The Comparison
In frequency response terms, the JBL SRX828 performs almost identically to two SRX818, meaning it gives you the same frequency response with 6dB more output. The JBL SRX828 offers maximum continuous output of 134dB at 67Hz. The BASSBOSS SSP118 is competitive with the SRX828, offering almost equivalent output between 35 and 50Hz.
Low Frequency Output Comparison
At maximum level, the JBL SRX828 offers:
- 3dB more output at 30Hz
- 2dB more output at 35Hz
- 0.8dB more output at 40Hz
- 0.3dB more output at 45Hz
- 0.7dB more output at 50Hz
Above 50Hz the two lines diverge — the JBL continues higher and the SSP118 goes lower.
The SSP118 was designed to be a subwoofer — to deliver as much deep bass as possible from a relatively small, portable enclosure. Between 40 and 50Hz, it runs neck-and-neck with a double 18-inch subwoofer, from a box that's half the size.
SSP118: Deep Voice by Design
Under normal conditions, the SSP118's energy is focused between 35 and 55Hz. When pushed to the limit, it peaks at 50Hz. The JBL SRX828's energy is focused between 47 and 83Hz, peaking at 67Hz.
This is a deliberate design choice to give the SSP118 a full, rich tone — to make it sound big and deep. At any level the SSP118 has a "deeper voice" than either of the SRX boxes.
The Bottom Line
In comparison to the SRX818, the SSP118 is deeper and louder. The SRX828 has a louder voice in the upper bass — but if you want the SRX828 to match the tonality of the SSP118, you would have to give up much of the area where it is louder.
If you like your bass deeper, the SSP118 will do very nearly everything the SRX828 will do from a box that's half the size.
Specs at a Glance
| | SSP118 | SRX828SP |
|---|---|---|
| Continuous SPL | 130 dB | 134 dB |
| Peak SPL | 136 dB | 140 dB |
| Peak Output Frequency | 50 Hz | 67 Hz |
| Warranty | 6yr box / 3yr amp | 2yr box / 3yr amp |
