Aikido Phono 2 specifications

Product Type: Preamplifier/Processor Aikido Phono2

High-end preamplifier with passive equalizer network for MM and high-level MC systems Input resistance and capacitance adjustable Amplifiers with low-noise field effect transistors

Tech nical data

Description : This small AIKIDO Phono preamplifier module not only inspires because of its technical data. Its advantages are in the tonal range. The advantages of a "passive" equalization come to bear here in a remarkable form. Of course, it is very difficult to describe sounds. Natural clarity, fascinating spatiality, sounding highs and solid basses may meet it. The amplifier can be optimally adapted to your MM system thanks to the adjustable input resistance and the adjustable input capacitance! The principle of the Aikido amplifier is an integral part of the Hi-FI high-end community in the USA and Japan. This principle is highly praised, especially in the tube amplifier scene. Just Google it under AIKIDO or John Broskie. The amplifier works with field-effect transistors. For the amplification, 2 of the 2SK170 field effect transistors, which were very popular in the 70s, are used for each channel. This transistor was very musically popular in its time and it is also very low noise. The passive RIAA equalization is highly praised in high-end circles. Unfortunately, this type of RIAA equalization is only used in the rarest cases today. The reason for this may be to be found in the high requirements that have to be placed on the input amplifier stage. This must cleanly process signals from 0.3 mV (20 Hz) to 30 mV (20 kHz). If you also want to allow a certain overdrive, you are at 100mV input voltage. If the first amplifier then has, for example, a gain of 30 times, an output voltage of 3 volts RMS results after the first stage. These are round 9V peak/peak........ Here it quickly becomes clear why this circuit concept is not so popular with the developers. This is where the AIKIDO amplifier concept shows its strengths. The Aikido amplifier is characterized by high controllability with small distortion factors. It is especially important that the amplifier stage works in Class A mode. Furthermore, the AIKIDO amplifier does not require global feedback. Double mono setup, up to separate setting of the input resistance and the input capacitance per channel! Connoisseurs among you can certainly guess now why the RIAA amplifier offered here can probably compete with very high-quality amplifiers.

Of course, only selected good components are used: Wima capacitors Metal oxide resistors Electrolytic capacitors from Panasonic , etc.

No electrolytic capacitors in the signal path! Styroflex capacitors can be connected at the input. High-quality 48 V /DC 6 Watt plug-in power supply from the brand manufacturer "Maen Well" 100 - 240 V/AC.

The amplifier board is built into an aluminum sheet housing. This prevents interference with the electronics. The amplifier can be easily connected via the high-quality sockets. Wooden housing for this module is available on request. The devices are manufactured by Dipl. Ing. H.-U. Otto produced in small series. Handmade "Made in Germany" also.

Other models of the same series:

Aikido Phono 2