Telos

Amplifiers


Mono Block Power Amplifiers


Thrax: Heros Monoblock

100 Watt Pure Class A Mono Block Amplifier

Fully Balanced Differential operation amplifier. Power of a solid state with tube amplifier architecture using simplest signal path. Transformer coupled input and output with JFET/MOSFET cascode output devices. Microprocessor control 100W Class A power.

Almost double the efficiency of a normal Solid State Class A design, no DC on output and many other benefits are taken advantage of in our implementation. A fully differential architecture using an input phase splitting transformer and summing back at the push pull output transformer.

Heros is a two stage hybrid transformer loaded amplifier with latest technology coupled with an output transformer of superb quality.

Features
• Tube amplifier architecture with simplest signal path
• Transformer coupled input and output
• JFET/MOSFET cascode output devices
• Silicon Crbide diodes in power supply
• Microprocessor control
• Selectable gain
• Selectable speaker impedance
• Audiophile 5687wa tube used
• Fully balanced differential operation
• Both RCA and XLR inputs
• Compact chassis built like a tank
• 100W Class A power

Based on a standard cathode follower push pull output stage but modified with our design concepts and experience it features a tube input stage providing the necessary voltage amplification. Followed by transformer loaded cascoded jfet/mosfet output stage instead of the usual tube taking care of current gain much better.

Almost double the efficiency of a normal Solid State Class A design, no DC on output and many other benefits are taken advantage of in our implementation. A fully differential architecture using an input phase splitting transformer and summing back at the push pull output transformer.

This solution completely floats the inside of the amplifier isolating it from any external influences.
The design being fully differential is immune to power supply noise.

The power supply for the output stage uses a new breed of rectifier diodes made of a new material called Silicon Carbide. They have no reverse current and switching losses.

When properly applied the rectifier produces no EMI/RFI in the chassis. The result is an amplifier free of grain and frizziness, giving
new meaning to transparency and tone.

We use the well known 5687WA audiophile tube and the highest grade audio transformers.

The whole chassis is a heatsink. It is the most compact 100 watt class A solid state amplifier available.

Operating all devices in class ‘A’ produces a fair amount of heat. The chassis is designed to cope with the heat produced by the components and provide a vibration free structure to house the components.

All the electronics are enclosed in separate compartments to stop interference between components.

Blending this with stylish aesthetics produced a beautiful sculpture - To be known as Heros.

Specifications:

• Inputs
- 1 unbalanced RCA connector
- 1 balanced XLR connector
• Output ……………….................................................…................ 100W in 4Ω/8Ω
• Power supply ……………….....................................................…….. 115 or 230 V
• Power consumption ……………..........................................................…….. 230W
• Dimensions ………………...................................…….. 210W x 400D x 230H mm
• Weight ………………............................................................................…….. 30Kg
• Finish ……..........................................…….. Black or Silver anodized aluminum
• Tube compliment :
- 1x 5687 amplification

Heros is a very unusual two stage hybrid transformer loaded amplifier marrying old concepts with latest technology.

The numerous benefits from using an output transformer are usually ignored mostly due to cost reasons. Yet when done correctly the result speaks for itself.

Open transparent sound with no edginess or hardness in the presentation. Compact form factor belies the 100W Pure Class A delivery.

Pure Class A operation is still our favoured design methodology from both a technical and sonic perspective. These amps are built like jewel boxes. Superb craftsmanship and design. Inside and out. No compromises in the materials or the build.

They drive complex loads, and let the music flow effortlessly. A must listen!



Ypsilon: SET-100 Ultimate

Single Ended 100Watt Class A

SET 100 Ultimate is a 120W single-ended class A hybrid amplifier.

It has the magic midrange of a small S.E.T amplifier with the scale, authority, macro and micro detail that no amplifier has ever achieved until now. It uses a specially designed s-e mosfet output stage direct coupled at the output using as the dc current path a double c-core amorphous choke.

SET 100 has power and drive with transparency, musical involvement and abo

With only 2 gain stages in the signal path, the level of immediacy, transparency is unequaled by designs using more than 2 gain stages. Having no overall feedback, the distortion is kept comparably low while the output impedance is sufficient enough to drive real world loudspeakers.

The first stage uses a high transconductance triode, the SIEMENS C3g selected for its sonic capabilities and reliability. It is powered by a separate power supply with tube rectification and choke regulation. This stage is transformer coupled with the output stage. This interstage transformer is a state of the art component. It uses a proprietary double c- core material and optimized unique winding design. Sonically it is a virtually nonexistent component.

The output stage and all internal wiring are hard wired with silver wire extruded to our specifications. SET 100 is an amplifier that produces music in its true natural scale, but above all it brings you as close as possible to the music event, to feel the music rather than hear it, to be touched and overwhelmed by the deeper feeling, with music emerging and not only sounding in a clear undistorted way. Compared with conventional amplifiers it is more direct sounding, musical, with more instrument body , lower frequency extension, frightening dynamics and most of all magically three dimensional.

