1. Uvod
The Double OS1 Resonance Pickup On-Board Preamp is an innovative guitar preamplifier system designed to enhance acoustic guitar sound. It features a unique Same Frequency Trans (SFT) transmission device that drives the guitar body to resonate, producing a more resonant, solid, and dynamic sound even without an external amplifier. This system integrates a dual-pickup setup, combining a piezo pickup and a microphone, to capture every detail of your playing. It also includes built-in reverb, chorus, and delay effects, along with Bluetooth connectivity for accompaniment.
2. Sadržaj paketa
Molimo Vas da provjerite da li su sve komponente prisutne u paketu:
- 1 x Pickup Unit
- 1 x Završni priključak
- 1 x Vibrirajuća truba
- 1 x Žica za prikupljanje
- 1 x Type-C kabel
- 2 x klipovi

Figure 2.1: Included components of the Double OS1 Resonance Pickup system. Note that the pickup wire and vibrating horn may vary in appearance (random delivery).
3. Installation (Requires Opening Holes)
This is an on-board preamplifier system that requires permanent installation into your guitar. This process involves opening holes in the guitar body to accommodate the pickup unit and end-pin jack. Professional installation by a qualified luthier or guitar technician is highly recommended to prevent damage to your instrument.
The main unit is designed to be mounted on the side of the guitar, providing easy access to controls. The end-pin jack replaces the existing end-pin, serving as both a strap button and an output for connecting to an amplifier ili PA sistem.

Figure 3.1: The preamp unit installed on a guitar, demonstrating its on-board nature and the necessity for guitar modification.

Figure 3.2: The preamp unit seamlessly integrated into the guitar body.
4. Uputstvo za upotrebu
4.1. Uključivanje/isključivanje i punjenje
Preamp is equipped with a 2000mAh rechargeable Li-ion battery. To charge the unit, connect the provided Type-C cable to the Type-C interface on the preamp and a suitable USB power source. The charging rate is increased by 50% for faster charging.

Figure 4.1: Charging the preamp via the Type-C port.
4.2. Kontrole i funkcije
The main control dial and surrounding buttons allow for easy adjustment of various parameters:

Slika 4.2: Gotovoview od preamp kontrole.
- Kontrolor: Main rotary dial for adjusting volume and navigating settings.
- LED brojčanik Lamp / Indicator: Provides visual feedback on settings and battery status.
- Sučelje tipa C: Koristi se za punjenje interne baterije.
- BT (Bluetooth): Activates Bluetooth 5.0 connectivity for pairing with external devices (e.g., smartphone) to play background music or accompaniment.
- AUX: Likely an auxiliary input or function related to external audio.
- Reverb: Controls the reverb effect, adding spatial depth to the guitar sound.
- Refren: Controls the chorus effect, creating a thicker, modulated sound.
- kašnjenje: Controls the delay effect, producing echoes of the guitar sound.
- Mikrofon: Adjusts the level or activates the internal microphone pickup.
4.3. SFT (Same Frequency Trans) Technology
The SFT system utilizes a transmission device to vibrate the guitar body, enhancing its natural resonance. This feature allows the guitar to produce a louder, more vibrant sound without requiring an external amplifier. The system picks up the guitar's sound and uses the transmission device to drive the guitar body, increasing its frequency response and making the sound more resonant, solid, and dynamic.
4.4. Dual-Pickup System
Preamp incorporates a dual-pickup system consisting of a piezo pickup and a microphone. This combination ensures that every nuance of your playing is captured, adding richness and dynamics to the guitar's amplified sound. The microphone component requires connection to a speaker system to be effective.
4.5. Digitalna obrada signala (DSP)
The system features advanced scientific circuit design with DSP (Digital Signal Processing) for enhanced acoustic dynamics and digital gain output. This ensures high-quality sound processing for the integrated effects and overall output.

Figure 4.3: Internal components and advanced circuit design.

Figure 4.4: Key features including Bluetooth, accompaniment, and DSP vibration effects.
5. Održavanje i njega
- Uređaj održavajte čistim brisanjem mekom, suhom krpom. Izbjegavajte upotrebu abrazivnih sredstava za čišćenje ili rastvarača.
- Zaštitite uređaj od ekstremnih temperatura, vlage i direktne sunčeve svjetlosti.
- Izbjegavajte ispuštanje uređaja ili izlaganje jakim udarcima.
- Ensure the Type-C charging port is free of dust and debris.
- If the unit will not be used for an extended period, charge the battery periodically to maintain its health.
6. Otkrivanje problema
- Nema izlaza zvuka:
- Ensure the unit is powered on and sufficiently charged.
- Check all cable connections, including the end-pin jack to your ampsistem za podizanje/razglas.
- Verify that the volume on the preamp i tvoj ampLifier je podignut.
- If using the microphone pickup, ensure it is connected to a speaker system for effectiveness.
- Problemi sa Bluetooth vezom:
- Osigurajte prethodnoamp's Bluetooth function is activated.
- Make sure your external device's Bluetooth is on and discoverable.
- Približite uređaje jedan drugom kako biste bili sigurni da su unutar dometa.
- Pokušajte odvojiti i ponovo upariti uređaje.
- Efekti ne rade:
- Check the effect level controls (Reverb, Chorus, Delay) on the preamp.
- Ensure the unit is properly installed and receiving signal from the guitar.
- Baterija se ne puni:
- Verify the Type-C cable is securely connected to both the preamp i izvor napajanja.
- Pokušajte s drugim Type-C kabelom ili adapterom za napajanje.
- Provjerite da li je izvor napajanja funkcionalan.
7. Specifikacije
| Feature | Specifikacija |
|---|---|
| Materijal | ABS |
| Baterija | 1 x 2000mAh rechargeable Li-ion battery |
| Item Size (Preamp Jedinica) | 90 * 50 * 45 mm / 3.54 * 1.97 * 1.77 in |
| Item Weight (Preamp Jedinica) | 207 g / 7.30 oz |
| Težina paketa | 357 g / 12.59 oz |
| Veličina paketa | 17.5 * 12 * 6 cm / 6.89 * 4.7 * 2.36 in |
| Povezivanje | Bluetooth 5.0, Type-C (charging) |
| Efekti | Reverb, Chorus, Delay |
| Sistem preuzimanja | Dvostruki pickup (Piezo i mikrofon) |
| Posebne karakteristike | SFT (Same Frequency Trans) technology, DSP |

Figure 7.1: Dimensions of the preamp jedinica.
8. Garancija i podrška
Specific warranty information for this product is not provided in the available documentation. For any warranty claims, technical support, or service inquiries, please contact the seller or manufacturer directly through your purchase platform. Retain your proof of purchase for any support requests.