Prestige Line
Tweeters
| H1283 |
22TAF/G |
 |
22mm |
Aluminum/Magnesium alloy dome, grill |
6 |
1100 |
H9940 |
19.5 |
80 |
92.0 |
| H1397 |
27TAFNC/G |
|
27mm |
Aluminum dome, NIB magnet1 |
4 |
1170 |
NR2 |
26 |
90 |
90.0 |
| H1147 |
27TBC/G |
|
27mm |
Aluminum/Magnesium alloy dome, chambered, no FF |
6 |
600 |
H9932 |
26 |
55 |
92.0 |
| H1212 |
27TBFC/G |
|
27mm |
Aluminum/Magnesium alloy dome, chambered, FF |
6 |
550 |
H9932 |
26 |
90 |
91.5 |
| H1149 |
27TDC |
|
27mm |
Textile dome, chambered, no FF |
6 |
550 |
H9933 |
26 |
55 |
90.0 |
| H1211 |
27TDF |
|
27mm |
Coated textile dome, FF |
6 |
900 |
H9933 |
26 |
90 |
91.0 |
| H1189 |
27TDFC |
|
27mm |
Textile dome, chambered, FF |
6 |
550 |
H9933 |
26 |
90 |
90.0 |
| H1210 |
27TDFC/TV |
|
27mm |
Textile dome, chambered, SHIELDED |
6 |
800 |
H9933 |
26 |
90 |
89.5 |
| H1461 |
27TDFNC/GW |
|
27mm |
Titanium dome, NIB magnet1, grill |
6 |
750 |
- |
26 |
100 |
91.5 |
| H0881 |
27TFFC |
|
27mm |
Coated textile dome, chambered |
6 |
550 |
H9918 |
26 |
80 |
91.0 |
| H1406 |
27TFFNC/CG |
|
27mm |
Textile dome, truncated flange, NIB magnet1, grill |
4 |
1170 |
NR2 |
26 |
80 |
91.0 |
| H1396 |
27TFFNC/G |
|
27mm |
Textile dome, NIB magnet1, grill |
4 |
1170 |
NR2 |
26 |
80 |
91.0 |
| H1462 |
27TTFNC/GW |
|
27mm |
Textile dome, NIB magnet1, grill |
6 |
750 |
- |
26 |
90 |
90.5 |
| H1322 |
29TAF/W |
|
29mm |
Aluminum/Magnesium alloy dome with elastomer 2 guide front |
6 |
950 |
H9941 |
26 |
100 |
91.5 |
| H1318 |
29TFF/W |
|
29mm |
Fabric dome, with elastomer 2 guide front |
6 |
950 |
H9942 |
26 |
90 |
92.0 |
- A neodymium magnet or NIB magnet is a powerful magnet made of a combination of neodymium, iron, and boron Nd2Fe14B.
- NR = Not repairable
- Elastomer, see Wikipedia definition
Interpretting the PDF Data Sheets
Below, you will find some additional technical information that
explains how SEAS performs their loudspeaker measurements.
Power data specifications conform to IEC rule 168-5. The
signal is white noise, shaped to a defined spectrum, and
amplitude limited so that the peak voltage is two times the RMS
voltage.
The short term maximum power is specified as
the maximum noise power which the drive units can take
without permanent damage for sixty cycles consisting of one
second ON and one minute OFF.
The long term maximum power is defined as above but with
ten cycles consisting of one minute ON and two minutes OFF.
The mounting conditions in the above tests and during the
sound pressure frequency response measurement are identical.
Voice coil inductance is a controversial topic with no set
standard for measurement. Loudspeaker impedance cannot be
represented by a simple inductor at higher frequencies. We
calculate the inductance value at the frequency where the
impedance has risen 3 dB from its minimum above the
resonance frequency.
Resonance frequency( fs ) is measured in the SEAS lab with a sine
wave signal at 2Vrms across the driver terminals. There is no
established industry standard signal level for measuring fs. For
this reason, differing power levels and measurement methods
may give significantly different fs, and consequently different
values for all other parameters dependent upon fs.
Suspension compliance (Cms) (the inverse of the
suspension stiffness or spring constant) is related to the
moving mass Mms and the resonance frequency fs by the
equation:
( 2 π fs) ² . Mms . Cms = 1
Linear coil travel is specified as the total peak-to-peak
distance the coil/cone can move with no significant change in
the force factor.
Maximum coil travel is specified as the total peak-to-peak
distance the coil/cone can move without experiencing gross
mechanical non-linearities and limitations
http://www.seas.no
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