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T13 is a preamp with stereo RCA and phono(mm) inputs that is compatible with most audio devices such as turntables, phones, computers, CD players, etc. to meet different requirements. The stereo RCA output greatly improves the sound quality for amplifiers or active speakers and adds a 3.5mm headphone jack to easily control all 16-300Ω headphones. Custom full color VU meter, color and brightness of backlight can be adjusted continuously and freely; with built-in professional VU meter driver chip makes the pointer dance more precisely, dynamically decorates the audio system and brings different enjoyment even in the tightest space. BETTER DISPLAY & CLEAN SOUND AGC algorithm achieves ideal visual effects and avoids displaying when entering a low signal and display in full screen mode when input is high. Adds built-in high-impedance 100K input and power isolation circuits, no common ground noise even when the power supply is shared with audio players to ensure the purity of the sound source. Exquisite appearance and easy operation: CNC machined aluminum plate and gold-plated RCA connectors with longer service life and durable adjustment knobs; Powered by USB 5V, can be powered by power bank, phone charger, computer, etc., very suitable for using desktop audio systems at home/office to achieve better listening enjoyment.; Product description Warm tips: 1. Without DC 5V power supply, please prepare it yourself. 2. Headphone output with priority, please make sure the headphone has been disconnected if want RCA output. 3. VU meter shows the level of the input source, and adjusting the volume of T13 will not change the VU swing range. Parameters Audio Input: Stereo RCA / Phono MM Audio Output: Stereo RCA / 3.5mm Headphone Jack Input level: RCA: 0.775V RMS Phono: 0.005 V RMS. Frequency response: RCA: 20Hz-20KHz (±0.5dB). Phono: Ref to RIAA ± 2 dB. Output level: RCA: 1.5 V RMS Phono: 0.6 V RMS. S/N ratio: RCA: ≥106 dB. Phono: ≥80 dB. Headphone output: 250mW @ 32Ω. 100 mW @ 64Ω. 60mW @ 128Ω. Headphone impedance range: 16-300Ω Climate factor: ≤0.1%. VU meter. Colour: multi-coloured to choose from. Backlight adjustable: support Save setting: support Operating voltage: DC 5 V (≥ 0.6 A). Dimensions (W x D x ): 178 x 118 x 55 mm / 7 x 4.65 x 2.17 inches. Package dimensions (W x D x H): 235 x 180 x 90 mm / 9.25 x 7.09 x 3.54 inches. Net weight: 730g/1.61lb. Package weight: 1000 g/2.20 lb. Packing list 1 x T13 preamplifier. 1 x USB cable (type-C). 1 x user manual.; Product description Warm tips: 1. Without DC 5V power supply, please prepare it yourself. 2. Headphone output with priority, please make sure the headphone has been disconnected if want RCA output. 3. VU meter shows the level of the input source, and adjusting the volume of T13 will not change the VU swing range. Parameters Audio Input: Stereo RCA / Phono MM Audio Output: Stereo RCA / 3.5mm Headphone Jack Input level: RCA: 0.775V RMS Phono: 0.005 V RMS. Frequency response: RCA: 20Hz-20KHz (±0.5dB). Phono: Ref to RIAA ± 2 dB. Output level: RCA: 1.5 V RMS Phono: 0.6 V RMS. S/N ratio: RCA: ≥106 dB. Phono: ≥80 dB. Headphone output: 250mW @ 32Ω. 100 mW @ 64Ω. 60mW @ 128Ω. Headphone impedance range: 16-300Ω Climate factor: ≤0.1%. VU meter. Colour: multi-coloured to choose from. Backlight adjustable: support Save setting: support Operating voltage: DC 5 V (≥ 0.6 A). Dimensions (W x D x ): 178 x 118 x 55 mm / 7 x 4.65 x 2.17 inches. Package dimensions (W x D x H): 235 x 180 x 90 mm / 9.25 x 7.09 x 3.54 inches. Net weight: 730g/1.61lb. Package weight: 1000 g/2.20 lb. Packing list 1 x T13 preamplifier. 1 x USB cable (type-C). 1 x user manual.; Warm tips: 1. Without DC 5V power supply, please prepare it yourself. 2. Headphone output with priority, please make sure the headphone has been disconnected if want RCA output. 3. VU meter shows the level of the input source, and adjusting the volume of T13 will not change the VU swing range. Parameters Audio Input: Stereo RCA / Phono MM Audio Output: Stereo RCA / 3.5mm Headphone Jack Input level: RCA: 0.775V RMS Phono: 0.005 V RMS. Frequency response: RCA: 20Hz-20KHz (±0.5dB). Phono: Ref to RIAA ± 2 dB. Output level: RCA: 1.5 V RMS Phono: 0.6 V RMS. S/N ratio: RCA: ≥106 dB. Phono: ≥80 dB. Headphone output: 250mW @ 32Ω. 100 mW @ 64Ω. 60mW @ 128Ω. Headphone impedance range: 16-300Ω Climate factor: ≤0.1%. VU meter. Colour: multi-coloured to choose from. Backlight adjustable: support Save setting: support Operating voltage: DC 5 V (≥ 0.6 A). Dimensions (W x D x ): 178 x 118 x 55 mm / 7 x 4.65 x 2.17 inches. Package dimensions (W x D x H): 235 x 180 x 90 mm / 9.25 x 7.09 x 3.54 inches. Net weight: 730g/1.61lb. Package weight: 1000 g/2.20 lb. Packing list 1 x T13 preamplifier. 1 x USB cable (type-C). 1 x user manual.