1. Pengenalan
The JOYO TORNADO R-21 is a dual-channel overdrive effect pedal designed for electric guitars. It features independent footswitches for overdrive and boost, along with five high-precision tone control knobs, allowing for a wide range of tones from clean to wild overtones. This pedal is a JDC Signature model, certified by Grammy Award winner José de Castro.
2. Ciri-ciri Produk
- Saluran Dwi: Features independent Overdrive and Boost channels for versatile tone shaping.
- Kawalan Nada: Equipped with 5 independent high-precision control knobs for Bass, Treble, Drive, Boost, and Volume.
- Signature Design: Signed and certified by Grammy Award winner José de Castro (JDC Signature).
- Pembinaan Tahan Lama: Housed in a mini, solid metal alloy case.
- LED Ambient Lighting: Innovative JOYO R Series ambience LED lights enhance visual appeal.
- Pengurangan Bunyi: Designed with noise reduction technology for a clean signal.

Figure 1: JOYO TORNADO R-21 JDC Signature Overdrive Pedal.
3. Persediaan
Before connecting the pedal, ensure your amplifier and other effects are turned off to prevent unexpected noise or damage.
3.1 Sambungan
- Connect your electric guitar to the INPUT jack on the pedal.
- Sambungkan OUTPUT jack of the pedal to your amplifier or the input of the next effect pedal in your chain.
3.2 Bekalan Kuasa
The TORNADO R-21 pedal requires a 9V DC power supply (center negative). The power supply is NOT included in the package. Please use a JOYO original recommended power supply or other reliable brands to avoid noise or damage.
Figure 2: Power supply connection (DC 9V, center negative, 100mA current consumption).
4. Arahan Operasi
The TORNADO R-21 features dual channels and multiple control knobs for precise tone shaping.
4.1 Kawalan
Figure 3: Control knobs for tone adjustment.
- Tombol VOL: Melaraskan kelantangan output keseluruhan pedal.
- Tombol BASS: Adjusts the low-frequency content of your tone.
- Tombol TREBLE: Adjusts the high-frequency content of your tone.
- Tombol PEMANDUAN: Controls the amount of overdrive in the Drive channel. José de Castro's unique tone is clean, smooth, rich, and covers wide frequency bands.
- Tombol BOOST: Controls the amount of boost in the Boost channel. The overtone is spacious, beautifying the treble and bass nicely.
4.2 Suis Kaki
- Suis Kaki PINTUNG: Toggles the main overdrive effect on/off.
- BOOST Suis Kaki: Engages/disengages the independent boost function.
Rajah 4: Utama view of the pedal showing footswitches and knobs.
4.3 Lampu Ambien LED
The JOYO R Series pedals feature innovative LED ambient lights that create a unique performance scene. These lights indicate the pedal's status.
Figure 5: Pedal showcasing the exclusive LED ambient light feature.
5. Tone Demonstration Videos
JOYO TORNADO R-21 Tone Demo by Marty5150
This video provides a detailed tone demonstration of the JOYO TORNADO R-21 pedal by Marty5150, showcasing its sound capabilities.
JOYO Tornado R-21 Demo
A direct demonstration video of the JOYO Tornado R-21 pedal, highlighting its features and sound.
JOYO Pedal TORNADO R-21 Via: Loida Liuzzi
Loida Liuzzi demonstrates the JOYO TORNADO R-21 pedal, providing insights into its performance.
JOYO TORNADO Tone Demo Via: The Axe Guitar
A tone demonstration of the JOYO TORNADO pedal by The Axe Guitar, exploring its sound characteristics.
6. Penyelenggaraan
- Pastikan pedal bersih dan bebas daripada habuk. Gunakan kain lembut dan kering untuk membersihkan.
- Elakkan mendedahkan pedal kepada suhu, kelembapan atau cahaya matahari langsung yang melampau.
- Jangan cuba membuka atau mengubah suai pedal, kerana ini boleh membatalkan jaminan dan menyebabkan kerosakan.
7. Penyelesaian masalah
- Tiada Bunyi: Check all cable connections (input, output, power). Ensure the pedal is receiving power and the footswitch is engaged. Verify your guitar and ampliifier berfungsi dengan betul.
- Bunyi yang tidak diingini: Ensure you are using a compatible 9V DC center-negative power supply. Incompatible power supplies can cause noise. Check for faulty cables or interference from other electronic devices.
- Pedal Tidak Bertindak balas: Disconnect and reconnect the power supply. If the issue persists, try a different power supply or contact customer support.
8. Spesifikasi
| Spesifikasi | Perincian |
|---|---|
| Berat Barang | 12 auns (341 Gram) |
| Dimensi Produk | 4.92"L x 3.07"W x 1.89"H |
| Nombor Model Item | Pengilang-JOYO-R21-0010 |
| Peranti Serasi | Electric Guitar, Guitar Combo, Guitar Amplifier, Pedal Controller |
| Jenis Penyambung | Lurus 1/4-Inci |
| Antara Muka Perkakasan | Audio 1/4 inci |
| Format Isyarat | Analog |
| Jenis Bahan | Aloi |
| Gaya Muzik | Pop, Rock, Blues, Jazz |
| Sumber Kuasa | Elektrik Bertali |
| Voltage | 9 Volt (DC) |
9. Apa yang ada di dalam Kotak
- JOYO Overdrive Effect Pedal (TORNADO R-21)
- Manual Pengguna
10. Waranti & Sokongan
JOYO Technology is committed to providing reliable quality and customer satisfaction.
- Perkhidmatan Pelanggan: Prompt service within 24 hours for any product use issues.
- Pulangan: Polisi pemulangan tanpa sebab 30 hari.
- Penggantian: Penggantian tersedia dalam tempoh 12 bulan selepas pembelian.





