SERIES IV
SERIES IV
The Series IV tonearm features most of the design elements found in the flagship “Series 5.” These include, among others: a tonearm tube extruded entirely from magnesium alloy, a two-piece base that allows for precise adjustment of the entire system, and a counterweight that, in addition to its primary function, effectively dampens resonances arising within the tonearm’s structure. Thanks to its precision craftsmanship and strict adherence to design principles, the “Series IV” sets the standard for other tonearm manufacturers in its price range.
Key
features of the SERIES IV tonearm:
A unique tonearm tube design, extruded entirely from a magnesium alloy.
The inner surface is coated with a special compound that dampens any residual vibrations that may arise within the arm’s structure itself.
The head platform’s surface is meticulously machined to prevent resonance at the point of contact with the cartridge.
A stainless steel spindle with 10-mm ABEC-3 ball bearings mounted on it. The entire assembly is supported by a solid yoke and positioned at the same height as the platter surface, which effectively prevents sound distortion.
A unique assembly method for individual components that ensures high rigidity and guarantees a precise fit of the bearings even before the entire arm is assembled.
The vertical bearing shaft is made of stainless steel and features an integrated 16-mm-diameter flange that connects it to the yoke.
Made of hardened steel, this 23-millimeter-diameter vertical bearing housing is equipped with a pair of 17-millimeter ABEC 7 ball bearings. The bearings are widely spaced to prevent the arm from tilting.
Anti-skating force adjustment is achieved using a fiber connected to a spring. The dial is calibrated according to the values on the tracking force (VTF) knob.
A lift that allows for precise lowering and raising of the needle from the surface of the plate. Its range of operation can be adjusted.
A two-piece base that provides high rigidity and enables precise control of arm movement.
A counterweight made of a tungsten alloy, supported at two points and damped. Its special low-inertia design reduces the impact of eccentrically machined plates on the insert’s operation.
The suspended counterweight housing ensures optimal distribution of the center of gravity. This mounting configuration further stiffens the end of the arm tube, preventing uncontrolled vibrations in the system. The counterweight can be adjusted by rotating the knurled ring after first unlocking the locking nut.
The swivel output connector allows for optimal routing of the signal cable. This design also minimizes the transmission of vibrations to the subchassis.
The ability to adjust the tonearm height (VTA) using a screw located in the tonearm body.
Precisely marked horizontal lines on the arm tube make it easier to adjust the arm to the correct height.
Precise adjustment of the horizontal reading angle (HTA) using a screw mounted in the base.
A special template makes it easy to set the optimal horizontal reading angle.
The tool included in the set makes it easy to install the tonearm on any turntable.
Technical Specifications for the SERIES IV Arm:
| A | the distance between the arm’s axis and the insert | 233,15 | mm |
| B | the distance between the arm’s axis and the plate’s axis | 215,35 | mm |
| C | spacing of the screws securing the insert | 12,7 | mm |
| D | offset of the insert axis | 23,635 | o |
| E | linear shift | 93,47 | o |
| F | insert projection | 17,8 | mm |
| G | height above the mounting surface | 56,4 – 87,9 | mm |
| H | the height of the plate’s surface relative to the mounting surface, which allows the arm to be secured | 26,4 – 57,9 | mm |
| J | depth below the mounting surface | 56,75 | mm |
| K | radial play (range of motion) of the counterweight | 73 | o |
| L | clearance between the cover and the surface of the plate with a 17-mm-high insert | 35 | mm |
| Effective mass | 10/11 g | |
| Insert Balancing Range | 5 – 16 g | |
| Pressure Adjustment | 0 – 3g (30mN) | |
| Maximum tracking error | 0,012 o/mm | |
| Zero points (Baerwald) | 66,04 i 120,9 mm | |
| Signal cable | ||
| length | 1,2 m | |
| capacity | 140 pF/m | |
| resistance | 0,145ohm | |
| Okablowanie wewnętrzne | ||
| capacity | 15 pF/canal | |
| resistance | 0,535ohm | |
| Output plug | 5 – contact D.I.N 240 o | |
| Weight | 700 g |
The arm is also available in a version with a removable head. You can also purchase an arm with gold-colored accents or a fully gold-plated arm.