Page 1
R u b y
INPUT
PRESENCE
Two-Rock
Two-Rock
Owner's Manual
Page 2
Page 1
Thank you for your purchase of a
Two-Rock amplifier from K&M Analog Designs, LLC.
As a discerning guitarist, you know the road to great
tone begins with great components.
Our classic design, carefully selected parts and hand-built
approach combine to make an extremely versatile instrument.
Please take the time to read this manual. We hope it will
answer any questions you may have.
We extend a warm welcome to you as a member of a select
group of musicians who have chosen a Two-Rock amplifier.
Page 3
FRONT PANEL FUNCTIONS
1. INPUT JACK- High impedance input to the amplifier. Plug in your
instrument here.
2. BRIGHT SWITCH- Boosts the high frequency response. This is most
effective when the input gain is set at 12 o’clock or lower. The effect is less
dramatic as the input gain control is adjusted past the 12 o’clock position.
3. INPUT GAIN- Adjusts the overall gain of the amplifier. Start with this
control in the 12 o’clock position. Keep in mind that the amount of gain set
here determines the signal level feeding the lead channel. Low gain settings
of this control will require higher lead gain settings for the same amount
of overdrive.
4. TREBLE CONTROL- Adjusts the high-frequency response. In the full
counter-clockwise position, high frequencies are bypassed to ground. In the
full clockwise position, high frequencies are allowed to pass to the next gain
stage.
5. MIDDLE CONTROL- Adjusts the mid-range response. In the full counter-
clockwise position, the tone will be somewhat "scooped" of mid-range
response, emphasizing the highs and lows. In the full clockwise position,
mid-range frequencies are allowed to pass to the next gain stage.
6. BASS CONTROL- Adjusts the bass response. In the full counter-clockwise
position, low frequencies are cut. In addition, the response of the treble and
mid-range controls is greatly reduced. In the full clockwise position, low
frequencies are allowed to pass to the next gain stage.
7. MASTER - Adjusts the overall output level of the amplifier
Page 2
Two-Rock
Ruby
MIDDLE
BASS
PRESENCE
GAIN
MASTERINPUT
TREBLE
STANDBY
1 2 3 4 5 6 7 8 9
10
11
Bright
ON
LOOP
BYPASS
Page 4
8. PRESENCE CONTROL- Adjusts the contour of high-frequency
response. The high-frequency response will increase as you advance the
control clockwise.
9. LOOP BYPASS- This switch bypasses the effects loop.
10. INDICATOR LAMP- This lamp will illuminate when the power switch is in
the “up” position, indicating the unit is receiving A/C power.
NOTE: All switches are ON in the "up" position.
Page 3
Page 5
REAR PANEL FUNCTIONS
1. A/C INPUT- Connects the amplifier to A/C power via the power cord
supplied. Unless otherwise specified, your amplifier is designed to operate
on 120 volts A/C, 60 cycles.
2. FUSE- 3 AG Type, slow blow fuse. Refer to the legend below the fuse holder
for the proper fuse rating for your amplifier. (50 watt-2.5 amp /100 watt-
3.5 amp)
3. POWER SWITCH- Turns the power on.
4. INPEADANCE SELECTORI
5. SPEAKER OUTPUT JACKS- There are 2 speaker output jacks
NEVER OPERATE YOUR AMPLIFIER WITHOUT A PROPER SPEAKER
LOAD CONNECTED. Be sure to match the impedance of your cabinet with
the impedance (output) of the amplifier.
6 EFFECTS SEND- Use this jack to send the amplifiers signal to outboard effects.
7. EFFECTS RETURN- Use this jack to connect the output of your effects to the
amplifier.
Page 4
Two-Rock, CA
1 2 3 4 6 7
A/C 120 VOLTS
60 CYCLES
FUSE
2.5 AMP
SLO-BLO
SPEAKER OUTPUTS
4 16
SEND
RETURN
EFFECTS LOOP
K&M Analog Designs
Manufactured by:
MADE IN U.S.A.
S/N
8
POWER
Two-Rock, CA
5
Page 6
TUBE COMPLEMENT
V1- 12AX7, Pre Amp
V4- 12AX7, effects
V3- 12AX7, Phase inverter
V4, V5- EL34, Output
Each fine production tube is tested and matched to our exacting
specifications. Individual bias controls are provided for each output, as well
as phase-balance adjustment. This ensures maximum tube life, power, and
performance.
NOTE: Please do not attempt to adjust tube bias or phase balance. Refer service
to qualified service person only.
LINE CORD- For your safety, connect to grounded A/C receptacle only.
Page 5
Front
Rear
V1V3V2V4V5
The Tube Location
Page 7
K&M Analog Designs amplifiers are brought to
you by Bill Krinard and Joe Mloganoski. We know your new
Two-Rock amplifier will provide many hours of enjoyment and
inspiration in the years to come.
This manual is a resource for some of your questions.
Please contact us with any other questions or comments
you may have. We look forward to hearing from you!
PHONE: 1.707.584.TONE (8663) (M-F 9am – 5pm PST)
FAX: 1.707.584.8661
MAILING ADDRESS: K&M Analog Designs, LLC
619 Martin Avenue, Suite 6
Rohnert Park, CA 94928
E-MAIL: Joe Mloganoski, Product Specialist
Bill Krinard, Chief Engineer
INTERNET: www.two-rock.com
PRECAUTIONS:
Do not expose to rain or any other moisture
Do not use cleaning solvents. Wipe exterior with a clean,
dry cloth only.
Refer servicing to a qualified service technician.
Page 6
Page 8
This is a product of
K & M Analog Designs, LLC
619 Martin Avenue, Suite 6
Rohnert Park, CA 94928
Serial Number:___________
Loading...