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Luxman AT-3000 Transformer type line controller

The line controller which adopted the transformer type Attenuator of 23 steps as the level control.

The damping characteristics by an electrical resistor is used in the general Attenuator. For this reason, the direct-current-resistance component which goes into a signal line in series had affected the tone quality. In order to improve this, the transformer for line signals is developed newly, and it carries in AT-3000. 

23 steps are taken out from the secondary coil of a transformer, by considering it as the scheme which switches each level by a high precision rotary switch, a resistor can be eliminated completely and a part for direct current resistance is stopped few. 
The 0.2mm material of a nickel super permalloy is adopted as the transformer as a multi-laminating structure based on many trial productions and auditions. Moreover, the introductory city and the transformer for line signals with a high purity are realized for the know-how original with how to take out the center tap on a coil etc. 
The attachment by maple material is adopted as mounting of a transformer by the view of supporting firmly mechanically, being in midair magnetically. The scrupulous design this attachment unifies the orientation of grain is carried out. 
Moreover, in order to prevent the induction from the outside, it is considered as the dual structure which arranged the pure-copper inner shielding cabinet in the main-unit chassis.
-60dB and 23 contacts to a upper
Maximum input level
Frequency response
20Hz – 20kHz, less than ±2dB (at the time of a 10kohm load intensity)
The maximum boost ratio
 H 111mm; W 250mm; D 345mm


Made in Japan.

All our components are subjected to careful technical control and fulfil entire mechanical and electronic characteristics given by regulations.
The set includes items seen in the picture.

Condition: 8 / 10
Price on request
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Price: SOLD