The power supply is designed as a system paying attention to every smallest detail that could affect the sound quality. It uses a low noise E-I power transformer, a big size power supply choke and 4 pole electrolytic capacitors. It is also hard wired with silver wire.

Mechanical, magnetic and electrical noise is very low contributing to the quiet operation of the system. A darker background is produced from which sounds suddenly emerge, like from real life.

SPECIFICATIONS SET 100 ULTIMATE

SUPPLY VOLTAGE 230 V ac / 115 V ac
MAINS frequency 50 Hz-60Hz
POWER CONSUMPTION 400W constantly
OUTPUT POWER BEFORE CLIPPING 120W rms @ 8 ohm
130W rms @ 5,6 ohm
100W rms  @4 ohm
BANDWIDTH 5Hz -80Khz  -3db
OUTPUT IMPEDANCE 0,22 ohm
INPUT IMPEDANCE 47 Kohm
GAIN X30  (29,5 db)
DIMENSIONS 240x610x672  (W x H x D)mm
WEIGHT 100 Kgr

Truly an Ultimate performer. Few amplifiers can come close to the balance and transparency this amplifier can deliver. We have driven "crazy" speakers such as Apogee Scintilla 0.78Ohm loads and sat in astonishment.

Driving Wilson Alexandra XLF's and you will find out why Wilson owners are arriving at the conclusion these amplifiers are the best they have heard.

On Kaiser Kawero's these amps have had listeners come back 2 years later and say they can't get the sound out of their heads.

Walk in listeners at the show have placed orders on the spot.

Why? It aint subtle. Single Ended purity and power to match. Others claim they have merged the two opposing directives. When you listen to the Ypsilon SET 100 you know you have acheived "Telos".

Absolute Sound Magazine Golden Ear Award winner



Ypsilon: Aelius

200W Power Amplifier

Outputting 200W into 8 ohms, 380W into 4 ohms, or 500W into 2 ohms, with the first 60W in pure class-A the Aelius is a push-pull hybrid monoblock power amplifier using two gain stages with no overall feedback.

The first gain stage uses a tube in single-ended class A operation, transformer coupled to the output stage. It is unusual practice to implement an inter-stage transformer in a solid state or even hybrid amplifier. With the transformer two tasks are achieved. Perfect phase splitting and low impedance drive. Thus no need to use an additional intermediate amplifying stage, so

The Aelius has only two gain stages and almost no passive components in the signal path. The single-ended class-A tubed input stage uses a single C3g pentode tube (rectification for this stage is supplied by another tube) transformer-coupled to the push-pull output stage of six matched pairs of N-channel polarity MOSFETs.

There are no source resistors in the circuit. Electrical engineer Demetris Backlavas designed a special transformer for this purpose with a very wide bandwidth of 10-70 KHz. The bandwidth of the transformer defines also that of the amplifier.

The output stage uses components of the same polarity (N-channel), working in the same topology. The power supply for each side is floating in respect to the ground using power supply chokes for smooth filtering.

An interstage transformer is unusual in a solid-state or hybrid amplifier and is used here as a "perfect" phase splitter for the Aelius's push-pull operation, and as a step-down transformer to greatly lower the input tube's impedance to drive the capacitance of the output MOSFETs.

Though the phase is split and the amp is push-pull, it's really two single-ended amplifiers with six transistors driving the plus and a further six driving the minus terminal to create a very unique circuit.

Without the transformer, an additional one or two active stages would be needed to split the phase and lower the impedance and that those additional stages would reduce the amp's notable transparency and signal purity. Building quality transformers is Ypsilon's speciality and in this case a sufficiently wide bandwidth (10Hz–70kHz) transformer was necessary as the transformer's bandwidth defines the amplifier's bandwidth.

Backlavas says that while the Aelius's circuit is in some ways similar to the Circlotron configuration used in some output-transformerless (OTL) tube amps, it is not a true Circlotron. Unlike the Circlotron's unity-gain output, the Aelius's output is greater than unity gain. The result is an amplifier with the sonic purity of a single-ended design, with push-pull power sufficient to drive virtually any loudspeaker.

The output stage is self-stable, eliminating the need to use servo circuits for adjusting dc offset.

Both outputs ,plus and minus carry signal in opposite phase.

Aelius is most certainly a revolutionary product…….

SPECIFICATIONS AELIUS

OUTPUT POWER BEFORE CLIPPING 200W rms @ 8 ohm
350W rms  @4 ohm
BANDWIDTH 11Hz -75Khz  -3db 
OUTPUT IMPEDANCE 0,4 ohm 
INPUT IMPEDANCE 47 Kohm 
GAIN X30 (29,5db)
INPUTS Balanced/Unbalanced switchable 
POWER CONSUMPTION 250W @ idle 
DIMENSIONS 425x425x230 (W x H x D)mm 
WEIGHT 45 Kgr (each)

The Aelius's is rhythmically correct and engaging and has a grip and control over the bottom end that is assertive. No clinical or harmonically bleached presentation.

