Ground Zero Offer New Competition-Grade SQ Subwoofers

Ground Zero, the brand that Edd Elson used to conquer all before him and become UK Bass King 2012, make far more than just killer bass products. They also produce SQ speakers so damn high end that they have to be specially ordered, are made with cones of genuine German Black Forest Faerie wings (pulled off humanely) and with magnets made of Unobtainium from the planet Pandora.
And now they have turned their attention to the subject of posh woofers to compete in EMMA Sound Quality competitions. They have to go deep. They have to stop when the bass does and not overhang at all. They have to be melodic and play well across a big pass band of lower frequencies and most of all, they should just sound delicious. Well, with the Uranium series, Ground Zero reckon they have cracked it. Here’s what they have to tell us about them&;
Uranium Series subwoofers from Ground Zero.
‘These are SQ babies and geared towards EMMA competitors and those who prefer the more subtle approach.’
They feature the following key features:
– Cast baskets
– Strong paper cones
– Dual 2 Ohm Copper voice coils on Kapton formers
– Audiophile POLYCOT spiders

Available in 10in and 12in sizes, these woofers will be available in the UK from September at approx £150 each.
Model GZUW 10SQ
Diameter: 250mm/10in
Mounting diameter: 236mm/9.29in
Mounting depth: 131mm/5.16in
Voice coil: 50mm/2in Round wire
Cone: Reinforced paper
Power Handling: 400 WRMS
Impedance: 2 x 2 Ohm
Efficiency/SPL: 86dB
Xmax: 15mm/0.59in
Fs: 35.7Hz
Qts: 0.62
Vas: 25.9L/0.91 cu.ft.
Box recommendation vented: 42 Litre/1.65 cu.ft – Port 1x Ø 8cm/3.15in, Length= 21 cm/8.27in
Box recommendation sealed: 20 – 30 Litre/0.71 – 1.06 cu.ft

Model GZUW 12SQ
Diameter: 300mm/12in
Mounting diameter: 284mm/11.18in
Mounting depth: 140mm/5.51in
Voice coil: 50mm/2in Round wire
Cone: Reinforced paper
Power Handling: 500 WRMS
Impedance: 2 x 2 Ohm
Efficiency/SPL 88dB
Xmax: 15mm/0.59in
Fs: 33.8Hz
Qts: 0.63
Vas: 50.4L/1.78 cu.ft.
Box recommendation vented: 56 Litre/1.98 cu.ft – Port 1x 10 cm / 4in, Length = 26cm/10.24in
Box recommendation sealed: 35 – 50 Litre/1.24 – 1.77 cu.ft
CAD