Older Eclipse Amp Question
 

I have an Eclipse 3620 installed in my car that's driving the front speakers. I also have an alpine amp to power the sub. The eclipse works great but I have a question about the crossovers. Particularly the high pass filter.

The low pass filter has an on and off switch along with the option to select the crossover point. There are no high pass filter switches or adjustments like my Alpine MRV-T420. I installed the amps with a friend of mine who said that the Eclipse 3620 has a non-adjustable high pass filter at 150 Hz. Is this true or can I adjust the crossover point of high pass filter?

Thanks in advance.

Anyone?