hifiaf
pfm Member
I'm in the midst of a needlessly thorough comparison of various LP12 components, and so I found myself with three subchassis. I thought I would take as many measurements as I could, since I'm curious about these kinds of things.
Here's what they look like:
Linn Kore
Greenstreet for Aro (logo added by previous owner)
Mober for Rega.
First thing I measured was weight. They’re all quite similar in mass. The Kore is heaviest at 1102g, followed by the Greenstreet at 1033g, followed by the Mober at 1011g.
Next up: centre of gravity / balance point. I've indicated it in the following photos with a spot of blu-tack. The Mober and Greenstreet are in exactly the same spot, 14.3cm from the edge of the armboard; the Kore is further from the motor, 13.3cm from the armboard.
Kore
Greenstreet
Mober
Finally — most excitingly for me (I need to get a life!) — tap tone. I wasn't able to upload audio here, so you'll need to visit my blog here to hear them, or click on the links below.
The Kore is by far the least resonant. This is what it sounds like when you knock it with your knuckle while suspending it from a string: (sound here). Frequency analysis of this tone in Audacity suggests the Kore resonates at 407 Hz (G#4).
The Greenstreet rings much louder and longer (sound here). Audacity has it resonating at about the same frequency as the Kore: 415 Hz, also G#4.
The Mober rings loudest and longest (sound here), with a different frequency to the other two. Audacity has it at 699 Hz (F5).
See my blog post for more and larger photos, including screen grabs of the Audacity frequency analysis of each tap tone.
http://www.hifiaf.com/three-lp12-subchassis/
Thus ends a thorough treatment of a subject of very limited interest.
Here's what they look like:
Linn Kore
Greenstreet for Aro (logo added by previous owner)
Mober for Rega.
First thing I measured was weight. They’re all quite similar in mass. The Kore is heaviest at 1102g, followed by the Greenstreet at 1033g, followed by the Mober at 1011g.
Next up: centre of gravity / balance point. I've indicated it in the following photos with a spot of blu-tack. The Mober and Greenstreet are in exactly the same spot, 14.3cm from the edge of the armboard; the Kore is further from the motor, 13.3cm from the armboard.
Kore
Greenstreet
Mober
Finally — most excitingly for me (I need to get a life!) — tap tone. I wasn't able to upload audio here, so you'll need to visit my blog here to hear them, or click on the links below.
The Kore is by far the least resonant. This is what it sounds like when you knock it with your knuckle while suspending it from a string: (sound here). Frequency analysis of this tone in Audacity suggests the Kore resonates at 407 Hz (G#4).
The Greenstreet rings much louder and longer (sound here). Audacity has it resonating at about the same frequency as the Kore: 415 Hz, also G#4.
The Mober rings loudest and longest (sound here), with a different frequency to the other two. Audacity has it at 699 Hz (F5).
See my blog post for more and larger photos, including screen grabs of the Audacity frequency analysis of each tap tone.
http://www.hifiaf.com/three-lp12-subchassis/
Thus ends a thorough treatment of a subject of very limited interest.