Audiophile Amplifier Modules

821 Standard Preamplifier Modules

Made for the Naim NAC32, NAC32.5 and NAC72 models as well as our own Avondale 821 Preamplifier.

A brand new edition of the unique Avondale Audio zero feedback, single ended, transconductance design.

The circuit, designed by Les Wolstenholme, is a simplified version of that used in the well-known and revered ‘Graduation One’ preamplifier.

This edition of the best selling 821 has been specially voiced for owners of Naim Audio preamplifiers who desire a greater level of musical clarity than the existing 321 modules can attain.

Drawing upon a wealth of knowledge and experience Avondale Audio has brought this deceptively simple circuit up to higher levels of audio performance, as well as managing to bring the price right down.

A few of the immediate upgrades in the layout and materials are:

· Revised component position results in a vastly reduced signal path and reduced noise
· Superior sounding military grade brass cased tantalum capacitors used in the signal path
· High quality, tight tolerance metal film resistors
· High quality Nippon Chemicon Electrolytic Capacitors
· Premium polystyrene and polypropylene capacitors

821 AR Preamplifier Modules

Made for the Naim NAC32, NAC32.5 and NAC72 models as well as our own Avondale 821 Preamplifier.

The latest incarnation of the unique Avondale Audio zero feedback, single ended, transconductance design.

The circuit, designed by Les Wolstenholme, is a revised version of that used in the well-known and revered ‘Graduation One’ GRAD1 preamplifier.  Here, it has been adapted so as to be suitable for owners of Naim Audio preamplifiers who desire the highest level of musical clarity that these excellent preamplifiers can achieve.

In considering the output levels of most modern source components, the 821s provide more of a match than the over-sensitive 321 modules fitted to the Naim pre-amps.  In reducing the 821 overall gain to around three, the user then has finer control over the volume level.

The high gain and heavy feedback of the original 321 modules produces an intrusive ‘hiss’, audible in some cases from the listening position.  The 821s have no such problem – they are almost totally silent and the bonus of having no global feedback means that transients are handled with consummate ease allowing a deeper insight into the music.

Drawing upon a wealth of knowledge and experience Avondale Audio has taken this deceptively simple circuit to an audibly higher plateau of performance.

A few of the immediate upgrades in the layout and materials are:

· Thick 2mm PCB substrate with gold plated pads
· Avondale’s unique ‘litz’ PCB tracking in the signal path
· Double thickness copper track for reduced impedance
· Revised component position results in shorter signal path
· Large film capacitors used in the signal path
· Extremely high grade ‘Bulk Foil’ resistors
· Nichicon KZ and Panasonic electrolytic capacitors
· Premium polystyrene and polypropylene capacitors
· Matched transistors for each pair

321 'AR' Preamplifier Modules

Suited to the Naim NAC32, NAC32.5 and NAC72 models as well as the Avondale 821 Preamplifier.

The new Avondale Audio 321 ‘AR’ for those who want the higher gain inherent in the 321 circuit, but also crave increased detail, transparency and overall musical insight.

The circuit, revised by Les Wolstenholme, is largely based upon the 321 circuit, that used in the well-known Naim NAC32, 32.5 and NAC72 preamplifiers.

Using this improved design, newly available components and painstaking matching for each pair as well as a host of otherAvondale Audio techniques, we are proud to bring you what we feel is far and away the best incarnation of the classic 321 design.

A few of the immediate upgrades in the layout and materials are:

· Thick 2mm PCB substrate with gold plated pads
· Extra large film capacitors used in the signal path
· Double thickness copper track for reduced impedance
· High grade ‘AMRG’ resistors and ‘AMCH’ capacitors
· Highest audio grade Nichicon KZ electrolytic capacitors
· Matched low noise transistors for each pair

NCC200 v1.4 Audiophile Power Amplifier Modules

Primarily designed as a drop-in replacement for the NAPA modules when upgrading Naim amplifiers, the NCC200 has found a use in many self build projects and for which, the stability, reliability and ease of installation (only one simple adjustment), have made this module a DIY favourite all over the world.

The difference in clarity and bass performance of the NCC when compared to the original NAPA modules is an experience which surprises everyone who sits in front of an amplifier so equipped. Listeners report being able to hear much deeper into the mix particularly when the going gets a bit busy. The lower registers, whilst being capable of portraying the timbre and texture of the instrument making the sounds in the recording, have much less impact on the rest of the audio frequency.

The NCC200s are unconditionally stable which enables the use of any brand and length of loudspeaker cable thereby widening the choice for the enthusiast. The characteristic Naim ‘hiss’ noticeable when close to the loudspeakers is totally absent when the NCC200s are in use.

NCC200 listeners report that the traditional pace and rhythm is retained whilst noting that the fatiguing aspects of Naim’s own boards have largely disappeared – leaving more of the music to be enjoyed. Capable of delivering just over 100 Watts with suitable heat dissipation, this favourite module may be configured to run from +/-30V DC up to +/-50V DC supplies according to output requirements.

The NCCs come ready built and tested with every jot of information necessary to install and simply set up the module.  Complete with fixing screws (stainless of course), wiring terminals and thermal paste, you will lack for nothing when you bring together a state-of-the-art amplifier to be proud of.  Should the unthinkable happen and you reach an impasse, you can rest easy in knowing that Avondale Audio’s legendary service will come to the rescue.