The 603 S3 is the largest loudspeaker in the 600 Series and is ideal for larger rooms and home theaters. It combines our new Titanium Dome™ tweeter with the accuracy and transparency of our acclaimed Continuum™ cone FST™ midrange driver.

Layered, beautiful details
The new 603 S3 introduces our all-new Titanium Dome tweeter, which combines exceptional resolution and insight with smooth, refined high-frequency reproduction. The result? An accurate and immersive insight into your favorite music.
Truly amazing sound
603 S3 introduces our new and even more acoustically transparent tweeter grille mesh, first developed for our revered Signature models. Alongside the new Titanium Dome tweeter, the resolution and realism is exceptional.


Precision and transparency
Thanks to its composite construction, the Continuum cone avoids the abrupt transitions in behavior that can impair the performance of a conventional drive unit. With 603 S3, experience a more open, neutral performance that delivers voices and instruments with precision and transparency.
Upgraded speaker terminals
Derived from the speaker terminals recently introduced in our 700 Series range, the speaker terminals on the new 603 S3 feature an improved layout and a cleaner signal path between your amplifier and your loudspeakers.

Size & weight
Net weight
27.5kg (60.6 lb)
Dimensions
Height: 985 mm (38.8 in) cabinet only
1,020 mm (40.2 in) including plinth
Width: 190 mm (7.5 in) cabinet only
260 mm (10.2 in) including plinth
Depth: 340 mm (13.4 in) cabinet only
368 mm (14.5 in) including grille and terminals
402 mm (15.8 in) including plinth
Technical Details
Drive units
1x ø25mm (1 in) Titanium Dome high-frequency
1x ø150mm (6 in) Continuum cone FST midrange
2x ø165mm (6.5 in) Paper bass cone
Frequency range
-6dB 29Hz - 33kHz
Harmonic distortion
2nd and 3rd harmonics (90dB, 1m on axis)
<1% 100Hz - 22kHz
<0.5% 350Hz - 12kHz
Nominal impedance
8? (minimum 3.0?)
Recommended amplifier power
30W - 200W into 8? on unclipped programme
Technical features
Decoupled Double Dome Titanium tweeter
Continuum™ cone FST™ midrange
Paper bass cones
Flowport™
Description
3-way vented-box system
Max recommended cable impedance
0.1?
Frequency response (+/-3dB from reference axis)
46Hz - 28kHz ±3dB
Sensitivity (on axis at 2.83Vrms at 1m)
90dB
Finishes
Cabinet finishes
Black
White
Oak
Grille finishes
Black (Black)
Grey (White and Oak)