PHATLab Sassy User manual

PHATLab Audio
Sassy
Single-Ended Triode / Solid-State
Hybrid Portable Headphone Amplifier
User’s Manual

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Congratulations and thanks for choosing PHATLab’s single-ended triode/Solid-State hybrid amplifier
Sassy as companion of your premium headphones. Sassy is one of a kind amplifier based on directly
heated triode and solid-state output stage to provide unprecedented musicality and driving
capability for a wide range of headphones up to 600-ohm impedance. Sassy is based on pure analog
design and rugged for you daily usage. When paired with top-notched music source, you are ready
to enjoy sensational music performance as on best single-ended stereo system.

Features
Directly heated triode with single-ended circuit topology
High power full discrete direct energy solid-state output stage
Up to 20V and 1A output capability
Zero global feedback design
Hand selected military grade subminiature valve JAN6418
Military and audio grade passive components
Recommended for headphones with 30 –600 ohm impedance
Instant-on without warm up time
5V micro-B USB charging port
Over 10-hour operation on battery and fully charge within 3-hour

Contents
Precaution
Front Panel
Back Panel & Display
Connections
Playback & Operations
Specifications

Precaution
Sassy is designed with highest quality components and handcrafted to extreme precision for
extended service lifespan. Still, users are advised to be cautious on usage to avoid damage due to
carelessness.
1. Avoid high-G force shock on Sassy. Due to nature of vacuum tubes, extreme shock may lead to
microphonics noise at output
2. Microphonics is the ringing noise induced by vibrations of vacuum tubes. Though
countermeasure has been taken to minimize it. When happens, keep device steady for few
seconds and the noise shall fade away soon. If noise extended, keep device steady and turn
Sassy off then back on.
3. Please recharge battery before use. It takes 3-hour to fully charge when battery is empty
4. Sassy, same as all electronic devices, shall avoid high humidity or water-spill
5. Only use certified 5V USB charger and cable for battery recharge

6. When the sound quality is abnormal or distorted, do the following checklist
If low battery light is on, charge immediately
Lower the volume to avoid clipping or overload on amplifier

Front Panel
1. Power switch and Volume knob
2. 3.5Φphone jack for music input
3. 1/4”(6.3Φ) stereo phone jack for headphone output
4. Power on (green) and low battery (red) indicators
1
2
3
4

Back Panel
1. Micro-B USB port for 5V DC supply
2. Recharge indication (On during charging and Off after fully charged)
1
2

Connections
Connecting music source
Smartphone or DAP
Analog / phone out

Connecting headphone
Tip: Insert plug before power on can avoid microphonics ringing noise

Connecting USB cable for battery recharge
USB charger
Power Bank
Micro-B
Type A

Playback & Operations
1. Connecting music source
2. Connecting headphone
3. Turn on power by rotating volume knob clockwise away from off position. A click sound and
power green light indicate power on.
4. Gradually increasing volume by rotating knob clockwise up to comfortable sound level

Specifications
Frequency Response: 10 Hz –100 kHz (-3dB)
Output power: 180 mW + 180 mW (300 ohm)
1000 mW + 1000 mW (30 ohm)
Recommended impedance: 30 ohm –600 ohm
Power supply: 5V/1A via micro B USB port
Operation time (on battery): Approx. 10 hours (depends on headphone impedance)
Charging time (>1A supply): Approx. 3 hours
Dimensions: 119 mm x 93 mm x 23 mm
Net weight: 270 gram

PHATLab Audio Co. Ltd.
www.phatlabaudio.com