Yorkville Sound YS1036 Amp In & Pre-amp Out, DIN Footswitch Jack, ¼ -inch Footswitch Jack

this cable to the Input of your effects unit. To send the processed signal back to the YCS100, connect the output of the effects unit to the Rtn jack of the YCS100. The Send Level control enables fine adjustment of the signal being sent to the external effects unit. The front panel mounted EFX Return controls will allow you to adjust the amount of effect return to each individual channel. As an example you can set up a very lush chorus sound in Channel 3 yet still have a dry chunky sound set up in Channel 2 without having to do a pedal dance. Simply switch back and forth between the channels and the sound will already be there.

Amp In & Pre-amp Out 25

The Amp In and Pre-Amp Out jacks can be used as a loop-thru for guitar pedals or other effect devices. Simply plug a ¼-inch cable from the Pre-Amp Out jack of the YCS100 to the input of the effect unit or pedal. Plug another ¼-inch cable from the output of the effect unit, or pedal, to the Amp In jack of the YCS100. This is handy when you have devices that are intended for insertion into the signal chain. The signal level at this point is -10dBV so it will work with most guitar effect pedals as well as professional rack equipment.

DIN Footswitch Jack* 22

The DIN footswitch jack on the rear of the YCS100 is intended to connect with the Traynor TFS-4 footswitch pedal via a standard MIDI/sync cable. This will allow the user to access the three individual channels and the Solo volume boost function via the foot-controller. With the TFS-4 connected, the channel selection can still be achieved via the front panel switches; the Solo function will be overridden by the foot-controller.

¼ -inch Footswitch Jack* 23

Connecting a latching dual footswitch, such as the Traynor TFS-2, to the ¼-inch TRS Footswitch jack will allow separate defeating of the Reverb and Effects return signals. This will defeat the return signals in all three channels at once. LED’s will indicate the status mounted on the TFS-2.

Phones/Line Out, XLR Balanced Line Out Jacks and Level Control 27

For maximum versatility, The YCS100 has both ¼-inch and XLR Line Outs. The ¼-inch output also doubles as a headphone jack. This Phones/Line Out jack can be used with any stereo headphone. The signals sent from these outputs are post-master and have speaker simulator compensation. These outputs will remain active when the amplifier is in standby mode so the YCS100 can be used as a pre-amp for recording or simply for silent practicing. When operating in standby mode, speakers do not need to be connected. If you are using the XLR line out as an output to a mixing console for live sound reinforcement the Tuner Mute will also mute these outputs.

Amplifier Mode 28

The YCS100 output stage can be operated in either

100-watt or 30-watt modes. While in 100-watt (Class AB) mode. The amp will produce a full 100-watts of output power; this is for situations where maximum headroom is required. For situations where more tube warmth is required at lower volume levels, the YCS100 can be switched to operate in 30-watt (Class A mode). This is done by cutting the operating voltage to the output tubes in half and automatically adjusting the bias level to operate in Class A mode. All four output tubes still operate in the 30-watt mode but at a reduced power level, therefore increasing output tube longevity.

The output impedance of the YCS100 power amplifier changes in different power modes therefore the MINIMUM speaker load impedance also changes. In 30-Watt mode, you can choose between a MINIMUM load impedance of 2-ohms or

4-ohms. When in 100-Watt mode, the MINIMUM load impedance choices are 4-ohms or 8-ohms.

Tech Note: Knowing the MINIMUM load impedance of an amplifier is important when connecting speaker cabinets to the amplifier. Each speaker cabinet has a rated NOMINAL impedance that directly affects the sound and performance of the power amplifier. If you use speakers that load the amplifier too much (i.e. using a 2-ohm load on an amplifier rated at 8-ohms), you will make the amplifier exceed it’s

*The switching is accomplished with internal relays so there are no audio signals flowing through the footswitch cables. Footswitch-induced noise is never an issue. The YCS100 ¼-inch footswitch is compatible with most after- market latching dual footswitch pedals.

Speaker Jacks and Impedance Selector Switch 27

The dual ¼-inch jacks allow convenient connection of external speaker cabinets. Insure that speakers are properly connected and that the impedance selector is set to the appropriate position before operating the amplifier.

capability and will lead to shorter tube life.

Speaker Cabinets

You can either connect speakers in parallel or series.

Most speaker enclosures have parallel output jacks that

enable users to chain speaker extension cabinets

Y & I

N

together. Series connections are rarely used.

IT

N

O

L

A

U

V

The easiest way to describe this is if

A

Q

O

I

•

T

•

you have two 8-ohms speaker cabinets

N

connected in parallel the resulting

impedance would be 4-ohms (16-ohms if

•

•

they were wired in series).

E

3

S

T

6

9

A

B

1

LIS HED