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Replacement Tube Selection & Bias
This amplifier features Yorkville’s auto-balancing / auto-matching tube biasing technology. As a
result, when the time comes to replace the tubes in your Yorkville amplifier, there is no need to pay a
premium for a matched set – nor does the bias need to be adjusted when you use a different brand.
We make no claims as to which brands of tubes might sound best, but with auto-balancing / auto-
matching, you are free to experiment without any need for concern that the amplifier or tubes will
be distressed. Please note that auto-balancing / auto matching cannot fully compensate for different
types of tubes - 6L6/5881s versus 6CA7/EL34s, for example.
Please note that although auto-balancing / auto matching allows you the freedom to select unmatched tubes from a variety
of manufacturers, it may not be able to fully compensate for the use of a non-equivalent model or part number of tube
– 6L6/5881s versus 6CA7/EL34s, for example. Use of non-equivalent tubes may result in unpredictable performance.
Electronics
Vacuum Tubes 2 x 5881WXT (alt 6L6B)
3 x 12AX7 (alt 7025A)
DC powered filament supply on preamp tubes
Bias Supply Autobalancing
Power Output 40 Watts RMS
Speaker YCV40: 12 inch Celestion® speaker
YCV40T: 2x10 inch Celestion® speakers
Channels one lead & one clean channel
Input Impedance 1 Meg ohm
Tone Controls Separate tone controls on both channels
(Treble, Bass, & Middle)
Presence and Reverb on Master Section
Reverb Accutronics® long-reverb with dual-springs
Power Supply Fully regulated
Connectors
Input Jack 1/4 inch phone jack
Send Jack Balanced 1/4 inch TRS
(Tip-positive / Ring-negative / Sleeve-ground)
Return Jack Unbalanced 1/4 inch phone jack, 10kohms
Speaker Jacks Two 1/4 inch phone jacks
Footswitch Jack 1/4 inch TRS, accepts a standard,
latching dual-footswitch & connecting cable
Cabinet
Cabinet Construction all plywood
Covering Leatherette
Grille Perforated 18 gauge painted steel
with silver cloth covering
Dimensions (WxHxD) 23.0 inch x 18.5 inch x 9.0 inch
58.4 x 46.9 x 22.8 cm
Weight 45 lbs (20.4 kg)
Power Requirements
120V 60Hz 1.0A
230V 50Hz 0,5A
Warranty Two-year, unlimited (even if you break it!)
transferable warranty*
(valid in USA and Canada only)
Footswitch Included Two button (Channel Select / Boost)
with separate LED indicators
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