Full Video Review : Keces S4 Pre Amplifier

A Sonic Marvel of precision and practicality

Keces has been striving to remove the ambient noise from audio, and to make you enjoy the pure and crystal-clear sound quality, just like a true live performance.

The new stereo preamplifier S4 is the worlds first preamplifier with a built in DS Audio equalizer.

This newly launched preamplifier boasts a super high-end built in DS Audio EQ and normal MM/MC phono giving DS Audio customers more choice and higher performance in a supremely affordable price sector.

The uber-high performance MM/MC phono stage has been derived directly from the sensational Sphono, and also offers quite incredible performance.

The S4 preamplifier uses single-ended, zero feedback circuit topology, promoting a wonderful natural, organic and fluid sound.

S4 is of fully symmetrical construction, and offers a wide range of symmetrical (XLR) and asymmetrical (RCA) inputs and corresponding outputs.

Equipped with a class leading headphone amplifier and is complemented with the all-metal infra- red remote control handset.

DS Audio has been one of the pioneers in the industry for cartridge production, and we are honoured to have collaborated with them. This partnership allows us to offer more choices of equalization solutions for existing DS Audio customers.

• Single-ended, zero feedback circuit topology and demanding pure Class A valve operation and removing the need for a phase splitter.
• Fully symmetrical construction and offer a wide range of symmetrical (XLR) and asymmetrical (RCA) inputs and corresponding outputs.
• The pre-amplifier circuit boards are of symmetrical double-mono construction.
• The elaborate volume regulator is created by an R-2R network that has the same impedance at 128 possible, logarithmically tuned levels and guarantees an extremely good synchronism down to the lowest volumes.
• The new design uses low noise toroidal transformer in external supply.
• Built in DS audio EQ and MC/MM phono.
• Built in high-quality headphone amplifier.
• Fully dimmable front display which can also be actioned via the remote control.
• All-aluminium infra-red remote control handset.
• The components and materials employed are uniformly of top quality.

• Symmetrical double-mono architecture
• Single-ended, zero-feedback circuit topology
•  R-2R network volume control
• Input MM/MC / DS-Audio optical / RCA / 2 x XLR
• Input impedance MC: 56/100/220/470/47 k, MM: 47 k, OPT: more than 10 k, RCA/XLR: 170 k
• Output RCA*2 / XLR*1 / Headphone XLR-4pin
• Total harmonic distortion (THD+N) MM<0.02%, MC<0.05%, OPT<0.04%, RCA<0.0015%, XLR<0.0015%
• S/N MM: 78 dB A-Weighted, MC: 70 dB A-weighted, Optical: 75 dB A-weighted, RCA/ 110 dB A-weighted, XLR: 110 dB A-weighted
• Gain MM: 52 dB / MC: 72 dB / OPT: 32 dB RCA/XLR: 20 dB
• Power Requirement standby: 0.5 Watt maximum: 90 Watts
• Including infrared remote control
• Casing All Aluminum
• Weight 4.5 kg (power supply ) + 3.5 kg (preamp)
• Dimension 300x279x66mm each