/* Hide prices on sold out products */ .post-type-store-item.sold-out .product-price { display:none; }
Skip to Content
VAL HiFi
What's new
Products
Brands
Shop
All
Shop by Brand
Shop by Type
Ex-demo/pre-owned
Gift Cards
Contact
View Cart
Music
Ex-dem/used
About
Why VAL HiFi
Testimonials
Privacy Policy
Refund Policy
Blog
Login Account
0
0
Contact Us
VAL HiFi
What's new
Products
Brands
Shop
All
Shop by Brand
Shop by Type
Ex-demo/pre-owned
Gift Cards
Contact
View Cart
Music
Ex-dem/used
About
Why VAL HiFi
Testimonials
Privacy Policy
Refund Policy
Blog
Login Account
0
0
Contact Us
What's new
Folder: Products
Back
Brands
Folder: Shop
Back
All
Shop by Brand
Shop by Type
Ex-demo/pre-owned
Gift Cards
Contact
View Cart
Music
Ex-dem/used
Folder: About
Back
Why VAL HiFi
Testimonials
Privacy Policy
Refund Policy
Blog
Login Account
Contact Us
A-3core_silver_front.jpg
A-3core_rear.jpg
A-3core_black_front.jpg

Soulnote A-3 Core stereo power amplifier

£13,900.00

This is a new power amp, borrowing heavily from the development of Soulnote’s flagship M-3 monoblock power amps and the more recent A-3 Integrated amplifier.

Shop Soulnote A-3 Core stereo power amplifier
Colour/Finish:
Quantity:
Add To Cart

This is a new power amp, borrowing heavily from the development of Soulnote’s flagship M-3 monoblock power amps and the more recent A-3 Integrated amplifier.

Shop Soulnote A-3 Core stereo power amplifier
A-3core_output_stage.jpg A-3core_power-relay.jpg A-3core_top.jpg A-3core_type-R_circuit.jpg

Technology

Complete separation of left and right channel GNDs

The GND separation technology incorporated in the P-3 pre-amplifier is applied to the A-3 Core power amplifier as well as the A-3 integrated amplifier. There is no precedent for GND non-grounding in stereo power amplifiers handling high currents. A-3 Core achieves power amplifier enclosure ungrounding through simple non-NFB circuits, optimized artwork design, minimization of high current loops, elimination of inductance components, and other factors. This led to the birth of the stereo power amplifier A-3 Core with completely separated left and right GND. The three-dimensional sound field space and spaciousness are the new frontiers of stereo power amplifier.

Single push-pull output stage

The output stage uses a single push-pull SEPP circuit with a TO3(Metal CAN-type) bipolar transistor as used in the M-3. It realizes blur-free music reproduction from ultra-low to super-high frequencies. The heart-stirring music reproduction is the result of the single push-pull that does not break the micro time axis purity

4-stage Darlington configuration with super-powerful driver and pre-driver

To drive the TO3(Metal CAN-type) transistor easily, ultra-powerful TO3P transistors are used in the driver as well as in the pre-driver. Ensuring perfect current supply all the way to the bottom end without regard to hfe fluctuation at high currents makes it possible to achieve both deep expressiveness and an exciting groove.

Copper bus bar heat sink

A lightweight, compact copper plate is used as the main heat sink. This heat sink also serves as a bus bar for supplying power to the TO3(Metal CAN-type) transistor, and the terminals of the TO3 transistor penetrate the bus bar and are mounted directly on the board underneath. This eliminates wiring, which is a drawback of the TO3 transistor, and helps overcome instability caused by the inductance component, while at the same time avoiding sound quality degradation caused by the insulation sheet dumping on the device. The sound quality effect is also extremely impressive, with a sense of freedom and transparency due to the physical independence of the heat sink from the chassis. Furthermore, in the A-3 Core, the power supply board and amplifier board are connected by a bus bar heat sink, which also serves as a structural component to form a block. It is truly a "four birds with one stone" heat sink.

New Type-R circuit, fully balanced non-NFB

For voltage amplification, a newly developed high-gain-to-GND single-stage Type-R circuit is adopted. Naked foil resistors are used generously for all resistors involved in amplifier operation.

GND anchor

The GND of the left and right channel power supply units is grounded to the left and right-side metal insulated with ceramic washers, a special enclosure construction that acts as a GND anchor. A sense of openness and low-end grip is achieved at a high level.

Super-strong power transformer

2x 700VA unimpregnated toroidal power transformers are used for the power amplification, to the left and right. In addition, three power transformers, including the control system power transformer, are packed into one enclosure. They are all mounted vertically so that the magnetic field lines are parallel to the board.

