The main front panel controls are Volume, Tone and Master. In addition there is a 3-position Gain switch and a 3-position Bright switch
These extra switches can be used with the main controls to create a wide tonal range, both clean and overdriven. There is also a
socket on the back panel labelled "FSW". A click-on click-off footswitch can be connected to this socket to produce a fixed amount of
gain boost. Note: A footswitch is not supplied with the amplifier.
Most effects pedals can be used successfully with Impact amplifiers.
An Impact amp will drive any guitar speaker box, from a single 6-inch speaker to a 4 x 12 quad. It can be used with any load impedance
from 4 to 16 ohms, but the optimum load is 8 ohms. Clean output power is 2 watts into 4 or 16 ohms, slightly more into an 8 ohm load.
The amplifier can be operated safely without a speaker. If there is no speaker plugged into the speaker socket, an internal resistor
becomes the amplifier load. This allows the line out socket to be used to drive a larger amplifier, or for a direct input to a mixing desk.
A 12AX7 preamplifier valve is supplied with the Impact, but any other valve in the 12A*7 family ( 12AT7, 12AU7, 12AY7, 5751 ) can be
used in this position - changing the valve type will alter the gain and may also change the tone. A spare set of 6F4P/6DX8 output valves
is supplied with each amplifier, because these are not as readily available as more standard audio types.
There are a number of threads on the "Australian Guitar Gear Heads" forum http://www.guitargear.net.au/discussion/index.php with
end-user information from Impact owners, including preferred speakers and links to soundclips.
Impact amplifiers are on display and usually available for immediate purchase at:
River Music, Windsor www.rivermusic.com.au
Tym Guitars, Brisbane www.tymguitars.com.au
Music Swop Shop, Melbourne www.musicswopshop.com.au
