LSK C4s Centre Channel Speaker Kit



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Please note: this is a kit. Images of finished speakers are for example only.

Want sound quality which far outweighs the price?

Then you need our C4S centre channel speaker kit. As with our other compact speakers, the C4S is a great starter kit and a fantastic introduction to DIY audio. Suitable for multiple applications, our C4S works particularly well as a centre channel in any surround sound or home theatre scenario, and it's a perfect match for the other speakers in out 4" kit range. C4S can also be used in stereo configuration as an MTM (Mid - Tweeter - Mid) pair.

We engaged one of the most respected high end loudspeaker designers in Australia to redesign our kit range. Now everyone can enjoy high end performance at very affordable prices. As with the rest of our 4" series, we've had drivers made specifically for these kits and have used high quality crossover components from trusted brands. The 4" series performs well above its price point and rivals much more expensive equipment.



  • The 5 channel bundle inclues four M4S speaker kits and one C4S speaker kit
  • The 7 Channel bundle inclues six M4S speaker kits and one C4S speaker kit
  • To buy multiple C4S kits or a stereo pair for MTM configuartion just add two or more C4S kits to your cart

The applications the M6 best suits are:

  • Centre speaker in home theare (HT).
  • MTM (Mid - Tweeter - Mid) stereo configuration
  • PC Audio applications (Centre or MTM)
  • Bookshelf Speakers (MTM)

Included in the C4S Mk1 speaker kit:

  • 2 x 4½” Woofers (SB12PFC25-8)
  • 1 x ¾” Tweeters (SB19ST-C000-4)
  • 1 x Crossover Network
  • 1 x Round input Terminal
  • 6 x Panels CNC machined 12mm MDF panels
  • 1 x CNC machined 12mm MDF grille frame
  • 1 x Grille cloth (205mm W x 475mm L)
  • 32 x Self tapping Screws (18mm length)
  • 8 x Self tapping Screws (12mm length)
  • 2 x 25mm Tuning Ports
  • 1 x Piece of Acoustic Lining (120mm W x 720mm L)


View PDF Assembly Instructions
YouTube Assembly Guide





 Model  C4S
 Tweeter  ¾” SB Acoustics SB19ST-C000-4
 Woofer  4½” SB Acoustics woofers SB12PFC25-8
 Frequency Response  60 Hz - 20 kHz
 Impedance (nominal)  16 ohm
 Sensitivity (2.83V)  86 dB
 Power handling (AES)  60W
 Power handling (program)  120W
 Recommended amplifier  30 - 120W
 Dimensions (mm)  
 Width  417 mm
 Height  145 mm
 Depth  220 mm (excluding 12mm grille)
 Weight  5 kg













Frequency response



Power handling specs explained


AES power handling represents the ability of the speaker to handle a continuous 2 hour pink noise signal with bass content limited. Program power is a higher rating due to the fact that music isn't a constant signal. We specify a suggested power range for your amplifier which should suit most people. However, it should be noted that this provides no certainty that a speaker can't be over driven and fail. Our warranty does not cover speaker damage due to abuse. Content with large amounts of low bass can push woofers beyond their excursion limits. Extended listening at high levels can result in driver failure due to thermal stress. This is not covered by warranty.



SKU c4mk1
Model # LSK-C4S
Brand LSK
Shipping Weight 5.7500kg
View PDF Assembly Instructions
YouTube Assembly Guide

Warranty Policy

Product Warranty 

All LSK speaker kits are covered under a 3 year warranty. Warranty coverage includes manufacturers’ defects on all components such as woofers, tweeters and crossover circuits. Damage to speakers is usually caused by an underpowered amp which is clipping due to being driven too hard. Damage to speaker drivers and kit components caused by over-driving the amplifier or the speaker is not covered by warranties*.

Satisfaction Guarantee

If you purchase a kit from us and are not absolutely satisfied with the sound quality then you can return it to us within 14 days for your money back (this applies to kits only). All you pay is the freight cost back to us provided the components are in as-new condition and you have kept the original packaging. You must return the cabinets as well even if these have been partly or completely assembled.

The Box Build Warranty 

We are certain that you will find the cabinets that are supplied with our kits easy to build and of an excellent fit and finish. If, however, you are not absolutely happy with the finish you have obtained, you can return the cabinet to us and we will supply you with a replacement cabinet at a nominal price.

* Suggested amplifier power ratings in our specifications are nominal only. There is a wide range of factors which impact the performance and suitability of any speaker/amplifier matchup. In general, kits from M4 upward will suit most commonly available Home Theatre DD/DTS receivers.

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