i was unfamiliar with the Minus K BM-8 platform until reading Marc's post #122. This level of vibration suppression is very impressive, especially for a passive device. Does anyone have familiarity with the BM-8 and what is the cost?
Just discovered that the UK distribr for Minus K are 5 miles up the road from me
Aiming to audition from them the WS-4, in effect 24" square BM-1 isoln platform on it's own steel frame stand, $5500/£4500
This will give me a pretty instant answer as to whether this level of isoln (good to 0.5Hz vertical and horizontal) is something I really need
Will post results
Just discovered that the UK distribr for Minus K are 5 miles up the road from me
Aiming to audition from them the WS-4, in effect 24" square BM-1 isoln platform on it's own steel frame stand, $5500/£4500
This will give me a pretty instant answer as to whether this level of isoln (good to 0.5Hz vertical and horizontal) is something I really need
Will post results
Bruce, can you elaborate as fully as possible on the fussiness of the Minus K
Tbh, this is my main reservation of the product
W the Stacore Adv, Accurion/Halcyonics, Herzan, Speirs etc, there are no such considerations, they are "set up and good to go".
I gave to site my 6"x3" phono directly adjacent to the tt since I only have a 60cm tonearm wire, and my tt like all tts is assymetrically weighted, and at 30kg it falls close to the minimum of the 24kg-45kg wt range
What do I need to be considering re position and pre loading?
Bruce, the people I'll be demoing from will likely have no experience setting up a tt on the K, so I can make any practical suggestions to help them
At 30kg for my tt, I'll have to ask them to supply 15-18kg of additional weighted slab
Re positioning, if most of the weight of my tt is on the rear foot/btwn rear foot-arm pod, are we looking at positioning this zone closer to actual centre point of the K, or if not, where exactly?
And w additional wt off the tt ie seperate motor pod and seperate phono, these may alter final positioning too?
The WS-4 is in effect a BM-1 on dedicated stand, 24" X 22"
I'm certainly hoping it allows us to be able to site 20" X 15" overall footprint tt together w 6" X 3" phono
If it doesn't then the K no go for me since I cannot site my phono on a seperate tier (tonearm lead 24")
Sure Bruce, I could run a 20" BM-8 on a 25" rack and have phono to side off the MK
We have no real aftermkt specialist isoln mkt for tts in UK, so these guys are mainly lab-only orientated
I have MK factory-direct prices for comparison
So, w my tt being overall footprint 18"x15" w weight max at rear centrally-situated foot, and a few inches to the side of this rear foot is my seperate rim-drive motor pod, can you see any issues on a 20"x18" BM-8 platform?
And just yr thoughts on preloading w another 15kg to take up to max loading of the BM-8?
Bruce, I'm going to have the MK BM-8 a/b'd v the Herzan TS-150
MK will be preloaded w a 15kg top plate to get to max of wt range
Will test both platforms direct on the floor
![]() | Steve Williams Site Founder | Site Owner | Administrator | ![]() | Ron Resnick Site Owner | Administrator | ![]() | Julian (The Fixer) Website Build | Marketing Managersing |