Dynavector DV-507 MKII Tonearm

The long-awaited introduction of the DV 507MKII tonearm

The new MKII version of the Dynavector DV 507 tonearm has made its long-awaited debut, building on the strengths of the original DV 507, which has enjoyed an excellent reputation among audiophiles worldwide since its release in 1984.

Because it is a two-axis inertial-controlled tonearm, the DV 507 can extremely precisely track the music signal loops cut in the recording, regardless of the type of cartridge. The DV 507 also offers excellent traceability for distorted recordings. Resolution and musical details are remarkable.

Special features

High-precision bearings made entirely of stainless steel

The use of high-precision stainless steel bearings ensures excellent dynamic sensitivity and stabilized tracking performance without deterioration due to aging.

Non-contact electromagnetic damping

Using a new damper with a powerful neodymium magnet provides better dampening and minimizes negative impact on tracking performance.

Great arm lifter

A larger arm lift provides a stable lifting motion that maintains performance over long periods of time, allowing pickups to be raised and lowered without stress.

Removable headshell connector

The use of a new type of connector ensures good contacting of the rhodium-coated headshell contact pin over a long period of time.

New headshell and connection cable

The new headshell is suitable for a variety of pickups. It is made of aluminum alloy and has an EIA standard connector. This allows rigid mounting of the pickup and azimuth adjustment. Pure 6N cable is used for the headshell connection cables and the arm's internal cables.

High quality arm cable

A machined aluminum connector is used. The 5-pin connector complies with the DIN standard. A double shielded cable and 4NOFC/6N hybrid construction ensure a premium arm cable construction.

Advantages of the two-axis inertial-controlled dynamic tonearm

A tonearm must work in two important ways to ensure that the cartridge can faithfully reproduce the signal from the grooved plate.

First, it must support the pickup so that the movement of the rocker arm accurately reproduces the audio signal.

Second, it must maintain excellent tracking capability for warped panels since few panels are perfectly flat.

These requirements can conflict with each other. However, the dual-axis tonearm offers an effective solution to the problem.

Key Features

- Electromagnetic damping system for precise tracking

• Arm lifter available
• Easy height adjustment
• Dynamic balance trailing force adjuster
• Dynamic damper installed in the forearm

To make the DV 507MKII compatible with a variety of turntables, the overall length and height of the arm have been reduced compared to previous versions. The DV505 and DV501 have enjoyed an excellent reputation in the European audio market since winning the Design and Engineering Award at CES Chicago in 1977, 1982 and 1985 .

The DV507MKII has important sonic improvements and is also easier to install and use. It incorporates all of the technologies in our tonearm design that have been developed since the DV505 and 501.

Biaxial inertia separation for precise signal reproduction and excellent tracking capability

'Biaxial inertia separation' may sound complex, but it simply refers to a tonearm with two arms that operate independently in horizontal and vertical planes. In contrast, a traditional tonearm only has one arm that moves both horizontally and vertically. This is called a gimbal tonearm, and the inertia for both planes is the same.

The DV507 dual-axis tonearm has high inertia for horizontal movement and very low inertia for vertical movement. We will now explain the reasons why this is beneficial.

A pickup is known to generate an audio signal by utilizing the differential movement between the rocker arm and the pickup body. So when the base of the cartridge (the tonearm) vibrates, the movement of the tonearm affects the audio signal.

In these conditions, the signal that causes the tonearm to vibrate consists of low-frequency, large-amplitude oscillations.

In the currently used 45-45 stereo cutting method, low-frequency signals are recorded almost exclusively in the horizontal direction. This means that the low frequency signal that can cause the tone arm to vibrate is only present as a horizontal force.

The tonearm must therefore have sufficient effective mass and rigidity in the horizontal direction to provide a stable platform for the cartridge.

However, for the medium to high frequencies, the effective mass of the tonearm should not be too large, as the total mass of the cartridge and the headshell must be taken into account. In summary, the tonearm should have a large effective mass and sufficient damping in the horizontal plane, but at the same time have a low effective mass in the vertical plane. These conditions are almost impossible to meet with a conventional tonearm design using a simple universal joint system. To solve the problem, Dynavector developed a dual-axis inertial controlled tonearm in which the shorter and lighter vertical forearm is attached to the end of the horizontal main arm. This is the special feature of the design.

Neodymium magnet for eddy current dynamic damping

A non-contact electromagnetic dampening system is designed to prevent sound distortion and poor tracking performance caused by tonearm resonances at low frequencies.

In this system, a curved rod is mounted at the rear of the arm in a magnetic field created by two powerful neodymium magnets. Any minimal movement of the rod due to undamped tonearm resonance creates an eddy current in the rod, which in turn interacts with the magnetic field to return the system to its resting state.

As demonstrated in our DV505 and DV501 arms, this dampening system is extremely reliable, with no degradation in performance over long-term use. expensive neodymium magnets are used due to their superior properties, and the thicker copper damping plate provides a much better damping effect.

Dynamic balance trailing force mechanism

The tracking force is applied using a precise coil spring device. This dynamic balance system ensures constant tracking force, regardless of any plate distortion. The trailing force can be adjusted simply by turning a calibrated wheel.

High-precision stainless steel bearings are used in the forearm. The dynamic sensitivity was further improved by a long-span bearing support. The vertical shaft to which the forearm is attached has smooth bearing movement, an important factor in the arm's operating and sound quality. The tracking capability has thus been significantly improved and the performance of the storage mechanism has been optimized.

Dynamic damper in the forearm

Most tonearms exhibit some irregularities in frequency response in the mid to low range around 100-150 Hz. This is called multiresonance or antiresonance. To eliminate such unwanted resonances, a dynamic damper was installed at the lower end of the forearm. This solution was developed after intensive theoretical consideration and experimentation.

Ease of use and operation

A larger arm lift has been provided to ensure easy operation so that pickups can be raised and lowered without stress. The arm lifter has also been improved to provide long-term performance stability.

To make it easier to adjust the VTA (vertical scanning angle of the needle on the record side), a height adjustment lever is provided. The height can be adjusted more precisely than other systems in the range of 0 to 7 mm.

The antiskating force is adjusted using a dial. The anti-skating force can even be adjusted while a record is playing.

installation

Despite its dual-axis design, the overall length of the DV507MKII has been shortened and is now similar to conventional tonearms. Therefore, installation is easy on most turntables.

To install the DV507MKII on the turntable plate, a 29mm diameter mounting hole is required. The distance from the center of the mounting hole on the arm plate to the center of the plate spindle should be 226 mm.

Specifications

Type: Two-axis inertial controlled

Dynamic and eddy current damping tonearm total length: 306 mm. With headshell: max. 326 mm

Effective length: 241mm (i.e. from the pivot point position of the tonearm to the stylus tip of the cartridge)

Overhang: 15 mm Offset angle: 21.5

Degree height: 59mm, lifts up to 92mm

Height adjustment range: 39mm-72mm on the center arm

Depth: 36 mm without connection cable

Optimal pickup weight: 15-35 g, including headshell

Horizontal caster angle deviation: -1.1 degrees - +2.2 degrees, 0 degrees on the inner area of the plate, 2.2 degrees on the outside

Caster force adjustment range: 0-38g in 0.2g increments

Sensitivity: Horizontal: less than 50 mgram, Vertical: less than 40 mgram

Net weight: 1,380g

Output connection: 5P plug

Headshell connection: EIA standard 4-pin connector

Accessories: Low-resistance (0.046 ohm/m, 54pF/m) high-quality arm cable, milled aluminum headshell weight 15.4 g, mounting template for the arm, overhang gauge for the headshell.