The Aelius produces mesmerizing three-dimensional sonic holograms. The Aelius is very quiet and super-transparent, and its microdynamic performance is as good as it gets.

Michael Fremer Senior Editor of Stereophile magazone says "The Aelius is yet another spectacular sonic and technological achievement from Ypsilon Electronics. I remain impressed by everything they do."

The Aelius has been awarded a coveted Class A recommendation in Stereophile. It will hold its own against any of the competition in terms of power but clearly exceed expectations in musicality.

 

 

 



Analog Domain: The Apollo

4000W Solid State Power Amplifier

The Apollo is the most powerful member of the DX9 range. It is housed in our M4 chassis. Rated at 4,000W into 8 ohms and 8,000W into 4 ohms, the Apollo is one of the most powerful amplifiers ever built for home use, designed for precise amplification of audio signals in demanding installations.

The output stage features 100 high-performance audio-grade power transistors with a peak output current capacity of 720 amperes.

SPECIFICATIONS

Input sensitivity:         1.55 Vrms

Input impedance:       10 kohm

Voltage gain:   +41 dB or +26 dB, switch-selectable

Peak power output:    4kW/8ohm; 8kW/4ohm; 2ohm stable

Peak output voltage: 179 Vac, ±253 Vpp

Peak output current:   120 A

Frequency range:       1Hz–100kHz

Full-power bandwidth:           5Hz-25kHz

Minimum rated load:   4ohm

Damping factor:          > 1000

Output noise:   < 50uVrms

Dynamic range:           > 126 dB linear; > 132 dB A-weighted

THD+N:             < -92dB (0.0025%)

Mains voltage:             230/115Vac, factory pre-configured

Power draw:   200W idling; < 20W standby

Max current draw:      < 16A / 230V

Inputs:             XLR balanced, RCA unbalanced

Trigger voltage:           12V in, 12V out

Trigger input/output:   3.5mm jacks

Dimensions:    440(w) x 298(h) x 545(d), mm

Weight:            ~85kg, 115kg shipping

Rated at 4,000W into 8 ohms and 8,000W into 4 ohms, the Apollo is one of the most powerful amplifiers ever built for home use, designed for precise amplification of audio signals in demanding installations.

WTH??? Did someone just say 8000W into 4ohms ?????? . Got a pair of Bending Wave speakers or low efficiency dynamics? Then this is not out of the question.

The key is it's linear and not class-D. So the sound has finesse and none of the coldness associated with Class-D designs.

The output stage features 100 high-performance audio-grade power transistors with a peak output current capacity of 720 amperes.

The high power output of the Apollo makes it especially suitable for driving the subwoofer/LF channel in a high-performance split system.

Australia is looking at building a new submarine that has silent propulsion and is non-nuclear. I think we have a solution.......



Analog Domain: The Athene

2000W Solid State Power Amp

The Athene is rated at a peak power of 2,000W into 8 ohms and 4,000W into 4 ohms. It is housed in our M4 chassis and has the same high-current output stage as the Apollo.

The Athene can drive any channel in a high-performance split system.

The Athene is designed for precise full range amplification, capable of sustained high power output. The output stage features 100 high-performance audio-grade power transistors with a peak current capacity of 720 amperes.

SPECIFICATIONS

Input sensitivity:         1.55 Vrms

Input impedance:       10 kohm

Voltage gain:              +38 dB or +26 dB, switch-selectable

Peak power output:     2kW/8ohm; 4kW/4ohm; 2ohm stable

Peak output voltage:   126 Vac, ±179 Vpp

Peak output current:   120 A

Frequency range:       1Hz–100kHz

Full-power bandwidth: 5Hz-25kHz

Minimum rated load:   4ohm

Damping factor:          > 1000

Output noise:             < 40uVrms

Dynamic range:          > 126 dB linear; > 132 dB A-weighted

THD+N:                     < -92dB (0.0025%)

Mains voltage:           230/115Vac, factory pre-configured

Power draw:              200W idling; < 20W standby

Max current draw:      < 10A / 230V

Inputs:                       XLR balanced, RCA unbalanced

Trigger voltage:           12V in, 12V out

Trigger input/output:   3.5mm jacks

Dimensions:              440(w) x 298(h) x 545(d), mm

Weight:                    ~75kg, 105kg shipping

Power to the people! Or at least to those who need almost limitless power to drive low efficiency monsters. A grip and control that has to be heard to be believed. Amazing.

