Port City Amplification Twelve User manual

Twelve Amplifier
Port City Amplification
Owner’s Manual
(head and combo)
Important Safety Instructions
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE
THIS APPARATUS TO RAIN, MOISTURE, OR OBJECTS FILLED WITH LIQUIDS. DRINKS
SHOULD NOT BE PLACED ON THIS APPARATUS
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this amplifier near water.
6. Clean only with dry cloth.
7. Do not use near any heat sources such as radiators, heat registers, stoves, or other apparatus that
product heat.
8. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two
blades with one wider than the other. A grounding type plug has two blades and a third grounding

prong. The wide blade or the third prong is provided for your safety. If the provided plug does not fit
into your outlet, consult an electrician for replacement of the obsolete outlet.
9. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles,
and the point where it exits from the amplifier.
10. Unplug this amplifier during lightning storms or when unused for long periods of time.
11. Refer all servicing to Port City Amplification. Servicing is required when the amplifier has been
damaged in any way. This includes but is not limited to : the power-supply cord or plug has been
damaged, liquid has spilled in or on the amplifier, objects have fallen into the amplifier, the amplifier has
been exposed to rain or moisture, does not operate normally, or has been dropped.
12. Tubes get hot so please use caution when reaching into the cabinet for any reason. You can get
burned!!!
Congratulations on your Port City Twelve amplifier!
The operation should be almost completely intuitive if you are familiar with tube amplifiers.
However here is a guide, just in case…
IMPORTANT: Prior to turning on your Port City Twelve, make sure that there is a load connected
to the output jack of the amplifier chassis. If you have the Twelve head, this means ensuring that
you have connected an 8-ohm cabinet via a speaker cable to the output jack on the inner-back of
the head. If you have the Twelve combo, this means double checking that the ¼” jack connected to
the speaker is in fact connected to the jack on the bottom of the chassis. Turning on your amplifier
without having this load connected will damage your amplifier and is not covered under the
warranty.
Operating Instructions
Plug your amp in
CAUTION: Visually inspect the power cord plug for damage before each use. Do not use it if it
appears damaged. Always use a grounded/earthed AC socket. Never use a socket adapter that will not
ground the amplifier. To reduce the risk of fire or electrical shock, do not expose your amplifier to rain
or moisture. !
NOTE: Your Port City Twelve amp was wired for 120 volt AC power. Export versions are available,
but ensure that this what you have before powering the Twelve with a dierent voltage.

Plug your guitar in
First, turn the Volume knob down – counterclockwise – as far as it will go. Then plug one end of a ¼-
inch plug (standard guitar cord) into the input jack and the other end into your guitar.
Turn it on
The Power Switch turns your amplifier ON and OFF. The indicator lamp glows when the amplifier is
turned on. There is an initial warm-up time for tube amps, so allow your amp 1-2 minutes after turning
on the power switch before turning up the volume and beginning to play.
Turn it up
Turn your guitar’s volume knob up, turn the amplifier volume knob up, and release the kraken…
More technical information
Circuit Topology
The preamp and power stage signal paths are both 100% tube. The combination of two 12AX7A’s
along with two 6V6 based power amp yields 12 watts RMS output. Modifying the amplifier will void
your factory warranty.
Amplifier Maintenance
Besides the normal replacement of the indicator light and vacuum tubes/valves, your Port City Twelve
amplifier should require very little maintenance. However, if you notice a change in the performance
or the sound of the amp, or if have any questions regarding your amp’s performance please contact
Port City Amps.
Warranty Information
Tubes are warranted for 30 days while components (transformers, capacitors etc.) are warranted for 2
years. While parts and components are covered in this warranty labor is NOT and will be billed at an
hourly rate. Port City Amplification is NOT responsible for damage resulting from abuse, negligence
or misuse of the amp. We handle all warranty work at the factory. Any modifications of the amp will
void warranty. We require you register your amp with us by filling out the warranty form located at
www.portcityamps.com under the Warranty tab at the bottom of the page. (Warranty can be
transferred by contacting Port City Amps.)

If you ever have a question or concern about anything, any day, any time, please email
[email protected]
Port City Amplification
Swannanoa, NC
www.portcityamps.com
336 577-1810
Thanks again for your purchase. We hope you LOVE your Port City Twelve!
If you would like to take a photo of your amp/rig setup we would love to post it in the Port City
newsletter. Thank you for your business! Now put this down and play some music!
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