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Stuck In the House? Tune out the world with the silky Woo Audio WA7 Fireflies!

1st Generation Was Voted Best DAC by Lifehacker — “WA7 ‘Fireflies’ are fully featured DACs with world-class vacuum tube amplifiers.”

Newly designed, 2^nd generation, integrated DAC and headphone amplifier with improved vacuum tube amplifier circuitry. There are no semiconductors used anywhere in the amplification path. This is hollow state all the way.

Woo Audio says, “WA7 “Fireflies” Amp/DAC is a combination of high performance vacuum tube headphone amplifier with a built-in USB Digital-to-Analog Converter. It is a pure tube design, utilizing 6C45 tubes in a Class A, single-ended topology with transformer coupled outputs.” The 6C45 triode acts as both driver and power tube.

The D/A converter can automatically handle of up to 24-bit 384 kHz (DXD) sampling rates as well as up to double speed DSD (128DSD or DSD2). W7 Fireflies maintains pure (bit perfect) data integrity via an ultra-low jitter USB 2.0 implementation. The RCA connectors on the back can be used either as RCA analog inputs or USB DAC preamp outputs.

No scratches, chips or dents. Runs well. Price is US$549.00 firm. This is a crazy good deal so sorry, no bargaining. Shipping and insurance not included, buyer pays for shipping and insurance.

The high quality construction features include:
• Two nickel alloy-core output transformers
• No steel — all-aluminum chassis — no screws visible from any viewing angles
• External in–line linear solid state power supply
• Custom built toroidal power transformer
• Over 3 pounds of high clarity glass for tube protection & thermal mass
• Multi-layer military grade PCBs
• Dedicated ⅛" port just for sensitive in-ear-monitors
• Separate ¼" TRS jack for full sized & higher impedance headphones
• USB Audio Class 2.0
• Teflon tube sockets
• ESS SABRE Reference DAC (ES9018K2M)
• XMOS xCORE-AUDIO asynchronous USB
• Automatic no load/open load protection
• High/Low output impedance toggle on back panel
• Back panel switch for USB input, RCA input & RCA output
• Plug & Play with macOS & Windows 10 Creator or newer; Windows driver available directly from Woo Audio

Despite its compact size, “Fireflies” is a supple powerhouse, with the capacity to drive most any demanding audiophile headphone. Of course, “Fireflies” can also be used as a stand-alone DAC.

Dimensions:
AMP - 4.8" L x 4.8" W x 5.1" H with glass
PSU - 7" L x 3.5" W x 2.2" H

Weight:
AMP - 5.3 lbs / 2.4kg
Glass - 3.3 lbs / 1.5kg
PSU - 2.8 lbs / 1.4kg