Aries Cerat · Power Amplifiers
Concero 65 Signature
A colossal dual-chassis single-ended triode monoblock built without compromise.
While the Concero 65 Reference broke ground by mating the purity of a single-ended triode with the authority of an 813 parallel output stage, the Signature model scales this topology to an unprecedented level. Occupying two massive chassis per channel, it fundamentally isolates the critical amplification stages from the monumental forces of the power supply.
This dedicated architecture unlocks the full potential of the 814 driver and 813 output tubes. The energy storage reserves have been increased to a staggering 3,000 joules, managed by custom film SuperCapacitors. Furthermore, the sensitive filament power supplies are now inductively isolated from the signal path via bespoke inductors, plummeting the noise floor to virtually unmeasurable levels.
The sonic result is an amplifier of profound contradictions. It retains the delicate, holographic midrange and timbral beauty intrinsic to the very best single-ended designs, yet it wields an iron grip over the loudspeaker. With its exceptionally quiet background and limitless headroom, the Signature renders explosive dynamic swings and subterranean bass detail with startling speed and crystalline clarity.
Key Features
01
Dual-Chassis Architecture
The amplifier is separated into two stacked chassis per channel, providing supreme mechanical and electrical isolation between the monumental power supply and the delicate audio circuits.
02
Parallel 813 Output Stage
A parallel pair of RCA 813 transmission tubes operates in absolute linearity, delivering 65 watts of pure Class A power with a dynamic scale that eclipses standard audio triodes.
03
Inductively Isolated Filaments
The sensitive directly heated triode filaments are isolated from the power supply using specially designed inductors, plunging the noise floor below -105 decibels.
04
Dedicated 814 Driver Stage
An independent 14-watt single-ended driver stage built around the RCA 814 pentode ensures the massive output section is driven with perfect fidelity and immense bandwidth.
05
Capacitor-Free Signal Path
Signal transfer is managed entirely by bespoke, wide-bandwidth inter-stage and output transformers, completely eliminating signal-degrading capacitors from the audio chain.
Chapter 01
The Signature Elevation
While the Concero 65 Reference pushed the boundaries of single-chassis amplification, the Signature model was conceived to remove the final mechanical and electrical compromises. By separating the circuitry into two stacked chassis per channel, Aries Cerat provides absolute isolation for the highly sensitive audio stages. This division allows for an even larger power supply, expanding the energy reserves to a massive 3,000 joules and ensuring unparalleled dynamic stability.
Chapter 02
Inductively Isolated Power
In a directly heated triode circuit, the filament power supply is an integral part of the signal path. Even infinitesimal noise introduced here is amplified by the subsequent stages. The Concero 65 Signature addresses this by using triple PI filters with 700,000 microfarads of capacitance, and critically, isolating the power supply from the signal using bespoke inductors. This dedicated separation results in a noise floor below -105 decibels, creating a vanishingly quiet background.
Driving the parallel 813 output tubes is an independent, 14-watt single-ended stage built around the RCA 814 pentode. Because the driver and output stages utilise proprietary film SuperCapacitors rather than standard electrolytics, they benefit from an equivalent series resistance that is a hundred times lower, facilitating near-instantaneous current delivery.
Chapter 03
Sonic Signature
The Concero 65 Signature bridges the historical divide between the emotive purity of a single-ended triode and the sheer force of high-current solid-state designs. It delivers the liquidity, spatial dimensionality, and harmonic richness expected from an elite SET amplifier, completely free from grain or artificial edge.
Yet, it commands the loudspeaker with fearsome authority. The immense energy reserves and total lack of coupling capacitors result in bass that is deeply textured and firmly controlled, whilst the highest frequencies extend with effortless clarity. It is a profoundly revealing instrument, capable of rendering the most delicate acoustic nuances and sweeping dynamic shifts with equal composure.
Specifications
Output Power65W
Gainx2.7 (8.5db)
Noise floor<105db (Ref) un-weighted
Tube list1 x 814, 2 x 813 (per channel)
Distortion-70db H2 @ 1W -50db H2 @10W
Signal bandwidth10Hz-110KHz @80% max power
Energy storage3000j
Power supply1,800VA power transformer
InputsRCA, AC link proprietary input
Output impedanceUser selectable (impedance matching system) 1.6ohm (8ohm setting), 0.8ohm (4ohm), 0.4ohm (2ohm setting)
Tube BiasAdjustable bias on the fly
User readoutsOutput and driver online monitors
CapacitorsNo capacitors in the signal path. SuperCapacitors used for output and driver power supply. (1mohm ESR capacitors)
Power Consumption450W per channel
Dimensions510mm W x 590mm D x 560mm H (2 chassis stacked)
Weight150kg per channel