Up for test is the SEAS Prestige H1397 1” Aluminum Dome Tweeter.
A commonly used tweeter in the car audio world and home audio world due to its compact size (outer diameter is only 53mm; approximately 2 inches) and relatively low cost.
Thiele-Small Parameters and Impedance
|Re||3.03||Ohm||electrical voice coil resistance at DC|
|Krm||0.001||Ohm||WRIGHT inductance model|
|Erm||0.53||WRIGHT inductance model|
|Kxm||0.0002||Ohm||WRIGHT inductance model|
|Exm||0.83||WRIGHT inductance model|
|Cmes||246||µF||electrical capacitance representing moving mass|
|Lces||0.07||mH||electrical inductance representing driver compliance|
|Res||1.05||Ohm||resistance due to mechanical losses|
|fs||1212.6||Hz||driver resonance frequency|
|Qtp||1.479||total Q-factor considering all losses|
|Qms||1.974||mechanical Q-factor of driver in free air considering Rms only|
|Qes||5.68||electrical Q-factor of driver in free air considering Re only|
|Qts||1.465||total Q-factor considering Re and Rms only|
|Magnitude of electric impedance Z(f)|
2.83v/1m, Nearfield and farfield merged at 1300hz.
Mic placed in the nearfield and measurements performed at an SPL equal to a farfield level of 90dB/1m.
Output increased to represent 96dB/1m.
- Small and very compact.
- $42 price tag (as of this writing) is attractive.
- Measured Sensitivity is ~ 85dB on-axis.
- Very nice off-axis performance, though be mindful of the on-axis rise. Likely a good candidate if a compact tweeter and 30 degrees off-axis aiming is called for.
- Well controlled high frequency dispersion.
- High THD below 2khz.
- Increasing THD above 5khz at 96dB output relative to 1m.
- Crossed at 2.5 kHz with an electrical LR4, this driver should be able to provide some decent output levels.
Overall, what I'm seeing here is a very compact, well-performing, low-cost tweeter.
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