{"id":26396,"date":"2026-04-18T17:52:33","date_gmt":"2026-04-18T16:52:33","guid":{"rendered":"https:\/\/gamerunlocked.pt\/product\/fosi-audio-k7-ak4493s-desktop-dac-amp-2100mw-balanced-bluetooth-aptx-hd\/"},"modified":"2026-04-18T18:11:01","modified_gmt":"2026-04-18T17:11:01","slug":"fosi-audio-k7-ak4493s-desktop-dac-amp-2100mw-balanced-bluetooth-aptx-hd","status":"publish","type":"product","link":"https:\/\/gamerunlocked.pt\/en\/product\/fosi-audio-k7-ak4493s-desktop-dac-amp-2100mw-balanced-bluetooth-aptx-hd\/","title":{"rendered":"Fosi Audio K7 \u2013 AK4493S Desktop DAC\/AMP, 2100mW Balanced, Bluetooth aptX HD"},"content":{"rendered":"\t\t
\n\t\t\t\t
\n\t\t\t\t\t
\n\t\t
\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t
\n\t\t\t\n\t\t\t
\n

Fosi Audio K7 \u2013 AK4493S Desktop DAC\/AMP, 2100mW Balanced, Bluetooth aptX HD<\/h2>\n

The Fosi Audio K7 is a desktop DAC and headphone amplifier built for the overlap between gaming and serious listening. It runs AKM's AK4493SEQ VELVET SOUND DAC, Texas Instruments' TPA6120A2 amplifier, and Qualcomm's QCC3031 Bluetooth chip \u2014 components found in dedicated audiophile hardware \u2014 in a compact aluminum chassis that fits under a monitor and works directly with PS5, Switch, and PC without drivers or configuration. <\/p>\n

Chipset Architecture<\/h3>\n

The AK4493SEQ is AKM's current flagship stereo DAC, capable of PCM decoding to 384kHz\/32bit and DSD256 via USB, with 123dB dynamic range and 0.00007% THD+N at the chip level. Upstream, the XMOS XU208 handles USB audio processing \u2014 it's been the reliable standard for desktop USB audio for years, ensuring stable high-res transmission and clean USB-to-audio handoff. <\/p>\n

The amplifier section uses a dual-mono TPA6120A2 configuration, paired with OPA1612 op-amps for the signal path. The result is 600mW @32\u03a9 single-ended and 2,100mW @32\u03a9 balanced \u2014 enough to drive Hifiman planars, Sennheiser HD 800, and everything between without hitting the ceiling. Noise floor measures \u22642.5\u03bcV single-ended and \u22646.5\u03bcV balanced: no audible hiss on IEMs, no background noise on sensitive headphones. <\/p>\n

Balanced Output \u2014 What It Actually Means Here<\/h3>\n

The K7 runs fully balanced circuitry from DAC to headphone output \u2014 it's not a split-from-single-ended design. The 4.4mm output delivers \u22640.0002% THD with a dual-mono amp stage. For headphones with detachable cables, using a 4.4mm terminated cable will give you the full balanced signal path, lower crosstalk, and the power headroom that the amp is designed around. <\/p>\n

Inputs & Connectivity<\/h3>\n

Front panel: 3.5mm mic input (adjustable gain, UAC 1.0 mode required), 3.5mm single-ended output, 4.4mm balanced output. Rear panel: USB-C (PCM 384kHz\/DSD256), Optical (PCM 384kHz\/DSD256), Coaxial (PCM 384kHz\/DSD256), Bluetooth 5.0 antenna, RCA outputs. The included 3.5mm headphone splitter converts a 4-pole gaming headset into separate headphone and mic connections \u2014 no additional adapter needed for existing gaming setups. <\/p>\n

PS5 Pro and PS5 work via USB-C in UAC 1.0 mode (plug-and-play). UAC 2.0 requires the Windows driver and disables microphone input. XMOS firmware is field-upgradeable via USB-C. <\/p>\n

Controls & Display<\/h3>\n

Two large knobs: left for volume (with long-press gain toggle), right for bass\/treble\/menu navigation. Five shortcut buttons for input switching, bypass, and display control. The 1.5\" monochrome LCD shows input source, sample rate, and current settings in real time \u2014 you know exactly what the K7 is doing without guessing. Bypass mode flattens the signal path in under two seconds. <\/p>\n

Founder's Take<\/h3>\n

The K7 is marketed as a gaming DAC\/AMP \u2014 but that label undersells it. This is a device built for gamers that ends up being a definitive solution for audiophiles too. That's what happens when you put an AK4493S, a TPA6120, and 2,100mW of balanced output into a unit under 220\u20ac. <\/p>\n

