Korg Musical Instrument TP 2 User Manual

Owners Manual  
KORG INC. 4015-2 Yanokuchi, Inagi-city, Tokyo 206-0812 Japan  
2004 KORG INC.  
1508 CTH Printed in Japan  
©
THE FCC REGULATION WARNING (for U.S.A.)  
This equipment has been tested and found to comply with the limits  
for a Class B digital device, pursuant to Part 15 of the FCC Rules.  
These limits are designed to provide reasonable protection against  
harmful interference in a residential installation. This equipment  
generates, uses, and can radiate radio frequency energy and, if not  
installed and used in accordance with the instructions, may cause  
harmful interference to radio communications. However, there is no  
guarantee that interference will not occur in a particular installation. If  
this equipment does cause harmful interference to radio or television  
reception, which can be determined by turning the equipment off and  
on, the user is encouraged to try to correct the interference by one or  
more of the following measures:  
Precautions  
Location  
Using the unit in the following locations can result in a malfunction.  
• In direct sunlight  
• Locations of extreme temperature or humidity  
• Excessively dusty or dirty locations  
• Locations of excessive vibration  
• Close to magnetic fields  
Power supply  
• Reorient or relocate the receiving antenna.  
Please connect the designated AC/AC power supply to an AC outlet of  
the correct voltage. Do not connect it to an AC outlet of voltage other  
than that for which your unit is intended.  
• Increase the separation between the equipment and receiver.  
• Connect the equipment into an outlet on a circuit different from that  
to which the receiver is connected.  
• Consult the dealer or an experienced radio/TV technician for help.  
• Unauthorized changes or modification to this system can void the  
user's authority to operate this equipment.  
Interference with other electrical devices  
Radios and televisions placed nearby may experience reception  
interference. Operate this unit at a suitable distance from radios and  
televisions.  
Handling  
CE mark for European Harmonized Standards  
CE mark which is attached to our company’s products of AC mains  
operated apparatus until December 31, 1996 means it conforms to  
EMC Directive (89/336/EEC) and CE mark Directive (93/68/EEC).  
And, CE mark which is attached after January 1, 1997 means it  
conforms to EMC Directive (89/336/EEC), CE mark Directive (93/68/  
EEC) and Low Voltage Directive (73/23/EEC).  
Also, CE mark which is attached to our company’s products of Battery  
operated apparatus means it conforms to EMC Directive (89/336/  
EEC) and CE mark Directive (93/68/EEC).  
To avoid breakage, do not apply excessive force to the switches or  
controls.  
Care  
If the exterior becomes dirty, wipe it with a clean, dry cloth. Do not use  
liquid cleaners such as benzene or thinner, or cleaning compounds or  
flammable polishes.  
Keep this manual  
After reading this manual, please keep it for later reference.  
IMPORTANT NOTICE TO CONSUMERS  
Keeping foreign matter out of your equipment  
This product has been manufactured according to strict specifications  
and voltage requirements that are applicable in the country in which it  
is intended that this product should be used. If you have purchased  
this product via the internet, through mail order, and/or via a tele-  
phone sale, you must verify that this product is intended to be used in  
the country in which you reside.  
Never set any container with liquid in it near this equipment. If liquid gets  
into the equipment, it could cause a breakdown, fire, or electrical shock.  
Be careful not to let metal objects get into the equipment. If something  
does slip into the equipment, unplug the AC/AC power supply from the  
wall outlet. Then contact your nearest Korg dealer or the store where the  
equipment was purchased.  
WARNING: Use of this product in any country other than that for  
which it is intended could be dangerous and could invalidate the  
manufacturer’s or distributor’s warranty.  
Please also retain your receipt as proof of purchase otherwise your  
product may be disqualified from the manufacturer’s or distributor’s  
warranty.  
 
If you are using a guitar or the line output from an instrument,  
connect it to the TRS phone jack.  
Introduction  
Thank you for purchasing the Korg TP-2 Dual Tube Preamp w/  
Optical Compression and Digital Output. In order to enjoy long  
and trouble-free use, please read this owner’s manual carefully,  
and use your TP-2 only as directed.  
