{"product_id":"spl-pq-parametric-eq","title":"SPL PQ - Parametric EQ","description":"\u003ch2\u003eSPL PQ - Parametric EQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThe \u003cstrong\u003eSPL PQ\u003c\/strong\u003e is a dual-mono stereo mastering equaliser built around ten fully parametric filter bands, five per channel, and powered by SPL's proprietary 120V technology. Originally developed alongside the legendary SPL MMC1 Mastering Console for Galaxy Studios, the PQ has since established itself as one of the most respected and versatile parametric equalisers in professional mastering. Its combination of surgical precision and musical flexibility, delivered through a design that operates at ±60V internally, has earned it a loyal following among some of the world's most discerning mastering engineers.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eWhat makes the PQ genuinely distinctive is the ability to switch each of its ten filter bands independently between Constant Q and Proportional Q behaviour. In Constant Q mode, the amplitude remains fixed regardless of the selected bandwidth, ideal for isolating and eliminating problematic frequencies with accuracy. In Proportional Q mode, the amplitude scales with bandwidth: narrower settings produce higher gain, wider settings produce gentler, more diffuse curves that interact naturally with programme material. At the narrowest bandwidth the maximum cut\/boost is ±20dB; at the widest setting this reduces to approximately ±2.8dB, providing an inherently musical taper that makes broad tonal shaping feel intuitive rather than clinical.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eEach filter band offers up to ±20dB of cut or boost, with an additional 1\/4 Gain mode that reduces the effective range to ±5dB, useful when only the most delicate refinements are needed. All five frequency bands overlap generously across the spectrum (LF: 10Hz–330Hz; LMF: 33Hz–1kHz; MF: 128Hz–4.1kHz; MHF: 310Hz–10.2kHz; HF: 760Hz–24kHz), allowing adjacent bands to address the same frequency from different angles and giving the engineer complete control over the shape of any correction or enhancement.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThe centre section introduces two particularly practical features. Auto Bypass allows the unit to switch automatically between the processed and bypassed signal at an adjustable interval, removing the engineer from the stereo centre during comparison and enabling a more objective evaluation without the distraction of manual switching. The Link function joins both channel strips together so that activating or changing a filter band's mode on one side simultaneously affects the other, essential for stereo mastering work where consistency between left and right must be maintained. Uniquely, the controlling channel can be reassigned to either side, allowing the workflow to be adapted to personal preference.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eAll controls are implemented with 41-step detented potentiometers, giving the PQ excellent recall accuracy across both channels, a critical requirement in professional mastering environments.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThe 120V technology at the heart of the PQ operates at ±60V internally via SPL's proprietary SUPRA operational amplifiers. Where most audio devices work at ±15V and clip at around +21.5dBu, the PQ handles input and output levels up to +32.5dBu, giving it 12dB more headroom. At these operating conditions all components function comfortably within their optimal range, contributing to the notably low THD figure of 0.0005% and a dynamic range of 135dB. The result is an equaliser that is both technically exemplary and sonically transparent: rich in detail, free from harshness, and exceptionally easy to work with over long sessions. Power is provided by an internal linear supply with a shielded toroidal transformer, and the unit is manufactured entirely at SPL's facility in Niederkrüchten, Germany.\u003c\/p\u003e\n\u003ch2 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003eSPL PQ Key Features:\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eDual-mono stereo mastering parametric equalizer, processing two independent mono signals simultaneously or a stereo left\/right programme\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e10 fully parametric filter bands, 5 per channel (LF, LMF, MF, MHF, HF)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eEach band independently switchable between Constant Q and Proportional Q mode\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eConstant Q: fixed amplitude regardless of bandwidth, ideal for problem frequency removal\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eProportional Q: amplitude scales with bandwidth (±20dB at narrowest; ±2.8dB at widest) for musical, natural tonal shaping\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCut\/boost range of ±20dB per band; 1\/4 Gain switch reduces range to ±5dB for fine adjustments\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eGenerous frequency overlap between bands: LF 10Hz–330Hz \/ LMF 33Hz–1kHz \/ MF 128Hz–4.1kHz \/ MHF 310Hz–10.2kHz \/ HF 760Hz–24kHz\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eAuto Bypass function with adjustable switching interval for objective A\/B comparison without manual intervention\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eLink mode joins controls across both channels simultaneously; controlling channel assignable to either side\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eIndividual On\/Off switching per band and per channel\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eAll controls implemented with 41-step detented potentiometers for reliable recall\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSPL 120V technology operating at ±60V internally via proprietary SUPRA op-amps\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e+32.5dBu maximum input\/output level, giving 12dB more headroom than standard ±15V designs\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e135dB dynamic range; THD 0.0005% at +30dBu\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eInternal linear power supply with shielded toroidal transformer\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eElectronically balanced XLR inputs and outputs\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eManufactured in Niederkrüchten, Germany\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003eSPL PQ Specifications:\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eAnalogue Inputs \u0026amp; Outputs (XLR balanced)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eMaximum Input\/Output Level: 32.5 dBu\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eInput Impedance: 20 kΩ\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eOutput Impedance: 75 Ω\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCommon Mode Rejection: -82 dBu\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eFrequency Range (-3dB): 10 Hz – 100 kHz\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eTHD \u0026amp; N (+30dBu, 1kHz): 0.0005%\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eNoise (A-weighted): -94.3 dBu\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eDynamic Range: 135 dB\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003ePower Supply\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eInternal operating voltage (audio): ±60V DC\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eRelay\/LED voltage: +12V DC\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eMains: 230V AC \/ 50Hz or 115V AC \/ 60Hz (selectable)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eFuse (230V): T 3.15A; Fuse (115V): T 6.3A\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003ePower consumption: max. 100 VA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003ePhysical\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eDimensions (W x H x D): 482 x 177 x 300 mm \/ 19 x 6.97 x 11.8 inches\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eUnit weight: 15.2 kg \/ 33.51 lbs\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eShipping weight (inc. packaging): 17.8 kg \/ 39.24 lbs\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPL","offers":[{"title":"Default Title","offer_id":58137516343670,"sku":"SSPLPQ","price":5086.67,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0256\/2988\/4462\/files\/0001_SPL-PQ-Front.jpg?v=1782224565","url":"https:\/\/studiocare.com\/products\/spl-pq-parametric-eq","provider":"Studiocare","version":"1.0","type":"link"}