1. Introducció
Thank you for choosing the Nobsound T7 7-Band Equalizer Balanced XLR / RCA Preamp. This device is designed to enhance your audio experience by providing precise control over your sound's frequency response. It features independent 7-band EQ adjustment, balanced XLR and RCA inputs/outputs, and a bypass mode for original sound playback. Please read this manual thoroughly before operating the device to ensure proper setup and optimal performance.
Figure 1: Nobsound T7 Stereo Equalizer with key features.
2. Informació de seguretat
- No exposeu aquest dispositiu a la pluja o la humitat.
- No desmunteu la unitat. Encarregueu tot el manteniment a personal qualificat.
- Assegureu-vos una ventilació adequada al voltant de la unitat.
- Use only the provided DC 12V power adapter.
- Mantingueu la unitat allunyada de les fonts de calor i de la llum solar directa.
3. Contingut del paquet
Si us plau, comproveu el paquet per veure si hi ha els elements següents:
- 1 x T7 Preamp
- 1 x adaptador d'alimentació DC 12V
Figure 2: Package contents and dimensions of the T7 Preamp.
4. Producte acabatview
4.1 Tauler frontal
Figure 3: Front panel controls of the Nobsound T7.
- Input Selector / Power Switch: Selects between RCA input, Balanced (BAL) input, or powers off the unit.
- 64Hz Adjustment Knob: Adjusts the gain for the 64Hz frequency band.
- 125Hz Adjustment Knob: Adjusts the gain for the 125Hz frequency band.
- 250Hz Adjustment Knob: Adjusts the gain for the 250Hz frequency band.
- 500Hz Adjustment Knob: Adjusts the gain for the 500Hz frequency band.
- 2KHz Adjustment Knob: Adjusts the gain for the 2KHz frequency band.
- 4KHz Adjustment Knob: Adjusts the gain for the 4KHz frequency band.
- 8KHz Adjustment Knob: Adjusts the gain for the 8KHz frequency band.
4.2 Panell posterior
Figure 4: Rear panel connections of the Nobsound T7.
- Balanced XLR Input (L/R): For connecting audio sources with XLR outputs.
- Entrada RCA (E/D): For connecting audio sources with RCA outputs.
- Balanced XLR Output (L/R): Per connectar amb amplifiers or active speakers with XLR inputs.
- Sortida RCA (E/D): Per connectar amb amplifiers or active speakers with RCA inputs.
- Entrada DC 12V: Power input for the provided DC 12V adapter.
5. Configuració
Follow these steps to connect your Nobsound T7 Equalizer:
- Connexió d'alimentació: Connect the provided DC 12V power adapter to the 'DC 12V IN' port on the rear panel of the T7, then plug the adapter into a power outlet.
- Connexió d'entrada d'àudio:
- For RCA Input: Connect your audio source (e.g., CD player, phone, computer) to the 'RCA Input' jacks on the rear panel using RCA cables.
- For Balanced XLR Input: Connect your audio source to the 'Balanced XLR Input' jacks on the rear panel using XLR cables.
- Connexió de sortida d'àudio:
- For RCA Output: Connect the 'RCA Output' jacks on the rear panel of the T7 to your ampamplificador o altaveus actius mitjançant cables RCA.
- For Balanced XLR Output: Connect the 'Balanced XLR Output' jacks on the rear panel of the T7 to your amplifier or active speakers using XLR cables.
- Selecció d'entrada: On the front panel, turn the input selector knob to 'RCA' or 'BAL' corresponding to your input connection.
Note: The T7 does not have a volume control knob. It will output at its rated level. Ensure your amplifier or active speakers have their own volume control.
Note: Both XLR and RCA outputs will function simultaneously.
6. Instruccions de funcionament
6.1 Encès/Apagat
To power on the unit, turn the input selector knob from 'OFF' to either 'RCA' or 'BAL'. To power off, turn the knob to 'OFF'.
