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Tweeter Base Assembly Drawing
(UNIT: mm)
100
1
1
2
15
100
Outer & Installation Hole Dimensions
(UNIT: mm)
R38
4-Ø 4.5
Ø 87
30
Ø 65
Ø 44
RED DOT
Polarity: Plus (+)
#110
Ø 62.5
#110
Frequency Response
120
110
100
90
80
70
60º
60
Impedance
(dB)
50
Hz
100 200
500 1K
2K
5K
10K 20K
50K
FOSTEX COMPANY
1-1-109, Tsutsujigaoka, Akishima City, Tokyo, 196-8550, Japan
Tweeter Base Board Cutting Plan
(Board Material: MDF T15)
(UNIT: mm)
100x2
50
1
1
2
30
2
Specifications
Type
16 mm horn tweeter
Impedance
8 Ω
Freq. Response
5 kHz ~ 35 kHz
SPL
96 dB/W (1 m)
Input
30 W (Music)
Cut-off Freqeuncy
2.6 kHz
Recommended
5.0 kHz or higher
Cross-over Freq.
Magnet Weight
113. 5 g
Total Weight
340 g
• Specifications and appearance are subject to change
without notice for product improvement.
0 º
Ω
64
30 º
32
* Caution
16
8
The FT17H magnetic circuit is not completely leakage
4
free and a slight leakage is observed at its right behind
direction. Do NOT place any magnetically susceptive
media within 10cm at right behind the magnetic
circuit.
© PRINTED IN CHINA NOVEMBER 2013
Main Features
The model FT17H is an easy to use high performance horn tweeter. With its precisely engineered horn part and
specially made diaphragm, it offers sharp sound and high efficiency. Its magnetic circuit is constructed with low
magnetic leakage, and it can be used as a plus-one tweeter for main speaker system just with plain network. It is
suited to use in combination with Fostex FE-series or FF-series full range speaker drivers.
Tweeter and Dividing Network
• Tweeter should be connected to either woofer or mid-range driver
via dividing network. Use as high quality components as possible
for the dividing network. If you used poor quality components for
the network, the sound would be drastically deteriorated and
distorted. We recommend using Fostex network components and
attenuator model R80B.
• If you use 6dB/Oct. network, it is recommended to use a capacitor
whose capacity is 2.2uF or less. Use a high quality film capacitor.
* Caution
It is not good to connect a tweeter directly to an amplifier. Doing
so would cause a break of voice coil wire and buzz sound. Please
connect a tweeter via the dividing network.
Practical Application
FE206En+FT17H+BK206En
This is an example of the FE206En installed in the back loaded horn box
BK206En adding an FT17H as plus-one tweeter. The network consists of one
piece of film type capacitor connected in series and it offers 6dB/Oct filtering.
We recommend the value of capacitor as 1uF.
Connect the capacitor to FE206En in phase. Locate the FT17H on the top of
BK206En enclosure and about 45 mm retracted position from the BK206En
baffle board, i.e., measure the distance at the flat surface of FT17H outer horn. This positioning will make
smooth association of main speaker and tweeter. We recommend the use of tweeter base when locating the
581189
FT17H. Please refer to the tweeter base drawing below.
OWNER'S MANUAL
HORN TWEETER
FT17H
Thank you for purchasing the Fostex product. Please
read this manual thoroughly before start using and use
the product correctly.
6dB/Oct.
C
2.2µF or less
Attenuator
Input
12dB/Oct.
C
Input
Attenuator
L
12dB/Oct.
Cross-over Frequency
C (µF)
L (mH)
5,000Hz
2.2
7,000Hz
1.5
0.18
10,000Hz
1.0
0.14
Capacitor
1µF
Tweeter
(8Ω)
Tweeter
(8Ω)
0.3
FE206En
FT17H
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