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> MRE 130
The MRE 130 mono amplifiers are push-pull power amps in pentode configuration, producing approximately 140W per channel at 2% THD. The MRE 130 monos are designed to reproduce the vast scale of a large orchestra in its entirety. From the deepest bass, to the highest note- all the musical information is conveyed without loss of dynamic details. Raw emotion, stunning detail and rich voices - the MRE delivers fireworks. There are power amps on the market which can’t run because of the power they have, whereas the MRE 130 can sprint. The sum of all its sonic characteristics makes the MRE 130 a suitable partner even for the exalted Jubilee preamp.
OCTAVE power amplifiers have always set new standards. With the introduction of the original RE 280 stereo power amplifier, Andreas Hofmann left traditional power amp technologies far behind. With the MRE 130, Hofmann has gone one step further. While it has the same power management and optimized input stage as its stereo brother, the MRE 130 benefits from an innovative and enhanced output stage configuration. What is revolutionary about this new generation of amplifiers is that OCTAVE has employed the classic, yet almost forgotten, pentode configuration.
The classic pentode configuration was quite commonly used in earlier power amplifiers. It offered the benefits of reliability and a relatively high power output. From a modern perspective, its disadvantage was reduced dynamic stability and a high level of distortion. These effects are not a direct result of the pentode itself, but rather of the circuitry employed at the time. Andreas Hofmann has now developed a new circuit design that eliminates the drawbacks of the classic pentode configuration. This novel design involves the use of a second, separate power supply circuit for the auxiliary current required for the pentode mode of operation. The characteristics of this enhanced pentode circuit employed in the MRE 130 are virtually ideal from both a sound quality and an engineering point of view.
Black Box Connector
OCTAVE, with the Black Box technology, offers an upgrade path for optimizing the OCTAVE amplifier in respect to the speaker. This flexibility is a unique feature of the OCTAVE brand.
The dynamic and tonal stability of an amplifier is strongly dependent upon the stability and capacity of the power supply, therefore the Black Box and Super Black Box were developed as external upgrades to the OCTAVE amplifiers’ power supply storage capacitors by increasing their capacitance by a factor of 4 (Black Box) or 10 (Super Black Box), respectively. This is a tremendous benefit if the speaker is difficult to drive. Loudspeaker efficiency is made less critical, while the amplifier is enabled to handle speakers with extremely low minimum impedances.
BIAS Adjustment
The Output stage of the MRE 130 operates in Class A/B, and therefore requires an adjustable BIAS regulation. The highly sophisticated yet extremely simple yet accurate BIAS calibration system is accessed on the front panel of the unit. It utilizes external precision bias trim pots and LED confirmation, allowing the user to readily monitor the output tubes and simply correct their bias individually at the top panel - without the need of a micrometer let alone any special knowledge or tools.
The correct BIAS is vital for the constant sound quality of the MRE 130. Due to this facility there is no need for a technician to service the MRE 130 for changing or tubes or to check their condition. The precision of this user friendly system is within 0.5% accuracy.
Power Management and Protection System
The MRE 130 is equipped with a multi-stage Soft-Start/Turn-On protection circuit which extends component as well as tube life considerably by protecting against stress caused by typical high inrush currents during switch-on. The unit starts in a defined sequence, with the Protection System monitoring the MRE 130 completely, and activated whenever a malfunction is detected. Once the Protection is activated, the MRE 130 is powered down.
Tube Complement : 4 x 6550 or optional KT88 each Amplifier
Design : Aluminium silver or Aluminium black
Add On Modules : Black-Box and Super Black Box
Power Output : 130 Watt into 4 Ohm
Frequency Response : 10 Hz - 80 kHz / ± 0,5 dB
Total Harmonic Distortion : < 0,1% at 10 Watt into 4 Ohm
Signal-to-Noise Ratio : > 100 dB
Minimum Speaker Impedance : 2 Ohm
Gain/Input Sensitivity : + 30 dB / 1 V
Connections
1 x RCA
1 x XLR Input
Features : Bias Adjustment, Power Management
General Facts
Power Consumption : 160 Watt idle, 320 Watt at full power
Standard Accessory : Power cord, 3 mm Screwdriverr for BIAS Adjustment, 1 sparetube KT88/6550
Weight : 22,7 kg each Amplifier
Formats
CD Formats : Red Book
Audio Formats : WAV, AIFF, FLAC, ALAC, OGG Vorbis, AAC, Windows Media-formatted content files, MP3
Internet Radio Provider : vTuner
Disc Compatability : CD, CD-R, CD-RW
User Control
Front Panel : Touch-sensitive eject and shutdown mode function
TV Monitor : 4:3 and 16:9 customisable TV interface USB touch screen compatible
Web Interface : PC and Mac internet browser compatible Adobe Flash user interface
AMX Creston : Installer-customisable reference apps available
Handheld : User interface app for iPhone and iPod Touch devices
Streaming and Ripping
USB : Scan and play from FAT and NTFS formatted memory sticks
Network Shares : Scan and play from music stored on a network share
Network Storage : Rip to external network storage for expanded music storage
CD Metadata : AllMusic.com online, FreeDB online and local database
StreamNet : 6 user streams to NaimNet and NetStreams systems
Power
Supply Voltage : 100V-230V; 50 or 60Hz
Dimensions (HxWxD) : 87 x 207 x 314 mm
Weight : 4.2 kg
Supplied with : External power supply
Formats
CD Formats Red Book
Disc Compatability CD, CD-R
User Control
Front Panel Seven button matrix
Handheld R-Com
Power
Power Supply Options 555PS, 2 x 555PS
Upgrades
Power Supply 555 PS
Other NAC 252, 552 PS, NAP 500, 500 PS
Dimensions (HxWxD) 114 x 432 x 314 mm
Weight 20.2 kg
Supplied with Hi-Line, R-Com, Burndy x 2, Remote Control NARCOM 4, Clamp 6
