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A pub gig is not a stadium gig with fewer people. It is its own acoustic environment: low ceilings, soft furnishings, hard floors, a corner stage, and often a PA that only covers vocals. Before you look at amplifiers, ask what the room actually needs. A 50-capacity pub with carpet and a low ceiling will swallow volume differently from a village hall with high ceilings and wooden floors. If there is a house PA, your amp may only need to be a monitor for you and the band. If there is no PA, the amp has to carry the room.
Practical questions: how many people? Is the stage in a corner or along a wall? Are there hard reflective surfaces? Will the landlord want volume down after 10pm? A small valve combo that sounds glorious at home can be too loud or too beamy in a pub. A solid-state amp with a balanced DI output can be more useful. The room, not the badge on the grille, should decide.
Headroom is the clean, uncompressed volume an amp can deliver before it distorts. For small venues, headroom matters more than maximum wattage. A 15W valve amp can be loud enough for a pub rock trio, but it may already be breaking up at that volume. A 50W solid-state amp may stay clean, but it can sound thin and hard when pushed. Match the amp to the band and the room, not to the number on the box.
As a rough guide, a 5–15W valve amp suits a quiet acoustic duo, a jazz trio, or a vintage electric set where breakup is part of the sound. A 15–30W valve amp covers many pub gigs with a drummer who knows how to play quietly. A 50–100W solid-state or class D amp gives clean headroom for acoustic instruments, backing tracks, and larger function rooms. If you need clean nylon-string classical guitar at volume, err on the side of more clean power and a more efficient speaker.
Valve amps are warm, touch-sensitive, and forgiving in the midrange. They also weigh more, need occasional servicing, and can be fussy about impedance. Solid-state amps are lighter, cheaper to run, and often have useful features such as DI outputs, headphone sockets, and digital reverb. Hybrid designs combine a valve preamp with a solid-state power section, which can give warmth without the weight. For small gigs, none of these is automatically better. The question is whether you need valve compression at low volume or clean, consistent output.
If you buy vintage, budget for a service. Old electrolytic capacitors, tired valves, scratchy pots, and two-core mains leads are common. A qualified tech should check the earth, replace the mains lead with a three-core earthed cable, and check bias. A vintage amp that hums, crackles, or shocks is not charming; it is a liability. In the UK, use an RCD-protected supply and get the amp PAT tested if you play in venues that ask for it.
Speaker efficiency is the most overlooked part of the rig. It is measured in decibels per watt at one metre, usually written as dB SPL 1W/1m. A speaker rated at 95dB will be noticeably quieter than one rated at 100dB. Because a 3dB increase is roughly equivalent to doubling amplifier power, a 100dB speaker can make a 15W amp sound like a 30W amp through a 97dB speaker. That is free volume, free headroom, and often better tone at low settings.
Impedance also matters. A valve amp wants the correct load: 8Ω into 8Ω, 16Ω into 16Ω, and so on. Mismatches can cost volume, wear valves, or damage the output transformer. Solid-state amps often deliver more power into 4Ω than 8Ω, but check the manual. For acoustic guitars, a 10-inch or 12-inch woofer with a tweeter gives detail for fingerstyle and nylon-string parts. For vintage electric tones, a closed-back 1x12 with a high-efficiency speaker can turn a small combo into a gig-ready rig.
The best amp is the one you can carry up a narrow pub staircase at 8pm without needing a chiropractor. Valve amps are heavy because of transformers and iron. A 1x12 valve combo can weigh 20kg or more. Solid-state and class D amps can be under 10kg, and neodymium speakers shave off more. If you use public transport, weight and size matter even more. Measure your car boot, check door widths, and consider a folding trolley and a padded cover.
Small venues rarely have a dedicated load-in. You may park two streets away, squeeze past a fruit machine, and set up in a corner. Castors help on flat floors but rattle on stage; removable castors or a trolley are better. A lightweight amp with a good DI output can also save you carrying a separate cabinet. If you teach during the week and gig at weekends, a 30W solid-state combo with a 10-inch speaker and an XLR DI may be the most practical single purchase you make.
Acoustic and classical players have different needs from electric players. Nylon-string guitars with under-saddle piezo pickups often need a high-impedance input, typically 1MΩ or more, to avoid a thin, quacky sound. An acoustic amp with a tweeter, a phase switch, and a notch filter will handle feedback better than a standard electric amp. If you play classical repertoire in a small hall or church, a clean class D amp with a balanced XLR DI lets you send a consistent signal to a PA whilst keeping a small monitor on stage.
Vintage electric players should think about low-wattage valve amps, efficient speakers, and attenuators. A 5–12W valve amp with a 97dB+ speaker can cover a pub gig if the drummer is sensitive. If you need more clean headroom, a 20–30W valve amp with a master volume or a good attenuator gives flexibility. For solid-state players, a 50W amp with a 12-inch speaker and a DI output is a reliable pub workhorse. Whatever you choose, test it at gig volume, not bedroom volume. An amp that sounds warm at home may sound harsh and beamy in a tiled function room. Let the room, the band, and your back decide.
Guitar Classics shares practical, down-to-earth guidance on classical, acoustic and vintage guitar music, gear and tuition for uk players for readers across the UK.
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