{"id":7229,"date":"2026-06-08T02:00:48","date_gmt":"2026-06-08T00:00:48","guid":{"rendered":"https:\/\/soundsystems.proel.com\/prodotto\/hpamp104-4-ch-headphone-amplifier\/"},"modified":"2026-06-08T03:00:58","modified_gmt":"2026-06-08T01:00:58","slug":"hpamp104-4-ch-headphone-amplifier","status":"publish","type":"product","link":"https:\/\/soundsystems.proel.com\/en\/prodotto\/hpamp104-4-ch-headphone-amplifier\/","title":{"rendered":"4-CH Headphone Amplifier"},"content":{"rendered":"\n\n\n
\n\n\n\n\t\t\t\t<\/colgroup>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Input Section<\/strong><\/td>\n\u00a0<\/td>\n<\/tr>\n
Inputs<\/td>\n1 stereo<\/td>\n<\/tr>\n
Input Impedance<\/td>\n500 Kohm<\/td>\n<\/tr>\n
Max Input Level<\/td>\n+15 dBu<\/td>\n<\/tr>\n
Connectors\u00a0<\/td>\n1\/4″ jack stereo, 2 x RCA<\/td>\n<\/tr>\n
Output Section<\/strong><\/td>\n\u00a0<\/td>\n<\/tr>\n
Outputs<\/td>\n4 stereo<\/td>\n<\/tr>\n
Maximum output<\/td>\n(2x) 45mW @ 100 ohm (each)<\/td>\n<\/tr>\n
Load Impedance<\/td>\nminimum 16 ohm per channel<\/td>\n<\/tr>\n
Max gain<\/td>\n+20 dB each channel<\/td>\n<\/tr>\n
Connector\u00a0<\/td>\n1\/4″ jack stereo (each output)<\/td>\n<\/tr>\n
System Performance\u00a0<\/strong><\/td>\n\u00a0<\/td>\n<\/tr>\n
Distortion (THD)<\/td>\n0.02 %<\/td>\n<\/tr>\n
Noise\u00a0<\/td>\n< -98 dBu unweighted<\/td>\n<\/tr>\n
Frequency Response\u00a0<\/td>\n20 Hz – 20 KHz (-3 dB)<\/td>\n<\/tr>\n
General\u00a0<\/strong><\/td>\n\u00a0<\/td>\n<\/tr>\n
Controls<\/td>\nOUTPUT LEVEL, INPUT STEREO\/MONO<\/td>\n<\/tr>\n
Indicators<\/td>\nPower ON<\/td>\n<\/tr>\n
Power supply<\/td>\n12-18 VDC (adapter included)<\/td>\n<\/tr>\n
Dimensions (W x H x D)\u00a0<\/td>\n152 x 50 x 72 mm<\/td>\n<\/tr>\n
Weight<\/td>\n0,8 Kg<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

The 100 Series is a range of D.I. Boxes and Headphone Amps designed to complement audio systems in stage applications, recording studios and fixed installations. Hosted in a stylish extruded and stackable aluminum shell or in a sturdy metal chassis, the 100 Series products are meant to deliver sound quality, versatility and stage-proof reliability in a very affordable package.<\/p>\n

    \n
  • Very compact and portable package<\/li>\n
  • \u00bc\u201d JACK + RCA stereo\/mono input<\/li>\n
  • 4 x \u00bc\u201d JACK stereo headphone outputs with individual level controls<\/li>\n
  • +22dB max output level (per channel)<\/li>\n
  • 10 ohm minimum output impedance (per channel)<\/li>\n
  • Powered by DC adaptor (included)<\/li>\n<\/ul>\n","protected":false},"featured_media":9187,"template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[330,492,113,135],"product_tag":[138],"class_list":["post-7229","product","type-product","status-publish","has-post-thumbnail","product_cat-100-series-en","product_cat-legacy-stage-gear-en","product_cat-sound-systems-en","product_cat-stage-gear-en","product_tag-legacy-en","first","instock","product-type-simple"],"acf":[],"yoast_head":"\n4-CH Headphone Amplifier - Sound System PROEL<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/soundsystems.proel.com\/en\/prodotto\/hpamp104-4-ch-headphone-amplifier\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"4-CH Headphone Amplifier - Sound System PROEL\" \/>\n<meta property=\"og:description\" content=\"The 100 Series is a range of D.I. Boxes and Headphone Amps designed to complement audio systems in stage applications, recording studios and fixed installations. Hosted in a stylish extruded and stackable aluminum shell or in a sturdy metal chassis, the 100 Series products are meant to deliver sound quality, versatility and stage-proof reliability in a very affordable package. Very compact and portable package \u00bc\u201d JACK + RCA stereo\/mono input 4 x \u00bc\u201d JACK stereo headphone outputs with individual level controls +22dB max output level (per channel) 10 ohm minimum output impedance (per channel) Powered by DC adaptor (included)\" \/>\n<meta property=\"og:url\" content=\"https:\/\/soundsystems.proel.com\/en\/prodotto\/hpamp104-4-ch-headphone-amplifier\/\" \/>\n<meta property=\"og:site_name\" content=\"Sound System PROEL\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/proel\" \/>\n<meta property=\"article:modified_time\" content=\"2026-06-08T01:00:58+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/soundsystems.proel.com\/wp-content\/uploads\/2026\/02\/tmp_safe_e32d91433e9cd91abd3890015850e1f2.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"1200\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/soundsystems.proel.com\\\/en\\\/prodotto\\\/hpamp104-4-ch-headphone-amplifier\\\/\",\"url\":\"https:\\\/\\\/soundsystems.proel.com\\\/en\\\/prodotto\\\/hpamp104-4-ch-headphone-amplifier\\\/\",\"name\":\"4-CH Headphone Amplifier - 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