Balanced phone plug  
Unbalanced phone plug  
GND  
GND HOT  
COLD HOT  
Features  
2. Phantom power switch/LED  
The TP-2 is a dual-channel preamp featuring two 12AX7 vacuum  
tubes, plus fast operating and transparent optical compression  
and limiting circuitry. Designed to accept a variety of sources  
over a wide range of levels, it is ideal for your most critical and  
demanding recording applications.  
This switch supplies +48V phantom power to condenser mics. The  
LED will light if +48V power is being supplied. Power is supplied  
only to the XLR jack. Turn this off (LED dark) if you’re using a  
dynamic mic.  
If a condenser mic is connected or disconnected with the phantom power  
switch on, damage to your equipment may occur. For this reason, always  
turn the phantom power switch off before connecting or disconnecting a  
condenser mic.  
In addition to both XLR and 1/4” TRS balanced outputs, the TP-  
2 also features both optical and coaxial digital outputs (S/P DIF  
format) allowing it to interface with other digital equipment, or  
to serve as a stand alone AD converter.  
Using a specially tuned version of our acclaimed Valve Force  
circuit, the TP-2 delivers the robust, musical warmth and mid-  
low region presence typical of vacuum tubes. The optical  
compression responds quickly and transparently, providing a  
distinctly full analog body without adversely coloring the sound.  
In addition, the optical compressor’s gain reduction and limiting  
circuitry allow you to avoid any audio clipping while you’re  
recording.  
3. Phase switch  
If you are inputting a stereo source from audio equipment in which  
the hot and cold pins are wired in reverse, the stereo image may be  
unsteady or cancellation may occur. By pressing this switch in,  
you can invert the phase of the input signal by 180 degrees to  
compensate.  
4. Gain trim knob  
This knob adjusts the input gain. If the PAD switch is on (pushed in),  
the range is +14 – –34 dBu. If the PAD switch is off, the range is –12 –  
–60 dBu.  
1. Parts and their function  
5. Hi-Z switch  
This switch changes the impedance level of the TRS phone jack to  
high impedance. It is on when the switch is pushed in. Turn this  
switch on when connecting a high output impedance device such as  
guitar or bass.  
14 15  
16  
17  
18 19  
6. PAD switch  
This switch lowers the level of the input signal by 26 dB. The pad is  
on when the switch is pushed in. When a line level input source is  
connected, turning the pad on will allow the gain trim knob to have a  
wider useful range of adjustment.  
7. Compressor mode switch  
This switch changes the compressor’s response speed. Use the Fast  
setting for short sounds such as drums or percussion, and the Slow  
setting (press the switch in) for more sustained sounds, such as  
vocals.  
1
2
3
8. Low cut switch  
4
5
6
This switch activates a 70 Hz –6 dB/oct low cut filter.  
Use this to reduce unwanted low-frequency content. The filter is on  
when the switch is pressed in.  
9. Level meter  
7
8 9 1011 12  
The meter shows the audio level. If the needle moves into the red  
area above 0 dB, this indicates that digital clipping is occurring.  
Set the gain trim knob and the compressor sensitivity knob to prevent  
the needle from exceeding 0 dB.  
13  
Place the unit horizontally so that the level meters operate correctly.  
1. INPUT 1, INPUT 2 jacks  
The level meters indicate the level of the signal before it is sent to the  
output level faders.  
These are balanced inputs that combine XLR jacks and 1/4” TRS  
phone jacks.  
Unbalanced phone plugs may also be connected to the 1/4” jacks.  
If you are using a condenser mic requiring phantom power, connect it  
to the XLR jack.  
10. Gain reduction LED  
This LED will light when gain reduction is being applied by the  
compressor.  
2: HOT  
1: GND  
XLR jack  
11. Compressor sensitivity knob  
3: COLD  
This specifies the audio level where the compressor begins to kick in.  
Turning the knob toward the right will increase the sensitivity, so that  
compression will be applied even at low levels.  
If you don’t want to apply compression, turn this knob all the way to  
the left.  
1/4" TRS phone jack  
 
12. Link switch  
2-2. Adjusting the input level  
Press this switch in to link the two channels together for use with  
stereo sources. When linked, compression will be applied equally to  
both channels whenever either channel exceeds the compressor’s  
sensitivity threshold, preserving the stereo imaging.  
