Has increased vent area and slightly increased vented chamber volume. This helps the noise, compression and output near the vent tuning.
Increased vent area and length means that the vent pipe resonance is lower in frequency than the Skhorn. Expect that the response will be less smooth above 150Hz, but that's the tradeoff made for bigger vents.
The Skram has 4 vents instead of 3 like on the Skhorn. Tuning with all vents open is basically the same.
Being a single driver design, the Skram does not have the dual opposed drivers for mass induced vibration control like in the Skhorn
Skram Dimensions: 24"x32"x36" (609.6mm x 812.8mm x 914.4mm)
Weight: Cab=115lbs or 52kg projected (Driver will add another 25 to 55lbs (11 to 25kg) depending on the driver.
Vent Tuning: All vents open = 29.5Hz / 3 vents open = 25.5Hz / 2 vents open = 20.5Hz / 1 vent open = 14.5Hz
Each vent is greater in area than a 6" pipe. All vents open is equivalent in area to 4x 6" ports.
All of the usual pro 21's should be a good match.
18Sound 21ID, 21NLW9601
B&C 21DS115, 21SW152, 21Ipal
RCF LF21N551 looks decent
Lavoce SAN214.50
Eminence NSW6021-6.
