Systems List › DIY › TC Sounds Pro5100 Sealed
NotesThis system utilizing the 5100 driver in a small sealed enclosure produced a rolled off response towards the deep bass which is expected from a higher sensitivity driver. Still 90dB sensitivity is maintained until 50Hz which is not bad and 95dB sensitivity is shown just above there. Sensitivity at 20Hz falls well in line with other drivers in this same cabinet and betters a few. The top end is smooth and extended indicating that inductance is well controlled. Indeed the top end is very smooth out past 800Hz. This driver could potentially be used up to 500 or 600Hz! Which is very rare for a driver with this much displacement capability and power handling. The time domain measurements show nothing to be concerned about. Sealed enclosures rarely do. the decay rates are clean and uneventful. The impedance measurement indicates that the system resonance is at about 42Hz.
The long term output compression sweeps start out at a drive level of 3.5 volts to reach 90dB at 50Hz at 2 meters outdoors and reach 88 volts input corresponding to about 2600W maximum input power by the final 118dB sweep. The Pro 5100 exhibits great control at this power level and little compression with just a hair at the top end and what is probably so loss of motor linearity and suspension tightening at the bottom end. During the 118dB sweep there was some grumbles from the driver and very large excursions so the testing was stopped at this level. Levels of over 120dB were reached at the top of the bass range which is loud indeed in this environment.
Looking at the distortion measurements show that the 5100 is clean and well controlled down to about 30Hz where it starts to exhibit increased distortion levels. THD never tops 10% until below 30Hz even during the 118dB sweep. The THD below 30Hz gradually rises and breaks 20-30% at the maximum drive levels used but this is not uncommon nor a bad performance considering the excursion levels the driver is asked for at those frequencies. The distortion is composed of primarily the 3rd harmonic followed by the second. There was probably a little bit left in the 5100 driver but due to the cost of this unit and it being loaned to Data-Bass for testing it was decided not to explore further.
CEA-2010 burst output measurements show that the 5100 has good but not exceptional output capabilities below 20Hz but really starts to come into it's own at 31.5Hz and above. Again overall distortion is rather well controlled and is dominated by the 3rd harmonic primarily. At 50Hz and above the 5100's sensitivity starts to kick in and peak levels of 125-130dB are recorded which are quite loud indeed.