{"product_id":"black-hpa-a1000-mk3-balanced-headphone-amplifier-relay-volume-control-oled-hd-screen-preamplifier","title":"Black HPA-A1000 MK3 Balanced Headphone Amplifier Relay Volume Control OLED HD Screen Preamplifier","description":"\u003cp\u003e\u003cb\u003eBlack HPA-A1000 MK3 Balanced Headphone Amplifier Relay Volume Control OLED HD Screen Preamplifier\u003cbr\u003e\u003cbr\u003eKey Features:\u003c\/b\u003e\u003cbr\u003e- 3 sealed ring transformers for TALEMA (2 x amplification circuits, 1 x control circuit).\u003cbr\u003e- The left and right channels are fully independently powered, with a 160000uF large electrolysis filter.\u003cbr\u003e- Discrete voltage regulator power supply.\u003cbr\u003e- 128 level relay volume control, large screen OLED dynamic display.\u003cbr\u003e- Relay controls 3 analog stereo inputs (1 XLR, 2 RCA).\u003cbr\u003e- 2 analog stereo line outputs (1 XLR, 1 RCA).\u003cbr\u003e- Full DC amplifier circuit, accurately reproduces signals.\u003cbr\u003e- 4-channel high-power (7W\/50ohms), high swing voltage (32VRMS\/600ohms), BTL balanced amplification.\u003cbr\u003e- Full function headphone output port (1 x 4-core XLR, 2 x 3-core XLR, 2 x TRS, 1 x 4.4mm).\u003cbr\u003e- Headphone amplifier output, independent control of front-end output, independent adjustment of gain, direct volume of front-end output.\u003cbr\u003e- Full function protection circuit (overvoltage, overcurrent, zero drift, delayed output).\u003cbr\u003e- Optional remote control (input\/output selection, volume control, mute).\u003cbr\u003e\u003cbr\u003e\u003cb\u003eMechanical Parameter:\u003c\/b\u003e\u003cbr\u003e- Material: 15mm and 5mm (thickness) anodized aluminum for front panel and back panel; 15mm (thickness) aluminum profile heat dissipation ribs (8mm baseboard + 7mm heat dissipation ribs; 4mm anodized aluminum for upper and lower plate\u003cbr\u003e- Chassis size: 398 x 295 x 72mm\u003cbr\u003e- Net weight: 7.6kg\u003cbr\u003e\u003cbr\u003e\u003cb\u003eConfiguration:\u003c\/b\u003e\u003cbr\u003e- Input op amp: OP01-BP discrete op amp x 4\u003cbr\u003e- Volume buffering: OP01-BP discrete op amp x 2\u003cbr\u003e- Headphone amplifier gain: NE5532AP integrated op amp x 2\u003cbr\u003e- Preamplifier output: LME49720NA integrated op amp 2 x 2\u003cbr\u003e- Headphone amplifier output: LME49990MAX integrated op amp x 4\u003cbr\u003e- Regulated power supply: PW03-DD discrete power supply\u003cbr\u003e- Note: the op amp power supply voltage of this machine is ±18V. If you need to replace the operational amplifier yourself, please confirm whether the withstand voltage meets the requirements first.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eTechnical Parameter:\u003c\/b\u003e\u003cbr\u003e\u003cu\u003eInput Parameter:\u003c\/u\u003e\u003cbr\u003e- Stereo analog input interface: 1 x XLR female (balanced input); 2 x RCA (single-end input)\u003cbr\u003e- Maximum input voltage: +21dBu (about 9.75V RMS)\u003cbr\u003e- Input impedance: 10kohms\u003cbr\u003e\u003cbr\u003e\u003cu\u003eLine Output Parameter:\u003c\/u\u003e\u003cbr\u003e- Stereo analog line output interface: 1 x XLR male (balanced output); 1 x RCA (single-end output)\u003cbr\u003e- Line output gain: -12\/-6\/0\/+6\/+12 dBr\u003cbr\u003e- Maximum output voltage: +21dBu (about 9.75V RMS)\u003cbr\u003e- Output impedance: \u0026lt; 1ohm\u003cbr\u003e\u003cbr\u003e\u003cu\u003eHeadphone Amplifier Parameter:\u003c\/u\u003e\u003cbr\u003e- Nominal input sensitivity: +6dBu (about 1.55V RMS)\u003cbr\u003e- Amplifier gain: -4dB for RCA; +2dB for XLR\u003cbr\u003e- Pre-gain: -15\/-12\/-6\/0\/+6\/+12\/+18\/+24 dBr\u003cbr\u003e- Frequency range: 5Hz - 250kHz (-0.5dB)\u003cbr\u003e- Output impedance: 0.1ohm for unbalanced output; 0.2ohm for balanced output\u003cbr\u003e- Damping factor, load of 50ohms: 500 for unbalcned output; 250 for balanced output\u003cbr\u003e- Dynamic range: \u0026gt; 135dB (A-weighted)\u003cbr\u003e- Noise: \u0026lt; -104dBu (A-weighted)\u003cbr\u003e- THD+N:\u003cbr\u003e  1kHz, 2 x 10V, 100ohms (1W): \u0026lt;-104dB\/\u0026lt;0.00063%\u003cbr\u003e  1kHz, 2 x 4V, 32ohms (0.5W): \u0026lt;-103dB\/\u0026lt;0.00071%\u003cbr\u003e- Crosstalk: -105dB for 1kHz; -103dB for 15kHz\u003cbr\u003e- Headphone output interface: 1 x 4-Pin XLR; 1 x 4.4mm, 2 x 1\/4” (6.3mm) headphone port; 2 x 3-Pin XLR headphone port (shared composite socket with 6.3mm TRS)\u003cbr\u003e\u003cbr\u003e\u003cu\u003eMaximum Output Level (1kHz, THD+N \u0026lt; 0.1%):\u003c\/u\u003e\u003cbr\u003e- 600ohms: 32.4V RMS, 1750mW\u003cbr\u003e- 300ohms: 29.5V RMS, 2900mW\u003cbr\u003e- 100ohms: 25.6V RMS, 6500mW\u003cbr\u003e- 50ohms: 18.8V RMS, 7000mW\u003cbr\u003e- 32ohms: 13.4V RMS, 5600mW\u003cbr\u003e- 16ohms: 7.2V RMS, 3200mW\u003cbr\u003e- 8ohms: 3.6V RMS, 1600mW\u003cbr\u003e- 4ohms: 1.8V RMS, 820mW\u003cbr\u003e\u003cbr\u003e\u003cu\u003ePower Supply Parameters:\u003c\/u\u003e\u003cbr\u003e- Power supply voltage: AC 230V\/115V (optional, default 230V)\u003cbr\u003e- Maximum power consumption: 60VA\u003cbr\u003e\u003cbr\u003e\u003cb\u003ePerformance:\u003c\/b\u003e\u003cbr\u003e\u003cu\u003eOutput power:\u003c\/u\u003e\u003cbr\u003e- Under low impedance loads (such as 50Ω), the output power can reach up to 7000mW (7W), indicating that the amplifier can drive most high impedance and low impedance headphones.\u003cbr\u003e- Under high impedance loads (such as 600Ω), the output power is still very strong at 1750mW (1.75W).\u003cbr\u003e\u003cbr\u003e\u003cu\u003eOutput voltage:\u003c\/u\u003e\u003cbr\u003e- Under a 600Ω load, the output voltage can reach up to 32.4VRMS, making it suitable for driving high impedance headphones.\u003cbr\u003e- Under a 4Ω load, the output voltage is 1.8VRMS, which is suitable for driving low impedance headphones.\u003cbr\u003e\u003cbr\u003e\u003cu\u003eApplicability:\u003c\/u\u003e\u003cbr\u003e- This amplifier can adapt to headphones ranging from 4Ω to 600Ω, covering a wide range from low impedance in ear headphones to high impedance open headphones.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eSummary:\u003c\/b\u003e\u003cbr\u003e- This is a high-performance headphone amplifier with extremely high output power (up to 7000mW) and wide load adaptability (4Ω to 600Ω).\u003cbr\u003e- Its low distortion (THD+N \u0026lt;0.1%) and high output voltage (up to 32.4VRMS) enable it to drive various high impedance and low impedance headphones.\u003cbr\u003e- The power supply design supports global voltage (115V\/230V), with low power consumption (up to 50VA), suitable for long-term use.\u003cbr\u003e- The mechanical design uses high-quality aluminum and steel plates, combining aesthetics and durability.\u003cbr\u003e- This device is very suitable for professional audio engineers, enthusiasts, and users who have extremely high requirements for sound quality and driving capabilities.\u003cbr\u003e- It is a high-performance headphone amplifier with extremely low noise, distortion, and output impedance, suitable for driving various high-sensitivity or high impedance headphones.