For gaming: the neutral, wide soundstage means positional audio in FPS reads correctly \u2014 footsteps, directional cues, ambience all land where they should. Hardware bass and treble controls let you tune for immersion or competitive clarity without software or DSP latency. PS5 is plug-and-play via UAC 1.0, mic passthrough included. <\/p>\n

The AK VELVET SOUND signature \u2014 neutral, clear, non-fatiguing \u2014 works equally for gaming sessions and serious listening. At this price, it's the most complete answer to the gamer-audiophile overlap we've put in the catalogue. <\/p>\n

Honest note: no LDAC, and mic input requires UAC 1.0 \u2014 incompatible with hi-res USB audio simultaneously on PC.<\/p>\n

IN THE PACKAGE<\/h4>\n
    \n
  • 1\u00d7 Fosi Audio K7 DAC\/AMP<\/li>\n
  • 1\u00d7 DC 12V 2A Power Supply<\/li>\n
  • 1\u00d7 USB-A\/C to USB-C Cable<\/li>\n
  • 1\u00d7 Bluetooth Antenna<\/li>\n
  • 1\u00d7 3.5mm Headphone & Mic Splitter<\/li>\n
  • 1\u00d7 User Manual<\/li>\n<\/ul>\n<\/div>\n\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
    \n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t\t\t
    \n\t\t\t\n\t\t\t\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    SPECIFICATION<\/th>\nDETAILS<\/th>\n<\/tr>\n<\/thead>\n
    Model<\/td>\nFosi Audio K7<\/td>\n<\/tr>\n
    Type<\/td>\nDesktop DAC\/Headphone Amplifier<\/td>\n<\/tr>\n
    DAC Chip<\/td>\nAKM AK4493SEQ (VELVET SOUND)<\/td>\n<\/tr>\n
    USB Processor<\/td>\nXMOS XU208<\/td>\n<\/tr>\n
    Headphone Amp<\/td>\nTexas Instruments TPA6120A2 (dual-mono)<\/td>\n<\/tr>\n
    Op-Amp<\/td>\nOPA1612<\/td>\n<\/tr>\n
    Bluetooth Chip<\/td>\nQualcomm QCC3031<\/td>\n<\/tr>\n
    Max Decoding (USB)<\/td>\nPCM 384kHz \/ 32bit \u00b7 DSD256<\/td>\n<\/tr>\n
    Max Decoding (Optical\/Coax)<\/td>\nPCM 384kHz \/ 32bit \u00b7 DSD64\/128\/256<\/td>\n<\/tr>\n
    Bluetooth<\/td>\n5.0 \u00b7 aptX HD \u00b7 aptX LL \u00b7 aptX \u00b7 SBC \u00b7 AAC \u00b7 PCM 24bit\/48kHz \u00b7 Range \u226413m<\/td>\n<\/tr>\n
    Output Power (3.5mm SE)<\/td>\n600mW @32\u03a9<\/td>\n<\/tr>\n
    Output Power (4.4mm BAL)<\/td>\n2,100mW @32\u03a9<\/td>\n<\/tr>\n
    THD (SE \/ RCA)<\/td>\n\u22640.0005%<\/td>\n<\/tr>\n
    THD (Balanced)<\/td>\n\u22640.0002%<\/td>\n<\/tr>\n
    SNR<\/td>\n122dB (3.5mm SE) \u00b7 121dB (4.4mm BAL)<\/td>\n<\/tr>\n
    Noise Floor<\/td>\n\u22642.5\u03bcV (SE) \u00b7 \u22646.5\u03bcV (balanced)<\/td>\n<\/tr>\n
    Dynamic Range<\/td>\n121dB<\/td>\n<\/tr>\n
    Frequency Response<\/td>\n20Hz \u2013 20kHz (\u00b10.1dB)<\/td>\n<\/tr>\n
    Inputs<\/td>\nUSB-C \u00b7 Optical \u00b7 Coaxial \u00b7 Bluetooth 5.0 \u00b7 3.5mm Mic<\/td>\n<\/tr>\n
    Outputs<\/td>\n3.5mm SE \u00b7 4.4mm Balanced \u00b7 RCA<\/td>\n<\/tr>\n
    UAC Mode<\/td>\nUAC 1.0 (PS5\/mic) \u00b7 UAC 2.0 (PC hi-res)<\/td>\n<\/tr>\n
    Gaming Compatibility<\/td>\nPS5 Pro \u00b7 PS5 \u00b7 Nintendo Switch \u00b7 PC \u00b7 Mac \u00b7 Linux<\/td>\n<\/tr>\n
    Gain<\/td>\nHigh \/ Low (switchable via knob)<\/td>\n<\/tr>\n
    EQ Controls<\/td>\nBass \u00b7 Treble \u00b7 Bypass mode<\/td>\n<\/tr>\n
    Display<\/td>\n1.5\" LCD monochrome<\/td>\n<\/tr>\n
    Controls<\/td>\n2 large multi-function knobs \u00b7 5 shortcut buttons<\/td>\n<\/tr>\n
    Protection<\/td>\nOverheat \u00b7 Overload \u00b7 Overcurrent<\/td>\n<\/tr>\n
    Chassis<\/td>\nCNC aluminum alloy \u00b7 Anodized \u00b7 Angled ergonomic design<\/td>\n<\/tr>\n
    Power Input<\/td>\nDC 12V 2A (included)<\/td>\n<\/tr>\n
    Firmware<\/td>\nXMOS upgradeable via USB-C<\/td>\n<\/tr>\n
    Product Weight<\/td>\n~530g<\/td>\n<\/tr>\n
    Dimensions<\/td>\n~150 \u00d7 90 \u00d7 30mm<\/td>\n<\/tr>\n
    Available Colors<\/td>\nBlack \u00b7 White<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

