
Preamplifiers
hARt Lab Preamplifiers are designed to be more than just a volume control - they are intended to be the centerpiece of the system. With a simple yet elegant design, they command the eyes' attention.
Not only are they beautiful, but they also serve as a streaming source, allowing owners to simplify their system while delivering world-class sound. Also included are digital inputs, phono inputs, and a headphone output.
As with all hARt Lab products, the chassis is designed with sound in mind, using multiple materials to create a component that lets you hear more of the signal and less of the chassis itself.
hARt Lab offers two preamplifiers: the Tune Two and Tune Four. The Tune Two is a reference-level preamplifier while the Tune Four offers even more for those who seek no compromise designs.















Simplicity without Compromise
With so many standard features, hARt Lab has bridged the gap for those who seek reference-level performance without having a stack of components to sort through. These design choices allow enthusiasts to compromise less in other areas (such as cables and racks) that often take up much more of the budget of a system than first realized.

Tune Two
Design:
Preamplifier Tubes:
Frequency Response:
Gain Sensitivity:
Standard Inputs:
Phono Inputs:
Digital Inputs:
Outputs:
Dimensions:
Weight:
Finishing Options:
Streaming Preamplifier
2x CV-181
5-120 kHz
21 dB
4 Pair Single Ended/RCA; WLAN; Ethernet LAN; 3 USB Ports
MM (40dB); MC (66 dB)
Resistive Load: 47k, 470, 220, 150, 100, 82, 70, 60
Capacitive Load: 0, 100, 220, 320
SPDIF (Coaxial and Optical)
Hybrid Pre-Out; Tube Direct Pre-Out; Headphone
8"x17"x15.5" (HxWxD)
26.5 lbs
Silver or Grey Chassis; Side panels in Walnut and various colors

Tune Four
Design:
Preamplifier Tubes:
Frequency Response:
Gain Sensitivity:
Standard Inputs:
Phono Inputs:
Digital Inputs:
Outputs:
Dimensions:
Weight:
Finishing Options:
Streaming Preamplifier
4x CV-181
5-140 kHz
21 dB
4 Pair Single Ended/RCA;
WLAN; Ethernet LAN;
3 USB Ports
MM (40dB); MC (66 dB)
Resistive Load: 47k, 470, 220, 150, 100, 82, 70, 60
Capacitive Load: 0, 100, 220, 320
SPDIF (Coaxial and Optical)
Hybrid Pre-Out; Tube Direct Pre-Out; Headphone
8"x17"x15.5" (HxWxD)
26.5 lbs
Silver or Grey Chassis; Side panels in Walnut and various colors












