here is the website for phl audio...these are high end pro audio drivers that have marine in mind... they are reasonabley priced, high power, and high efficency...they have hcld's, drivers, and coaxial drivers...
the only drawback is limited distribution and irregular bolt pattern..
imo there is no better driver made for boat audio http://www.phlaudio.com/main.html
Every PHL AUDIO loudspeaker is provided with :
a UV and humidity proof mechanical basis (over 200 hours of salt fog withstanding)
a patented heat extracting device called INTERCOOLER SYSTEMŽ which improves the power handling capacity by over 20% and drastically reduces thermal compression, allowing a 3"voice coil to handle as much power as a conventional 4"one
a flux demodulation ring magnet system which divides by 3 the harmonic distortion in the low frequency domain and reduces the inductance modulation by 50%, leading to dynamic and stable sound quality
a fully impregnated and treated mobile assembled set that ensures accurate and clear sound even at full sound pressure level - no acoustical clipping, no sonic fading with humidity or at cold or hot temperatures even after long duration storage
an industrial manufacturing process under full quality control to guarantee consistency to initial sample parameters and long life reliability at an exceptionally low failure rate.
a 3 year warranty period according to general warranty conditions