Rotel RB-1590 Stereo Amplifier, 2 x 350 Watts

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The RB-1590 is at the top of its class as a 2 x 350 Watts stereo amplifier with dual toroidal transformers and special slit foil capacitors.

This unit looks and tests like new. It will come with the manual and power cord.

Features:

• 2 x 350 Watts of robust power
• Class AB amplifier design
• Massive power supply using Dual Toroidal Transformers
• High quality slit foil capacitors made in Britain
• Balanced XLR inputs

More from Rotel:

Power - refined, detailed, and plenty of it. Rotel’s new Class AB stereo power amplifier is rated at 350 Watts per channel into 8 ohms both channels driven. That is a lot of power, but larger listening rooms or less sensitive loudspeaker designs require it to bring out the best possible performance and attain realistic audio dynamics.

The impressive capabilities of this amplifier begin with a solid foundation consisting of twin massive toroidal transformers custom made by Rotel. These transformers are just part of a rock-solid power supply that includes eight special British made BHC capacitors, known for their low loss and quick response times. These components will continue to supply all of the voltage and current requirements needed, even under the most difficult load conditions.

But power unrefined has never been a Rotel design goal. Every aspect of circuit design has been carefully considered and each component has been rigorously selected after extensive listening sessions. The circuit topography has been laid out in a true monoblock design, ensuring maximum signal separation and improved stereo imaging.

Features include: XLR Balanced and RCA input connections, two pair of 5-way speaker binding posts, 12-volt trigger control, thermal protection circuitry, overcurrent, over-voltage protection circuitry, dual staged power on relay to reduce surge current and extend longevity, and a detachable IEC power cord all in a 5U chassis with included rack ears.

The RB-1590 has been designed for the most discerning audio enthusiast and will provide the highest levels of audio performance.

Click below to add our recommended matching cables from Kimber Kable, all brand new as SkyFi is an official Kimber dealer.

Kimber Kable - RCA Interconnects - Better

Kimber Kable - RCA Interconnects - Best

Kimber Kable - BALANCED XLR Connectors - Better

Kimber Kable - BALANCED XLR Connectors - Best

Kimber Kable - Speaker Cables - Better

Kimber Summit Series Monocle XL Speaker Cables (PAIR) - Best

Kimber Summit Series BiFocal XL Bi-Wire Speaker Cables (PAIR) - Best If Applicable 

Kimber Kable - Power Cords - Better

The SkyFi Testing Process for Solid State Amplifiers:

We start with a visual inspection of all internal components to make sure that there are no signs of heat stress or damage. Capacitors are checked for telltale signs of predictive failure including bulging, shrunken wrappers, or physical leakage. We also inspect the PCBs for discoloration from resistors or transistors that may have been running hot. On vintage units we often spot check select capacitors for value and ESR.

If the amplifier passes visual inspection, we move on to a controlled power on sequence using a Sencore safety analyzer to monitor current draw in real time. Once the amplifier is determined to be safe to operate, we connect it to full AC mains for function and power testing. We connect the speaker outputs of the amplifier to a Sencore PA81 Power Analyzer which acts as a dummy load, DC offset monitor, and oscilloscope interface. We start with a low level 1KHz test signal at the amplifier’s input and slowly increase its amplitude while monitoring the output on an oscilloscope for signs of noise, clipping, distortion, or improper channel balance. We continue increasing the signal level until the amplifier reaches clipping. At this point we take an output power measurement and compare it to the spec sheet of the amplifier to verify proper performance. If the device under test has both balanced and single ended inputs they are both tested at this time. We finish off the bench evaluation with a 1KHz square wave check and a 20Hz to 20KHz sine sweep to assess the amplifier’s frequency response characteristics. This battery of tests will usually reveal if the amplifier has any issues that need further attention.

Before the device leaves the bench, we perform a listening test with actual music using a variety of preferred test tracks. Our benches are outfitted with familiar monitor speakers which help us identify inconsistencies that will not always show up on our test gear. The main things that we are listening for are hum or noise with no signal present, proper center image, clicks, pops, or any other obvious undesirable audio characteristics.

If the unit passes all of these tests it is moved to our long term testing rig where we simulate real word operating conditions for 6-8 hours. This allows us to monitor the unit for signs of thermal runaway or intermittent issues that only crop up when the unit has fully come up to temperature.

Specifications:

DIMENSIONS (W × H × D)

431 × 237 × 454mm

17" × 9.75" × 17.9"

FRONT PANEL HEIGHT

5U / 221mm (8.75")

POWER REQUIREMENTS

120V, 60Hz

POWER CONSUMPTION

800W

STANDBY POWER CONSUMPTION

0.5W

NET WEIGHT

38.1kg (84lbs.)

BTU RATING (4Ω, 1/8th power)

2100 BTU/h

CONTINUOUS POWER OUTPUT

350W/Ch (All channels driven, 8Ω)

TOTAL HARMONIC DISTORTION (THD)

(20Hz–20kHz) <0.03%

FREQUENCY RESPONSE

10Hz - 100kHz ±0.5dB

S/N RATIO (IHF "A" Weighted)

120dB

GAIN

RCA: 27.5dB

XLR: 23.5dB

INTERMODULATION DISTORTION (60Hz:7kHz, 4:1)

<0.03%

DAMPING FACTOR

300

SPEAKER IMPEDANCE

4Ω minimum

INPUT SENSITIVITY

Line Level Inputs (RCA): 2.2V

Line Level Inputs (XLR): 3.5V

INPUT IMPEDANCE

Line Level Inputs (RCA): 12kΩ

Line Level Inputs (XLR): 100kΩ

CHANNEL SEPARATION

>50dB

Resources:

Manual

Info Sheet

Dimensional Drawing