1. Introducció
The Nobsound A5 is a high-fidelity Class D stereo amplifier designed to deliver powerful and clear audio for your home stereo or desktop setup. Featuring the TPA3255 chip, an adjustable high-pass filter, and customizable op-amps, it offers exceptional sound quality and flexibility. This manual provides detailed instructions for setting up, operating, and maintaining your A5 ampmés viu.
2. Característiques clau
- HiFi Sound with Adjustable High-Pass Filter (HPF): Refines mid-high frequencies and minimizes low-frequency interference (30-200Hz).
- Easy Customization with Plug-and-Play Op-Amps: Tempered glass access panel allows quick op-amp replacements (e.g., 2134/2604/5532/2068/muse02) for tailored sound profiles.
- PFFB Technology and High-Performance PCB: Post-Filter Feedback technology circuit and a 4-layer immersion gold PCB reduce distortion, improve frequency response, and ensure efficient heat management.
- Disseny impressionant: Compact with a transparent panel and adjustable internal LED lighting for a modern aesthetic.
- Sortida potent: 300W×2 stereo power (4Ω) with ultra-low THD (0.002%) using the TPA3255 chip.
3. Contingut del paquet
Marqueu la casella per als elements següents:
- 1x A5 Ampmés viu
- 1 x manual d'usuari
- 1x DC 32V/5A Power Adapter (Optional, depending on purchase)
- 1x DC 48V/5A Power Adapter (Optional, depending on purchase)
4. Instruccions de configuració
Follow these steps to connect your Nobsound A5 amplifier to your audio system.
4.1 Connexió de fonts d'àudio
- Assegureu-vos el ampel lifier està apagat i desconnectat de la font d'alimentació.
- Connect your audio source (e.g., Tablet PC, iPhone/Android Devices, CD/DVD/Media Players, TV/TV Set Top Box, Laptop/Mac/Computer, MP3 player) to the Entrada RCA jacks on the rear panel of the A5 amplifier using appropriate RCA cables.
4.2 Connectar altaveus
- For passive speakers, connect them to the Sortida de l'altaveu terminals on the rear panel using banana plugs or bare wire. Ensure correct polarity (+ to + and - to -).
- For active speakers or an active subwoofer, connect them to the PRE SORT (3.5mm AUX) jack on the rear panel.
4.3 Connexió d'alimentació
- Connect the DC power adapter (24-48V) to the DC IN port al panell posterior.
- Connecteu l'adaptador de corrent a una presa de corrent adequada.
5. Instruccions de funcionament
5.1 Engegada/Apagada i control de volum
The right knob on the front panel controls both power and volume. Rotate it clockwise to turn on the amplifier and increase volume, and counter-clockwise to decrease volume and turn off the ampmés viu.
5.2 High-Pass Filter (HPF) Adjustment
The left knob on the front panel adjusts the high-pass filter. This allows you to set a cutoff frequency between 30Hz and 200Hz. Adjusting the HPF helps to refine mid-high frequencies and minimize low-frequency interference, especially when using bookshelf speakers or integrating with a subwoofer.
5.3 Op-Amp Rolling (Customization)
The Nobsound A5 features a tempered glass access panel, allowing for easy replacement of the two NE5532 op-amps. This "plug-and-play" design enables audiophiles to experiment with different dual op-amps (e.g., 2134, 2604, 2068, or Muse02) to customize the sound profile without needing to disassemble the unit or use soldering tools.
5.4 LED Ambiance Control
El amplifier is equipped with internal LED lighting visible through the transparent top panel. This lighting offers multiple color options (R, G, B, R+G, R+B, G+B, RGB) to enhance the aesthetic of your audio setup. Specific controls for changing LED colors are typically located internally via switches or jumpers, or may be automatic. Refer to the visual guide for available color combinations.
6. Manteniment
6.1 Dissipació de calor
The Nobsound A5 features advanced full-body heat dissipation to ensure long-term and stable high-power output. It is normal for the casing to heat up during operation, especially during extended use or at high volumes. Ensure adequate ventilation around the amplificador per evitar el sobreescalfament.
6.2 Atenció general
- Mantenir el ampNetegeu-lo amb un drap suau i sec.
- Eviteu exposar la unitat a la llum solar directa, a temperatures elevades, a la humitat o a la pols.
- Do not block the ventilation holes on the casing.
7. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| Sense sortida de so |
|
|
| So distorsionat |
|
|
| Amplifier feels hot |
|
|
| No hi ha connectivitat Bluetooth | The Nobsound A5 amplifier does not feature built-in Bluetooth functionality. | This model is designed for wired connections (RCA input). If Bluetooth is desired, an external Bluetooth receiver can be connected to the RCA input. |
8. Especificacions
| Paràmetre | Valor |
|---|---|
| Marca | Douk Audio |
| Model | A5 |
| Entrada d'àudio | RCA estèreo |
| Sortida d'àudio | Banana speaker jacks / 3.5mm AUX (PRE OUT) |
| High-Pass Filter Adjustment Range | 30Hz-200Hz |
| Màx. Potència de sortida | 300 W*2 (4Ω) |
| Matched Speaker Impedance | 4-8Ω |
| THD+N | 0.002% |
| SNR | ≥114 dB |
| Sensibilitat d'entrada | 2V |
| Nivell de sortida nominal AUX | 3.7 V |
| Resposta de freqüència | 20 Hz-20 kHz (± 0.7 dB) |
| Voltage | DC 24-48V |
| Dimensions (W*D*H) | 95 * 92 * 50 mm / 3.74 * 3.62 * 1.97 polzades |
| Pes net | 506 g / 1.12 lliures |
| Package Weight (with 32V5A power supply) | 1100 g / 2.43 lliures |
| Package Weight (with 48V5A power supply) | 1200 g / 2.65 lliures |
8.1 Power Output Table
| Font d'alimentació | Impedància de l'altaveu | Potència de sortida nominal |
|---|---|---|
| 32V/5A | 4Ω | 78W+78W |
| 6Ω | 71W+71W | |
| 8Ω | 65W+65W | |
| 36V/6A | 4Ω | 107W+107W |
| 6Ω | 100W+100W | |
| 8Ω | 94W+94W | |
| 48V/5A | 4Ω | 120W+120W |
| 6Ω | 110W+110W | |
| 8Ω | 102W+102W | |
| 48V/10A | 4Ω | 250W+250W |
| 6Ω | 210W+210W | |
| 8Ω | 185W+185W |
9. Consells d'usuari
- Op-Amp Experimentació: The A5 comes with NE5532 op-amps. For a different sound signature, consider "rolling" (replacing) them with compatible dual op-amps like 2134, 2604, 2068, or Muse02. This is an easy way to fine-tune the audio to your preference.
- Connectivitat Bluetooth: The A5 does not have built-in Bluetooth. If wireless streaming is desired, connect an external Bluetooth audio receiver to the RCA input jacks.
10. Garantia i Suport
The Nobsound A5 amplifier typically comes with a 2-year warranty. For technical support, warranty claims, or further assistance, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase.
