SERENE Sub-Chassis for LP12
The sub-chassis is a vital component in the LP12, suspended from the top plate and attached to the arm board. It is critical that the sub-chassis and arm board are perfectly flat to ensure correct alignment of the tonearm and spindle.
The original LP12 sub-chassis was made from 1.2mm steel which can warp over time leading to alignment issues. Later versions like the Majik, Kore and Keel are stiffer with improved sonic performance.
Linn and other third party LP12 sub-chassis tend to be made from metal, which can be stiff if designed properly. However, metal naturally resonates which is often employed for good effect, as in a cymbal for example. In our view a requirement of good turntable design is to prevent resonance and vibration from reaching the stylus. It is true that in some cases resonance can add certain sound characteristics which people like, and it is undoubtedly true that the LP12 has a distinct sound loved by many.
This presented us with a highly complex engineering challenge. For the Stack Audio SERENE upgrades, we wanted to reduce vibration that masks musical detail but still retain the core organic sound of the LP12. Enhancing the characteristics of the Sondek is a complex balancing act - quite literally
Stack Audio Approach
For the SERENE LP12 upgrades we first looked at the material. We chose Solid Surface for the sub-chassis which is a composite of acrylic, aluminium and other minerals. Solid Surface is our building block; it has the sound characteristics we like from metal whilst resonating a great deal less.
Choosing the material was the easy part. Ensuring the Solid Surface SERENE SubChassis retained the same mass and balance as the original was essential. Countless prototypes, vibration modeling and listening sessions led to our final design. We use a honeycomb structure to ensure maximum strength with varying pocket depths to tune and balance the SERENE LP12 Sub-Chassis, ensuring it works perfectly with the LP12 suspension.
SERENE Sub-Chassis Design
The Stack Audio SERENE Sub-Chassis can be used with the original and other LP12 arm boards. However it performs at its very best when used with one of the matching SERENE Arm Boards. These are available in 6 standard fittings and custom cut-outs to special order.
Testimonial from Ross B in Wales:
In terms of sound quality there are huge improvements, top end is clearer and more detailed and lower registers are much more defined and bass hits you in the chest!
Key Features of the Stack Audio SERENE Sub-Chassis
- Precision machined in the UK from Solid Surface ensures it will not warp over time
- Honeycomb structure to underside ensures mass and center of balance work perfectly with LP12 suspension
- Resonates far less than metal alternatives, enhancing the organic sound of the LP12
- Fits with all standard arm boards and Solid Surface SERENE Arm Boards
- Works with both a standard bearing and the Cirkus bearing (with an adapter supplied free on request)