Lab.gruppen C 68:4 Technical Data

An Installation Amplier without Compromise
Installed or on tour, uncompromising quality begins with supe-
rior sound. Over the past decade, the sound of Lab.gruppen ampli-
ers has earned praise from renowned FOH engineers and owners
of the world’s premier sound rental companies. At the core of
the C Series high-power* model’s tight and transparent sound is
patented Class TD technology. As a proprietary implementation of
tracking Class D, Class TD approaches the exceptional efciency of
Class D while retaining the superior sonic quality of the best Class B
output stages.
A Regulated Switch Mode Power Supply (R.SMPS) contributes to
the remarkable efciency of the C Series high-power models, while
at the same time providing stable operation even with wide uctua-
tions in mains voltage. R.SMPS also works in conjunction with Class
TD to give extraordinary power density. More channels with more
power are condensed into a smaller package, allowing C Series
ampliers to minimize rack space requirements and reduce installa-
tion costs.
Extreme power density demands efcient cooling, and here
Lab.gruppen’s Intercooler
®
proves remarkably effective. Thousands
of small copper cooling ns dissipate heat, and all output devices are
mounted on one row perpendicular to airow for uniform cooling.
C Series ampliers are uniquely capable of adapting to a wide
variety of demanding load conditions. Each channel has an
individually congurable Voltage Peak Limiter (VPL), which allows
the output to be optimized for any loudspeaker load – whether one
massive subwoofer or a series of small 100 V loudspeakers. VPL
works in combination with adjustable input gain to achieve maximum
headroom regardless of input levels or output impedances.
To assure reliability, and minimize service interruptions, C Series
ampliers offer comprehensive warning and protection features.
Whenever faulty wiring, improper use, or extreme ambient tempera-
tures threaten trouble, a C Series amplier gives clear and accurate
warning indications. Protection measures are inserted only when
dangerous thresholds are passed. Conditions are re-checked at
six-second intervals, and normal operation resumes when measure-
ments return to nominal.
Every C Series amplier is ready for the NomadLink
®
network right
out of the box. With NomadLink
®
, key amplier parameters are
displayed via DeviceControl software, and remote control of chan-
nel mutes and power on/off is under network control. (NomadLink
®
requires the separate NLB 60E NomadLink
®
Bridge & Network Con-
troller.)
▸ Auditoriums
▸ Performing Arts Centers
▸ Convention Centers
▸ Stadiums and Arenas
▸ Theme Parks
▸ Hotels
▸ Houses of Worship
▸ Restaurants
▸ Clubs
▸ Educational Establishments
▸ Boardrooms
▸ Museums
▸ Ofces
▸ Shopping Malls
▸ Transportation Facilities
Applications
C 28:4
* C Series high-power models are:
C 88:4, C 68:4, C 48:4, C 24:4 and C 16:4
▸ Unprecedented power density – Total output of 2800 W
(4 ohms) in a 2U cabinet
▸ Four channels – All channels bridgeable for 2- or 3-channel
congurations
▸ Lo-Z or Hi-Z (70 V / 100 V) – Selectable per channel, normal or
bridged
▸ Patented Class TD amplier topology
▸ Voltage Peak Limiter (VPL) – Congurable per channel to
optimize each output for connected loads
▸ Phoenix-type input connectors
▸ Screw terminal output connectors
▸ Comprehensive protection and warning – Excessive output
current, DC, high temperature, very high frequency (VHF), short
circuit, open load, mains fuse protection, and soft start
▸ Efcient and uniform Intercooler
®
cooling
▸ NomadLink
®
network ready
Technical Data
C Series: Dedicated Installation Amplifiers

Lab.gruppen C 68:4 Specifications

General

Brand	Lab.gruppen
Model	C 68:4
Category	Amplifier
Language	English