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iFi Audio Zen Can Headphone Amplifier

With an MRP of just Tk 13,800, the ZEN CAN sports many features usually reserved for high-end headphone amps at many times the price. The ability to drive tough headphone loads, the balanced circuit design, the vanishingly low levels of distortion and versatile sonic tailoring options to optimise performance are all highly unusual at such an eminently affordable price tag. By combining them in one package, iFi is once again pushing the envelope of affordable desktop audio.

As an all-analogue headphone amp, the ZEN CAN has no digital input of any kind, USB or otherwise. It connects to any audio source with an analogue output, such as the headphone output from a DAP (Digital Audio Player), a laptop, a tablet or a smartphone, or the RCA outputs from, say, a CD player or phono stage. It could be paired with the ZEN Blue to add Bluetooth reception, or combined with the ZEN DAC to upgrade the DAC’s headphone amp stage. As well as a headphone amp, it can double as a preamp to feed a power amp and speakers or a pair of active speakers.



Making the most of all kinds of cans

In common with the other ZEN Series products, the ZEN CAN sports a sturdy, smartly finished aluminium enclosure, neatly sized at 158x35x100mm (WxHxD). In the centre of the front panel is a smooth-acting rotary volume control, flanked by a range of sockets and buttons. On the left, beside the power button and input switch, resides a control for selecting the appropriate gain. Four settings in six dB steps – 0dB, 6dB, 12dB and 18db – enable the amp to precisely suit the connected headphones; unity gain (0dB) is useful to ensure low noise with sensitive in-ear monitors, while the higher gain settings make the most of tougher headphone loads, delivering excellent dynamic headroom.

To the right are a pair of headphone outputs – a 6.3mm output for headphones that have a standard single-ended connector (compatible with all headphones) and a 4.4 Pentaconn balanced output for headphones offering balanced connection. An increasing number of high-quality headphones and in-ear monitors either come so equipped or give the option of detaching the cable and upgrading to a 4.4mm Pentaconn connector, and this output makes the most of them (it is particularly recommended for high-impedance headphones).

Next to the headphone sockets is a button to engage the latest versions of iFi’s ‘XBass’ and ‘3D’ sonic tailoring options for headphones. XBass adjusts frequency response to enhance low frequency performance – particularly useful with openback headphones that ‘leak’ deep bass. 3D compensates for the ‘in-head localisation’ effect that often occurs when using headphones to listen to music that was mixed using a pair of speakers, effectively widening the headphone soundstage to deliver a more speaker-like experience. Both XBass and 3D engage purely analogue processing and may be bypassed entirely if preferred.

Around the back, the ZEN CAN offers stereo RCA and 3.5mm single-ended inputs, plus a balanced 4.4mm Pentaconn input. A 4.4mm balanced output is also provided, to connect to power amps and active speakers equipped with a balanced input – either a Pentaconn 4.4mm input, or XLR inputs via a 4.4mm-to-XLR cable. This balanced output can also be used for single-ended connection if no balanced input is available. All the ZEN CAN’s inputs and outputs are gold plated for optimal conductivity.


Circuit highlights: delivering the balance of power

The ZEN CAN’s circuitry is a balanced, symmetrical dual-mono design – a topology usually reserved for high-end headphone amps. Balanced circuits have long been championed by renowned high-end audio electronics engineer John Curl, now a technical consultant for iFi, given their ability to reduce noise within the signal path. Curl has worked closely with iFi’s in-house technical team, headed by Thorsten Loesch, to produce an analogue circuit of exceptional quality for a device of this kind.

A number of key elements have trickled down from the discrete Class A circuitry developed for iFi’s flagship headphone amplifier, the Pro iCAN, which is 12
times the price of the ZEN CAN. It offers prodigious drive capability for such a modestly priced headphone amp, delivering 1600mW (7.2V) into 32 ohms from the single-ended output, with 15V+ available to loads of 300 ohms or more through the balanced output, ensuring the ZEN DAC takes even current-hungry planar headphones in its stride.

SPECIFICATIONS

Input Voltage DC 5V/2.5A AC 100 -240V, 50/60Hz (iFi iPower included)
Max Output Balanced >15.1V/385 mW (@ 600 Ohm) >6.0V/1150 mW (@ 32 Ohm)
S-E >7.6V/98 mW (@ 600 Ohm) >7.2V/1600 mW (@ 32 Ohm)
THD & N Balanced <0.006% (@ 360 mW/2.4V 16 Ohm)
S-E <0.005% (@ 100 mW/1.27V 16 Ohm)
SNR Balanced >120dBA (@ 15.2V)
S-E >118dBA (@ 7.6V)
Max. Input Balanced 7.4V RMS
RCA 3.8V RMS
3.5mm 1.92V RMS
Gain 0dB, 6dB, 12dB and 18dB
Frequency Response 20Hz - 20kHz (-3dB)
Power consumption No Signal ~5W
Max Signal ~13W
Power consumption < 1.5W via USB power OR 5v DC (power supply not included)
Dimensions 158 x117 x35 mm 6.2" x 4.6" x 1.4"
Net weight 515g (1.14 Ibs)
Warranty period 1 Year