Designed to complement the VS2108, VS3208, VH3208 and Q210, the VS1115b is an active sub-woofer that extends the low frequency response of the monitoring system. The VS1115b offers 4 inputs/summing and 4 output sections that extract the low bass for the LCR channels, with the summing facility allowing the use of a single mono, or two stereo subs, if preferred. The 4th effects channel input has its own trim controls covering a different frequency selection and slope that is compatible with 5.1 ... requirements. There is also a balanced summed line level output for paralleling multiple sub-woofers and controls are provided for polarity reversal and phase adjustment.
The built-in amplifier provides over 400W continuous RMS power to the custom designed, external, radial chassis 380mm (15") unit. The amp can be rotated on its sub-baffle, allowing the cabinet to be mounted in either portrait or landscape format.
Applications include broadcast, mobile, editing, post production, project/home studios, nearfield monitoring and main monitoring in mid-sized rooms.
Specification
Size (WxHxD) 685mm x 550mm x 695mm (27" x 21.75" x 27.5")
Weight 62 kgs (137 lbs)
Driver Bass: 380 mm (15 in)
Maximum SPL LCR 110dB(C) Effects 113dB(C)
Inputs
Connectors: 4 off XLR Female: Left, Centre, Righ, Effects
Impedance: 10 kohm. Electronically balanced RFI filtered
Wiring: Pin 1 Ground, Pin 2 Hot, Pin 3 Cold
Outputs
Connectors: 4 off XLR Male: Sub, Left, Centre, Right
Impedance: > 100 ohm electronically balanced
Wiring: Pin 1 Ground, Pin 2 Hot, Pin 3 Cold
Full Range Channels
L,C,R input to output High Pass: 38HZ at 12dB/oct.
Passband gain: 0dB
Sub Woofer Channel
Signal Path: All inputs are passband filtered and summed to Sub output and Sub amplifier.
L,C,R input to Sub: High pass: 15Hz at 18dB.oct.
Low pass: 38Hz at 12dB.oct.
Effects input to Sub: High pass: 15Hz at 18dB.oct.
Low pass: 100Hz at 12dB.oct.
Effects level trim: +/- 10dB
Sensitivity switch: +4dBu for nominal level: clip > +16dBu input at 22 Hz
or
-10dBu for nominal level: clip > +2dBu input at 22 Hz
Level Trim: Rear rotary preset +/- 10dB
Signal Polarity: Rear switch to invert sub channel polarity
Phase Correction: Rear rotary preset to adjust 10-170 degrees at 38 Hz
Power Amplifer
Sub output power >400W rms into 8 ohm continuous.*
T.H.D. <0.03% at levels up to 1dB below clip, 10Hz - 100Hz typ. 0.005% at 20W rms 20Hz.
Hum + Noise >-105dB referred to clip
Indication
Power on Front mounted LED (green) indicates power applied
Overload Front mounted LED (red) indicates 0.5dB below signal clip.
Thermal protection Front mounted LED turns red, signal is muted and amplifier switches to standby mode during thermal protection cooling cycle. Normal operation resumes when heatsink temperature drops by 20°C.
Power requirements
Voltage Set by internal plug: nominal 115V or 230V at 50 - 60Hz AC.
230V setting: Min 160V (restricted output power): Max 263V
115V setting: Min 80V (restricted output power): Max 132V
Consumption Quiscent: 45W. Typical use: 150W. Max: 580W.
*Note: The continuous rating is for a period not exceeding 5 minutes with unrestricted airflow (100mm clearance) around the amplifier heatsinks and ambient temperature <30°C.
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