When you’ve finished making your connections, watch the TP-  
2’s level meter while you use the gain trim knob to adjust the  
level. Set the trim knob so that the level meter needle does not  
exceed 0 dB when the loudest sound is input.  
If the level meter goes beyond 0 dB even when the gain trim  
knob is turned all the way toward the left, press the PAD switch  
and then use the gain trim knob to adjust the level.  
13. Output level fader  
This adjusts the output level.  
When the fader is at the 0 dB position, the meter level will match the  
output level.  
Normally if the needle goes beyond 0 dB, digital clipping has oc-  
curred, causing distortion. You should set the level so that it does  
not exceed 0 dB.  
14. Sampling frequency select switch  
This switch selects the sampling frequency of the S/P DIF output.  
You can choose from 44.1 kHz, 48 kHz, and 96 kHz.  
2-3. Using the compressor  
Turn the compressor sensitivity knob all the way to the left so  
that the compressor is not being applied.  
Use the gain trim knob to raise the level so that the meter  
slightly exceeds 0 dB during the loudest input passages.  
Slowly turn the compressor sensitivity knob toward the right.  
The gain reduction LED will begin to light, indicating that the  
compressor is being applied.  
15. S/P DIF output (optical, coaxial)  
An optical jack and a coaxial jack (IEC 60958, EIAJ CP-1201) both  
provide a S/P DIF format digital output.  
Connect the digital output to the digital input jack of your other  
equipment.  
16. Analog output jack (XLR)  
This is a balanced output jack using an XLR connector.  
17. Analog output jack (TRS)  
While watching the level meter, continue turning the compressor  
sensitivity knob until the level does not exceed 0 dB during the  
loudest input passages.  
This is a balance output jack using a TRS phone jack.  
18. Power switch  
If you want to apply a lot of compression to intentionally  
“squash” a vocal, use the gain trim knob to raise the input level  
further, and turn the compressor sensitivity knob toward the  
right to increase the compression.  
This is the power switch. Press it in to turn the power on. Pressing it  
again will turn the power off and return the switch to the out  
position.  
19. AC9V connector  
By using the gain trim knob to raise the preamp level appropriately,  
you can saturate the vacuum tube, generating analog overtones to  
enrich the sound in conjunction with the compressor.  
Connect the included AC/AC power supply here.  
2. Operation  
2-4. Using the link switch  
2-1. Connections  
Turn on the link switch if you want to use stereo compression.  
When you’re recording a stereo source, and the level of one  
channel rises to the point where compression is being applied to  
only that one channel, then the relative volume of the other  
channel will increase, producing the impression that the stereo  
image has shifted to one side. In such cases, turning on the link  
switch will automatically apply compression to both channels at  
the same time, whenever either channel reaches the  
First connect the AC/AC power supply to the TP-2’s AC9V connec-  
tor, and then plug it into an electrical outlet.  
Start by connecting your external equipment.  
Connect the AC/AC power supply. If you will be using the  
digital output, set the sampling frequency select switch to the  
correct frequency for your other gear, and then turn on the  
power.  
compressor’s threshold level.  
Before turning on the power, set the output level faders to – so that  
sudden loud noise does not occur.  
So that the compressors for both channels will function in the  
same way, select the same compressor mode setting for both  
channels (either Fast or Slow). You should also set the compres-  
sor sensitivity knob to about the same setting for both channels.  
Guitar  
3. A note about the vacuum tubes  
This device contains vacuum tubes. We recommend that you  
allow the tubes to warm up for about ten minutes after you turn  
on the power, before you begin running any audio signals  
through the TP-2.  
to the  
AC outlet  
to digital  
input devices  
to a mixer  
or HDR  
If you begin using this device immediately after turning on the  
power, this may cause malfunctions and/or shorten the life of  
the vacuum tubes.  
In order to maximize reliability, avoid placing this device above  
or below heat-producing equipment such as a power amp.  
Mic  
Do not attempt to remove, replace or change the tubes in the TP-2.  
The tubes are not a user serviceable part.  
Vacuum tubes generate heat. Do not allow your skin to contact the  
vacuum tube cover for an extended period of time. Doing so can  
cause low-temperature burns.  
 

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