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amazon 7Hz Sevenhertz 71 reviews
7Hz is a brand that is very familiar to music lovers. Products manufactured by companies such as Timeless, Dioko, Zero, … are used by many audiophiles in Asia. Thinking that 7Hz was only limited to the field of headphone production, the company recently surprised everyone by launching the first DAC/AMP model called 7Hz Sevenhertz 71.
Located in the low-cost segment and facing competition from many other competitors, the 7Hz 71 is still highly appreciated by many audiophiles thanks to its neutral sound quality, clean sound background, and support for decoding both PCM and DSD music files and the design has a strange cyberpunk style.
Packaging and accessories
7Hz Sevenhertz 71 has packaging designed quite similar to the company’s low-cost headphone model, Zero. The outer cardboard box has a main color tone which is white. The use of bright tones has somewhat highlighted the main details on the box, including the logo, product name, image of the DAC/AMP, etc. 7Hz is also very clever in printing detailed images of the box. The circuit board system inside the DAC/AMP is on the back of the cardboard box.
Inside the cardboard box, the Sevenhertz 71 7Hz DAC/AMP is placed on a soft foam sheet. The included accessory is only a card printed with detailed technical specifications of the 7Hz 71.
Design
Because portability is the top priority, the 7Hz Sevenhertz 71 has a very compact design. Users can completely store the DAC/AMP in their pocket, shirt pocket, backpack briefcase, etc. Because the entire outer shell is made of plastic, the 7Hz 71 is very light in weight. The cable connecting the body of the device to the Type-C jack is also covered with soft plastic on the outside, minimizing breakage during use. The only minus point in the design is probably the cable because it is in the form of a solid wire, so upgrading or repairing the cable will be difficult.
The bold slits along with the blue LED strip on the 7Hz 71 will surely make many users think of modern technology devices in Cyberpunk movies and games. This is also the most notable highlight in the design of the 7Hz Sevenhertz 71. To increase brand recognition, the 7Hz logo is printed on both the body and the Type-C jack. There will only be 1 output on 7Hz 71 which is the 3.5mm Single-Ended output.
Outstanding features and technology
As a cheap product, the decoding ability of 7Hz Sevenhertz 71 is quite impressive. Using the AK4377 DAC chip, the DAC/AMP easily handles PCM music files with a maximum resolution of 32bit/384kHz and DSD128 (DoP). According to the parameters recorded on the card that comes with the DAC/AMP, the total harmonic distortion index of the 7Hz 71 is only 0.0004%.
The pulling power on the 3.5mm port will be at 70mW@32Ohm, so the 7Hz 71 is completely powerful enough to coordinate with the majority of headphone models in the entry and mid-range segments. The plug-and-play protocol allows the DAC/AMP to connect directly to any source device without having to install any additional drivers. Note, that to be able to connect to laptops, PCs, or iOS devices, users must purchase an external connection adapter.
The cable section on the 7Hz 71 seems simple at first glance, but hidden inside are 36 small wire cores made of silver-plated OCC copper for extremely effective signal transmission. The wire cores are woven entirely by hand so they are highly durable.
Sound quality
7Hz Sevenhertz 71 is a DAC/AMP with neutral, realistic, and natural sound quality. This is quite understandable because these are the familiar sound characteristics of the AKM AK4377 chip. Possessing a neutral sound quality also means that 7Hz 71 will not overemphasize any specific sound range. This means that any headphones when paired with 7Hz 71 will not change the sound color. This is a huge plus for the cheap 7Hz DAC/AMP.
However, if you pay close attention, you will be able to notice a slight difference between plugging in and pairing with 7Hz 71. When paired with 7Hz 71, in addition to the volume becoming larger, the bass range will be slightly increase in speed, and the extension and texture of the bass will also be slightly improved. With the treble range, the level of detail and sharpness of the treble will depend on the paired headset. The mid-range is similar.
Technically, the most outstanding factor of the 7Hz Sevenhertz 71 is the spaciousness of the soundstage. Besides the width, the depth of the soundstage is also very impressive. Next is speed and flexibility, efficiency when handling highly complex and fast-paced music. Another plus point for 7Hz 71 is that it always keeps the resolution at a high level. The proof is that the small details in the song (such as clapping, whistling, etc.) are described very clearly.
In addition to the open soundstage, the 7Hz 71 also provides sharp sound imaging and quite good spatial positioning capabilities. Not only that, the dynamics of sound and the ability to transition between sound bands are implemented very well and effectively by the AK4377 chip on 7Hz 71. Negative phenomena such as background noise, crackling, etc. do not occur even when you pair 7Hz 71 with highly sensitive headphones.
Although there are still some disadvantages such as the non-detachable cable, no hard keys to adjust the volume, and lack of advanced features, in short, the 7Hz Sevenhertz 71 has neutral sound quality, clean background, Supports decoding of many high-quality music formats, eye-catching design, … still a quality DAC/AMP at a price range of less than $45.
where can you get a 7Hz Sevenhertz 71 online
7HZ Sevenhertz 71 USB DAC AMP, USB-C to 3.5mm Audio Cable Headphone Amplifier: Buy it now