Bubuka
The Marshall SV20H Studio Vintage 20/5-watt Tube Head is a compact yet powerful amplifier designed to deliver the iconic "Plexi" tone. This amplifier head is a versatile tool for guitarists seeking classic British rock sounds, offering both 20-watt and 5-watt power modes for various playing environments, from studio recording to live performances. It features a 1-channel design with four inputs, high/low sensitivity loudness controls, an effects loop, and a power reduction circuit, providing flexibility and authentic vintage sora.
Émbaran Kasalametan
Mangga baca sareng pahami sadaya pitunjuk kaamanan sateuacan ngoperasikeun amplifier. Failure to follow these instructions may result in electric shock, fire, or other hazards.
- Sumber Daya: Nyambungkeun amplifier only to a power supply of the type described in this manual and marked on the unit. Ensure the power cord is not damaged and is properly grounded.
- Ventilasi: Do not block any ventilation openings. Install in accordance with the manufacturer's instructions. Adequate airflow is essential to prevent overheating.
- Cai sareng Uap: Do not expose this apparatus to rain or moisture. Do not use near water or in wet locations.
- Panas: Entong dipasang di deukeut sumber panas sapertos radiator, register panas, kompor, atanapi aparat sanésna (kalebet ampLiifiers) anu ngahasilkeun panas.
- Palayanan: Entong nyobian ngalayanan produk ieu nyalira. Rujuk sadayana jasa ka tanaga jasa anu mumpuni. Diperlukeun ngalayanan nalika aparatur ruksak ku cara naon waé, sapertos kabel catu daya atanapi colokan rusak, cairan tumpah atanapi barang murag kana aparatur, aparatur parantos kakeunaan hujan atanapi lembab, henteu beroperasi sacara normal, atanapi parantos turun.
- Tabung: tabung amplifiers contain vacuum tubes that operate at high temperatures and high voltages. Exercise extreme caution when handling or replacing tubes. Allow the amplifier to cool down completely before attempting any tube maintenance.
- Volume luhur: Paparan kana volume anu luhur dina jangka waktu anu lila tiasa nyababkeun karusakan dédéngéan permanén. Ati-ati nalika nyetel tingkat volume.
Ngamimitian
Upon receiving your Marshall SV20H, carefully unpack the amplifier from its packaging. Retain all packaging materials for future transport or storage. Inspect the amplifier for any signs of damage that may have occurred during shipping. If any damage is found, contact your retailer immediately.
Sateuacan nyambungkeun amplifier, ensure it is placed on a stable, level surface with adequate ventilation around all sides.
Disetél
Follow these steps to set up your SV20H amplifier head:
- Connect Speaker Cabinet: Using a high-quality speaker cable (not a guitar cable), connect the appropriate speaker output on the rear of the SV20H to your speaker cabinet. Ensure the impedance of the speaker cabinet matches the selected output on the amplifier (e.g., 8 Ohm output to an 8 Ohm cabinet). Pernah beroperasi dina amplifier without a speaker load connected.
- Sambungkeun Kakuatan: Pastikeun amplifier's power switch is in the 'OFF' position. Connect the supplied power cord to the IEC inlet on the rear of the amplifier and then to a grounded electrical outlet.
- Sambungkeun Instrumen: Plug your guitar into one of the input jacks on the front panel. The SV20H features four inputs: two for High Sensitivity (Loudness 1) and two for Low Sensitivity (Loudness 2). Experiment to find the input that best suits your guitar and desired tone.

Figure 1: Front panel of the Marshall SV20H amplifier head, displaying the various controls and input jacks.
Operasi anu Amppangagung
The SV20H offers intuitive controls for shaping your sound:
- Power Switch (MAINS): Ngahurungkeun amplifier on and off. Always turn the amplifier on with the MAINS switch first, then the STANDBY switch (if applicable, though this model typically has a single power switch).
- Loudness 1 (High Sensitivity): Controls the volume of the high-sensitivity input. This input provides more gain and is ideal for achieving classic rock crunch and lead tones.
- Loudness 2 (Low Sensitivity): Controls the volume of the low-sensitivity input. This input offers cleaner tones with less gain, suitable for jazz, blues, or when using high-output pickups.
- Ayana: Adjusts the amount of high-frequency feedback in the power amplifier section, adding sparkle and definition to your tone.
