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  2. Visaton AL 170 8 Ohm, 6.5 Inch, High-End Midrange Driver

Visaton AL 170 8 Ohm, 6.5 Inch, High-End Midrange Driver

AL 170 · 8 Ω · part 1302 — Product photo

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AL 170 · 8 Ω · part 1302 — Product photoProduct photo AL 170 · 8 Ω · part 1302 — Dimension drawingDimension drawing AL 170 · 8 Ω · part 1302 — Response and impedanceResponse and impedance AL 170 · 8 Ω · part 1302 — Directivity patternDirectivity pattern AL 170 · 8 Ω · part 1302 — Cumulative spectral decayCumulative spectral decay

Product photographs and manufacturer drawings. Images are not to scale.

AL 170 · 8 Ω · part 1302 — Product photo

Product photo

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Part number: 1302

A 17 cm aluminium-cone low-midrange driver for two-, three- and four-way high-end hi-fi systems.

Nominal size
17 cm / 6.5 inch
Impedance
8 Ω
Rated power
70 W
Cut-out
150 mm
Sensitivity
88 dB (1 W/1 m)
Resonance
38 Hz
ex VAT
£151.14 inc VAT
Maximum quantity available reached.

Stock and dispatch
Selected products are held in UK stock; other lines are sourced to order. Dispatch timing depends on the product and quantity.

Delivery information. Need it for a specific date? Ask us.

Quantity discounts

Description

The AL 170 pairs a stiff anodised aluminium cone with a cast aluminium basket and an elastic rubber surround, while a vented pole plate, vented damper and Kapton voice-coil former keep losses low. A long-stroke voice coil allows ±11 mm of excursion. This 8 Ω version takes 70 W rated power and resonates at 38 Hz.

Typical applications

  • Two-way hi-fi speakers
  • Three-way hi-fi speakers (bass/midrange)
  • Low-midrange in three- and four-way systems
  • High-end hi-fi systems
Full specifications
AL 170 · 8 Ω
Rated power70 W
Maximum power100 W
Nominal impedance8 Ω
Frequency response (−10 dB)fu–10000 Hz (fu: lower cut-off depends on the cabinet)
Mean sound pressure level88 dB (1 W/1 m)
Opening angle (-6 dB)51°/4000 Hz
Excursion limit±11 mm
Resonance frequency fs38 Hz
Magnetic induction1.1 T
Magnetic flux520 µWb
Height of front pole-plate6 mm
Voice coil diameter25 mm
Height of winding18 mm
Cut-out150 mm
Net weight1.2 kg
D.C. resistance Rdc5.6 Ω
Mechanical Q factor Qms3.88
Electrical Q factor Qes0.43
Total Q factor Qts0.39
Equivalent volume Vas34 l
Effective piston area Sd133 cm²
Dynamically moved mass Mms13 g
Force factor Bxl6.9 Tm
Inductance of the voice coil L0.9 mH
Terminals4.8 x 0.8 mm (+)/2.8 x 0.8 mm (-)
Dimensions and drawings
AL 170 · 8 Ω · part 1302 — Dimension drawing

Dimension drawing · Open original image

Installation and cabinet guidance

Allow a 150 mm panel opening for a 180 mm frame, with the fixing holes on a 168 mm circle and 4.3 mm holes countersunk to 8.3 mm. Behind the panel leave about 63 mm of clear depth for the basket and the 85 mm magnet, with room beyond that for the terminals and the wiring.

The driver weighs 1.2 kg, so use a rigid, well braced baffle with a continuous gasket or sealing strip between the frame and the panel, and tighten the fixings evenly and only enough to seal so the cast frame is not distorted. With ±11 mm of travel available, check that the cone and the rubber surround stay clear of the grille and of any internal bracing at full excursion. The terminals take 4.8 x 0.8 mm blades on the positive side and 2.8 x 0.8 mm on the negative, so blade size identifies polarity; observe it and use an amplifier or crossover suited to the 8 Ω load.

Visaton's published enclosure suggestions for this driver: 10 l closed (fc 79 Hz, Qtc 0.81); 20 l bass reflex with one BR 19.24 port cut to 13 cm (fb 43 Hz); 30 l bass reflex with one BR 19.24 port cut to 11 cm (fb 39 Hz).

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