{"title":"PS Audio","description":"\u003cp\u003ePS Audio was founded in 1973 and designs and builds its products in Boulder, Colorado, at the foot of the Rocky Mountains. Its range spans power regenerators and conditioners, DACs and amplifiers.\u003c\/p\u003e","products":[{"product_id":"preowned-ps-audio-bhk-signature-preamplifier","title":"PreOwned PS Audio BHK Signature Preamplifier 110V","description":"\u003ch2\u003ePS Audio BHK Signature Preamplifier - Pre-Owned\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eOriginal Box not available. Comes only with the Amplifier and the 110V Transformer.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCondition:\u003c\/strong\u003e Pre-owned unit sold as-is. Test in our showroom before purchase. No refunds on pre-owned units.\u003c\/p\u003e\n\u003ch3\u003eDesign Philosophy\u003c\/h3\u003e\n\u003cp\u003eThe BHK Signature Preamplifier features two 12AU7 dual triode vacuum tubes in the input stage that act as a zero feedback balanced input amplification pair. A combination of an input stepped attenuator, built around the highest quality passive components for coarse volume adjustments, coupled with controlling the actual gain of the vacuum tube for finer steps, delivers the most sonically transparent level control. The output stage is a high-bias class A MOSFET design that is unaffected by cable and power amplifier interface challenges.\u003c\/p\u003e\n\u003ch3\u003eApplication\u003c\/h3\u003e\n\u003cp\u003ePreamplifiers play a critical role in any separates audio system, strategically positioned between sources of music—CD players, phono preamps, DACs, tape recorders and tuners—and your power amplifier. The BHK Signature Preamplifier features 5 identical balanced and single ended inputs, and converts all input signals into a balanced signal for the lowest possible distortion. It can be used in a two-channel audio system or as part of a home theater system. The high-bias Class A MOSFET output stage ensures unmatched performance with any cable and amplifier interface.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eValue\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003ePhysical\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnit Weight\u003c\/td\u003e\n\u003ctd\u003e9.97 kg (22 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e43 × 36 × 10 cm (17\" × 14\" × 4\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Weight\u003c\/td\u003e\n\u003ctd\u003e14 kg (31 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e61 × 52 × 25 cm (24\" × 20.5\" × 10\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003ePower Requirements\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Power\u003c\/td\u003e\n\u003ctd\u003eModel specific 100VAC, 120VAC, or 230VAC 50\/60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e60W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eAudio Inputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoaxial RCA (Single Ended)\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eXLR (Balanced)\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Impedance (Unbalanced)\u003c\/td\u003e\n\u003ctd\u003e33kΩ minimum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Impedance (Balanced)\u003c\/td\u003e\n\u003ctd\u003e66kΩ minimum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensitivity\u003c\/td\u003e\n\u003ctd\u003eUnbalanced: 1.3V\/33kΩ\u003cbr\u003eBalanced: 1.3V\/66kΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eAudio Outputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoaxial RCA (Single Ended)\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eXLR (Balanced)\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Level\u003c\/td\u003e\n\u003ctd\u003e4.0 Vrms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Impedance\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;100Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Response (20-20kHz)\u003c\/td\u003e\n\u003ctd\u003e+\/- 0.1dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTHD \u0026amp; IM @ 1kHz (Full Scale)\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.03%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandwidth\u003c\/td\u003e\n\u003ctd\u003e-3dB 0.1Hz - 200kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eDC Triggers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e+12V Triggers\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eHeadphone Performance\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Power (300Ω)\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;200mW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Power (16Ω)\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;4.0 Watts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eS\/N Ratio\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;90dB (1kHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTHD \u0026amp; IM (1 volt out)\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.02%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Impedance\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.5Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDual 12AU7 vacuum tube input stage with zero feedback\u003c\/li\u003e\n\u003cli\u003eHigh-quality stepped attenuator volume control\u003c\/li\u003e\n\u003cli\u003eHigh-bias Class A MOSFET output stage\u003c\/li\u003e\n\u003cli\u003e5 balanced (XLR) and 5 unbalanced (RCA) inputs\u003c\/li\u003e\n\u003cli\u003eConverts all inputs to balanced signal processing\u003c\/li\u003e\n\u003cli\u003ePowerful headphone amplifier (up to 4W into 16Ω)\u003c\/li\u003e\n\u003cli\u003e2 DC trigger outputs for system integration\u003c\/li\u003e\n\u003cli\u003eHome theater bypass capability\u003c\/li\u003e\n\u003cli\u003ePremium build quality with audiophile-grade components\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PS Audio","offers":[{"title":"Default Title","offer_id":42180503142494,"sku":null,"price":48990.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2577\/1494\/files\/BHK-Pre-Black-Front-scaled.webp?v=1791975040"}],"url":"https:\/\/www.ultrasound.co.za\/collections\/ps-audio.oembed","provider":"Ultra Sound \u0026 Vision","version":"1.0","type":"link"}