    Key Features:<\/strong><\/h4>\n
      \n
    • AK4493SEQ VELVET SOUND + TPA6120A2 \u2014 The Chipset That Matters<\/strong> \u2013 AKM’s AK4493S delivers 123dB dynamic range with 0.00007% THD+N at the DAC stage. Texas Instruments’ TPA6120A2 amp drives the output with a dual-mono setup \u2014 up to 600mW @32\u03a9 single-ended and 2,100mW @32\u03a9 balanced. That’s enough headroom for planar magnetics and high-impedance headphones without clipping. <\/li>\n
    • 4.4mm Balanced + 3.5mm SE Headphone Outputs<\/strong> \u2013 Both outputs on the front panel. The balanced output runs fully balanced circuitry (\u22640.0002% THD), not just a split from single-ended. Noise floor of \u22646.5\u03bcV on balanced and \u22642.5\u03bcV on single-ended \u2014 audible silence between tracks. <\/li>\n
    • Every Input You Actually Need<\/strong> \u2013 USB-C (PCM 384kHz\/32bit + DSD256), Optical, Coaxial, Bluetooth 5.0 (aptX HD\/LL\/SBC\/AAC), and 3.5mm mic input with adjustable gain. PS5 Pro, PS5, and Switch compatible via UAC 1.0 \u2014 plug in, no setup required. <\/li>\n
    • Bass, Treble & Bypass \u2014 Hardware EQ Without Software<\/strong> \u2013 Adjustable bass and treble via the right knob, no app or driver needed. Bypass mode reverts to a flat signal path instantly. Useful for matching different headphone signatures without EQ software running in the background. <\/li>\n
    • Full Metal, 530g \u2014 Built to Stay on the Desk<\/strong> \u2013 CNC-machined aluminum alloy chassis, angled for ergonomic top-down control. 1.5″ LCD displays input, sample rate, and active settings in real time. Heavy enough to take plugging and unplugging headphones without shifting. <\/li>\n<\/ul>\n","protected":false},"featured_media":26397,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[726],"product_tag":[1947,1941,1945,1942,1944,1939,1943,1940,1948,1946],"class_list":{"0":"post-26396","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-dac-amp","7":"product_tag-4-4mm-balanced-output","8":"product_tag-ak4493s-dac","9":"product_tag-aptx-hd-dac","10":"product_tag-balanced-headphone-amp","11":"product_tag-bluetooth-dac","12":"product_tag-desktop-dac-amp","13":"product_tag-gaming-dac-amp","14":"product_tag-headphone-amplifier","15":"product_tag-ps5-dac-amp","16":"product_tag-usb-dac-desktop","17":"pa_brand-fosi-audio","19":"first","20":"instock","21":"taxable","22":"shipping-taxable","23":"purchasable","24":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/gamerunlocked.pt\/en\/wp-json\/wp\/v2\/product\/26396","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gamerunlocked.pt\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/gamerunlocked.pt\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/gamerunlocked.pt\/en\/wp-json\/wp\/v2\/comments?post=26396"}],"version-history":[{"count":1,"href":"https:\/\/gamerunlocked.pt\/en\/wp-json\/wp\/v2\/product\/26396\/revisions"}],"predecessor-version":[{"id":26404,"href":"https:\/\/gamerunlocked.pt\/en\/wp-json\/wp\/v2\/product\/26396\/revisions\/26404"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/gamerunlocked.pt\/en\/wp-json\/wp\/v2\/media\/26397"}],"wp:attachment":[{"href":"https:\/\/gamerunlocked.pt\/en\/wp-json\/wp\/v2\/media?parent=26396"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/gamerunlocked.pt\/en\/wp-json\/wp\/v2\/product_brand?post=26396"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/gamerunlocked.pt\/en\/wp-json\/wp\/v2\/product_cat?post=26396"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/gamerunlocked.pt\/en\/wp-json\/wp\/v2\/product_tag?post=26396"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}