Accuton AS250-8-552 Subwoofer 8 Ohm 1 piece

The Accuton AS250-8-552 is a 250mm diameter bass speaker with an aluminium honeycomb sandwich cone. The new design allows for an ideal acoustic center that is identical to Accuton's CELL tweeters and midrange drivers. The novel overhang design combines the advantages of traditional overhang and underhang designs to deliver high linear excursion with extremely low distortion. An extra-hard aluminum sandwich diaphragm was developed for the CELL bass drivers, allowing for very low delay and energy storage. The hidden centering reduces the overall outer diameter and allows a linear excursion of up to +/- 16 mm. A newly developed centering spider allows large excursion without compression.

.

Short Description:

25cm subwoofer with aluminum honeycomb sandwich cone.

It has a rear vented voice coil.

.

Mechanical data:

Overall diameter / front panel 250 mm

Hole cut-out 230 mm

Minimum front panel thickness 18 mm

overall height 141 mm

Magnet height 56.5 mm

Magnet diameter 210 mm

Screw holes Screws Din 7984 / Ø 4.50 Mm

Weight 23 Kg

.

Thiele-Small Parameters:

Sensitivity Lp 87 dB

Resistance (direct current) Re 7.3 Ohm

Free air resonance frequency Fs 22 Hz

Equivalent volume Vas 119 Ltr

Mechanical quality Qms 5.0

Electrical quality Qes 0.40

Overall quality Qts 0.38

Effective diaphragm area Sd 382 cm2

Moving mass Mms 92 Gr

Membrane stress compliance Cms 0.57 mm/N

Mechanical resistance Rms 2.52 Kg*S

-

Voice coil parameters:

Power handling P 300 Watt

Impedance 8 Ohm

Linear excursion Xmax +/-9 mm

Voice coil diameter 114 mm

Voice coil carrier material Ti

Conductor material Cu

Voice coil inductance Le 0.67 mH

Force factor Bl 14.8 N/A

Drive type Overhanging Ferrofluid In air gap No

-

Enclosure Recommendation Closed:

Vb: 30L, -9 dB @ 30 Hz, F -3 dB: 51 Hz, Q: 0.71 (default).

Vb: 80L, -7 dB @ 30 Hz, F -3 dB: 55 Hz, Q: 0.50 (extended bass)

-

Enclosure Recommendation Bass Reflex:

Vb: 60L, port diameter: 100 mm, length: 440 mm, Fres: 27 Hz, F - 3 dB:30 Hz, Q: 0.58 (optimum).

Vb: 80L, port diameter: 100 mm, length: 280 mm, Fres: 28 Hz, F - 3 dB:28 Hz, Q: 0.50 (extended bass)