| Datasheet © www.heissmann-acoustics.de | |||||||||||||
| Measurements in DIN baffle in 70cm distance at 2,83V. Level scaled to 1m | |||||||||||||
 19mm ring radiator from Peerless, distributed by Quint-Audio. Equipped with a 4mm front plate, a 4-hole attachment, a "bead only design" as a membrane, a coupling volume and excellent measured values ... |
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Vifa / Peerless XT19TD00-04 (XT-200 K4) sound pressure & impedance (dispersion)
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Outstanding linear frequency response. From 2,5-14kHz + -0,5dB!
Full level from 1,2kHz. Extremely good-natured "roll-off". With an average of 89,5dB / 2,83V, the efficiency is rather below average. For most applications, however, completely sufficient. Outstanding pair equality in the two measured copies both in impedance, - and amplitude response. The maximum deviation of both drivers> 500 Hertz is + -0,15dB! This testifies to an excellent production consistency. Thanks coupling volume very low resonance frequency around 750Hz. The impedance peaks indicate a dose of low-viscosity ferrofluid. Their slightly different characteristics are completely meaningless, being far out of the usable range. |
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Vifa / Peerless XT19TD00-04 (XT-200 K4) Sound pressure at angles (15 °, 30 °, 45 °, 60 °)
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Extremely consistent and a 19mm voice coil corresponding Rundstrahlverhalten.Idealer game partner for broad-beam concepts. Also interesting would be the ring emitter a very small baffle (similar Samira) to provide a uniform directivity to the TMT / MT. | ||||||||||||
Vifa / Peerless XT19TD00-04 (XT-200 K4) Decay behavior
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Very smooth and fast decay over all frequencies. | ||||||||||||
Vifa / Peerless XT19TD00-04 (XT-200 K4) harmonic distortion
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Outstanding low distortion 3.order. From 2kHz at all measured levels <0,1%. The "good-natured" K2 increases relatively sharply below 3kHz. A little bit of "enhancement" is built in. Higher order distortion components are practically not apparent. For very level-stable combinations, I recommend separations from 3kHz. Smaller 2-way (e.g. with a 4 ″ TMT) can be separated by 2kHz. | ||||||||||||
Rating
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Conclusion
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Keyword: Ringradiator
Test Peerless / Tymphany XT25TG-30 / 04 (Vifa XT-300 / K4)
| Datasheet © www.heissmann-acoustics.de | |||||||||||||
| Measurements in DIN baffle in 70cm distance at 2,83V. Level scaled to 1m | |||||||||||||
 An extraordinary tweeter, equipped with a 5mm thick front panel, a 5-hole attachment and a "bead only design" as a membrane. |
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Vifa / Peerless XT-300 K4 (XT25TG-30/04) sound pressure & impedance (dispersion) |
Outstanding linear frequency response. Full level from 1,3kHz. Extremely good-natured "roll-off". The efficiency is on average 91,5dB / 2,83V. One copy has a resonance frequency that is 20% higher, but this has no effect in the intended working range. Otherwise congruent course from 1,5 kHz. Very well. At the frequency response you have to look very closely to see whether there are 2 or 3 drivers. Practically congruent course from 600Hz.
Vlt. a little note at this point: I do not buy any preselected drivers ... With such a result, one might suspect that. |
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Vifa/Peerless XT-300 K4 (XT25TG-30/04) sound pressure at angles (15°, 30°, 45°, 60°) |
Very uniform omnidirectional behavior. Somewhat stronger directivity than with 25mm calottes. No criticisms. Recommendation: Tuning linearly to 15 °. | ||||||||||||
Vifa / Peerless XT-300 K4 (XT25TG-30 / 04) |
Extremely smooth and fast swinging over all frequencies. | ||||||||||||
Vifa / Peerless XT-300 K4 (XT25TG-30 / 04) harmonic distortion Graph switches every 3 seconds |
Outstandingly low 3rd order distortion. From 1,5kHz <0,1% at all measured levels. The "good-natured" K2 rises relatively sharply below 3kHz. A little bit of "whitening" is built in. In the case of separations> = 2kHz, K2 should still remain below the perceptibility threshold, even at very high levels. | ||||||||||||
Rating
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Conclusion
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