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audiolab 6000A Integrated Amplifier

£599.00

Audiolab 6000A is the integrated amp from the 6000 range, which replaces the 8000 range and delivers premium-level performance and build quality at an affordable price.

Audiolab 6000A Integrated amplifier comes fully loaded with digital and analogue sources, wireless connectivity for portable devices, a phono stage to cater for vinyl playback and amplification for headphones as well as speakers.

Classic Hi-Fi for Modern Age

The 6000A’s lead electronics designer is Jan Ertner who was responsible for the 8300A, as well as many other award-winning audio components over the years. When challenged to deliver 6000A at such a low price point, Jan returned to the technologies implemented in the 8300A and painstakingly redeveloped them, whilst adding high-quality digital circuitry to the mix.

The consequence is a next-level amplifier evolved from the build of its sibling, bringing exceptional sound class beside the elastic facilities. The 6000A resonates the concept of the original 8000A from the early 1980s rebooted with the value of Audiolab’s latest skills. When considering inflation, it is also the most low-cost amplifier Audiolab has ever manufactured.

Digital Circuitry

Much effort has been made to ensure the 6000A’s digital circuitry delivers the level of quality one might expect of a high-performance standalone DAC. As ever, Audiolab has turned to the ES9018 Sabre32 Reference chip family to perform D/A conversion, utilising ESS Technology’s 32-bit HyperStream architecture and Time Domain Jitter Eliminator to deliver ultra-low noise and high dynamic range.

Audiolab knows that if the circuitry surrounding the ES9018 is not adequate, the resulting music can seem a little cold and hard. The 6000A’s brings out a captivating level of musical expression from the digital signal. Audiolab’s inventive, universally acclaimed M-DAC was among the first home audio components to comprise an ES9018 chip and Audiolab has been honing its operation ever since.

A vital element is the post-DAC active filter. Great attention was given to this circuit, developing a Class A topology using op-amps specifically chosen for their synergy with the ES9018. The amp’s four S/PDIF digital inputs – two coaxial and two optical – handle hi-res PCM data up to 24-bit/192kHz and benefit from three user-selectable digital filters: ‘Fast Roll-Off’, ‘Slow Roll-Off’ and ‘Minimum Phase’. These settings let the user optimise the response to suit the source and bandwidth of the partnering equipment. Bluetooth connectivity, with support for superior aptX, allows easy wireless streaming from smartphones, tablets, laptops and more. Paired devices also benefit from the DAC quality and three digital filter selections.

Analogue Circuitry

The 6000A’s discrete Class AB power amp stage delivers 50W per channel into eight ohms, with a maximum current delivery of 9 Amps into difficult loads. The output stage of the discrete power amp circuits uses a CFB (Complementary Feedback) topology, ensuring superior linearity and excellent thermal stability, as the idle current is kept independent of the temperature of the output transistors. A substantial 200VA toroidal transformer, followed by 4x15000uF reservoir capacity (60000uF in total), helps the amp to maintain firm control of the music whilst enabling excellent dynamic range.

The preamp section is kept as simple as possible to maintain signal purity, with line input signals passing to a precision analogue volume stage. The latter covers the range from -80dB to +8dB in steps of 2dB and 1dB (step resolution increases with volume position). Much effort has gone into the physical layout of the 6000A’s circuitry, protecting the sensitive preamp section from noise interference. This, plus the use of independent low-noise power supplies for critical stages, helps to deliver a performance that rivals significantly more expensive analogue amplifiers, even before taking the 6000A’s impressive digital circuitry into account.

Turntables & Headphones

In recognition of the recent vinyl revival, Audiolab has included a phono stage for moving magnet phono cartridges – a high-quality, low-noise, JFET-based circuit with precise RIAA equalisation. Similarly, an increasing number of people are using headphones for music listening, so Audiolab has incorporated a dedicated headphone amp with current- feedback circuitry. Its gain bandwidth and high slew rate ensure a dynamic, detailed and engaging performance with all manner of headphone types –more boxes ticked for this most integrated of integrated amplifiers.

Operational Modes

The 6000A’s flexibility with digital and analogue sources is not the only thing that makes it so versatile; it also offers three distinct operational modes, reflecting the amp’s discrete internal architecture and enabling it to adapt to its user’s evolving requirements. The primary mode is ‘Integrated’– this combines the pre and power amp stages, for the connection of digital and analogue sources to the amp’s inputs and a pair of speakers to its binding posts.

Pre-Power Mode disconnects the pre and power amp stages so 6000A can be used solely as a power amp e.g connected to an AV processor in a home cinema system. It also enables additional signal processing to be added, by connecting the 6000A’s ‘preamp out’ socket to an external processor, then returning the processor’s output to the amp’s ‘power amp in’ socket. Finally, ‘Pre Mode’ disables the power amp stage, turning the 6000A into a standalone preamp. This enables external power amplification to be added, thus providing a possible upgrade path.

6000A Specifications
Gain (max.) +8dB (Line)
+55dB (Phono MM)
Input Sensitivity 720mV (Line, Volume = 0dB)
3.1mV (Phono MM, Volume=0dB)
Input Impedance 10K (Line)
47K//100pF (Phono MM)
Total Harmonic Distortion (THD) < 0.0004% (Line, 1KHz @ 2V, Volume = 0dB)
Frequency Response 20Hz-20kHz (+/-0.1dB)
Output Voltage 2.3V max. (Volume = 0dB)
Output Impedance 120Ω
Signal-to-Noise Ration (S/N) > 110dB (Line, A-weighted)
>76dB (Phono MM, A-weighted)
DAC
D to A converter ES9018K2M
Total Harmonic Distortion (THD) < 0.0006% (1kHz @ 0dBFS)
Output level (0dBFS, 1KHz) 2.05V
Max. Sampling Frequency 192kHz
Signal-to-noise ratio (S/N) > 112dB (A-weighted)
Digital Filters Fast Roll-off , Slow Roll-off , Minimum Phase
Power Amplifier Section
Gain +29dB
Rated Max. Power Output 2 X 50W (8Ω, THD<1%)
2 X 75W (4Ω, THD<1%)
Frequency Response 20Hz-20kHz (+/-0.3dB)
Input Sensitivity 720mV
Total Harmonic Distortion (THD) <0.003% (1kHz @ 40W/8Ω)
Signal-to-Noise ratio (S/N) > 110dB (A-weighted)
Max. Output Current 9A
Headphone Amplifier
Total Harmonic Distortion (THD) < 0.01% (1kHz, 50mW)
Output Impedance 2.35Ω
Load impedance 20-600Ω
General
Standby Power Consumption <0.5W
Power Requirements 240V ~ 50 - 60Hz
230V ~ 50 - 60Hz
115V ~ 50 - 60Hz
100V ~ 50 - 60Hz
Dimensions (mm) (W x H x D) 445 x 80 x 330mm including feet, terminals and controls
Carton Size (mm) (W x H x D) 512 x 467 x 146
Weight 7.8kg (Net)

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