Whitestone Audio P331 EVL Tube Loading Amplifier

Aggressive Tube Loading Amplifier for Professional Engineers Seeking a Bold, Forward Sound

The Whitestone Audio P331 EVL Tube Loading Amplifier is the “EVL twin” of the original P331 WH, offering the same high-fidelity hybrid vacuum tube/solid-state design, but with a more direct and aggressive character. Engineered to push its 6SN7 vacuum tubes further, the P331 EVL delivers a forward, saturated sound while maintaining precision and elegance, making it perfect for engineers looking for a more pronounced harmonic presence without sacrificing audio integrity.

A Bolder Approach to Tube Circuitry

While maintaining the same 6SN7 vacuum tubes as the original P331, the P331 EVL pushes them harder, creating a more forward and aggressive sonic character. This amplifier brings a distinct edge to your sound, making it ideal for applications where a stronger presence and saturation are desired, while still being appropriate for mastering-level audio fidelity.

Enhanced Harmonic Control with LOADING

The LOADING circuit in the P331 EVL operates similarly to the original, but with a more pronounced effect. The “CLEAN” feedback mode is tighter, and the “BLOOM” feedforward mode introduces even more harmonic richness. This amplified control allows for more bold tonal shaping and brings out the more saturated characteristics of the 6SN7 tubes.

Intensified Transformer Section

The P331 EVL drives significantly more current through its transformers, forcing them into saturation more quickly than the P331 WH. This produces a thicker, more punchy low-end presence, making it perfect for mixes that require thrust and clarity without muddiness.

LIFT Circuit and Auto-Padding

The LIFT circuit on the EVL enhances frequencies similarly to the WH model, but with the LOADING section’s stronger harmonic influence, the high and low frequency boosts sound more pronounced. The EVL’s auto-padding feature allows seamless adjustment of gain levels, letting you crank the LOADING section to extreme settings while keeping control of the output.

Key Features:

• 6SN7 vacuum tubes driven harder for aggressive harmonic content
• LOADING Circuit with more saturated “CLEAN” and “BLOOM” modes
• Auto-Padding feature with PRE, POST, and OPEN settings for flexible gain staging
• LIFT Circuit with enhanced high and low frequency boosts
• More current-driven transformer output for punchier low-end presence
• Fully repeatable digital control for precise settings recall
• Hard-wire bypass for individual sections and global bypass