You're welcome.

[br]This might assist you in understanding where a guitar amplifer's preamp fits into the amplifcation chain and what it does.

In simplified terms, a pre-amp effectively takes the basic line signal from the instrument and shapes its tonal charateristics before passing it on to the power amp stage where the grunt is added to the signal sent to the speaker/s.

In lay terms, Brilliance is like a [u]variable[/u] Bright to Warm tonal control allowing the user to "stop at all stations" in between Bright and Warm rather than offering an either or choice of presets (albeit alterable through patching) as in for instance the ID Core Series. [br][br]HP Filter is a frequency cut/filter. Cut and pastes on the HP Filter and Brilliance functions straight from the manual below are fairly self-explanatory.

17. H.P. Filter This controls a High Pass Filter. Adjust this trim pot to roll off low-end frequencies from your amplifier’s output. At the minimum setting the frequencies filtered will be below 25Hz, and at the maximum setting, the frequencies filtered will be below 180Hz. Rolling off low frequencies can help with definition in a mix with other instruments.

18. Brilliance Adjust this trim pot to apply an increase or decrease to the higher frequencies of your amplifier’s output. At maximum settings this will result in a brighter, sharper response from your tone. At lower settings, the tone is warm and mellow.

[br]Contemporary featured, versatile and great sounding small venue performing and home studio acoustic amp Anthony.[br]