big Fun 20

Produktion 2009-2015
Pure power: a true bass-horn with no compromises embosses the top model of this series.

If good is not good enough then You have the chance to step up with compression chamber bass horn. The speed, the plenty and the involving feeling coming from this particular construction will stand even the hardest examination. Studied to perform in the most spectacular way and disappear in the room in a fireworks of music.
The big Fun 20 fits to its name, come one big step nearer to the sound!
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Blumenhofer Acoustics big Fun 20

Words of the press - Article

If you're into 'real' music like they play in your downtown clubs [...], the Big Fun 20 is perfect to get down and dirty with, not nasty and tiresome.
It's a big friendly sound that goes loud without pain and seems tailor-made for Rockers young and old.
It's about live sound eight to ten meters from the stage. Just because most audiophiles no longer reference reality does not mean Blumenhofer got it wrong.

Specifications of the big Fun 20

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Relative Dimensions big Fun 20
High efficiency
2-Ways loudspeaker


• Compression Chamber Bass-Horn
• 25mm Birch plywood
• Resonance and flow optimized bass horn
• Separate chamber for the crossover
• High complex internal bracing


• 1.4" Compression Driver with Titan membrane
• 20cm (8") P2F® Paper Woofer
• Gold plated tellurium copper terminals


• Bi-wiring- / Bi-amping -termnials
• Switchable impedance linearization for the crossover frequency
• Flat impedance curve
Tube Friendly
Time alignment to the listening spot
• 10 years Warranty

Technical data of the big Fun 20

big Fun 20
MaterialMaterialMaterialeBirch plywoodBirke MultiplexMultistrato di betulla
ThicknessMaterialdickeSpessore25mm / 1"
Internal BracingVerstrebungIrrigidimentoStructural bracing interactionStrukturelle InteraktionInterazione strutturale
Cross over chamberKammer für FrequenzweicheVolume separato per filtroYesJaSi
Frequency rangeFrequenzgangRisposta in frequenza40Hz - 20kHz ± 2dB
Bass CabinetBass GehäuseCabinet dei bassiBass hornBasshornBasso a tromba
Horn typHorn TypTipo di trombaCompression chamberDruckkammerCon camera di compressione
Horn loadHorn RichtungCarico a trombaFloorZum BodenA pavimento
WooferTiefmitteltönerWoofer200mm / 8"
P2F® Sandwich
P2F® Sandwich
Sandwich P2F®
Cross over frequencyÜbergangsfrequenzFrequenza di taglio1150 Hz
MidhighMittelhochtönerMedioaltiCompression driverKompressionstreiberDriver a compressione
Horn ThroatHornDiametro tromba1,4"
Membrane dimensionsMembranendimensionDimensione Membrana65mm / 2,5"
MaterialMaterialMateriale TitaniumTitanTitanio
Max power inputBelastbarkeitPotenza massima (RMS)150 W RMS
EfficiencyWirkungsgradEfficienza95 dB
ImpedanceImpedanzImpedenza8 Ohm
Impedance linearizationImpedanzlinearisierungLinearizzazione d'impedenzaYesJaSi
MaterialMaterialMaterialeGold plated tellurium copperVergoldetes tellurium KupferRame tellurio placcato oro
FeetsFüßePiediAdjustable SpykesRegelbare SpykesSpykes regolabili
DimensionsMaßenDimensioni 1090 x 325 x 535 mm
43 x 12,8 x 21 in
WeightGewichtPeso50 kg
Packaging dimensionsVerpackungsmaßenDimensioni imballate-
Loudspeakers per cartonLautsprecher per KartonPezzi pro cartone1
Packaging weightVerpackungsgewichtPeso imballate70 kg

Dimensions of the big Fun 20

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Picture Gallery of the big Fun 20


In our workshop we can offer true-wood veneers.
Wood is a natural product and depending on several factors might have different color and structure. Color and structure variations of the surface are not to be considered flaws.