\u003cbr\u003e- Its wide gain adjustment range (-15dBr to +24dBr) and balanced\/unbalanced input-output options make it suitable for a variety of audio devices and headphones.\u003cbr\u003e- High dynamic range (\u0026gt;135dB) and low crosstalk (-105dB) ensure excellent sound quality performance, suitable for users with extremely high sound quality requirements.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eDiscrete Regulated Power Supply Module:\u003c\/b\u003e\u003cbr\u003e- Independent regulated power supply of left and right channel.\u003cbr\u003e- 1PCS discrete regulated module of each channel\u003cbr\u003e- Each module output positive and negative 2-channel power supply (default ±18V)\u003cbr\u003e- Input PSRR: -124dB\u003cbr\u003e- Output noise: 3.2uV RMS (20kHz at 5 Vo)\u003cbr\u003e- Load regulation: 2mV\u003cbr\u003e- Output current: 1020mA\u003cbr\u003e\u003cbr\u003e\u003cb\u003eFor Nichicon UFW Series Audio Capacitors (3300uF x 20pcs, 2200uF x 44pcs):\u003c\/b\u003e\u003cbr\u003e- Parallel connection of multiple capacitors has the following advantages:\u003cbr\u003e  1. Increase total capacity and transient response\u003cbr\u003e  2. Reduce equivalent series resistance (ESR)\u003cbr\u003e  3. Improve reliability and flexibility\u003cbr\u003e  4. Disperse heat loss and improve stability\u003cbr\u003e\u003cbr\u003e\u003cb\u003e128 Levels Relay Volume Control (0-127):\u003c\/b\u003e\u003cbr\u003e1. For TE IM03 series signal relay: PdRu (palladium nail) + Au (gold) alloy contact, contact resistance \u0026lt; 50mohms\u003cbr\u003e2. For VISHAY BC MMA series high-precision low-temperature drift film resistor:\u003cbr\u003e  Resistance tolerance: ± 1%\u003cbr\u003e  Temperature coefficient: ±25ppm\/K\u003cbr\u003e3. Large OLED high-definition display screen, real-time display of current volume value and working status\u003cbr\u003e\u003cbr\u003e\u003cb\u003eRelay Volume Control Advantages:\u003c\/b\u003e\u003cbr\u003e- High consistency of the audio channel, no channel imbalance problem in low volume state.\u003cbr\u003e- Pure sound quality: Relays and resistor networks have little impact on the signal and can maintain high fidelity of the audio signal.\u003cbr\u003e- Non contact noise: There is no mechanical contact during switching, avoiding the noise that may be generated by traditional potentiometers.\u003cbr\u003e- High reliability: The relay has a long lifespan and is suitable for frequent operation.\u003cbr\u003e- Precise control: By combining multiple relays, precise volume adjustment can be achieved.\u003cbr\u003e- No wear and tear: no mechanical contact, stable long-term performance.\u003cbr\u003e\u003cbr\u003e\u003cb\u003ePackage Included:\u003c\/b\u003e\u003cbr\u003e- 1 x Headphone Amplifier\u003c\/p\u003e","brand":"Thanksbuyer Online,SDR Radio, Testers and Measurement devices, Astronomy products, Audio Amplifer and Decoders","offers":[{"title":"Default Title","offer_id":41028715118641,"sku":"99110","price":1370.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/4790\/6353\/files\/1759976876-1.jpg?v=1780322855","url":"https:\/\/www.thanksbuyer.com\/ru\/products\/black-hpa-a1000-mk3-balanced-headphone-amplifier-relay-volume-control-oled-hd-screen-preamplifier","provider":"Thanksbuyer Online,SDR Radio, Testers and Measurement devices, Astronomy products,  Audio Amplifer and Decoders","version":"1.0","type":"link"}