small parameters are optimised for relatively small enclosures to give a bass performance that complements the extended midband enabling excellent 2-way systems.

    The diecast aluminium chassis is vented below the suspensions to increase cooling airflow to the voice coil.

Specifications
  • Model Number: BM165.1
  • Nominal Diameter (mm): 165
  • Power Capacity (Watt AES): 100
  • Sensitivity (dB/watt/m): 88
  • Frequency Range (Hz): 50-3000
  • Impedance (Ohms): 8
  • Voice Coil Diameter (mm): 38
  • Voice Coil Material: Copper
  • Suspension: Mirrored Double
  • Cone Material: Coated Black HIPS
  • Surround: Low Loss Rubber
  • Maximum Excursion (mm):  24 (before damage)
  • Magnet: Ferrite
  • Magnet Assembly Weight (Kg): 1.55
  • Volume Displaced (litres): 0.7
  • Connection: 5mm solder terminals
  • Chassis: Diecast Aluminium Vented
Mounting Information
Parameter Measure Unit
Overall Diameter 189 mm
Mounting Bolt Circle Diameter 178.5 mm
Number and Size of Bolts 4 M5
Baffle Cutout Diameter 160 mm front mount
Baffle Cutout Diameter 163 mm rear mount
Depth 84 mm below front flange
Depth 90 mm total depth
Weight  1.95 Kg

Response Curve

Thiele-Small Parameters
Parameter Measure Unit
Fs 30 Hz
Re 5.5 Ohms
Qms 4.12
Qes 0.26
Qts 0.24
Cms 1.23 mm/N
Mms 25 grams
Bl 9.8 N/A
VAS 40.75 litres
Sd 153.94  cm²
Vd  96.98 cm³
Le 1.20 mH
Xmax ±6.3 mm

*T&S Parameters measured in free space after a preconditioning period of 2 hours.

Suggested Enclosures
Volume(litres) Vent Diameters(cm) Vent Length(cm) System Q -3db freq(Hz)
12 3.2 6 7 50
20 3.2 5 7 40
25 3.2 5 7 35

Factsheet PDF

pdf


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