|Dimensions||330 x 1780 x 200 mm (W x H x D)|
|X/O frequencies||210 Hz and 2500 Hz|
4 x Peerless HDS 5.25" Exclusive (831882)
4 x Peerless SLS-10" (830668)
|Impedance||8 / 8 / 4 ohm|
Enclosure is not so heavy. Internal part of 30 mm MDF is very light.
Enclosure drawing: KS-009.pdf
LR2&4 (30.03.2008): KS-009LR2&4.xpc
Download Behringer DCX-Remote16a.exe to investigate xpc files.
Gain of power amplifiers:
Simulated vertical directivity. Drivers are monopolic - so this is not
even close to real life:
Frequency response wth LR2&4 crossover
Phase response with LR2&4 crossover
Step response with LR2&4 crossover
Distance: 260 x 95 cm, 0°.
Adaptive (blue): filtered PIR + 600ms, smoothing 1/12 oct
Linear (red): 600ms, average smoothing 1/3 oct
Median (green): 600ms, median smoothing 1/3 oct
Average (black): average of previous three curves
Level of 300...800 Hz is too low compared to higher frequencies. Slightly too much mid-bass also.
90 dB at 1 meter
Dynamics and slamming of higher frequencies is moderate. Bass slam is... hmmm... dipolic.
Horizontal listening range is not exceptionally large. Upper midrange yodels to 90 degrees, restricting listening sector below 360 degrees. Listening is possible over longer distances and higher elevation. Longer distances increases presence. "They are here" illusion and naturality are ok, but there's not too much "flavor of life" in the reproduction.
Tracing of bass notes is good, but better exists. Bass is soft and
tempo slow - like with lowered pitch. Bass extension is enough in our
Midrange is very good but slightly thin. Sound balance is not perfect - there could be more level at lower midrange from 300 Hz to 800 Hz to decrease thinnes and bring vocals in front of the band. This is adjustable with active X/O - of course.
Clarity and transparency of treble is not very good over longer distances. There was also some resonance at low treble. Measurement shows ageing symptoms at 6-7 kHz.
Soundstage is logical and exact but not needle-sharp. It's higher and deeper than with average box speaker. Sometimes high frequency voices disintegrate to the speakers. Especially classical is divided into speakers too much if listening triangle is close to equilateral. Etheric - floorless floating of vocals doesn't exist.
Speakers are ok even there were compromises everywhere. This project proved that it's possible to make a good dipole speaker without special intelligence, knowledge, luck, materials and working methods. Dipole is able to fix and hide many kind of shortages in design. Maybe this is the reason why open baffles are so popular.
Page updated 19.10.2010