the box pro DSP 18 Sub

I replaced my old passive system with T-box Pro products. With this in mind, I bought 2 sets of 2xDSP18 sub + 2xDSP112 Top sets.
So, I currently have 4 X DSP18 sub boxes. Unfortunately, the built-in DSP is not necessarily in line with the capabilities of the box. Since the lower limit frequency is 30Hz, it starts to limit too early, very far from reaching full volume. This should be reported, because there is more in the box than that. I use it with a dbx PA2 system processor, here I set the lower limit frequency to 41 Hz, which makes it sound much, much louder and more powerful. (This frequency is perfect for me because we only use them for rock sound reinforcement) The workmanship is absolutely good for the price, a solid, well-built product. I had to make carts for it, because unfortunately wheels cannot be installed. The 4 boxes are enough (with an external system processor, properly measured and set up) to organize an outdoor event for about 300-350 people. (Anyone who says 2 boxes are enough for this is lying :-) ) I plan to buy at least 2 more in the future. Thank you Thomann

Szép és elegáns, telt mélye van. Azonban nagyon hamar limitel, és 2db 225W RMS TOP hangerejét nem bírja követni. Elvileg egy equalizer segíthet ezen, ha 40Hz-nél megvágom, de ezt még nem próbáltam. Plusz költség. Mobil DJ-ként használom, de a maga 40 kilója mellett nincs rajta normális fogás. Túl nagy, ezért könnyen derékfájás lesz az emelgetéséből. Jól át kell gondolni, hogy biztos ez kell-e neked.

In terms of sound, this subwoofer does the job it was designed for, but it doesn't offer a linear response on the declared frequencie range. The manufacturer does not provide details in the user manual about the speaker model used or its impedance, about the amplifier module model used and its specifications, about the maximum input signal supported or if the frequency response is measured at -3 dB or -10 dB. Also, no wiring diagram is provided. On the very low frequency range, below 40 Hz, this subwoofer will have difficulty reproducing the sound satisfactorily. The lack of specifications regarding the speaker model and the amplifier model used, as well as the lack of a wiring diagram, create difficulties in identifying the necessary spare parts in case of need. I requested additional information from the brand owner, who responded promptly, stating that the subwoofer speaker supports a power of 600 watts, at an impedance of 4 Ohm, and the amplification module delivers 800 watts. So, if you are wondering why the "Limit" LED lights up sooner than you expect, here is one of the reasons. Also, keep in mind that when you use both XLR input connectors on the subwoofer, the sensitivity of the input signal increases, and on the low frequency output circuit this signal is summed, and therefore the maximum output volume position shifts down, to about 1 o'clock. Also, you must set the input and output gain levels correctly on the mixer, equalizer or active crossover. There's a good reason for the "0 dB" marking on your level meters. The user manual specifies a peak power of 2400 watts, but some models specify the peak power differently, on some, such as the one in the photo published on the website, appears 1800 watts peak, and on others, such as the one I purchased, 3200 watt peak appears, which raises questions about the honesty of the data declared by the manufacturer and the consistency of the components used in the manufacturing process.
The box appears to be well assembled and solid, but you have to be careful during manipulation because the finishing is easyly prone to scoring.