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Aries Cerat
Aries Cerat Exsequor Reference MKII Mono Power Amp (Pair)
Aries Cerat Exsequor Reference MKII Mono Power Amp (Pair)
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Description
The original Exsequor amplifier was one of our very first commercial design, and one of our proudest moments
The Exsequor Reference MKII
Working in Class A1, the Exsequor amplifier can deliver more than 65W in 8ohm or 4ohm loads. With it’s unsurpassed clarity, 3D imaging and breathtaking transients, with enough power to drive almost any floorstanding speaker, this SET amplifier is a class of it’s own.
We believe that SE non feedback amplification stages deliver the best overall sonic performance to the listener. Yet, almost all SET amplifiers do not have sufficient power to drive the majority of modern loudspeakers. One way of delivering enough power from a SET amplifier, is the use of many parallel mainstream tubes like KT-88, EL34 or big bottle tubes like 845 and the 805. Direct heated triodes with their super smooth sound are the way to go.
The 813 Tube
The tube of our choice is the 813, a 50W thoriated Tungsten filament tube with it’s 125W plate dissipation rating and probably the best big bottle tube sound we have ever tried in our labs, leaving far behind any version of 845 and 300B tubes. Almost all tube amplifier manufacturers with their light, slow and weak power supplies give a distinct flabby sound to the majority of these amps.
They get things worst by trying to drive the big output valve with small signal tube like 12AXXs e.t.c. As a result, the output tube, is under driven with the known results of limited frequency response and lack of acceptable transient response..
We chose to differ… the Exsequor monoblock tube amplifier is our opinion of how a SET amplifier without compromises should sound and how tube amplification should be implemented.
Driver Stage
Most SET amplifiers, use a small signal tube, usually RC coupled to the output stage. As a result, the final stage is well under-driven, compromising the sonic performance, giving the SET amplifiers their usual distinctive mellow sound. In order to drive a pair of big tubes with large grid capacitance the driver stage must be a small amp by itself.
We decided to build an amplifier inside an amplifier, so the output stage is driven without any compromise. Using the 814 tube, a Direct Heated Thoriated Tungsten tube, we are capable of delivering >14W in class A operation to the grid of the 813s, more power than many SET amplifiers deliver as their output.
Power from the driver tube is delivered to the 813 tubes by an amorphous double-c core, bifilar winded inter-stage transformer with exceptionally wide bandwidth and low distortion.
The driver stage and filament power supplies are located on the bottom chassis.The 814 driver stage PSU is dual tube rectified, triple choke filtered using low DRC chokes and using our SuperFilmCapacitors.
All three tube filament supplies are triple filtered using passive DC filters,and are inductively isolated from the signal path.
Output Stage
The output stage power supplies are located on the main chassis. It uses a tube bridge rectifier using the 6cj3 very high current , and extremely robust and quiet dumper diodes. We also use oil/film capacitors and our Super Film Capacitors.
Each of the monoblocks has an internal mains power filter, independent for each chassis /channel. Our dual filter for each channel makes the use of randon main power filters redundant.
Biasing
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.
Specifications
Specifications
Product Specifications
| Feature | Specification |
|---|---|
| Output Power | 65W (A1) |
| Gain | x3 (9.5db) |
| Noise floor | <100db (Ref) unweighted |
| Tube list | 2 x 813, 1 x 814 (per channel) |
| Distortion | -75db H2 @ 1W -55db H2 @10W |
| Signal bandwidth | 8Hz-110KHz @80% max power |
| Energy storage | 3000j |
| Power supply | 1,800VA power transformer |
| Inputs | 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 |
| Capacitors | No capacitors in the signal path. SuperCapacitors used for output and driver power supply (1mohm ESR capacitors) |
| Power Consumption (idle) | 520W per channel |
| Dimensions | 610mm W x 590mm D x 525mm H (2 chassis stacked) |
| Weight | 170kg per channel |
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Aries Cerat Exsequor Reference MKII Mono Power Amp (Pair)
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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.