NORD THREE PURIFI 1ET400A POWER AMPLIFIER

OVERVIEW

We are exited to offer our new Purifi 1ET400A based amplifier using new REV D buffer boards and a new symmetrical internal and rear panel layout with shorter cable runs. To crown our new Amplifier a new Aluminium embossed badge with new flush fitted switch as we constantly improve our product.

Now available as an option, our Easy-Stream Internal module can be specified to add music streaming facility See here for full details. With automatic switching between streaming service and external audio input.

All Purifi 1ET400Aare modular, PSU, AMP and buffer. Making them easily upgradable in future developments of our Input Buffer. They are also easy and open to maintain. 

The new board uses modern versions of an old Op Amp used primarily in Studio mastering and mixing equipment. Their development was focused solely on Audio performance and have been bought up to SOTA design and performance. Rev D will also accept previous 8 pin Sparkos and Sonic Imagery OP Amps. Details of Op Amps Click Here

Using Two Purifi 1ET400A amp modules with two SMPS1200 power supplies one for each channel. O

The SE uses a higher grade case, rigid hidden corners, with a much smother finish. SE Case detail here

The new board uses two Op Amps per channel and runs even further into Class A delivering up to 250mA of Class A current fed into the Purifi 1ET400A module. The result is more tonal depth, dramatic improvement in bass, even greater depth of soundstage, slightly more detail all wrapped in a balance of rich texture and harmonics, bottom-end presence , amazing dynamics, exquisite resolution in the mids and upper frequencies, and a fully revealed, fully dimensional sound stage  Headroom and listening volumes have increased and all combine in a totally musical non fatiguing Class A sound. Gone, if there was any hint, of solid state amplifier.

After an intense development and Op Amp evaluation we tried 3 op amps, from John Hardy, Sonic Imagery and Sparkos Labs. Despite excellent reports on the John Hardy 990C we preferred the Sparkos 2590 and Sonic Imagery 990 Enh. Both are excellent the difference in presentation is less than with the previous versions we used. We much prefer the Sonic Imagery. The Power sections Panasonic electrolytic capacitors value were chosen to deliver the best and fastest combination of attack and sustain the bass notes, small values have a faster flinch capacity to deliver crisp bass. To small and they run out of power to deliver sustained bass. We evaluated multiple devices before settling on 22uF. 

The new REV D buffer will also accept the two previous Op amps The SI994 and the Sparkos SS3602 in DIP8 packages. We have also further enhanced the peripheral circuit implementing further counter noise reduction.

The new amp also benefits from a new symmetrical internal and rear panel layout resulting in shorter internal cable runs. We have also rebated the front Stainless Steel switch for a cleaner front panel (photos are not rebated) which has a Dim and Off setting via the back panel.

SPECIFICATIONS

  • Beautiful Quality Japanese made Case with a Fine Brushed Anodized Finish. Solid and Resonance Free. CNC Machined In House.

  • Solid Polished Aluminium  Isolation Feet with Rubber Inserts.

  • High Quality internal Cabling Shrink Sleeved for Reliability.

  • Switchcraft Gold Plated Metal XLR Sockets.

  • Hypex QuietConduit NCore Cable for XLR Connection.

  • Patented Gold Plated CHK 60A Binding Posts, WBT Nextgen 0307 Option.

  • 14 AWG Silver Plated OFC Pure Copper with Teflon Dielectric, Neotech UP-OCC 14AWG solid OCC Copper Option.

  • 19mm Brushed Stainless Steel Dimmable LED Front Switch.

  • Buffer Uses, Audio Grade Ultra Quite Polystyrene Capacitors in Audio stage, 1% Metal Film Resistors, Panasonic Electrolytic Capacitors in Power Section, Samtec Gold Plated 36 Pin Connects to Purifi 1ET400A Module. All soldered using WBT-0840 Silver Solder.

  • A Dash of Passion, Pride, And Practice ensure a superbly made Amplifier.

• Two Purifi 1ET400A Modules (Stereo)

• Two Hypex SMPS1200A400 Power Supply (Stereo)

•  Nord One UP Input Buffer REV D Boards Choice of                            Sparkos SS2590 or Sonic Imagery 990Enh Op Amps. Rev D will      also accept previous 8 pin Sparkos and Sonic Imagery OP Amps.

• Stereo True Dual Mono Design 

• SNR 131dB

• Frequency Response: 20 - 20kHz +/-.01dB

• Low Distortion: THD+N 100W - - 0.001 % 20-20kHzHz

• High Input Impedance 51K

• Input Sensitivity 8ohm 2.52Vrms 10.24dBu

• 26.8 dB Gain

• Ultra High Damping Factor

• High Current Output Capable of driving 2ohm

  (for the Most Demanding of Speakers)

   450W 2ohm

   450W 4ohm

   227W 8ohm

• Efficiency >94% 

• Idle Loses  output Stage ~1.7W

• XLR Balanced Inputs

• 2 Years Warranty

• Stereo Case W 430mm D 331mm H 70mm

  (With Feet and Binding Posts W 430mm D 375mm H 83mm)

    Weight 9Kg 

• Mono Block Case W 280mm D 231mm H 70mm SILVER, BLACK H 94mm  

   Weight 4.2Kg  

• 3 Channel W 450mm D 393mm H 94mm

   Weight 12Kg

• 2 Years Warranty

Purifi 1ET400A Amplifier Module .png
Nord REV D BUFFER WITH SONIC IMAGERY 990

Purifi 1ET400A Amplifier Module

 

2 x 1200W

SMPS1200A400

Optional WBT 0703Cu

Binding Posts.

Optional Neotech UP-OCC

Out-Put Wire

Nord REV D discrete Input Buffer

CONTACT 

Nord Acoustics Ltd

Kensington Villa, 1 Selkirk Street, Cheltenham
Gloucestershire, GL52 2HY

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SITE MENU

+44 (0) 1242 650559

colin@nordacoustics.co.uk

© Nord Acoustics 2016  |  Registered in England No 10439946  |  Tel:  +44 (0) 1242 650559  |  Email:  colin@nordacoustics.co.uk     Designed by Hausman Graphics

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