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The Vox AC15C1 ships stock with 2 EL84 power tubes and 3 12AX7 preamp tubes, and Vox amps are known for running their power tubes hard — expect to swap them every year or so of regular gigging. A retube is one of the cheapest ways to reshape this amp’s tone.
| # | Product | Price | Where to buy |
|---|---|---|---|
| 1 | JJ Electronics EL84/12AX7 Tube Upgrade Kit | $50-$75 | Amazon · eBay |
| 2 | Tung-Sol EL84/12AX7 Reissue Tube Set | $60-$90 | Amazon · eBay |
| 3 | Tube Amp Doctor (TAD) EL84-CZ/12AX7A-C Tube Set | $65-$95 | Amazon |
| 4 | Ruby Tubes 12AX7ACZ HG Preamp Tube | $15-$25 | Amazon · eBay |
| 5 | Electro-Harmonix EL84 / 12AX7 Tubes | $40-$65 | Amazon |
The picks, in detail
JJ Electronics EL84/12AX7 Tube Upgrade Kit
A popular full retube set — matched JJ EL84 power tubes plus 12AX7 preamp tubes.
- 2x matched JJ EL84 power tubes
- 3x 12AX7 preamp tubes
- Drop-in factory-spec replacement set
- Widely used, well-reviewed on the AC15C1 specifically
- Good balance of chime and punch
- Not a dramatic tonal departure from stock
Tung-Sol EL84/12AX7 Reissue Tube Set
Platinum-matched Tung-Sol power tubes paired with their reissue 12AX7 for a high-gain, vibrant tone.
- Platinum-matched EL84 pair
- 3x Tung-Sol reissue 12AX7
- Low-microphonics preamp tubes
- Vibrant, sustain-forward tone
- Reputable reissue tube line
- Slightly pricier than JJ sets
Tube Amp Doctor (TAD) EL84-CZ/12AX7A-C Tube Set
TAD’s AC15C1-specific set is tuned to tighten bass and tame harsh highs.
- 2x TAD EL84-CZ power tubes
- 3x TAD 12AX7A-C preamp tubes
- AC15C1-specific matched set
- Tighter bass response than stock
- Reduces harsh top end
- Import pricing can vary by retailer
Ruby Tubes 12AX7ACZ HG Preamp Tube
A popular single-tube upgrade for the V1 preamp position, which sets the tone for the rest of the signal path.
- High-gain 12AX7 variant
- Drop-in preamp socket replacement
- Often paired with stock or JJ power tubes
- Cheap way to experiment before a full retube
- Noticeable tone-shaping from just the V1 slot
- Sold individually, not a full kit
Electro-Harmonix EL84 / 12AX7 Tubes
A widely available, budget-friendly alternative for both the power and preamp stages.
- EL84 power tubes sold matched in pairs
- 12AX7 preamp tubes
- Consistent modern manufacturing
- Easy to find, competitively priced
- Reliable stock-like tone
- Less “boutique” reputation than JJ/Tung-Sol/TAD
Buying tips
- Vox amps run EL84 power tubes hard — plan on replacing them roughly once a year under regular gigging use.
- Preamp (12AX7) tubes last far longer; swapping only the V1 slot is a cheap way to test tonal changes.
- Buy power tubes as a matched pair, never mixed brands, to keep bias balanced.
As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.