Galder turntable from Bergmann Audio, is Bergmann`s answer to the most universal turntable design.
Galder & Thor
In the Nordic Mythology, Galder means to enchant. A craft consisting of magic songs and spells. A master of practice Galder craft, was said to be able to raise storms, make distant ships sink, make swords blunt, make armour decide victory or defeat in battles. Odin, a master of magic, was a God with great abilities to “Galdre”.
Advantage of using air bearings
The platter is centered by a steel spindle, running in a very frictionless, low noise and hard wearing polymeric bearing material, and floats on a thin air cushion, which lower the mechanical bearing noise to an absolute minimum- if any. (A traditional bearing solution, which keep the platter centered AND support the platter weight, makes a higher level of mechanical bearing noise, as the contact point between spindle top and platter, generates a very high pressure – and hereby noise.)
By floating on an air cushion, the platter also gains the advantage of a very good isolation from the surroundings, same way as the known -and very expensive- air supported shelfs, used in many highend audio systems.
Also the speed stability benefit from the air supported platter. The musical flow is really extraordinary – not necessarily measurable but audible.
The plinth is made of one solid piece of cnc-machined die cast aluminium, as wel as the motorbase. Both parts with powder coated finish. The plinth is securely tightened to a 10mm aluminium bottom plate, which is standing on 3 adjustable feet. The feet is an aluminium and ceramic ball construction. 3 upper and smaller ceramic balls configured in a triangle, is standing on top of one bigger lower ceramic ball. No matter the feet position, the 3 upper ceramic balls will always have a perfect contact to the lower ceramic ball. The motor base is standing on the aluminium bottom plate –but decoupled – and will always be aligned with the plinth, no matter the feet position. On the back side of the plinth, the back panel is mounted. It consist of: Grounding, Air input, Vacuum input, output for an air bearing tonearm, and air adjustment valves for platter and tonearm.
The motorbase on Galder is equipped with a DC tacho motor. Communication between the tacho and the high precision motor control electronic, will keep the platter in a very accurate speed. We measured 0.0027% speed variation! The power supply for the motor control electronic, is build into in the air supply box, to keep high voltage distant from the inter connects delicate signal transmission. Connection is by a 5 meter shielded cable with LEMO connectors. The air supply is remote controlled from the motorbase. By pressing ether 33 or 45 rpm, first press the air supply goes “ON”, and second press the platter starts to spin. When turning “OFF” the selected speed, the air supply goes “OFF” automatically after 2 minutes. Very user friendly and convenient.
The air supply has been the object of our greatest attention. The goal is to design a silent air supply, which could be placed in the listening room, and deliver an even, clean and dry air flow. The pump is an oil free, long life unit, which do not require much maintenance. The impulses from the pump are absorbed in an encapsulated reservoir. This results in an even airflow to the air bearing. The air supply is mounted with a filter, which prevents dust particles in entering the system. This filter is replaceable when necessary.
Vacuum hold down
There are different way to flatten a record, and secure that the record have a good contact to the record mat/platter. A clamp covering the record label, will only keep the center of the record perfectly flattened. A metal ring, on the outer etch will only keep the outer part of the record flattened. The only way to flatten the record completely, is by obtaining a vacuum between the record and the mat/platter – vacuum hold down. The vacuum hold down invented by Bergmann Audio, is the most user friendly system. The vacuum pump – which is in the air supply box – doesn’t need to be turned “OFF”, when changing record. The user simply remove the vacuum clamp that is covering the center spindle, and the vacuum is released, and the record can easily be changed while the platter is still spinning.After changing the record, put back the vacuum clamp, and the record is automatically flattened by the vacuum hold down system.
Galder accept up to 4 tonearms – radial- and linear tracking tonearms. As standard, Galder comes with a main armboard, to fit almost any tonearm brand on the market – 9”, 10” and 12” tonearms. We customize additional armbords for the tonearm brand you want to mount on the Galder turntable.
Thor was the most popular of all Gods. Thor was worshiped by most – he was the God of people. He made lightning and thunder as he drove over the clouds in his chariot drawn by goats swinging with his hammer, Mjølner. Thor stood for physical strength. Thor`s role was among, to maintain law and order.
In the design and construction of Thor, we stay to our idea of simplicity: As few parts and assembling as possible, to avoid resonances.
The carbon fibre armtube is traditional for Bergmann tonearms- well considered construction in few parts, made as a double tube construction, with damping in between the tubes, to avoid any coloration in the signal path, generated by the stylus tip and the record groove. Even the most powerful musical passages in the music, will be reproduced with musical ease and very low distortion.The tonearm wire is- as usual in Bergmann tonearms- in one piece from cartridge clips to the DIN connector. The DIN connector ensure user flexibility for connection of the preferred interconnect phono cable.
Counterweight is decoupled from the arm- again to avoid any resonances.
Strength in the linear tracking airbearing tonearm
The Linear tracking tonearm tracks the record as it is pressed = no tracking error. The benefit is a distortion free and relaxed reproduction, even at complex passages. One more important advantage of the airbearing is the tonearm’s immunity to acoustic feedback, as the floating part (armtube and head shell) has no mechanical contact to the fixed part of the tonearm, and the turntable. The only contact is through the stylus tip and the tonearm wire. Timbre, details and nuances, is a natural part of the transparent and vivid acoustic image. The 3D spaciousness, layering between instruments and zero tracking error is something traditional tonearm finds hard to achieve.
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