6.2 Ajust de l'equalitzador
The T7 features seven independent frequency band controls, ranging from 64Hz to 8KHz. Each knob allows for a gain adjustment from -6dB to +6dB. Rotate the knobs clockwise to boost a frequency band and counter-clockwise to cut it. Experiment with these controls to tailor the sound to your preference or to compensate for room acoustics and speaker characteristics.
Figure 5: Adjusting the 7-band EQ equalizer.
6.3 Mode bypass
When the unit is powered off (input selector knob set to 'OFF'), the T7 automatically enters bypass mode. In this mode, the audio signal passes directly through the unit without any equalization or preamplification, allowing you to enjoy the original, unaltered sound from your source.
Figure 6: Bypass mode for original sound.
7. Especificacions
| Paràmetre | Valor |
|---|---|
| Model | Douk Audio T7 |
| Entrada d'àudio | Single-ended RCA / Balanced XLR |
| Sortida d'àudio | Single-ended RCA / Balanced XLR |
| Resposta de freqüència | 20Hz～20KHz (±1dB) |
| Bandes de freqüència | 64Hz / 125Hz / 250Hz / 500Hz / 2KHz / 4KHz / 8KHz |
| Sensibilitat d'entrada RCA | 0.775Vrms |
| Nivell de sortida RCA | 1.2Vrms |
| BAL Input Sensitivity | 1.5Vrms |
| BAL Output Level | 3Vrms |
| THD (distorsió harmònica total) | 0.003% |
| SNR (ràtio senyal/soroll) | ≥104 dB |
| Voltage | DC12V (≥1.5A) |
| Dimensions (W*D*H) | 152*126*42mm / 5.98*4.96*1.65in |
| Pes net | 700 g / 1.54 lliures |
| Pes del paquet | 1.0 kg / 2.20 lliures |
8. Solució De Problemes
8.1 Sense sortida de so
- Ensure the T7 is powered on and the input selector is set to the correct input (RCA or BAL).
- Verify all audio cables are securely connected to both the T7 and your audio source/amplifier/altaveus actius.
- Check the volume level on your amplifier or active speakers, as the T7 does not have its own volume control.
- Test with different audio cables and sources to rule out faulty components.
8.2 So distorsionat
- Assegureu-vos que totes les connexions siguin segures i lliures d'interferències.
- Check if the input signal level from your source is too high, causing clipping.
- Adjust the EQ knobs to ensure no single frequency band is excessively boosted, which could lead to distortion.
- Test with different audio sources and cables.
8.3 Equalizer Not Working
- Ensure the unit is powered on and not in bypass mode (input selector not on 'OFF').
- Verify that the EQ knobs are adjusted away from their center (0dB) position.
9. Consells d'usuari
- Control de volum: Remember that the T7 does not have a volume control. Always manage your system's overall volume using your amplifier o altaveus actius.
- Sortides simultànies: Both XLR and RCA outputs are active at the same time. This can be useful for connecting to multiple systems or for monitoring.
- Subtle Adjustments: When adjusting the equalizer, start with small changes. Even minor tweaks can significantly impact the sound.
- Acústica de l'habitació: Use the equalizer to compensate for deficiencies in your listening room's acoustics, such as excessive bass or harsh treble.
- Speaker Correction: The EQ can help fine-tune the frequency response of your speakers to better match your preferences.
10. Manteniment
- Neteja: Feu servir un drap suau i sec per netejar l'exterior de la unitat. No utilitzeu netejadors líquids ni dissolvents.
- Emmagatzematge: Quan no l'utilitzeu durant períodes prolongats, guardeu la unitat en un lloc fresc i sec, allunyat de la llum solar directa i de temperatures extremes.
- Ventilació: Ensure the unit has adequate ventilation and that its vents are not blocked.
11. Garantia i Suport
Nobsound products are designed for reliability and performance. For warranty information or technical support, please refer to the documentation provided at the time of purchase or contact your retailer. Keep your purchase receipt as proof of purchase.