High-speed non-NFB power supply

For the rectifying capacitor, a specially selected high withstand voltage small capacitance low magnification foil filter capacitor of only 470uF is used. To optimize the capacity, the number of units used was determined and the load on the power transformer was reduced. This further improved the real regulation of the ultra-powerful power transformer. For the rectifier diodes, SiC diodes of the latest specifications with enhanced allowable inrush current are used. This is the most powerful and high-speed power supply configuration ever considered. In addition, two large power relays with excellent sound quality are used independently and without fixing as power switches for the two main power transformer. Independent power switch for each power transformer, which is a high current contact point, is extremely crucial for sound quality.In addition, the power switch on the front panel is dedicated to the control system sub-transformer.

Unfixed structure

The amplifier block, terminals, AC inlet, top cover, and bottom cover are all unfixed. In particular, the amplifier block uses a three-point lateral sliding structure with titanium sliders. While escaping from the harmful vibration of the power transformer, it also releases its own intrinsic vibration.

Specifications

Model name
A-3CORE SE (Premium Silver), A-3CORE BE (Premium Black)

Rated output
120W + 120W (4 ohm)

Total harmonic distortion
0,27% (1W, 8 ohm)

Frequency characteristic
2Hz bis 200kHz (+/- 3dB, 1W, 8 ohm)

Input sensitivity / impedance
480mV / 24kΩ

Maximum gain
33dB

Power voltage
230V AC 50Hz

Power consumption
180W/86W (during idling)

Maximum external dimensions (including spike feet)
454(B) x 189(H) x 435(D)mm

Weight
29kg

Included accessories
Spike board, spikes, spacer (for Spike board floating), power cable

You Might Also Like

soul note a-3_1.jpg soul note a-3_1.jpg soul note a-3_1.jpg soul note a-3_1.jpg
Soulnote A-3 integrated amplifier
£19,000.00
soul-note-s3-reference-1.png soul-note-s3-reference-1.png
Soulnote S-3 Reference sacd/cd player/dac
£19,900.00
soul-note-p3-1.png soul-note-p3-1.png
Soulnote P-3 preamplifier
£18,900.00
soul-note-d3-1.png soul-note-d3-1.png
Soulnote D-3 dac
£18,900.00
soul-note-m3-1.png soul-note-m3-1.png
Soulnote M-3 mono power amplifier (each)
£17,900.00

Subscribe to our newsletter.

Sign up with your email address to receive news and updates.

Thank you!

Looking for something in particular? Use the search bar below:

Follow us on instagram #val_hifi

Aurorasound HFSA-01 hybrid valve integrated amplifier and NewOntech DAC 08 is our go to affordable high end electronics power duo. This is boutique HiFi at it's best.

www.valhifi.co.uk

#newontech #newontechdac #hifi #madeindenmark #dac #newdac #aur
A few highlights from high end:

@oephi_audio smashed it of course, but perhaps most shocking was their new entry level Ascendence speaker in a second room with @moonriveraudio. I was so taken aback I didn't even think to take out my phone to capture
A beautiful, sophisticated and spectacular system.

Soulnote A2 integrated amplifier 
Aurorasound Vida phonostage 
Transrotor Massimo Nero turntable 
Sonus Faber Maxima Amator loudspeakers

Hook this all up with @oephi_audio cables and away you go.
Qobuz Connect is live and working beautifully with @wattson_audio ! Has all the convenience of that "other" Connect but actually sounds good - correction, it sounds phenomenal.

Our partnering @exd.audio konNET switches delivering the goods
Joakim Juhl and Sven Boenicke are two passionate visionaries in audio - each carving out a distinct but complementary path in the pursuit of emotional, deeply engaging sound.

Joakim, the mind behind @oephi_audio approaches loudspeaker design as both
OePhi Transcendence 2 stand-mount fronting a system of astonishing talent - a Grimm Audio MU1, Soulnote D2 DAC and the mighty A3 integrated amplifier.

"These speakers proved to be absolutely thrilling with powers of engagement that put them up

ABOUT VAL HIFI

VAL HiFi takes a curated approach to hifi retail. Our passion is for discovering, supporting and championing boutique brands that give our customers a transcendent audio experience. The very best in HiFi does not always come from the most well known brands and we believe we have the ultimate alternatives.

OUR DETAILS

VAL HiFi
Ashford & Tunbridge Wells, Kent

Greg Chapman
Tel: 0333 577 2005
Mob: 07717477994
send us an email

MENU

Home
What’s new
Testimonials
Contact
About us
Privacy Policy
Refund Policy