Brinkmann Bardo Turntable

Music in your home, as if you were there!

The picture shows the standard model Bardo with the magnetic motor drive. The Bardo performance features the metal cased power supply that is used for the Balance and LaGrange turntables instead of the standard power supply. The result is a more defined bass response and a wider room imaging.

The tonearm base of the Bardo can be rotated and fixed without play to allow a simple and precise tonearm adjustment for all tonearms between 9” and 12”. The base is drilled according to the tonearm that the customer chooses.

The output sockets can be found on the back of the turntable, they can be equipped with RCA or XLR sockets, and it is also possible to install tonearms with DIN connectors or fixed cables.

The two possible speeds, 33 1/3 and 45 rpm, are selectable by a switch at the front of the turntable and can be fine adjusted via two screwdriver holes that are located next to the switch.

The Bardo has a magnetic direct drive motor that was developed by Helmut Brinkmann. There is only one bearing for the motor and the platter, a circular magnet is mounted into the bearing of the platter and is concentrically driven into rotation via coils on the circuit board under the magnet. An electronic circuit drives the coils via two magnetic sensitive resistors that react to the magnetic fields into a highly constant and slow circular movement. Many of the known direct drive turntables were constructed for studios and radio stations where it was necessary to have very quick start-up times of less than a second which was achieved with high torque motors that speed up and stop the motor very rapidly. This caused heavy cogging effects accompanied by high wow & flutter numbers. To avoid this, a proprietary motor control transfers just enough energy to the motor for it to remain at constant speed. The motor’s stator consists of four specially designed field coils, which are mounted concentrically with high precision around the platter bearing. Based on listening sessions, the typical 90 degree mounting angle was forgone in favor of a non-standard 22.5-degree roster, which, due to the magnetic fields overlapping, further reduced cogging. The motor’s rotor also acts as the sub-platter and carries a magnetic ring with eight poles on its underside. Inside the motor, the rpm of a speedometer disc is measured and turned into variable voltage that is fed into a control circuit where the rpm is compared to the reference voltage that is adjustable via the trim pots. A separate heater for the bearing, as included with the Balance and LaGrange bearings, is not necessary. The motor circuit is kept under current all the time, just the speed is switched to zero or 33 resp. 45. In this way, the bearing is kept warm by the quiescent current of the motor drive.

For those of you who are interested, there is more information about the magnetic drive motor of the Oasis and Bardo turntables in the white paper about the Oasis at the manufacture website.

Output Per Channel (8Ω/4Ω)                            80W / 80W

Conversion to Mono                                            Factory or Wire Kit
Output in Mono Configuration (8Ω/4Ω)      160W / 160W

Frequency Response                                           5Hz to 200kHz
THD (Full Power)                                                   3.0{538ef4ef8c239f9f336b243d4c86cb13dc7516093f0e76e3bd53b4459e751194}

Gain (Nominal into 8Ω)                                      26dB
Input Impedance (Mono)                                  108 kΩ

Number of Power Cords                                     1
Input Impedance (Stereo)                                215 kΩ

Power Consumption (Idle / Full)                    500W / 1000W
Tube Complement                                               4x 6H30, 6x 6SN7, 2x 6V6, 4x 6C33C-B

Dimensions                                                            17″ x 9″ x 24″
Remote Control                                                    No

Weight                                                                     100 lbs