- Bass, Tengah, Treble: Standard three-band equalizer controls to shape the low, mid, and high frequencies of your guitar tone.
- Power Reduction Circuit: The SV20H features a power reduction switch (often labeled 20W/5W or similar) allowing you to switch between full 20-watt output and a lower 5-watt output. This is useful for achieving cranked tube tones at lower volumes.
- Loop épék: The series effects loop (SEND/RETURN jacks on the rear panel) allows you to integrate external effects pedals (e.g., delay, reverb, modulation) into the amplifier's signal path after the preamp section. Connect the SEND to your pedal's input and the pedal's output to the RETURN.
Warm-up sareng Cool-down: Ngidinan amplifier a few minutes to warm up after turning it on before playing. Similarly, allow it to cool down for a few minutes after turning it off before moving it.
Pangropéa
Proper maintenance will ensure the longevity and optimal performance of your SV20H amppanguat:
- beberesih: Pegatkeun sambungan nu amplifier from power before cleaning. Use a soft, dry cloth to wipe down the exterior. Do not use abrasive cleaners, solvents, or waxes.
- ngagantian tube: Vacuum tubes have a finite lifespan and will eventually need replacement. If you notice a decrease in performance, unusual noise, or a change in tone, it may be time to replace the tubes. Refer to a qualified technician for tube replacement, as this involves high voltages.
- Panyimpenan: Lamun teu dipaké pikeun période nambahan, nyimpen éta amplifier in a cool, dry place, ideally in its original packaging or a protective cover.
- Angkutan: Always disconnect all cables and allow the amplifier to cool down before transporting. Use appropriate cases or covers to protect the unit from physical damage.
Pamérésan masalah
If you encounter issues with your SV20H, try these common troubleshooting steps:
| Masalah | Mungkin Cukang lantaranana | Solusi |
|---|---|---|
| Taya sora | Power not connected, speaker cable loose/incorrect, instrument cable faulty, volume knobs down. | Check power connection, ensure speaker cable is securely connected to correct impedance output, test instrument cable, increase Loudness controls. |
| Sora lemah atawa menyimpang | Faulty tubes, incorrect speaker impedance, damaged speaker, effects loop issue. | Consult a technician for tube inspection/replacement. Verify speaker impedance. Test with a different speaker cabinet. Bypass effects loop to isolate issue. |
| Dengung atawa sora nu kaleuleuwihi | Ground loop, faulty cable, proximity to other electronics, worn tubes. | Ensure proper grounding. Use shielded cables. Move amplifier away from power supplies or fluorescent lights. Consult technician for tube check. |
| Taya lampu indikator kakuatan | Power cord disconnected, blown fuse, power outlet issue. | Check power cord connection. Replace fuse (refer to manual for fuse type and location, or consult technician). Test power outlet with another device. |
Upami masalahna tetep saatos nyobian solusi ieu, mangga ngahubungi tanaga jasa anu mumpuni.
spésifikasi
| Fitur | Rincian |
|---|---|
| Nomer modél | M-SV20H-U |
| Kaluaran Wattage | 20 Watt (tiasa dirobah janten 5 Watt) |
| Saluran | 1 (with 4 inputs: High/Low Sensitivity) |
| Kadali | Loudness 1, Loudness 2, Presence, Bass, Middle, Treble |
| Pangaruh Loop | Yes (Series) |
| Sumber Daya | Kabel Listrik |
| Alat nu cocog | Gitar |
| Tipe Panyambung | 6.35mm Jack |
| Warna | Hideung |
| Item Beurat | 25.3 pon (11.48 kg) |
| Ukuran produk (L x W x H) | 25 x 12 x 10 inci (63.5 x 30.48 x 25.4 cm) |
| Tanggal Kahiji Sadia | 24 Januari 2019 |

Figure 2: Dimensions of the Marshall SV20H ampsirah liifier.
Garansi sareng Rojongan
For information regarding warranty coverage and terms for your Marshall SV20H amplifier, please refer to the warranty card included with your product or visit the official Marshall Amplifikasi websitus. Simpen bukti pameseran anjeun pikeun klaim garansi.
For technical support, service inquiries, or to locate an authorized service center, please contact Marshall Amplification customer support through their official websitus atanapi inpormasi kontak anu disayogikeun dina dokuméntasi produk anjeun.
Official Marshall Websitus: www.marshall.com





