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Chord Electronics BerTTi
BerTTi is a fully balanced 75-watt stereo power amplifier benefitting from the latest ULTIMA dual-feed-forward topology. Extending the range of ULTIMA-technology Chord Electronics amplifiers, BerTTi makes full use of advanced error-correction technology which monitors and immediately corrects signals before the output stage for astonishing accuracy and unrivalled fidelity from a compact-chassis device.
BerTTi features both balanced and unbalanced inputs, high-quality gold-plated loudspeaker outputs, plus a 10 A IEC power inlet. Further features include two modified power supplies for increased performance, plus an additional auxiliary power rail for the front end, which provides extra voltage to drive the custom-made MOSFETs.
British-built, BerTTi brings the next-generation ULTIMA topology to the ground-breaking Table Top (TT) range. When combined with the resolving power of the award-winning Hugo TT 2 DAC/preamp, the duo offers new levels of sonic performance from a small system. The addition of the Hugo M Scaler upscaler, with the ability to upscale audio to 705.6 kHz, 16x CD’s native resolution, makes the three-box system truly class-leading.
Inputs:
1x stereo pair of balanced XLRs
1x stereo pair of gold-plated unbalanced RCA
Output:
1x pair of gold-plated speaker terminals
Key Features
Trickle down ULTIMA tech
Dual feed-forward error correction
Fully balanced system
HF Switch mode power supply
Proprietary MOSFET
Compact design
Solid Aluminium Chassis
Included Accessories
Bertti Quickstart guide
Safety instructions
10A Mains IEC cable
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Chord Electronics BerTTi — compact power with Ultima pedigree
The BerTTi channels Chord's Ultima topology into a compact, table-top stereo amplifier that prioritises neutrality and resolving detail. Reviewers from hi-fi+ (Simon Lucas) and StereoNET (David Price) praise its supremely neutral midrange, fanatical detail retrieval and seamless integration across bass, mids and treble. Despite a conservative 75 W/8 Ω rating, the BerTTi delivers authoritative, fast bass and excellent control of dynamics, plus a large, organised soundstage with stable imaging. Built from precision-machined aircraft-grade aluminium, it’s finished for desktop or compact-rack use and runs cool thanks to internal thermal management. Ideal for listeners seeking high transparency, refined dynamics and rock-solid build in a compact footprint, the BerTTi makes a strong case as a premium, discerning amplifier choice.
Pros
- Exceptionally neutral, revealing midrange and detailed retrieval that illuminate vocal and instrumental nuance.
- Impressive dynamics and low‑end authority for a 75 W/8 Ω Class AB design—fast transients and rhythmic grip.
- High-quality, compact construction—precision-machined aircraft‑grade aluminium, sensible desktop dimensions and effective thermal management.
- Wide, organised soundstage with stable imaging that helps lock instruments and vocals in place while preserving musical context.
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Cons
- Output is modest compared with some rivals—buyers seeking maximum watts-per-pound may find more raw power elsewhere.
- Delivery leans toward a matter‑of‑fact, unromantic presentation that may not suit listeners who prefer warmer, coloured tonality.
Sound Quality
91/100
Dynamics
91/100
Reviewers repeatedly cite the BerTTi's strong transient grip and headroom despite a modest 75 W/8 Ω rating: 'vice-like grip', 'authority over the low end is absolute', and it 'puts significant distance between the dynamic extremes'. StereoNET and hi‑fi+ both note it drives dynamic transients without strain and tracks fluctuations faithfully, so its dynamics are excellent for a Class A/B 75 W/channel design.
Soundstage Imaging
91/100
Reports describe a large, organised and persuasive soundstage with stable images and good separation ('locks individual elements in place', 'highly even and open window'). The amp sustains spatial cues even while delivering dynamic authority, producing an expansive and precise presentation.
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Build Quality
92/100
Construction and finish are consistently praised: precision-machined aircraft-grade aluminium two-piece metalwork, excellent internals and a quiet, well-managed thermal design with four internal fans. The use of twin switched-mode supplies, a new auxiliary supply and solid speaker/binding terminals further underpin a high build-quality rating.
Value for Money
89/100
Reviewers reference the BerTTi's £3,995 RRP and judge it justified by performance and finish ('makes an extremely sturdy case for costing what it does'), while noting it delivers 75 W into 8 Ω — less raw wattage than some cheaper rivals (e.g., Exposure 3510) but offering superior refinement and neutrality. Contextual value is positive: a justified premium for buyers prioritising transparency and build, though those seeking sheer power per pound may prefer alternatives.
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