W 300 S - 8 Ohm

30 cm (12") HiFi woofer with powerful drive, extended rear pole plate and long stroke surround. 50 mm voice-coil for high power handling. Very suitable for large 3-way and 4-way combinations and for high power handling subwoofers. Recommended cabinets: Volume/Principle BR-Channel fb 70 l/bass reflex 2 x BR 15.34 36 Hz 100 l/bass reflex 2 x BR 15.34 (length 12 cm) 32 Hz 1 x BR 25.50 (length 7 cm) 150 l/bass reflex 2 x BR 15.34 (length 7 cm) 29 Hz

No longer available

Rated power	150 W
Maximum power	200 W
Nominal impedance Z	8 Ohm
Frequency response	fu–4200 Hz
(fu: Lower cut-off frequency depending on cabinet)	.
Mean sound pressure level	92 dB (1 W/1 m)
Excursion limit	+/−14 mm
Resonance frequency fs	23 Hz
Magnetic induction	1.1 T
Magnetic flux	1400 µWb
Height of front pole-plate	8 mm
Voice coil diameter	50 mm
Height of winding	18.5 mm
Cutout diameter	280 mm
Net weight	4.5 kg
D.C. resistance Rdc	6.7 Ohm
Mechanical Q factor Qms	1.65
Electrical Q factor Qes	0.42
Total Q factor Qts	0.33
Equivalent volume Vas	340 l
Effective piston area Sd	507 cm²
Dynamically moved mass Mms	57 g
Force factor Bxl	11.0 Tm
Inductance of the voice coil L	1.8 mH

Rated power

150 W

Maximum power

200 W

Nominal impedance Z

8 Ohm

Frequency response

fu–4200 Hz

(fu: Lower cut-off frequency depending on cabinet)

Mean sound pressure level

92 dB (1 W/1 m)

Excursion limit

+/−14 mm

Resonance frequency fs

23 Hz

Magnetic induction

1.1 T

Magnetic flux

1400 µWb

Height of front pole-plate

8 mm

Voice coil diameter

50 mm

Height of winding

18.5 mm

Cutout diameter

280 mm

Net weight

4.5 kg

D.C. resistance Rdc

6.7 Ohm

Mechanical Q factor Qms

1.65

Electrical Q factor Qes

0.42

Total Q factor Qts

0.33

Equivalent volume Vas

340 l

Effective piston area Sd

507 cm²

Dynamically moved mass Mms

57 g

Force factor Bxl

11.0 Tm

Inductance of the voice coil L

1.8 mH

UNI-SUB 30

The UNI-SUB 30 employes two W 300 S - 8 Ohm on the push-pull principle. These are screwed back-to-back to the baffle and one woofer is assigned to each stereo channel. The results are worth listening to. The frequency graph shows the high level of efficiency and the almost ideal bandpass characteristics of this subwoofer. This is connected directly in parallel to the stereo speakers whose bass needs boosting. For this reason it is important that the impedance curve of the subwoofer does not too fall to too low levels as otherwise the booster might be overloaded. Nevertheless, one should be careful with low-impedance speakers and amplifiers without protective circuitry (very rare today) not to set the volume too high.

The tonality of this universal subwoofer can be described as precise and very dynamic and is particularly well suited to reproducing high output levels.

The high efficiency of the UNI-SUB 30 supports medium sized speakers in the bass and low bass range and this gives the music its live feel.

Volume/Principle	BR-Channel	fb
70 l/bass reflex	2 x BR 15.34	36 Hz
100 l/bass reflex	2 x BR 15.34 (length 12 cm)	32 Hz
1 x BR 25.50(length 7 cm)
150 l/bass reflex	2 x BR 15.34 (length 7 cm)	29 Hz

W 300 S - 8 Ohm

Used in / Accessories:

UNI-SUB 30