Angstrom Research

MAINS FILTERS

>>REFERENCE 4

"REFERENCE 4" PASSIVE FILTER

The four-stage filter is the second in the growing scale of ANGSTROM RESEARCH filters and, compared with the three series, has an extra filtering stage and is recommended in systems with monophonic amplifiers.
It is made with a mil-standard metal container with tuned frame to avoid resonance. It has completely suspended cabling with visible components using silver wires (mil-ww1687 600V/200 degrees AVG16).

Completely passive, using RCL filtering cells.
It comprises four stages with a high cutoff slope:
the two central high ampere filtering stages are dedicated to amplifiers, while the two lateral stages are dedicated to the other system elements, which on average, have low absorption.
The filtering stages are independent to ensure that each appliance is separately powered.
It has an independent earth system for every output, easily removed using the jacks on the back of the frame. This makes it possible to individually choose whether or not to connect each appliance to the earth system.

REFERENCE 4 has six dedicated outputs with multiuse sockets.
The front panel is made of anodised aluminium in hand pantograph decorated black or silver.
It has four leds which indicate the operation of each filtering stage and a central instrument which indicates the mains voltage.
Possibility of supplementary outputs.

TECHNICAL FEATURES

Passive
Suspended cabling
6 total outputs with triple sockets (extensible to 12)
2 separate outputs max 10 Amp dedicated for monophonic amplifiers
4 outputs max 8 Amp
Weight: 22Kg
Dimensions in mm: 484W 460D 155H

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