J.C Acoustics UDP-5AKM AK4191+AK4499EXEQ Fully Balanced Discrete Headphone Amplifier & Preamplifier

Hardware Specifications:

DAC Chip: AK4191 + AK4499EXEQ

USB Controller: XMOS XU316

Bluetooth Chip: Qualcomm Bluetooth 5.4 Chip

Display: 1.5-inch LCD screen

Bluetooth Specifications

Bluetooth Reception: Bluetooth 5.4, SBC/AAC/aptX/aptX LL/aptX HD/aptX Adaptive/LDAC

Decoding Specifications

USB DAC: 768kHz/32bit; DSD512 (Native)

Coaxial Input: 192kHz/24bit

Optical Input: 192kHz/24bit

Headphone Output

Output Impedance <0.10Ω, Peak Output Current:

Output Power 1: L+R 4000mW+4000mW (16Ω Single-Ended · THD+N<1%, High Gain Mode)

Output Power 2: L+R 16000mW+16000mW (16Ω balanced · THD+N<1%, High Gain Mode) 

Output power 3: L+R 2200mW+2200mW (32Ω single-ended · THD+N<1%, High Gain Mode)

Output power 4: L+R 8800mW+8800mW (32Ω balanced · THD+N < 1%, High Gain Mode)

Output Power 5: L+R 220mW+220mW (300Ω single-ended · THD+N < 1%, High Gain Mode)

Output Power 6: L+R 850mW+850mW (300Ω balanced · THD+N < 1%, High Gain Mode)

Line Output

RCA Output: L+R=2.5Vrms+2.5Vrms (1kHz)

XLR Output: L+R=5Vrms+5Vrms (1kHz)

Audio Specifications

Frequency Response: 20Hz–20kHz · <-1dB

Noise Floor: <5uV (A-weighted)

THD+N: <0.00030% (1kHz)

Dimensions: Approx. 239x201x50mm

Unit Weight: Approx. 3kg

With Packaging: Approx. 4kg