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AX84 Hi-Octane Tube Guitar Amplifier Project

[classic projects] [current version] [testing version] [old versions]

Overview

The Hi-Octane is like a juiced up rock and roll amp from the 80's... only smaller. Like a P1 but with an extra preamp tube, this is a good choice for someone who wants more distortion and has built an amp or two before.

Tone goes from cleanish to semi-saturated distortion, depending on gain settings and guitar volume setup. Responds well to pedals and retains your guitars tone.

Features

  • Hi-Gain 12ax7 Preamp
  • 6BQ5/EL84/SV83 Power Tube in Class-A Single Ended Configuration provides a surprisingly loud 5 watts or so of output power.
  • Cathode-follower driven Bass, Mid and Treble tone controls allow you to shape your sound. Alter the values of the components in the tone stack to tailor your sound.

Skill Level: intermediate --- Status: Ready to Build.

Before using these materials, please read our terms and conditions.


Current Materials

P1 Theory Document The P1 Theory Document - although this refers to an old rev (10) of the P1, this information is required reading for understanding the basics of a simple tube amp.
Builders Guide The Builders Guide document for single-ended AX84 projects
10.10.04 Hi-Octane Schematic, bill of materials, board template and chassis layout for the 10.10.04 version of the AX84 Hi-Octane.
08.05.07 Chassis 1 Drill Plan
Drill guide for the P1, Hi-Octane, P1-eXtreme, SEL, and October ~ Studio projects 16" x 8" x 2" chassis.
10.10.04 Hi-Octane Options Guide
This guide contains AX84 options for the Hi-Octane amp.
10.10.04 Hi-Octane Modifications Guide This guide contains AX84 modifications for the Hi-Octane amp.

Older Version Materials

10.06.16 Hi-Octane Schematic, bill of materials, board template and chassis layout for the 10.06.16 version of the AX84 Hi-Octane.
08.05.07 Hi-Octane Schematic, bill of materials, board template and chassis layout for the 08.05.07 version of the AX84 Hi-Octane.
08.04.27 Hi-Octane Schematic, bill of materials, board template and chassis layout for the 08.04.27 version of the AX84 Hi-Octane.  This update adds voltage readings to the schematic.
08.04.10 Chassis Drill Plan
Drill guide for 16" x 8" x 2" chassis.
08.04.10 Hi-Octane Options Guide
This guide contains AX84 options for the Hi-Octane amp.
08.04.10 Hi-Octane Mods Guide
This guide contains user-submitted modifications for the Hi-Octane amp.
06.02.23 Hi-Octane Schematic, board template and chassis template for the 06.02.23 version of the AX84 Hi-Octane.
08.02.29 Hi-Octane Schematic, board template and chassis template for the 08.02.29 version of the AX84 Hi-Octane.
05.11.23 Hi-Octane Schematic, board template and chassis template for the 05.11.23 version of the AX84 Hi-Octane.

Is this area looking a little skimpy? Looking for older materials and soundclips from previous version? Check out [the older versions]


AX84® is a registered trademark of Doberman Music Products, LLC. AX84.COM content may not be reproduced without the express written consent of Doberman Music Products, LLC (sales@dobermanamps.com).
For information about using the AX84® trademark, project names and designs, click here