Hsu does include a CD with test tones for bass with their subs.
If you are looking for other CDs to help, Alpine Electronics (the old school car audio folks) produced some great CDs in the 90s with music and test tones.
Two to look for are: Disc Drive and Highway One.
Highway One has some of the cleanest and most dynamic musical test tracks I have ever heard along with many test tones. It is a fabulous demo CD if you can find one. It was made for the Australian market, so tough to find in the states. Subs are fun and rewarding once dialed in. Good luck!
If you are looking for other CDs to help, Alpine Electronics (the old school car audio folks) produced some great CDs in the 90s with music and test tones.
Two to look for are: Disc Drive and Highway One.
Highway One has some of the cleanest and most dynamic musical test tracks I have ever heard along with many test tones. It is a fabulous demo CD if you can find one. It was made for the Australian market, so tough to find in the states. Subs are fun and rewarding once dialed in. Good luck!