Definitive Technology are known for Home Cinema and bipolar arrays, no, not the up and down-ness of sufferers, but the twin opposing speaker design. Common to home cinema also. The BP series is the ‘backbone of Definitive’, they say. Their smaller passive Demand D11’s are being appraised in this film here.
The idea is you can sit pretty much anywhere you like in the room and you will feel the sweet spot. This is certainly true of trying their Demand D11’s. The *mind-stick* is of a speaker that is dispersive, great off axis, tonally rounded and linear. An all rounder 2channel and home cinema speaker for medium to big rooms.
Located 600 feet from Ground Zero in New York, apparently Definitive Technology helped with speakers in the aftermath of 9/11 when the organ at Trinity Church was damaged. Installing sixty DT BP10B Tower speakers and eight BP30 bipolar towers. Worth a listen and visit!
DT have headquarters based in California, however these speakers met the rolling Downs of the Sussex Countryside in the UK, during this test. I tried them with the excellent Marantz PM7000N, part of the same group – Sound United. A good combination. Also with a Hegel H120 Streaming Amp, to be the subject of my next film. They also met Neat’s Iota Alpha’s from the North East of England.
Demand D11’s : Specifications
- 6.5″ (16.51 cm) d (Round) Polypropylene BDSS Bass – Mid/Woofer
- 1″ (2.54 cm) d (Round) Annealed Aluminium Dome and Laterally Offset – Tweeter
- 6″ (15.24 cm) h x 10″ (25.4 cm) w (Oval) Passive – Bass Radiator
- Total Frequency Response : 48 Hz → 24,000 Hz
- Nominal Impedance : 8 ohms
- Sensitivity (1 watt @ 1 metre) : 90 dB
- Driver Enclosure Type : MDF cabinet with extruded natural bead-blasted aluminium front baffle
- Recommended Amp Power – 20w-200w
- Speaker Inputs : Twin terminals (bi-amp/bi-wire)
- Dimensions : WxHxD – 18.42cm x 33.02cm x 31.75cm
- Acoustically transparent speaker grilles included (optional use)
- ST1 Speaker Stands (sold separately)
$999 / £999
ST1 Stands : $300 / £300
Post-script : S(t)and Filling
ST-1 stands work best if they are filled with sand or gravel, or even better a dedicated stand filler like Atacama Atabites which are available online from various retailers (inc Amazon). This of course helps to eliminate resonance and provide an even more stable mounting for the D11’s.