PrimaLuna
PrimaLuna EVO 400 Tube Preamplifier | The Grid HiFi
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PrimaLuna EVO 400 Tube Preamplifier | The Grid HiFi
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Shipping Information
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Customer Support
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FAQ’s
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Overview
PrimaLuna EVO 400 Tube Preamplifier
Dual-mono tube architecture. Balanced connectivity. Precision analog volume control.
The PrimaLuna EVO 400 is a high-end vacuum tube preamplifier engineered for listeners who want the character of tubes with the flexibility of a modern reference system. Its dual-mono design features separate toroidal power transformers, two 5AR4 rectifier tubes, and six 12AU7 tubes.
Premium Takman resistors, DuRoch tinfoil capacitors, point-to-point wiring, and a motorized ALPS Blue Velvet volume control complete a design focused on signal integrity. With RCA and XLR connections, Home Theater Bypass, and remote operation, the EVO 400 is ready to anchor a serious two-channel system.
Key Features
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Dual-mono design: Separate power supplies for the left and right channels.
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Tube rectification: Two 5AR4 rectifier tubes alongside six 12AU7 signal tubes.
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Balanced connectivity: Two pairs of stereo XLR inputs and one pair of stereo XLR outputs.
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AC Offset Killer: Designed to reduce transformer noise caused by DC offset on the AC line.
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SuperQuiet inputs: Rear-mounted sealed relays provide source selection.
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Premium analog construction: ALPS Blue Velvet volume control, Takman resistors, DuRoch capacitors, and point-to-point wiring.
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Home Theater Bypass: Integrates into a combined stereo and home cinema system.
Technical Specifications
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Specification |
PrimaLuna EVO 400 |
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Type |
Vacuum tube line preamplifier |
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Circuit design |
Dual mono |
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Tube complement |
6 × 12AU7, 2 × 5AR4 |
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Output voltage |
2V per channel |
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Frequency response |
18Hz–38kHz ±1dB |
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Extended frequency response |
12Hz–75kHz ±3dB |
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Total harmonic distortion |
Less than 0.5% at 2V |
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Signal-to-noise ratio |
93dB / 98dB A-weighted |
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Input impedance |
220kΩ |
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Output impedance |
256Ω |
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Input sensitivity |
650mV |
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Gain |
9.7dB |
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Inputs |
3 stereo RCA pairs, 2 stereo XLR pairs, 1 Home Theater RCA pair |
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Outputs |
Stereo RCA, stereo XLR, RCA tape output |
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Power consumption |
61W |
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Dimensions (W × H × D) |
15.2 × 8.1 × 15.9 in. |
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Net weight |
52.8 lb |
Complete Your System
Pair the EVO 400 with a PrimaLuna power amplifier or another compatible high-end amplifier. The Grid HiFi can help you select the right components, match your loudspeakers, and build a complete two-channel system.
FAQs
Please read our FAQs page to find out more.
Do you price match?
Yes. We match any authorised dealer, including big-box retailers. If you find the same product at a lower price, contact us and we'll match it.
Do you offer free shipping?
Yes — free shipping on every order, with 2-day delivery available on most products. Easy returns and exchanges are included.
Where is your showroom?
We're at 6362 Alder Drive, Houston, Texas. The showroom lets you hear and compare reference-level systems in person before making any decisions. If you're considering a larger purchase or installation, it's well worth the visit.
Can I buy online without visiting the showroom?
Yes. The full product range is available through the online store with free nationwide shipping. For more complex system builds, speaking with one of our advisers first tends to lead to a better result.
Do you offer financing?
Yes. Special financing is available through the BrandSource Credit Card for qualifying purchases, allowing you to spread payments over time with no annual fee. Promotional rebate savings are also available periodically. See the financing page for full details.
Do you install systems as well as sell equipment?
Yes — installation is central to what we do. We design and install whole-home audio and video, home theaters, media rooms, outdoor audio, lighting and motorised shades, and full smart home automation.
Do you provide support after installation?
Yes. We provide ongoing service and support to ensure systems continue performing as intended — not just on installation day, but over the long term.