ValveTrain Amplification, LLC
Page 5
ValveTrain 427 User Manual
Technical Info
Power Requirement:
120 or 240 Volts A.C. (Alternating Current) – Grounded Outlet
Power Output:
Approximately 27 Watts R.M.S.
Tuber Order:
Numbered 1 through 5 from RIGHT to LEFT as you look at the back of
the amplifier.
Preamp Tubes:
12AX7 – This tube is located in position 1.
12AT7 – This tube is located in position 2.
Acceptable Alternatives:
12AY7
5751
ECC83 (Equivalent to 12AX7)
Power Tubes:
5881 Duet
These are located in positions 3 and 4.
Rectifier Tube:
5U4GB
This is located in position 5.
Speaker Load:
The total recommended load for the amplifier is either 4 or 8 Ohms.
The amps should operate without damage at 4, 8 or 16 Ohms. Do not
run the amp with speaker loads above 16 Ohms or below 4 Ohms.
Speaker Outputs:
There are 2 Speaker jacks located on the underside of the chassis
between Tubes #2 and #3. Please use the correct jack for the speaker
load that you are using.
Speakers:
Eminence Patriot Series Red, White & Blues 12”
This speaker is rated for: 8 Ohms and 120 Watts
Tricks & Recommendations
#1
Our Favorite Setting… (For Stratocasters, Telecasters and other Single Coil Guitars)
Set all 4 Controls between 7 and 8 and let it rip!!
#2
Learn to use the Volume control on your guitar…
Back it down to cleanup the signal and get clean, shimmering tones.
Open it up to get additional crunch and overdrive tones
#3
Enjoy!!
