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Specifications
Type
YCS100H Tube Guitar Amplifier
Minimum Impedance (ohms)
2 (30-watt mode), 4 (100-watt mode)
Input Channels
3
Channel input
1/4 inch phone
Channel 1, 2, 3 - Controls
Gain, Volume,Treble, Mid, Bass, Reverb, and Effects
Channel 1, 2 - Switches
Boost, Scoop and Modern
Channel 3 - Switches
Boost, Bright and Modern
Channel 2 - Inputs
Shares Ch 1 input
Channel 3 - Inputs
Shares Ch 1 input
Channel Switching
Yes, footswitchable
Line Out (type / configuration)
Speaker Compensated XLR Balanced, 1/4" unbalaced
Effects Volume
Yes, 3 individual returns
Effects Loop / Location
Yes / Rear
Effects Footswitch / Function
Yes / Internal reverb and external effects globally defeatable
Internal Reverb / Effects
Accutronics® Spring Reverb
External Speaker Output / location
Yes / rear (Dual selectable Impedences)
Headphone Jack
Yes
Other Features
Standby Switch, Auto tube matching, DC filaments on preamp
tubes, Tuner mute, Separate tuner output, Footswitchable
Solo boost, Presence & Resonance
Dimensions (DWH, inches)
11.5 x 26.5 x 10.5
Dimensions (DWH, cm)
29.25 x 67.5 x 26.75
Weight (lbs / kg)
44 / 20
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
together. Series connections are rarely used.
The easiest way to describe this is if you have two
8-ohms speaker cabinets connected in parallel the
resulting impedance would be 4-ohms (16-ohms if they
were wired in series).
The formula to calculate Total Impedance for a parallel
system is …
1/RT = 1/R1 + 1/R2 + 1/R3 +1/R4 …
R = Rated Speaker Impedance
RT = Total Speaker Impedance
R1… = Speaker Impedance
Examples (Speaker cabinets connected
in parallel)
One 4-ohm cabinet = 4-ohms
Two 4-ohm cabinets = 2-ohms
Four 4-ohm cabinets = Not
Recommended
One 8-ohm cabinet = 8-ohms
Two 8-ohm cabinets = 4-ohms
Four 8-ohm cabinets = 2-ohms
One 16-ohm cabinet = 16-ohms
Two 16-ohm cabinets = 8-ohms
Four 16-ohm cabinets = 4-ohms
Eight 16-ohm cabinets = 2-ohms
Replacement Tube Selection & Bias**
The YCS100H comes from the factory equipped with
matched EL34EH output tubes. The circuitry has been
designed to accommodate any type of EL34/6CA7 as
well as any type of 6L6/5881 output tubes, as long
as the four output tubes be of a matching type. The
amplifier has also been equipped with bias sensing
points for each of the output tubes as well as a bias
adjustment pot that can all be accessed without
removing the chassis from the box. This makes tube
replacement quick and easy.
**We recommend adjusting the zero
signal bias to +25 mV +/-3mV DC
at each of the test points. Bias
adjustment should be done with the
amplifier configuration in the 100
Watt mode. Please refer servicing to
qualified personnel.
