Wavemark
Speaker Guides
Buying advice for 18" sub drivers and plain-English explainers on how PA speakers work, from Thiele/Small parameters to horn loading.
Buying guides
15 vs 18 Inch Subs15 vs 18 inch subs compared: cone area, low-end extension, output, cab size, weight and which suits mobile DJs, PA hire and big sound system rigs.
18" Replacement Driver GuideLooking for a replacement or alternative to a Precision Devices, B&C, Eighteen Sound, RCF or Celestion 18" sub driver? Compare published specs with Wavemark drivers.
4 Ohm vs 8 Ohm Speakers4 ohm vs 8 ohm speakers explained: power from your amp, wiring cabs in parallel and series, minimum loads, and which impedance to choose for sub drivers.
Choosing an 18" Driver for Scoop BinsWhat matters when choosing an 18" driver for scoop bins and rear-loaded horns: BL, Qts, power handling, suspension and cabinet fit.
How Many Subs Do I Need?How many subs do I need? Think through venue size, music style, sub-to-top ratio and coupling to plan a bass rig, without relying on made-up formulas.
How to Choose the Best 18" Sub DriverHow to choose the best 18 inch sub driver for your UK rig: match it to your cab type, read T/S parameters, coil size, power, impedance and budget.
Scoop vs Reflex vs Horn SubwoofersHow bass reflex, scoop bin and folded horn subwoofer cabinets compare on efficiency, size and sound, and which 18" driver suits each.
Speaker science
Cabinet Tuning BasicsHow reflex box volume, port area and port length set the tuning frequency, and where to tune sound system subs.
Compression Drivers and HornsHow a PA compression driver and horn work: phase plugs, throat sizes, directivity and protecting the diaphragm.
Crossover BasicsPassive vs active crossovers, filter slopes, typical crossover points and time alignment for PA and sound systems.
Ferrite vs NeodymiumWeight, cost and heat: how ferrite and neodymium speaker motors compare for PA and sound system use.
Horn Loading ExplainedHorn loading explained: how a speaker horn boosts efficiency, what throat, mouth and flare do, and how folded horns and scoop bins use it for bass.
Impedance and Wiring SubsHow to wire 8 ohm and 4 ohm subs in series, parallel and series-parallel, and match the load to your amplifier.
Line Array vs Point SourceLine array vs point source speakers compared: how each spreads sound, where line arrays win, and why point source stacks still suit most UK events.
Matching an Amplifier to Your SubsHow much amplifier power your sub drivers need, why clipping kills speakers, and how to read amp specs.
RMS vs Program vs Peak PowerWhat AES, RMS, program and peak power ratings really mean on a speaker spec sheet, and which to compare.
Sensitivity and DecibelsHow speaker sensitivity works, plus the decibel rules every sound system builder should know.
Speaker Distortion ExplainedSpeaker distortion explained: harmonic and intermodulation distortion, amplifier clipping, and how Xmax and BL nonlinearity limit clean bass output.
Speaker Frequency Response ExplainedSpeaker frequency response explained in plain English: how to read the graph, what the ±3 dB figures mean, and why a bare driver plot differs from a cabinet.
Speaker Phase and Polarity ExplainedSpeaker phase and polarity explained: the difference between them, how to check wiring, and how to align subs and tops so they add up instead of cancelling.
Sub Arrays: End-Fire, Cardioid and SpacingSub arrays explained: how end-fire and cardioid subwoofer arrays cut bass behind the stack, plus spacing rules to avoid power alley and dead spots.
Tweeters vs HornsDome, bullet, piezo, ribbon and compression horn tweeters compared for PA and sound system tops.
Voice Coils and HeatWhy voice coil size, former material and motor venting decide how a sub driver performs after hours of hard use.
What Thiele/Small Parameters MeanFs, Qts, Vas, BL, Xmax and the rest explained in plain English, with a worked example from the Wavemark WM1850/8 18" driver.
Xmax and ExcursionWhat Xmax and Xlim mean, why excursion quadruples every octave down, and why subs need a high-pass filter.
Reference
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