Real power figures too. We've seen resistive test loads glow white hot under brutal signal inputs designed to turn most amplifiers into boat anchors.

Authentic in every way.



Analog Domain: The Calysto

550W Mono Power Amplifier

The Calysto is designed for ultimate fidelity. It features a wider 'Class A' operating region in the output stage, providing exceptional resolution in the upper-midrange and high frequencies at low output power levels.

The Calysto is especially suited to driving the Mid/HF channel amplifier in a high-performance split system. Front panel design and footprint are compatible with the Apollo, Athene and Artemis, allowing amplifiers to be stacked.

SPECIFICATIONS

Input sensitivity: 1.55 Vrms
Input impedance: 10 kohm
Voltage gain: +32 dB or +26 dB, switch-selectable
Peak power output: 550W/8ohm; 1.1kW/4ohm; 2ohm stable
Peak output voltage: 67 Vac, ±95 Vpp
Peak output current: 70 A
Frequency range: 1Hz–100kHz
Full-power bandwidth: 5Hz-25kHz
Minimum rated load: 4ohm
Damping factor: > 1000
Output noise: < 35uVrms
Dynamic range: > 126 dB linear; > 132 dB A-weighted
THD+N: < -92dB (0.0025%)
Mains voltage: 230/115Vac, factory pre-configured
Power draw: 150W idling; < 20W standby
Max current draw: < 5A / 230V
Inputs: XLR balanced, RCA unbalanced
Trigger voltage: 12V in, 12V out
Trigger input/output: 3.5mm jacks
Dimensions: 440(w) x 254(h) x 545(d), mm
Weight: ~64kg, 75kg shipping

Impressive power and musicality from a master of high power design Angel Despotov. Made in Germany to exacting standards.



Analog Domain: The Artemis

1,000W into 8 ohms Mono Power Amplifier

The Artemis has a peak power rating of 1,000W into 8 ohms and 2,000W into 4 ohms, housed in our M2 chassis. Its footprint is the same as the M4 chassis, differing only in height.

The output stage of the Artemis features 52 high-performance audio-grade power transistors with a peak current capacity of 360 amperes.

The Artemis is designed for full range amplification or can be used as the Mid/HF channel amplifier in a high-performance split system. Front panel design is compatible with the Apollo and Athene, allowing amplifiers to be stacked.

SPECIFICATIONS

Input sensitivity: 1.55 Vrms
Input impedance: 10 kohm
Voltage gain: +35 dB or +26 dB, switch-selectable
Peak power output: 1kW/8ohm; 2kW/4ohm; 2ohm stable
Peak output voltage: 89 Vac, ±126 Vpp
Peak output current: 70 A
Frequency range: 1Hz–100kHz
Full-power bandwidth: 5Hz-25kHz
Minimum rated load: 4ohm
Damping factor: > 1000
Output noise: < 35uVrms
Dynamic range: > 126 dB linear; > 132 dB A-weighted
THD+N: < -92dB (0.0025%)
Mains voltage: 230/115Vac, factory pre-configured
Power draw: 150W idling; < 20W standby
Max current draw: < 8A / 230V
Inputs: XLR balanced, RCA unbalanced
Trigger voltage: 12V in, 12V out
Trigger input/output: 3.5mm jacks
Dimensions: 440(w) x 254(h) x 545(d), mm
Weight: ~65kg, 95kg shipping

Got a pair of German Physik Gaudi's? Running out of headroom? Look no further. Analog Domain are making waves in the uber-fi category being chosen to drive challenging speakers in the "uber" class.

Munich 2014 Hi-end show they got rave reviews powering some extreme speakers.

As they say in the muscle car game "there's no substitute for cubic inches"........



Sutherland: Power Blocks - Destination Series

400-watt ICE Mono Amplifiers

The most recent addition to the new Destination Series is the 400-watt Power Blocks, which are housed in the same low-profile chassis as all the other models in the line. The Power Blocks are based on the ICE Class-D module, but Sutherland has greatly modified the standard ICE module to suite his needs.

Ron Sutherland, known for his well-regarded phonostages, has recently brought his engineering skills to building preamplifiers and a power amp. Sutherland Engineering offers a brand new line called the Destination Series whose models can be characterized by “channel-separated construction”; everything is housed in separate L and R mono chassis.

The most recent addition to the new Destination Series is the 400-watt Power Blocks, which are housed in the same low-profile chassis as all the other models in the line. The Power Blocks are based on the ICE Class-D module, but Sutherland has greatly modified the standard ICE module to suite his needs.

We auditioned these amps in October 2013 against a range of ICE, Class D, and Linear alternatives from big name brands. PowerBlocks did not display ICE flaws in presentation and seriously impressed us.

Better known for his Phono stages and preamps Ron is no slouch when it comes to designing Power Amps. Compact and cool running they are the right solution to those looking for a musicality and simplicity of ownership and operation.