Accession MC Phono Stage, incl PSU1 Enigma power supply!

Graham Slee's Accession is a very special phono preamplifier. It is optimized for connecting high-quality MM or MC pickups.

A special RIAA equalization enables particularly low distortion, especially in the high-frequency range. The sound image appears freer and finer as a result.

The equalization curve is designed according to RIAA, here the accession follows Allen other phono stages.

However, the Access can do more: At the push of a button, it offers further characteristics in order to adapt the reproduction as best as possible to the original: in addition to RIAA also NAB (pressings from the USA) and FFRR (pressings from England). The differences are clearly audible, the Accession offers with NAB or FFRR-equalized pressings a much more natural sound.

Thanks to complex electronic components, the entire pre-stage is particularly low-noise. The powerful analog power supply (PSU1) with 24V voltage enables the Accession to have a high headroom - this also contributes to an exceptionally low level of distortion. The analog power supply PSU1 in the Enigma variant has been specially developed for MC cartridges. This power supply also refines the sound.

The Access offers both fixed and variable output voltage. A volume control on the front panel is useful if you want to connect your Accession directly to a power amplifier (eg Graham Slee Proprius).

Technical specifications:

Phono preamplifier for MM or MC cartridges
with MM version: input capacity switchable
with MC version: input resistances switchable
Equalization by means of a special circuit? extremely low distortion
Equalization characteristics RIAA (standard), NAB (USA) and FFRR (GB)
Equalization that can be switched off for special studio recordings
Stereo/Mono switch
two RCA outputs
fixed output voltage
variable output voltage (volume control on front panel)
Analog stage with particularly low-noise components

Specs:

Connectors: 360° RCA/phono, gold plated
Input sensitivity range: 0.125 - 0.84mV
Output range: 145mV to 975mV
Max input: 4.2mV rms
Max output: 4.876Vrms
Gain: 61.3dB (1161) at 1kHz
In Impedance: 500, 300, 100, 75O
Out Impedance: 750/470 fix/vary (=10kΩ)
Noise @-65dB: A wtd (20Hz-kHz) 0dBu
Distortion: typically 0.02% 20Hz to 20kHz
RIAA accuracy: ± 0.3dB (sampled)
Freq response: 20Hz - 100kHz (±0.-1dB norm)
Channel balance: 0.2dB
Channel separation: 60dB
Linear Power Supply: remotely via PSU1
Dimensions (WHD): 107 x 50 x 195mm