{"id":1318980,"date":"2026-02-16T11:00:36","date_gmt":"2026-02-16T09:00:36","guid":{"rendered":"https:\/\/digibit.ee\/tooted\/maaratlemata\/pro-ject-head-box-e-kuulokevahvistin-musta\/"},"modified":"2026-06-11T23:07:57","modified_gmt":"2026-06-11T20:07:57","slug":"pro-ject-head-box-e-kuulokevahvistin-musta","status":"publish","type":"product","link":"https:\/\/digibit.ee\/en\/product\/pro-ject-head-box-e-kuulokevahvistin-musta\/","title":{"rendered":"Pro-Ject Head Box E headphone amplifier, black"},"content":{"rendered":"<p>Head Box E is a powerful standalone headphone amplifier designed to unlock the full potential of modern headphones when used with devices like laptops or smartphones. It delivers enough power to improve sound quality significantly, featuring one RCA input for your preferred audio source and two headphone outputs on the front panel: a 6.35 mm jack for hi-fi headphones and a 3.5 mm jack for more common models. Both outputs can be used simultaneously, making it easy to share your listening experience.<\/p>\n<h3>Powerful Dedicated Headphone Amplifier<\/h3>\n<p>With its unusually high output power, Head Box E provides clear, dynamic sound and enough volume even for headphones that are hard to drive. It offers a rich and full audio experience with plenty of detail and transparency.<\/p>\n<p>This amplifier uses a fully discrete design rather than integrated circuits, ensuring superior performance and reliability. The carefully engineered circuitry not only delivers excellent power and clarity but also extends the product\u2019s lifespan by allowing easy maintenance and repairs over time.<\/p>\n<p>Only high-quality components are used in the construction of this unique amplifier. The entire chassis is made of metal to protect against electromagnetic interference and vibrations that could affect sound quality. The front panel and controls are crafted from finely machined aluminum for durability and a refined look.<\/p>\n<h3>Features:<\/h3>\n<ul>\n<li>Compatible upgrade power supplies: Accu Box S2, Accu Box S2 USB<\/li>\n<li>Suitable for demanding headphones<\/li>\n<li>6.35 mm and 3.5 mm headphone outputs<\/li>\n<li>Bypass RCA loop output<\/li>\n<li>Very low distortion<\/li>\n<li>Low-noise components<\/li>\n<li>Compact size<\/li>\n<li>Both outputs usable simultaneously<\/li>\n<li>Sturdy full-metal enclosure<\/li>\n<li>Output power: 665 mW (32 ohms)<\/li>\n<li>Signal-to-noise ratio: -105 dBV<\/li>\n<li>THD + N &lt; 0.005 %<\/li>\n<li>Gain: 11 dB<\/li>\n<li>Channel separation: 65 dB<\/li>\n<li>Frequency response: 20 Hz \u2013 80 kHz (\u00b10.02 dB)<\/li>\n<li>Analog inputs: 1 pair RCA\/Cinch<\/li>\n<li>Output impedance (headphone amplifier): &lt;1 ohm<\/li>\n<li>Analog loop output: 1 pair RCA\/Cinch<\/li>\n<li>Power supply: 5 V \/ 0.5 A DC<\/li>\n<li>Power consumption in standby: &lt; 0.5 W<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<ul>\n<li>Output power 665 mW (at 32 ohms)<\/li>\n<li>Signal-to-noise ratio -105 dBV<\/li>\n<li>THD +N &lt; 0.005%<\/li>\n<li>Frequency response 20 Hz &#8211; 80 kHz (\u00b10.02 dB)<\/li>\n<li>Dimensions W x H x D 103 x 37 x 120 mm<\/li>\n<\/ul>\n","protected":false},"featured_media":999999999,"template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[36973,36715,36727,37992],"product_tag":[],"class_list":["post-1318980","product","type-product","status-publish","has-post-thumbnail","product_cat-authorities-en","product_cat-audio-and-hi-fi-en","product_cat-audio-ja-video-audio-and-video-en","product_cat-headphone-amplifiers-en","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"acf":[],"_links":{"self":[{"href":"https:\/\/digibit.ee\/en\/wp-json\/wp\/v2\/product\/1318980","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/digibit.ee\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/digibit.ee\/en\/wp-json\/wp\/v2\/types\/product"}],"wp:attachment":[{"href":"https:\/\/digibit.ee\/en\/wp-json\/wp\/v2\/media?parent=1318980"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/digibit.ee\/en\/wp-json\/wp\/v2\/product_brand?post=1318980"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/digibit.ee\/en\/wp-json\/wp\/v2\/product_cat?post=1318980"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/digibit.ee\/en\/wp-json\/wp\/v2\/product_tag?post=1318980"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}