1. Introduzione
The AIYIMA A20 is a 2.1 channel power amplifier designed for high-fidelity audio systems. It features a TPA3255 Class D amplifier chip, fully balanced circuitry with PFFB technology, and offers 300W x 2 output. Key functionalities include an adjustable High-Pass Filter (HPF), a dedicated subwoofer output, XLR and RCA input options, a 12V trigger for system integration, and a bypass function for use with external preamplifiers. This manual provides detailed instructions for the setup, operation, and maintenance of your A20 amppiù vivace.
2. Prodotto finitoview
2.1 Pannello frontale
Immagine: Frontale view dell'AIYIMA A20 amplifier, showing the power indicator, volume knob, and input selection switch.
- Power Indicator Light (On/Off/HPF): Indicates power status and HPF mode.
- Manopola di controllo del volume: Adjusts the output volume.
- Input Mode Switch (RCA/XLR): Selects between RCA and XLR audio inputs.
2.2 Pannello posteriore
Image: Rear panel diagram of the AIYIMA A20, detailing all input and output connections and controls.
- XLR Input (L/R): Balanced audio inputs for connecting sources with XLR outputs.
- RCA Input (L/R): Unbalanced audio inputs for connecting sources with RCA outputs.
- RCA Gain Switch (+3dB): Provides a +3dB gain boost for RCA inputs, useful for matching lower-output sources.
- HPF Knob: Adjusts the High-Pass Filter frequency (60-200Hz) when HPF mode is active.
- SUB FUORI: Output for connecting an active subwoofer.
- Pulsante BYPASS: Engages or disengages bypass mode. Hold for 3 seconds to switch.
- Ingresso/uscita trigger 12V: For synchronized power control with compatible devices.
- Uscita altoparlante (L/R): Binding posts for connecting passive speakers.
- Ingresso alimentazione (CC 24-48 V): Connects to the provided power adapter.
2.3 Dimensioni
Image: Diagram illustrating the physical dimensions of the AIYIMA A20 amppiù vivace.
L'AIYIMA A20 amplifier measures approximately 190mm (7.48 inches) in length, 142mm (5.59 inches) in width, and 46mm (1.81 inches) in height. Its net weight is approximately 1115g (2.2 pounds).
3. Caratteristiche principali
- Audio ad alte prestazioni: Achieves a 116dB Signal-to-Noise Ratio (SNR) and 0.002% THD+N for clear sound reproduction.
- 2.1 Integrazione del sistema: Features an adjustable High-Pass Filter (HPF: 60-200Hz) and a dedicated Subwoofer Output for optimized 2.1 channel audio setups.
- Connettività flessibile: Includes XLR and RCA inputs with a toggle switch for source selection.
- Modalità bypass: Allows the amplifier to function as a pure power amplifier, bypassing its internal volume control, ideal for use with external preamplificatori.
- RCA Gain Switch: A +3dB gain switch for RCA inputs to match various source levels.
- Trigger 12V: Enables synchronized power on/off with other compatible audio components.
- Componenti di qualità: Built with a 4-layer gold-sunk PCB, German WIMA capacitors, and Japanese Rubycon capacitors for reliability and sound integrity.
- Swappable Op-Amps: Features LME49720 op-amps in a swappable design, allowing for customization.
- Raffreddamento efficiente: Internal air convection design ensures stable high-power operation.
4. Guida all'installazione
4.1 Connessioni
Image: Diagram illustrating various connection possibilities for the AIYIMA A20 amplifier with different audio sources and outputs.
- Collegamento dell'altoparlante: Connect your passive speakers to the Speaker Output binding posts on the rear panel. Ensure correct polarity (Red/Positive to Red/Positive, Black/Negative to Black/Negative).
- Collegamento alla sorgente audio:
- Ingresso XLR: For balanced audio sources (e.g., high-end CD players, preamplifiers, DACs) using XLR cables.
- Ingresso RCA: For unbalanced audio sources (e.g., CD players, streamers, DACs, computers via 3.5mm to RCA adapter) using RCA cables.
- Collegamento del subwoofer: If using an active subwoofer, connect its input to the SUB OUT port on the A20.
- Connessione trigger 12V: If you have a compatible device (e.g., AIYIMA T20 preamp) with a 12V trigger output, connect it to the 12V Trigger Input on the A20 for synchronized power control.
- Collegamento di potenza: Connect the provided DC48V 5A power adapter to the Power Input (DC 24-48V) on the rear panel, then plug the adapter into a wall outlet.
5. Istruzioni per l'uso
- Accensione/spegnimento: Once all connections are secure, turn on the amplifier using the power switch. The power indicator light will illuminate.
- Selezione dell'input: Use the Input Mode Switch on the front panel to select between RCA and XLR inputs based on your connected source.
- Regolazione del volume: Rotate the Volume Control Knob on the front panel to adjust the audio output level. Start with a low volume and gradually increase it.
- High-Pass Filter (HPF) Adjustment:
Image: Detail showing the HPF knob on the rear panel with frequency markings (60Hz, 80Hz, 120Hz, 200Hz).
If you are using a subwoofer and wish to protect your main speakers from low bass frequencies, activate the HPF mode. Then, use the HPF Knob on the rear panel to set the desired crossover frequency between 60Hz and 200Hz. This directs frequencies below the set point to the SUB OUT and filters them from the main speaker outputs.
