Vox Ac 30 Circuit Modifications

By | January 26, 2023

The Vox AC30 is a classic British amplifier that has been used by countless guitarists over the years. It's known for its warm, overdriven tone, and it's been used on countless classic recordings. However, the AC30 is also a very versatile amplifier, and it can be modified to achieve a wide variety of sounds.

Here are some of the most common Vox AC30 circuit modifications:

*

Output transformer upgrade:

The stock output transformer in the AC30 is a good one, but it can be upgraded to achieve a different tonal character. A higher-wattage output transformer will give the amp more headroom, while a lower-wattage output transformer will make the amp more saturated.

*

Power tube upgrade:

The stock power tubes in the AC30 are EL84s, but they can be swapped out for other types of power tubes, such as 6L6s or KT88s. This will change the overall tone of the amp, making it brighter or darker, respectively.

*

Preamp tube upgrade:

The stock preamp tubes in the AC30 are ECC83s, but they can also be swapped out for other types of preamp tubes, such as 12AX7s or 12AT7s. This will also change the overall tone of the amp, making it brighter or darker, respectively.

*

Capacitor and resistor changes:

The capacitors and resistors in the AC30's tone stack can be changed to alter the amp's EQ. This can be a good way to fine-tune the amp's tone to your liking.

*

Speaker cabinet upgrade:

The stock speaker cabinet for the AC30 is a 2x12 with Celestion Greenbacks. This is a great speaker combination, but it can be changed to achieve a different tonal character. A different speaker cabinet or different speakers can make the amp sound brighter, darker, or more focused.

These are just a few of the many possible Vox AC30 circuit modifications. With a little bit of experimentation, you can easily customize your AC30 to achieve the perfect tone for your playing style.

Note:

If you're not comfortable working on electronic circuits, it's best to have a qualified technician perform any modifications to your AC30.

Additional resources:

* [Vox AC30 mods forum](https://www.thegearpage.net/board/index.php?board=120.0)

* [Vox AC30 mods wiki](https://en.wikipedia.org/wiki/Vox_AC30#Modifications)

* [Vox AC30 mods tutorial](https://www.youtube.com/watch?v=7s5_722_69U)


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