Superb Four-Channel Power Amp for Home Theater, Distributed Audio, and More
The RMB-1504 Class AB four-channel amplifier delivers on the ongoing commitment of performance without compromise, building on over 55 years of Rotel amplifier design and in-house manufacturing of hi-fi electronics. Discrete output devices, a massive power supply with toroidal transformer, premium components, and RotelÂ’s Balanced Design ensure superb sound quality. High current capability allows the RMB-1504 to drive difficult speaker loads with ease.
The four-channel RMB-1504 delivers 70 watts-per-channel into 8 ohms and 115 watts into 4 ohm loads. You'll find many uses for this capable and versatile component. It can provide power and refinement for object-based overhead speakers in home theater installations and also supplies the demanding drive required for custom installation and multi-room audio solutions.
Effortless Power Delivery
Rotel prides itself on the muscle and performance of its power amps, and the RMB-1504 will exceed your expectations on both counts. An oversized factory-built toroidal transformer and high efficiency capacitors drive an array of high current output transistors ensuring fast transient timing, accurate detail and controlled consistency of low frequency regardless of the loudspeakers load rating or cable run distance. Maintaining crucial timing and energy while delivering effortless power is a signature trait of this amplifier providing increased speaker placement options.
Critical evaluation of the circuit design and meticulous selection of each acoustic audio components ensures accuracy, power and efficiency all coupled with an unsurpassed build quality ensuring this amplifier proudly wears the Rotel name.
Simple Operation and Convenience Features
No matter how you choose to use the RMB-1504, you will appreciate its simple operation and convenience features. The 12-volt trigger input and output connections, user selected audio signal sense power control, front panel volume attenuators, audio output link connections, five-way speaker binding posts, and available rack mount kit provides ultimate installation flexibility.
Auto Turn On/Off Mode Selector
The RMB-1504 provides three different options for manual or automatic power on/off operation. These modes are selectable using a three-position slide switch on the back panel.
With the switch in the OFF position, the amplifier is turned on or off manually using the front panel power switch. Also use this mode if you are using a switched AC outlet to control power to the amplifier.
With the switch in the SIGNAL SENSE position, the amplifier turns on automatically when a signal is detected at the inputs. The amplifier will go into standby mode several minutes after a signal is no longer present. The front panel power switch overrides this function. It must be ON for the signal sensing to work. Turning the switch OFF cuts power to the amplifier, regardless of whether or not a signal is present.
With the switch in the 12V TRIG position, the amplifier is turned on automatically when a 12 volt trigger signal is present at the 12V TRIG input to the left of the switch. The amplifier goes into standby mode if the +12 volt signal is not present. The front panel POWER SWITCH overrides this function. It must be ON for the +12V trigger to work. Turning the switch OFF cuts power to the amplifier, regardless of whether or not a trigger signal is present.
Thermal and Over-Current Protection Circuits
The RMB-1504 features thermal and over-current protection circuits that protect against potential damage in the event of extreme or faulty operating conditions. Unlike many designs, these protection circuits are independent of the audio signal and have no impact on sonic performance. Instead, the protection circuits monitor the temperature of the output devices and the current they are handling and shut down the amplifier if operating conditions exceed safe limits.
Most likely, you will never see this protection circuitry in action. However, should a faulty condition arise, the amplifier will stop playing and the LED indicator on the front panel will light up.
Music Everywhere
Whole house audio brings the soothing, inspiring and energizing power of music to every room in your home as you desireÂ… including outside on the patio or by the pool.
Quality amplification makes your speakers sing whether they are discreet in-wall or in-ceiling models, or larger floor standing designs that occupy a place of pride in your listening room. In fact, amplifiers are the critical component in distributed music systems as they are tasked with delivering the music signal over often very long runs of speaker wire.
Too many whole house systems make sound everywhere, but music nowhere. Award winning Rotel amplifier designs are available in different channel configurations, some with digital inputs for today’s streaming media devices, to fit any system configuration. Smart signal sensing means they turn on exactly when you want them to – when the music starts!
