iFi ZEN CAN Signature 6XX Headphone Amplifier
Best dedicated amplifier for Sennheiser HD 6XX and 650 owners.
Elevate your listening experience with the iFi ZEN CAN Signature 6XX Headphone Amplifier. This open-box, Grade A unit offers a refined analog audio path, specifically tuned for Sennheiser HD 6XX/HD 650 headphones via its unique ActivEQ feature. Its dual-mono balanced circuit design and premium components ensure exceptional fidelity. Enjoy an expanded soundstage with XSpace mode and precise control with four gain settings. Versatile analog inputs and outputs allow for seamless integration into your audio setup, all protected by a 1-year limited warranty.
$269.10
Owner Satisfaction
4.7
/ 5
Category Rank
53
/ 733
#53 in Headphone Amplifiers
Price vs Category Average
-81%
Below average
Dimensions
117100304.63.91.2
/ (L) x (W) x (H) mm / '' (L) x ” (W) x '' (H)
Who it's for
- Sennheiser HD 6XX owners seeking a perfect sonic match
- Audiophiles driving demanding, high-impedance headphones
- Listeners wanting flexible connectivity and customizable sound profiles
Who should skip it
- Owners of headphones other than the Sennheiser 6XX series
- Budget-conscious buyers needing an all-in-one DAC and amp solution
- Minimalists with limited desk space for audio equipment
Performance breakdown
Sennheiser Synergy
ActivEQ tuning makes the HD 6XX series sound truly transformative.
Power Headroom
Robust output easily drives demanding headphones with plenty of dynamic range.
Signal Purity
The fully analog path delivers a clean, noise-free listening experience.
Soundstage Expansion
XSpace mode adds a convincing sense of depth to intimate recordings.
Gain Versatility
Four distinct settings provide precise volume control for any headphone impedance.
Build Integrity
Compact, solid-state construction feels durable and fits perfectly on any desk.
Key Specs
Dimensions
117 (L) x 100 (W) x 30 (H) mm / 4.6'' (L) x 3.9” (W) x 1.2'' (H)
Weight
0.75 kg / 1.65 lbs
THD+N
<0.0011% at 0 dBFS (BAL/SE)
Signal-to-noise ratio
<-117 dB(A) at 0 dBFS (BAL/SE)
Power Output
1600 mW (7.2 V) into 32 ohms (single-ended)
Power Consumption
0.887 W at idle using included iPower
Integrated DAC
Yes (Bit-Perfect DSD and DXD by Burr Brown)
Gain Settings
0dB, 6dB, 12dB, and 18dB
Features
- ActivEQ tailored for HD 6XX/HD 650
- XSpace analog mode widens soundstage
- Dual-mono balanced circuit design
- Four selectable gain settings
- High-quality internal components
- Versatile analog input/output options
- Fully analog signal path
- Includes iPower adapter
What customers say
The iFi ZEN CAN Signature 6XX receives exceptional praise for its specialized tuning, which profoundly enhances the listening experience for Sennheiser HD 6XX and HD 650 owners. Customers report the proprietary Signature circuit effectively removes perceived sonic limitations, delivering greater clarity, an expanded soundstage, and tighter bass while preserving the headphones' signature warmth. The amplifier offers robust power output, easily driving the 300-ohm load. Its build quality is consistently noted as premium and durable. While priced higher than the standard model, users find the investment worthwhile due to the unparalleled synergy achieved. This unit is viewed as a definitive, purpose-built upgrade for its intended audience.
Know before you buy
ActivEQ is a specialized circuit designed to calibrate the amplifier's frequency response to match the specific sonic characteristics of the Sennheiser HD 6XX and HD 650. It helps smooth out the midrange and improve the overall clarity, ensuring these headphones perform at their absolute best.
Yes, you can use it with any pair of headphones. While the ActivEQ is specifically tuned for the HD 6XX/650, the amplifier remains a high-performance, fully analog device that provides excellent power and fidelity for a wide variety of other headphone models.
XSpace is an analog spatializer that widens the soundstage, creating a more immersive, speaker-like listening experience. It is particularly useful for recordings that feel too 'in-your-head' or narrow, helping to place instruments and vocals with more perceived space.
The four gain settings (0dB, 6dB, 12dB, and 18dB) allow you to match the amplifier's output to the sensitivity of your headphones. Start at 0dB and increase the gain only if you find you cannot reach your desired volume level comfortably; this ensures you maintain the best signal-to-noise ratio.
The ZEN CAN Signature 6XX is a dedicated analog headphone amplifier, meaning it does not have a built-in digital-to-analog converter. You will need to connect it to an external DAC or an analog source, such as a CD player or a turntable with a phono stage, via the RCA inputs.
The 6.35mm jack is a standard single-ended connection compatible with most consumer headphones. The 4.4mm output is a balanced connection, which provides a cleaner signal path and higher power output, making it the preferred choice if your headphones have a balanced cable.
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$269