Graham Slee Revelation Switched EQ Phono Stage

Graham Slee Revelation makes it easy for you to archive older records.

Revelation M and Revelation C are archival phono stage preamplifiers with switchable equalisation, ideal for older 78 rpm records and old LPs. These play modern vinyl extremely well too.

The M version is for high output cartridges, and the C version is intended for low output Moving Coil cartridges. Both models available in Silver finish only.

As well as being a stereo RIAA preamp there are settings for other types of record, so rather than guessing the tonal balance, the Revelations have all the EQ settings you should need arranged on a three switch front-panel matrix.

Each one is supplied with an Old Record EQ information sheet, and more information on old record EQ can be found here.

There is a model for high output cartridges - the Revelation M; and a model for low output moving coil - the Revelation C.

The Revelation M is available with either the basic green energy power supply or the PSU1 power supply for improved sonics. The Revelation C is supplied with the PSU1 power supply only. Both models are fitted as standard with a rear panel mono-switch.

Pre-Set EQ

Research by Graham Slee into the equalisation required for numerous old record labels makes it easy for you to select the most suitable tonal balance time after time.

Being arranged as presets on front panel switches, the guesswork of variable controls is taken away, leading to repeatable results. The different EQ settings will allow you to obtain a good tonal match to what the the original sound would have been on 78 rpm records, vinyl LPs and EPs.

There is also an RIAA setting for modern stereo vinyl records, which makes it a significant stereo RIAA preamplifier. The Revelations are suitable for professional archiving use as well as private use where you want the option to play and archive records from different eras.

Revelation M

The Revelation M stereo RIAA stage is for high output cartridges of the moving magnet, high output moving coil and high output moving iron varieties.

Based on the Reflex M hi-fi RIAA preamp, it is optimised for these high output cartridges. The input stage has more than adequate dynamic headroom to be able to accept the largest signal peaks.

This mean it can handle peaks without slew-induced distortion, and transients whether musical or due to surface imperfections, do not get slew-distorted. This is an important factor which means archival copies will retain more of the original detail with fewer distortion artefacts.

Revelation C

The Revelation C model was designed for archivists with a preference for low-output moving coil cartridges, and is based on the Reflex C hi-fi RIAA stage moving coil phono preamp.

Power Supplies

For best results Graham Slee recommend you choose the PSU1 power supply option for the Revelation M. It is otherwise available with the basic power supply which is low-energy and is suitable where equipment has to comply with low-carbon targets. The Revelation C is only supplied with the PSU1.

Features

• Designed for professional archiving purposes, plus home enjoyment,
• Includes RIAA setting for modern stereo vinyl records.
• 3-stage switchable EQ makes it quick + simple to adjust for different records.

Specifications / Revelation M

• Input Sensitivity Range: 2 mV - 10 mV
• Output Range: 224 mV - 1120 mV (for above inputs)
• Maximum Input: 46 mV rms
• Maximum Output: 5.2 V rms
• Gain: 41 dB (112) @ 1 kHz
• Input Impedance: 47 kOhms plus 100 pF (200 pF approx. with arm cable capacitance)
• Output Impedance: 1 kOhm (will drive 10 kOhms and above)
• Noise At Output: -68 dB CCIR Q-pk, EIN -109 dB
• Distortion: Typically 0.01 %
• RIAA Accuracy: <0.3 dB
• Frequency Response: 20 Hz - 200 kHz (flat, corrected to RIAA)
• Channel Balance: 0.2 dB
• Channel Separation: 60 dB
• Size (WxHxD): W: 107 x 50 x 180 mm (inc. jacks)

Specifications / Revelation C

• Input Range: 0.2 mV - 1.0 mV
• Output Range: 252 mV - 1260 mV (for above inputs)
• Maximum Input: 3.9 mV rms
• Maximum Output: 4.91 V rms
• Gain: 62 dB (112) @ 1 kHz
• Input Impedance: 100 Ohms
• Output Impedance: 1 kOhm
• Recommended Load Impedance: 10 kOhm or greater.
• Noise At Output: -62 dB CCIR Q-pk, EIN -124 dB
• Distortion: 0.02 %
• RIAA Accuracy: <0.5 dB
• Frequency Response: 20 Hz - 200 kHz (flat, corrected to RIAA)
• Channel Balance: 0.2 dB
• Channel Separation: 64 dB
• Size (WxHxD): W: 107 x 50 x 180 mm (inc. jacks)

Included

• 1 x Revelation M or Revelation C.
• 1 x Power Supply.

More Information

• Revelation M / Revelation C, by Graham Slee