Blue Sky SUB 15 Universal Subwoofer

The THX® pm3 Approved, SUB 15 Universal, is a sealed box subwoofer, designed around a 15” forward-firing driver with a massive cast aluminum frame, dual 2.5” voice coils - which has almost 2.36” of excursion (peak to peak) and features an enormous 20+ Lbs. motor structure - total driver weight 36 Lbs.


One of the SUB 15 Universal’s unique features is a switchable low frequency response characteristic, of either 30Hz to 200Hz +/-3dB or, in “extended LF mode”, 20Hz to 200Hz +/-3dB (anechoic). The extended mode is ideal for large rooms that don’t exhibit the room gain phenomenon of smaller sealed spaces. In addition, the SUB 15 Universal also has built-in 2.1 bass management electronics with both a 4th order 80Hz Linkwitz-Riley low-pass filter and a 2nd order 80Hz high-pass filter that is compatible with the SAT 12’s bass-managed input and is also compatible with the I/ON, SAT 6.5 and SAT 5.


The SUB 15 Universal is also the second subwoofer from Blue Sky which allows you to add true low frequency extension to your existing nearfield and mid-field monitors. To accomplish this, the SUB 15 Universal includes dual independently tunable, state variable, high pass and low pass filters (50hz to 160Hz) with 4th order slopes.



Blue Sky SUB 15 Universal Subwoofer Features :


          o Bass Extension
            Add true bass down to below 20Hz (typical in-room response down to 20Hz)

          o Compatible
            Use with any nearfield or mid-field monitor, an ideal match for the Blue Sky SAT 12 and also compatible with the SAT 6.5 / SAT 6.5 MK II and SAT 5 / SAT 5 MK II. Additionally the SUB 15 is also fully compatible with any THX pm3 approved nearfield monitor.

          o Adjustable
            Easy tune crossover from 50Hz to 160Hz to match your monitors. Additionally, the low frequency response characteristic can be changed between -3dB @ 30Hz down to -3dB @ 20Hz. This allows you to adapt the SUB 15 Universal to the acoustic conditions of your room.

          o Sealed Box Design
            No port = no port noise = better transient response = greater SLAM!

          o Easy Setup
            Straight forward with excellent customer support, if needed.

Blue Sky SUB 15 Universal Subwoofer Specifications :

Active Subwoofer Enclosure :

.75" MDF with 1" front / rear baffle and internal bracing
Isolation feet are included
Dimensions: 20.75” H x 18” W x 20.63” D (inc / heatsink and grill)
Weight: 125 lbs. / 56.69 kg

15" Hemispherical Woofer :

15-inch high excursion (2.36" peak to peak) woofer with a vented 20+ Lbs. motor (total driver weight = 36 Lbs.)
Cast aluminum frame
Dual 2.5" high temperature voice coils
Dual progressive spiders
Mica filled polypropylene cone w/ Santropene surround
Fully video shielded

Amplifier :

Class-D
1000-Watts RMS into 4-Ohm
.1% THD + noise at rated power @ 1kHz
XLR balanced inputs / outputs
Adjustable gain control
Voltage Sensitivity      100mv = 90dB SPL @ 1 meter
Switchable low frequency response characteristic:
Frequency Resp. 30Hz mode     +/-3dB 30Hz to 200Hz
Frequency Resp. 20Hz mode     +/-3dB 20Hz to 200Hz
Low Frequency Cutoff (20Hz mode)     -3dB @ 20Hz

Bass Management :

Input impedance     10K balanced
Common mode rejection     40dB typical @ 60Hz
Maximum Input Level     +24dBu balanced
Output Impedance     200 Ohms balanced
Nominal gain     0dB
Direct In low pass filter : None

Switchable Filter Settings
Blue Sky Mode :

High Pass Filter     80Hz 2nd order
Low Pass Filter     80Hz 4th Order


Universal Mode :

Dual independently tunable state variable high pass and low pass filters
Frequency Range     50Hz to 160Hz
Filter Slope             4th Order