- Modalità bypass:
Image: Close-up of the Bypass button on the rear panel.
To use the A20 as a pure power amplifier with an external preamplifier, press and hold the BYPASS button on the rear panel for 3 seconds. In bypass mode, the amplifier's internal volume control is maximized. Before engaging this mode, ensure the volume at your audio source or external preamplifier is reduced to prevent speaker damage. To exit bypass mode, press and hold the BYPASS button for 3 seconds again.
- RCA Gain Switch: If your RCA audio source has a low output level, you can engage the +3dB gain switch located near the RCA inputs on the rear panel to boost the signal.
6. Manutenzione
- Pulizia: Utilizzare un panno morbido e asciutto per pulire l'esterno del amplificatore. Evitare l'uso di detergenti liquidi o solventi.
- Ventilazione: Garantire il amplifier has adequate ventilation. Do not block the ventilation holes on the sides.
- Ambiente: Mantieni il amplifier away from direct sunlight, heat sources, excessive moisture, and dust.
- Spegnimento: Always power off the amplifier and disconnect it from the power outlet before performing any maintenance or making connections.
- Operazione-Amp Scambio: If you choose to swap op-amps, assicurarsi che amplifier is powered off and disconnected. Refer to specialized guides for proper op-amp handling and replacement procedures.
Immagine: Primo piano view of the internal circuit board, highlighting the swappable op-amps.
7. Risoluzione Dei Problemi
- Nessuna uscita audio:
- Controllare se il amplifier is powered on and the indicator light is active.
- Verify that the correct input (RCA or XLR) is selected.
- Ensure all audio cables are securely connected to both the source and the amppiù vivace.
- Controllare i collegamenti degli altoparlanti per verificare la corretta polarità e il contatto sicuro.
- Adjust the volume knob. If in Bypass mode, ensure the external preamplifier's volume is not muted or too low.
- Suono distorto:
- Reduce the volume level from both the source and the amppiù vivace.
- Controllare che i cavi audio non siano danneggiati.
- Assicurarsi che l'impedenza dell'altoparlante corrisponda a ample capacità di lifier.
- If using RCA input, try toggling the +3dB gain switch off if the source output is already high.
- Ronzio o ronzio:
- Assicurarsi che tutti i collegamenti siano sicuri.
- Prova a collegare il amplifier and source to the same power outlet to avoid ground loops.
- Spostare il amplifier lontano da altri dispositivi elettronici che potrebbero causare interferenze.
- 12V Trigger Not Functioning:
- Verify that the connected device's 12V trigger output is active.
- Ensure the 12V trigger cable is correctly connected.
8. Specifiche
| Caratteristica | Specificazione |
|---|---|
| Dimensioni del prodotto (L x P x A) | 7.48 x 5.59 x 1.81 pollici (190 x 142 x 46 mm) |
| Peso | 2.2 libbre (1115 g) |
| Numero modello articolo | A20 |
| Numero di canali | 2.1 |
| Voltage Ingresso | CC 24-48 Volt |
| Rapporto segnale / rumore (SNR) | 116 dB |
| Distorsione Armonica Totale + Rumore (THD + N) | 0.002% |
| High-Pass Filter (HPF) Range | Frequenza |
| Ingressi | XLR (bilanciato), RCA (sbilanciato) |
| Risultati | Speaker Output (L/R), SUB OUT (for active subwoofer) |
| Funzioni speciali | 12V Trigger, Bypass Mode, RCA +3dB Gain Switch, Swappable Op-Amps |
8.1 Power Output (Approximate)
Image: Table detailing the rated and peak output power of the A20 amplifier under different power supply units (PSU) and speaker impedances.
| Alimentatore | Impedenza dell'altoparlante | Rated Output Power (1kHz, THD 1%) | Peak Output Power (1kHz, THD 10%) |
|---|---|---|---|
| 36V/6A | 4Ω | 107W * 2 | 130W * 2 |
| 6Ω | 100W * 2 | 120W * 2 | |
| 8Ω | 94W * 2 | 110W * 2 | |
| 48V/5A | 4Ω | 120W * 2 | 144W * 2 |
| 6Ω | 110W * 2 | 130W * 2 | |
| 8Ω | 100W * 2 | 115W * 2 | |
| 48V/10A | 4Ω | 250W * 2 | 288W * 2 |
| 6Ω | 210W * 2 | 230W * 2 | |
| 8Ω | 150W * 2 | 185W * 2 |
9. Cosa c'è nella scatola
Image: Visual representation of the items included in the AIYIMA A20 product package.
- 1 x AIYIMA A20 Balanced Stereo Power Amppiù vivace
- 1 x DC48V 5A Power Adapter
- 1 x Manuale utente
- 1 x Scheda di garanzia
- 1 x 12V Trigger Cable
10. Garanzia e supporto
L'AIYIMA A20 amplifier typically comes with a 2-year warranty from the date of purchase. Please refer to the included warranty card for specific terms and conditions. For technical support, troubleshooting assistance, or warranty claims, please contact AIYIMA customer service through the retailer where the product was purchased or visit the official AIYIMA websito per le informazioni di contatto.
