Yamaha RX-V2400, LFE low end freq resp?

Question for my good and wise friends on the AVSforum.

My RX-V2400 is a bit dated but has served me very well.(no true HD 7.1 but who knew back then)

There is no specification I can find for low end LFE freq. response. NOt in the manual or on Yamaha web site. They don't exactly ask you to contac us either. Dolby spec. is 10 Hz to 120 Hz. In the GLOSSARY section of my manual. "this channel is for the reprodcution of low bass sounds. The frequency range for this channel is 20 Hz to 120 Hz." Looks like more of a general definition than a product specific spec however.

Does anyone know what the freq. response is or how to find out?

The reason I ask is for planning a second sub with which I will use the LFE line.

I am looking at the LFE, it doesn't really give a spec. The GLOSSARY says 20 Hz to 120Hz. Why would they high pass the LFE at 20 Hz?

Very easy to provide down low for line out.

10 Hz to 100kHz CD terminal to L/R but no spec. for the LFE, except for the mention in the GLOSSARY.

Took a little while but I got an answer from Yamaha.

"The RX-V2400 will pass a 10Hz signal out the sub output and if one is sent to one of the speakers that are set to small, it will pass to the sub as well."

Two thumbs up for Yamaha support

Reciever been a joy to own as well

DIY sub sub project is back on