filtres actifs

modeles analogiques années 60 à 80


Luxman A 2002

Filtre actif 2 voies à 6 et 12 dB/octave.
Equipé de tubes 12AU7 ECC82, à fréquence fixe mais avec cartes interchangeables sur slot pour changement de la fréquence de coupure.

Luxman A2003

A fréquence fixe mais avec cartes interchangeables sur slots pour changement de la fréquence de coupure, en 6 et 12 dB/oct, tubes 12AU7 ECC82

Luxman FL-15

Filtre actif 2 voies, 12 dB/octave.
Possibilité de sortie de la voie grave en sommation, pour utilisation d'un caisson de grave.

Circuit du système: type NF
Gain de bande passante: 0dB
Fréquences de coupures: 100Hz, 200Hz, 400Hz, 800Hz
Caractéristiques de coupure: 12dB/oct
Atténuation à la Fréquence de coupure: 3 dB
Impédance d'entrée: 70kohms
Impédance de sortie: 1k ou moins
Tension d"entrée maximum admissible: 5V
Distorsion: 0,2% (sortie 5V)
3 tubes 12AU7 (Toshiba)
Dimensions: Largeur 250mm x hauteur 155 × profondeur 180

Luxman FL-153

Filtre actif 3 voies à 6 et 12 dB/octave.
Possibilité de sortie de la voie grave en sommation, pour utilisation d'un caisson de grave.

Système 3D
Fréquence de coupure low-med:flat 125 250 500 800Hz
med-high:1.5k 3k 5k 7kHz
Caractéristiques de coupure 12dB/oct - 6dB/oct
Distorsion harmonique totale 0,1% (à la sortie 1V)
Impédance d'entrée 250kohms
Impédance de sortie low:1ko - med:100ohms - high:100ohms
Tension d'entrée admissible low: 5V - med:4V - high:4V
Tension de sortie maximale low: 4V - med:4V - high:4V
Gain low:+13dB - med:-0.5dB - high:-0.5dB
Bruit résiduel low:0.3mV - med:0.1mV - high:0.1mV (Volume maximum)
Semi-conducteurs utilisés 18 Transistor 2SC693Gu - 1 2SC734 - diode 1 DS16B
Puissance AC100V 50Hz/60Hz
Consommation électrique Moins de 2W
Dimensions extérieures hauteur 180, largeur 155, profondeur 250mm

Luxman FL-202

Luxman FL-202 Balanced Electronic Crossover, 80-150-290-380-500-660-800-1k-1280-1700-2kHz, 12-18 db, locking Fc, Polarity switch and Level for HP & LP, XLR-Balanced in/out

Marantz Type 12AX7 Tubes

Marantz Model 3

Blocs mono à tubes

Marantz AD-5

2way multichannel electronic crossover network.

As for the cut-off frequency, the LPF and HPF side has been independent.
And it can select from 11 points (70Hz, 90Hz, 180Hz, 300Hz, 500Hz, 800Hz, 1.2kHz, 3.2kHz, 5kHz, 7kHz, and 10kHz).

A slope selector is a two-point slope selector which can choose two kinds of loss in quantity, 6 dB/oct and 12 dB/oct. And it is the knob with which the LPF and HPF side became independent.

A high precision conductive plastics volume with little error with a panel window is used for a level control. And the delicate sound volume of a right-and-left speaker can be adjusted with the Dual-unit type of a L-R independency.

By setting the switchpoint of a panel to INTERNAL, HPF and LPF can become a series connection, and it can operate as a band pass filter, and can upgrade to 3way and 4way by additional of AD-5.

The center channel for subWoofers is equipped. Cut-off frequencies are 70Hz, 100Hz, and 150Hz. The slope property is 24 dB/oct.

Marantz AD-6

The electronic crossover network used for a multi-amplifier system.
A basic stream composition consists of the high-pass filter (HPF) and low pass filter (LPF) which divide a stereo signal into a low-pass output and a high region output, and an 11-point selection is possible for it in a cut-off frequency to a HPF-LPF independency.
A switchover of 6 dB/oct and 12 dB/oct is possible for a slope property.
The super-low-pass center channel output only for three-dimensional system is carried.
Each output signal is from 0. - Level adjustment is possible to infinity.

Although it is a stream composition of 2way+three dimensional fundamentally,Development in multisystems in HPF and LPF being connected in series by the switchpoint change of the front panel, and functioning also as a band pass filter (BPF) and connecting AD-6 with two sets and three sets, such as three ways and a 4 way + subWoofer, is possible.

A circuitry is based on the stream composition which sandwiches the filter circuit according the buffer amplifier of a low-noise and a wide band to a resistor and a capacitor highly precise forward and backward in between -- low -- the distorted property is realized.

Mark Levinson LNC-2L

The electronic crossover developed aiming at the crossover which is not inferior to LNP-2 and JC-2.
LNC-2L consists of main-unit LNC-2L and power-source part PLS-153L.
Every one channel filter circuit of every of a high-pass and a lowpass consists of a total of four modules.
Adoption of this module construction has realized the cross over frequency specified as the user in a high robustness and precision.
Although LNC-2L is 2 way type, if two OCS modules of an option are incorporated, it is also possible to use it as a 3 way type by one set.
However, the damping characteristics of a high region in this case serves as 6 dB/oct.
By LNC-2L carrying out a two-set (they being four sets when it is four ways) using, for forming 3 ways by 18 dB/oct, in that case, by using HX SERIAL INPUT, the high region can pass the filter for mid ranges, and can connect a preamplifier output to a high-pass filter direct.
Moreover, when using two sets and forming 3 ways, it is also possible to use one set at a time as 3 way type of a monophonic recording.
The MONO BASS functionality is carried.

Naim Naxo 3

Nakamichi EC-100 + PS-100

19 Fréquences réglables de 66 à 7400 hertz à 12 dB/oct + alimentation externe PS-100

Nakamichi EC-200

5 Fréquences réglables de 50 à 220 hertz à 12 dB/oct

Nikko CO-23

Nikko CO-23 electronic crossover, 2-way, 12-18 db/oct