{"id":1368387,"date":"2026-04-06T02:04:27","date_gmt":"2026-04-05T23:04:27","guid":{"rendered":"https:\/\/digibit.ee\/?post_type=product&#038;p=1368387"},"modified":"2026-07-13T06:14:28","modified_gmt":"2026-07-13T03:14:28","slug":"pro-ject-head-box-s3-b-headphone-amplifier-black","status":"publish","type":"product","link":"https:\/\/digibit.ee\/en\/product\/pro-ject-head-box-s3-b-headphone-amplifier-black\/","title":{"rendered":"Pro-Ject Head Box S3 B Headphone Amplifier, Black"},"content":{"rendered":"<p>The Pro-Ject Head Box S3 B is a headphone amplifier that offers a balanced combination of power and sound quality. Thanks to its fully balanced topology, it minimizes interference and maximizes channel separation, making it suitable for demanding listeners. Versatile headphone connections support both balanced and unbalanced headphones, and the device is designed to integrate easily with various audio systems.<\/p>\n<h3>Powerful and Clear Sound<\/h3>\n<p>The Head Box S3 B delivers maximum power for different headphone impedances, ensuring sufficient strength for both sensitive and demanding headphones. Low distortion and a high signal-to-noise ratio guarantee clear and pure sound quality without interference.<\/p>\n<h3>Versatile Connections<\/h3>\n<p>The headphone amplifier features four different headphone outputs: 3.5 mm and 6.3 mm unbalanced, as well as 4.4 mm Pentaconn and 4-pin balanced XLR outputs. Additionally, the device includes both RCA and XLR analog inputs and an RCA loop output, allowing flexible connectivity to various devices.<\/p>\n<h3>High-Quality Construction<\/h3>\n<p>The amplifier\u2019s enclosure is made of full aluminum, providing a durable and stable protective structure. The device is manufactured in Europe by experienced professionals, ensuring long-lasting and reliable use.<\/p>\n<h3>Easy to Use and Suitable for Various Systems<\/h3>\n<p>The Head Box S3 B is suitable for audiophiles as well as demanding users who want clear and precise sound quality. It works well with both desktop computers and hi-fi equipment, offering flexibility and performance for different purposes.<\/p>\n<h3>Features<\/h3>\n<ul>\n<li>Maximum power: 480 mW \/ 8 ohms, 680 mW \/ 16 ohms, 820 mW \/ 32 ohms, 320 mW \/ 300 ohms<\/li>\n<li>Headphone outputs: 3.5 mm, 6.3 mm, 4.4 mm balanced Pentaconn, 4-pin balanced XLR<\/li>\n<li>Signal-to-noise ratio (SNR): &gt; 115 dB A-weighted at 1 kHz<\/li>\n<li>THD (total harmonic distortion): &lt; 0.002% at 1 kHz @ 500 mV input<\/li>\n<li>Crosstalk: &lt; -81 dB at 10 kHz<\/li>\n<li>Gain: 15 dB (RCA input) \/ 9 dB (XLR input)<\/li>\n<li>Frequency response: &lt; -0.25 dB 20 Hz\u201320 kHz<\/li>\n<li>Analog inputs: 1 pair RCA\/Cinch, 1 pair XLR<\/li>\n<li>Analog outputs (loop): 1 pair RCA<\/li>\n<li>Headphone impedance: minimum 8 ohms<\/li>\n<li>Power supply: 18 V \/ 1 A DC, 110\u2013240 V, 50\/60 Hz<\/li>\n<li>Power consumption in standby: &lt; 0.5 W<\/li>\n<li>Dimensions (W x H x D): 206 x 55 x 153 (170) mm<\/li>\n<li>Weight: 950 g without power supply<\/li>\n<\/ul>\n<ul><\/ul>\n","protected":false},"excerpt":{"rendered":"<ul>\n<li>Maximum power: 480 mW \/ 8 ohms, 680 mW \/ 16 ohms<\/li>\n<li>Maximum power: 820 mW at 32 ohms, 320 mW at 300 ohms<\/li>\n<li>SNR: &gt; 115 dB &quot;A&quot;-weighted at 1 kHz<\/li>\n<li>THD: &lt; 0.002% at 1 kHz @ 500 mV input<\/li>\n<\/ul>\n","protected":false},"featured_media":999999999,"template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[47402,47374,46035,46036,46049],"product_tag":[],"class_list":["post-1368387","product","type-product","status-publish","has-post-thumbnail","product_cat-amplifiers-and-receivers-en","product_cat-audio-equipment-and-musical-instruments-en","product_cat-audiotehnika-ja-muusikainstrumendid","product_cat-audiotehnika-ja-tarvikud","product_cat-voimendid-ja-ressiiverid","first","onbackorder","taxable","shipping-taxable","purchasable","product-type-simple"],"acf":[],"_links":{"self":[{"href":"https:\/\/digibit.ee\/en\/wp-json\/wp\/v2\/product\/1368387","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=1368387"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/digibit.ee\/en\/wp-json\/wp\/v2\/product_brand?post=1368387"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/digibit.ee\/en\/wp-json\/wp\/v2\/product_cat?post=1368387"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/digibit.ee\/en\/wp-json\/wp\/v2\/product_tag?post=1368387"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}