System installers in search of a compact, flexible amplifier with Hi-Z and Lo-Z output capabilities should check out the Lab.Gruppen E 5:4, a 1 RU, four-channel 500W amplifier for mixed A/V installation applications. The E 5:4 utilizes IntelliDrive Energy Efficient Amplifier (IDEEA) technology to produce high power levels with very low distortion while drawing minimal mains current.

E-Series amplifiers also utilizes Lab.Gruppen's proprietary Rail Sensing Limiter (RSL) technology, which greatly reduces signal clipping to ensure high-quality audio output all the time. The amplifier is user-configurable for Hi-Z (70/100V) or Lo-Z. The RSL circuit senses rail voltage and optimizes each channel output for instantaneous load conditions. This allows for asymmetrical channel loading for optimized performance and efficiency. Total available output power can be allocated among the channels as required by the application. This makes it possible, for example, to drive a small sub on one channel and several 70/100V ceiling loudspeakers on the other channels.

Two-Channel Amplifier: 4 x 125W    IntelliDrive: 70/100V or 4, 8, 16 Ohms    Energy-Efficient Class-D Amplifier    Asymmetric Channel Loading    Comprehensive Circuit Protection    Rail Sense Limiter (RSL)    Includes Screw Terminal I/O Blocks    Includes Power Cord    Limited 5-Year Warranty

• 500W amplifier carrying 4 flexible output channels in a high power density 1 rack unit form factor saves rack space and system cost
• Energy efficient with Energy Star certification for supreme green credentials and exceptionally low lifetime running costs
• Flexible IntelliDrive permits delivering the 4 x 125W at constant voltage 70/100V or low impedance (4, 8, and 16 ohms) on any channel
• Asymmetric channel loading allows mixing and matching loads with different impedances to maximize overall system efficiency and inventory utilization
• High-efficiency amplifier with low power consumption and minimized heat generation lowers demands on the installations' mains distribution and cooling systems
• IDEEA outputs stage based on proprietary, state-of-the-art Class-D amplifier technology for superior performance
• Comprehensive fail-safe circuit protection ensures continued operation even under reduced operating conditions
• Auto-standby and auto-power-on reduces power consumption to below 1W in non-operating cycles
• Rail Sense Limiter (RSL) greatly reduces signal clipping and ensures simple configuration for constant voltage and low-impedance loads
• Built-in 50 Hz high-pass filter selectable per channel available on rear-panel switch
• Per-channel attenuation knob and signal LED on rear panel for simple commissioning
• Efficient cooling with temperature-controlled fan with front-to-back airflow
• Aluminum front panel with power and temperature LEDs and per-channel signal and limit LEDs
• GPIO connector with power control and indication for further system integration
• Balanced high-quality analog inputs and amplifier outputs on detachable screw terminals

Related Questions and Answers

Q: 1. Can the canon Rebel Ts1i LP-85 Watson battery be changed in Europe Using Canon battery charger LC-E5? Or Do I need a different adapter/charger? Have regular adapters

A: Yes. The battery will charge using the original canon charger overseas.

Q: 2. Speakers ratings, should I take minimum or peak as reference to match my speakers to an amplifier?

A: You should take both ratings into consideration if they are provided. RMS power ratings provide a better idea of the continuous power that is provided by an amplifier or when an RMS rating is listed for a speaker, it is the amount of continuous power that a speaker can handle. Peak power ratings refer to occasional short bursts of power that an amp can provide or the amount of power in a short burst that a speaker can handle. When only peak power ratings are provided, you can determine the RMS power rating by multiplying peak power x 0.7071. For example, if an amplifier is rated at 800 watts peak power, multiply 800 x 0.7071 which equals 565.68, meaning the amp's RMS power is approximately 566 watts.

Q: 3. Got a pair of yamaha cbr15 inch speakers. Will px5 be suitable for the speakers

A: Yes, the Yamaha PX5 Stereo Power Amplifier is compatible for use with a pair of Yamaha CBR15 Speakers.

Q: 4. Will this battery work in a Canon Rebel Ti1?

A: This battery will work for a Canon T1i.

Q: 5. When an input is set to line does it transmit phantom power? If I use phantom power because I need it for a microphone input will it damage the Denon DN-300ZB that is also plugged into two of the input channels but set to line mode.

A: No, engaging phantom power for microphone input connections on the JBL CSM 28 Eight Inputs/Two Outputs Commercial Series Mixer would not affect a connection from a line level source such as the Denon DN-300ZB Media Player. It should be noted that the phantom power offered from this amplifier is 27VDC as opposed to the more common 48V.

Q: 6. Does this only allow me to send the same input to multiple zones or can I run two separate inputs through this to different speakers in multiple zones? I cant read what the output section says but I see the outputs all have different power considerations

A: You can send only the same mix to different zones although you can selectively turn on and off zones.

Q: 7. Is the bridge mode a method of chaining two or more devices together for multi-room output of the same signal?

A: No. Bridge mode means wiring two amplifiers together to output more power, typically for the purpose of powering speakers that require higher wattage.

Q: 8. Can this amp be used to power MCM 55-10345 tweeter array? These are not powered and can't be heard, or would some other small amp work? Any suggestions. Thanks, EYD.

A: Yes it can.

Q: 9. Does this include the rack brackets with purchase?

A: Yes. The rack mounting kit is included.

Q: 10. Is this battery compatible with the Canon Rebel XSi?

A: Yes, it is compatible with the Canon Rebel XSi.