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12
VXP Series
Controls
(1)
(2)
(3) (4)
(1) INPUT audio input jack accepts balanced XLR connections from audio sources. Pin 1 = ground; pin 2 = hot (+); pin 3 = cold (-).
(2) LINK audio output jack sends out a copy of the INPUT signal for use with other speakers. The LINK jack accepts balanced XLR connections: Pin 1 = ground;
pin 2 = hot (+); pin 3 = cold (-). Multiple enclosures may be driven from a single audio source. Simply plug the signal source output into the first speaker's
INPUT XLR socket, and then patch that speaker's XLR LINK output to the next speaker's INPUT XLR socket.
(3) FILTER switch can be used to insert a high-pass filter into the signal chain. When set to HPF, the high-pass filter is engaged. When set to FR (Full Range),
the high-pass filter is inactive.
(4) POWER switch selects between AUTO or MAN (Manual) power modes. In AUTO mode, the amplifier switches into Standby if no signal is detected for a period of
20 minutes; if a signal is detected while in standby mode, the amplifier will power back on within 2 seconds.
(5) LEVEL control sets the output volume using a recessed potentiometer.
(6) LED INDICATORS display the power status, signal status, and the status of the built-in speaker protection limiter (see "LED Functions" below).
(7) POWER rocker switch turns the unit on/off.
(8) MAINS jack connects to AC power using cables equipped with Neutrik powerCON connectors (mating connector supplied).
(8)
(5) (6) (7)
Operation
AC Power Requirements
VXP Series loudspeakers are equipped with Neutrik powerCON mains connectors, which quickly lock into place inside the MAINS AC jack.
This AC mains connector is supplied with each VXP Series loudspeaker.
The LAB GRUPPEN IDEAA™ module in VXP loudspeakers features a universal power supply that will operate on any AC mains supply from 70 V to 265 V (+/- 10%) at
50 or 60 Hz, although with reduced power output capability at the low voltage extremes. This tolerance of varied AC mains voltage allows continued operation even
when using long, thin power cables, or when the unit is powered by portable generators that cannot maintain full nominal voltage.
Auto and Manual Power Modes
VXP Series loudspeakers offer two modes for power on/off:
AUTO mode – This POWER switch setting is the default mode. AUTO engages the Auto Power Down (APD) feature which puts the IDEAA™ module into Standby mode
if no input signal is detected for a period of 20 minutes. Auto Power On (APO) turns the module back on in less than 2 seconds after a signal is detected at the input.
MANUAL mode – The power mode may be switched to MAN to disable the auto-power-down and auto-power-on functions. This allows use of an external power
sequencer or manual control.
LED Functions
The LIM/PROT LED lights up when the built-in limiter is active and system is approaching clipping. An occasional flicker of the red LED on the loudest peaks is
acceptable. If this LED remains red for more than the duration of brief dynamic peaks, or lights continuously, then the system is being overdriven.
If the red LED illuminates excessively:
• Reduce the input level
• Reduce the output level of the mixer, or other source to the speaker
The SIG LED lights up when an audio signal is present at the INPUT jack.
The PWR LED lights up to indicate several system conditions:
• Green = Active (AC power present at MAINS connection, PWR switch ON)
• Red = Standby
• Amber = Temperature protection active
Cooling
Do not install this equipment in an enclosed space. Do not limit free ventilation and movement of air around the back panel. Ensure that there is at least 100 mm (4")
of space around all sides of the product for ventilation. VXP Series loudspeakers do not have cooling fans; the highly efficient switch mode power supply and
proprietary Class D output stage have low current draw and therefore require only the convection cooling provided by the rear panel heat sink.
Gain Structure
The VXP Series gain structure is designed to allow a low-level source device to drive the loudspeaker to full output. Maximum specified SPL will be achieved with
a 4 dBu input signal. There is sufficient headroom in the signal path to accommodate input levels of 10 or even 20 dBu, with high quality compression engaged as
needed to maintain sonic integrity without clipping. To avoid any compression, or when a lower SPL output is desired, the input attenuator on the rear panel can be
used to reduce gain/sensitivity.
Limiters
The limiters are carefully set-up to preserve the loudspeaker's dynamic headroom by allowing short term transients to pass through. Audible degradation will only
become apparent when the LIM/PROT indicator is on constantly.
The limiting functions will protect the amplifier from long term overheating by attenuating voltage to the drive units. If used irresponsibly (constant hard clipping)
sound quality will be compromised. In extreme cases drive units may also be damaged.
13
Quick Start Guide
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