Chord Electronics
BerTTi
BerTTi is the cheapest way into Ultima amplifier technology, and it was designed to sit under a Hugo TT 2 and finish the system. Fully balanced, 55 watts into 8 ohms, with the same dual-feed-forward error correction as the full-size Ultima amplifiers: it measures the signal and corrects it before the output stage rather than afterwards, which is what keeps a small amplifier composed when the music gets difficult. Two modified power supplies feed it, with an extra rail dedicated to the front end so the custom MOSFETs are never short of voltage. Balanced and unbalanced inputs, gold-plated speaker terminals. Three and three-quarter kilos in the same 23.5-centimetre footprint as the TT range. The Speaker Shack made it Product of the Year in 2024.
Specifications
| Inputs | 1x stereo pair of balanced XLRs; 1x stereo pair of gold-plated unbalanced RCA |
|---|---|
| Outputs | 1x pair of gold-plated speaker terminals |
| THD | 0.008% |
| Signal-to-noise ratio | 87 dB (A-weighted) |
| Frequency response | 5 Hz-100 kHz +/- 0.5 dB |
| Output power | 55 W into 8 Ω |
| Gain | 30dB |
| Input impedance | 100kΩ Unbalanced/Balanced |
| Input sensitivity | 0.78 V |
| Power consumption | 240 W |
| Power consumption, standby | 1 W |
| Materials | Solid Aluminium Chassis |
| Dimensions | 59 mm (H) 235 mm (W) 256 mm (D) |
| Weight | 3.75kG |
| In the box | Bertti Quickstart guide; Safety instructions; 10A Mains IEC cable |
Where to listen
Every model is sold and demonstrated through Joenit's authorized dealer network across Europe. Find your nearest dealer to hear it for yourself.
