Focal Sopra - Reveal The Invisible
MASTERING THE CABINET AND CHOICE IF MATERIALS -
Sopra’s cabinet was designed in our cabinet-making facility in Bourbon-Lancy (Burgundy, France) using the same manufacturing process as for Utopia.
The 69mm sandwich-machined front panel uses the same principle as ‘Gamma Structure’ to provide inertia and damping. Its density gives it the inertia necessary to provide a stable mechanical reference for optimal definition.
The inside of the cabinet has no parallel side panels, and small Helmholtz resonators have been added to the lower section to prevent vertical standing waves.
We chose glass as the material for the base of the loudspeaker to provide floor coupling, using spikes, which enabled the fastest propagation time possible, thus eliminating all halo effects in the bass.
https://www.youtube.com/watch?v=8UGIMHQe1Vo Focal Sopra (YouTube video) - Reveal The Invisible
https://www.youtube.com/watch?v=Kl7S5j3Pw4g The making of Focal Sopra (YouTube video)
Focal. The spirit of sound.
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Rick @ Musicraft
No worries, I've seen the results of both methods magnified, that's why I scrub (with little force in both directions and slightly across, not too much as static will build)
Some dirt will be hard to see and stuck on but still bigger than the diameter of a groove. You just can't shift everything with a liquid only bath. Even the basic Knosti scrubs to a certain level to dislodge stubborn dirt.
Surely no problem with scrubbing pushing dirt into the grooves as you say if a simple bath of liquid removes all the dirt anyway? The scrubbing will be needed for filthy records, the vacuum doesn't collect all the loose dirt either. Scrubbing can only help enhance the process.
Nobody will introduce a new cleaner then tell you to introduce scrubbing into the process when all others are claiming a liquid bath is sufficient. Without scrubbing is going to be a huge improvement anyway.
Apologies for sounding conceited re advising you re do your vinyl.
Leben RS28CX Pre-Amplifier
Excellent condition standard unmodified specification
Original boxes and packaging
I have owned this for approximately 18 months
Comes with various different valves for rolling to personal taste.
2X RCA 6CG7
5X Sylvania 6CG7
2X Realistic Lifetime 6CG7
Tung Sol 5Y3WGT
The Leben is a fantastic preamp, beautiful build quality, very musical and enjoyable to listen to, and also has a superb quality phono stage. Below are two links one for a review from 6moons which perfectly sums up the Leben's capabilities, the other is for the leben website listing full details and specification. Loads more information available on Google.
I currently have the RCA 6CG7 clear top and Mazda 5Y3GB installed which I find to be the best combination. Due to the size of the Mazda 5Y3GB it is not possible to have the power supply lid fitted, with the Tung Sol installed or any other common 5Y3 there is no such problem.
I have a genuine reason for the sale which I will explain. I own One Thing Audio stacked ESL57 speakers I am using these with the Townshend Audio supertweeters and Rel Stentor subwoofer, both are integrated and working to the best of my ability with the ESL57. These are currently been driven by Psvane 845 mono amplifiers which should also be available for sale soon unless I decide to keep them as a backup. I uploaded a few older photos of these Psvane mono's and also a link below to the Grant Fidelity website for information, I will take some fresh photo's again at the time of sale, I have the genuine Melz 1578 6N8S and Sophia Electric Carbon princess as drivers for the amps, really nice.
I am sure that many people will understand what it is like when you have the audio bug badly, I can't think of anything better to waste, I mean invest your money in when you spend so much time listening to and enjoying music and manage to create that really special musical experience.
I have decided to go for a change to a Pure Sound L300 Preamp and four M845 mono amplifiers to drive the stacked quads, one mono amp for each ESL57.
Demo and collection of the RS28CX would be a pleasure as long as you have a good standing on the Wigwam site and are prepared for an unusual entrance to get inside my small upstairs listening room
It has taken a while for me to get settled and organise the system to play at its best in a less than ideal enviroment but with patience and decication especially to speaker positioning I would like to think this is now one of the best small room systems you are likley to hear.
Links to photo's below
There are two other pre-owned RS28CX for sale in Europe at the moment one is priced at £2800 the other £3000
I am selling for £2400 the price is firm, you can buy and sell this later without taking any loss.
Worldwide insured postage possible, please provide me with your address details for a quote.
I would be happy to answer any questions