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Aries Cerat

Aries Cerat Concero 65 LE Mono Power Amp

Aries Cerat Concero 65 LE Mono Power Amp

Regular price £85,000.00
Regular price Sale price £85,000.00
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The Concero 65 Limited Edition is the ultimate version in our 3 level Concero 65 series

The Concero 65 Series

The Concero 65 monoblock power amplifier series come in 3 versions, the Reference, the Signature and the highest level – the Limited Edition.

The Concero 65 Reference and Concero 65 Signature are both smaller versions of the Exsequor monoblock power amplifier, which is our top level 814 driving 813 circuit topology.

The Concero 65 Limited Edition is a different breed, and descends from our Legend Series Achilleas amplifier, based on our 813 driving 813 circuit topology. The Limited Edition version uses the same 813 directly heated triode on both the driver and the output stage, thus being a ‘one type’ tube amplifier.

The 813 Tube

The Concero 65 Limited Edition uses a parallel pair of RCA 813 tubes in the output stage, with a further 813 a the driver stage. So 813 driving an 813 topology. As an output tube, we believe this tube is one of the most linear tubes ever built. Triode curves quality are unmatched even by the most linear 300B tubes for example. And of course most bigger triodes like the 833 are far behind in both linearity and sonic performance.

This 813 big bottle tube never seizes to impress us whenever we compare it in our labs with ANY power tube used today, and is our weapon of choice when designing SOTA SET amplifiers.

Driver Stage

The driver stage is housed in a separate chassis, and has it’s own massive tube rectified power supply units and special biasing circuits. The driver stage is built like a small SET amplifier driving the output stage, and uses a unique interstage transformer. An example of the driver’s capabilities is the fact it can deliver 18W of power if needed.

Output Stage

The output stage is driven in absolute fidelity to the input signal. Having the same type of tube in the driver stage as in the output stage, and using a carefully designed biasing scheme, we can use what is called harmonic distortion cancelling. This occurs in special cases where a cascade of tube stages using the same tube type are used.

Filament Supplies

All three Directly heated triodes, both output and driver, are using triple PI filters with a total capacitance of 700,000uF, providing a completely ripple and noise free filament current. In the Concero 65 Limited Edition all filaments are inductively isolated from their power supply units.

As in all circuits using directly heated triodes, the filament power supply units are part of the signal circuit. This in turn means filament current supply is critical to the end sonic result. Having a very low noise PSU is mandatory. In the Concero 65 Limited Edition we took the extra step of isolated the PSU from the signal using specially designed inductors.

Driver & Output PSUs

All PSUs in the Concero 65 Limited Edition are independent using their own transformers,chokes and our proprietary Super Capacitors. The driver stage power supply unit is tube rectified, and uses a pair of high current damper tubes.

As energy storage we use our unique Super Capacitors. This unique type of film capacitors present a set of specifications unprecedented in capacitors used in audio, such as ESR and ESL values 100 times lower than electrolytics, as well as a maximum current surge measured in kiloamperes.


Both driver and output stage bias can be monitored and set/adjusted on the fly, with the use on the built in digital monitors, paired with biasing adjusting knobs. Users can adjust the bias on the fly even while music in playing! This is a highly flexible feature and the sonics can be tweaked based on the settings.



Output Power:



x3 (9.5db)

Noise floor:

<105db (Ref) un-weighted

Tube list:

3 x 813 (per channel)


-75db H2 @ 1W -55db H2 @10W

Signal bandwidth:

8Hz-110KHz @80% max power

Energy storage:


Power supply:

1,800VA power transformer


RCA, AC link proprietary input

Output impedance:

User selectable (impedance matching system)
1.6ohm (8ohm setting), 0.8ohm (4ohm), 0.4ohm (2ohm setting)

Tube Bias:

Adjustable bias on the fly

User readouts:

Output and driver online monitors


No capacitors in the signal path.
SuperCapacitors used for output and driver power supply
(1mohm ESR capacitors)

Power Consumption:

500W per channel


510mm W x 590mm D x 560mm H (2 chassis stacked)


165kg per channel

Book a Demo

Book a Demo:

Aries Cerat Concero 65 LE Mono Power Amp
Aries Cerat Concero 65 LE Mono Power Amp

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Aries Cerat Concero 65 LE Mono Power Amp
Aries Cerat Concero 65 LE Mono Power Amp



Delivery & Returns

Delivery & Returns

We offer FREE delivery to the mainland UK (excluding Channel Islands, Isle of Man, Isle of White, Isles of Scilly, and some of the remote Scottish Isles).

For other areas please contact us for a quote. Select items can be delivered internationally by prior agreement. Again please contact us for a quote. We will always do our best to help.

Our aim is to dispatch goods within 2 working days of an order being placed. Please allow 5 working days from the time of your order to receipt of item. If an order is expected to take longer than this our order fulfillment department will contact you to inform you of this.

Where multiple items are ordered, we will dispatch them all in one package. If you have ordered any special or customized items, or items otherwise not immediately available, we will dispatch the order when all items are available. If you have any concerns regarding this, please contact us and we will do are very best to help you.