Optional parts for self-made speaker

¥ 7,000 (around 1976)

Metal acoustic lens.
The directional characteristics can be improved by combining with a speaker using a straight horn H850 or H1250.

Number of blades : 10 blades

¥ 3,000 (a set of two, around 1976)

Pipe Duct Kit.
The length can be adjusted, making it suitable as a phase inversion duct for UP203, UP203S, FP203, FW300, etc.

Inner Diameter : 80 φ
Length : 250 mm maximum

¥ 3,100 (1 sheet, around 1992)

A 5-layer structure magnetic shield panel consisting of a silicon steel plate with high permeability, laminated on both sides with plywood and poly-veneer with good surface hardness.
By using P45, unwanted magnetism leaking from speakers can be suppressed and adverse effects on cathode ray tubes, etc. can be eliminated.

Material : Silicon Steel Plate, Plywood, Poly Veneer
External Dimensions : H 450x W 300 mm
Thickness : 6 mm
Weight : 1 kg
Packaging : Plastic bag with opening paper / 1 sheet

¥ 2,200 (around 1992)

Attenuator.

Impedance : 8 Ω
Input : 100W (Mus.)

¥ 3,850 (around 1992)

Attenuator.

Impedance : 8 Ω
Input : 200W (Mus.)

¥ 18,100 (around 1992)

A 1-dB step attenuator.

Impedance : 8 Ω
Input : 100W (Mus.)

¥ 6,200 (around 1992)

Low-pass filter for 3D system.

Type : coil addition type
Impedance : 8 Ω
Crossover frequency : 100 Hz
Attenuation : 12dB/oct.

KG810 : ¥ 2,800 (2 pieces per set, around 1992)
KG816 : ¥ 4,800 (2 pieces per set, around 1992)
KG820 : ¥ 6,400 (2 pieces per set, around 1992)
K308 : ¥ 1,700 (a set of two pieces, around 1992)
K312 : ¥ 2,400 (a set of two pieces, around 1992)

Suitable Size
For KG810 : 10 cm (Round Frame Supported)
For KG816 : 16 cm (Round Frame Supported)
For KG820 : 20 cm (Round Frame Supported)
K308 : for 10 cm (for Square Frame)
K312 : for 12 cm (for Square Frame)