{"product_id":"rdl-fp-mx4","title":"RDL FP-MX4 – 4-Channel Mic\/Line Audio Mixer","description":"\u003ch2\u003eWhat is the RDL FP-MX4?\u003c\/h2\u003e\u003cp\u003eThe RDL FP-MX4 is a 4-channel audio mixer that combines microphone and line-level sources at preset levels in a compact FLAT-PAK module. Each input is switch-selectable for line level, mic level, or mic with 24 V phantom power, and accepts balanced or unbalanced wiring. Simultaneous balanced line and mic-level outputs let the mix feed an amplifier, recorder or another mixer. It is well suited to conference rooms, lecterns and small sound reinforcement systems that need a fixed, installer-set mix.\u003c\/p\u003e\u003ch2\u003eHow does it work?\u003c\/h2\u003e\u003cp\u003e\u003cimg src=\"https:\/\/rdlnet.com\/wp-content\/uploads\/2024\/01\/fp-mx4.jpg\" alt=\"RDL FP-MX4 four channel mic and line audio mixer\" style=\"max-width:100%;height:auto\" loading=\"lazy\"\u003e\u003c\/p\u003e\u003cp\u003eEach input section provides a detachable terminal block, a source switch (LINE, MIC or MICPH) and a MIC GAIN switch with LOW, MED and HIGH ranges covering 35 dB to 65 dB. Because each channel has its own switches, any combination of four sources can be used at the same time. The mic inputs use RDL's low-noise discrete preamplifier stage for performance usually reserved for studio equipment. Four mixing potentiometers set the level of each input and can be adjusted by screwdriver or by hand, and unused channels can be turned fully off. The output section provides a balanced +4 dBu line output and a balanced -45 dBu mic-level output, and both can be used at once. A dual-LED VU meter simplifies level setting, with the green LED reaching full intensity at +4 dBu and the red LED lighting above that level. Power connects through barrier terminals or a dc jack, and a second dc jack passes power to additional FLAT-PAK modules. The low-profile chassis mounts on rack sides or rack rails with the \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-fp-rra\"\u003eRDL FP-RRA\u003c\/a\u003e, and connector placement allows high-density mounting against flat surfaces. RDL recommends the PS-24AS power supply for the USA or the \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-ps-24ax\"\u003ePS-24AX\u003c\/a\u003e for international installations; the supply is not included.\u003c\/p\u003e\u003ch2\u003eWhat are the key features?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour mic\/line inputs\u003c\/strong\u003e — Each input switches between line, mic, or mic with 24 V phantom, wired balanced or unbalanced.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree mic gain ranges\u003c\/strong\u003e — LOW, MED and HIGH ranges span 35 dB to 65 dB to match a wide range of microphones.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual balanced outputs\u003c\/strong\u003e — Line (+4 dBu) and mic (-45 dBu) outputs are available at the same time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-noise preamps\u003c\/strong\u003e — RDL discrete mic preamplifiers deliver studio-quality noise performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVU output meter\u003c\/strong\u003e — A dual-LED meter with standard VU ballistics makes level setting quick and accurate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFLAT-PAK format\u003c\/strong\u003e — The compact module fits confined spaces and shares power with other FLAT-PAK modules.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhere is it typically used?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eConference room\u003c\/li\u003e\n\u003cli\u003eBoardroom\u003c\/li\u003e\n\u003cli\u003eTraining room\u003c\/li\u003e\n\u003cli\u003eHouse of worship\u003c\/li\u003e\n\u003cli\u003eMulti-purpose room\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cdiv style=\"overflow-x:auto;-webkit-overflow-scrolling:touch\"\u003e\u003ctable style=\"border-collapse:collapse;width:100%;min-width:300px;table-layout:fixed\"\u003e\n\u003ccolgroup\u003e\n\u003ccol style=\"width:40%\"\u003e\n\u003ccol style=\"width:60%\"\u003e\n\u003c\/colgroup\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eFP-MX4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eMicrophone Inputs (4)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e2 kΩ balanced, switchable 24 V phantom (IEC 61938: 2013)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eMicrophone Input Level\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eSwitch selectable ranges: -30 to -40 dBu, -40 to -50 dBu, \u0026lt; -50 dBu\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eLine Inputs (4)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e10 kΩ balanced (may be wired unbalanced)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eLine Input Level\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e+4 dBu\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eGain Adjustments (4)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eMic: Off to 65 dB gain (max. gain range); line: Off to 6 dB gain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eFrequency Response – Mic\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e10 Hz to 30 kHz (± 0.25 dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eFrequency Response – Line\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e10 Hz to 45 kHz (± 0.25 dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eTHD+N – Mic\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e\u0026lt; 0.012%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eTHD+N – Line\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e\u0026lt; 0.004%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eAmbient Operating Environment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e32°F (0°C) to 122°F (50°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eResidual Noise (below +4dBu output)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e4 line level sources (unity gain): \u0026lt; -84 dB (wideband)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003e40dB Gain\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eMic: -90 dB; all 4 mic level sources: \u0026lt; -82 dB (wideband); \u0026lt; -84 dB (“A” weighted)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003e50dB Gain\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eMic: -86 dB; all 4 mic level sources: \u0026lt; -72 dB (wideband); \u0026lt; -76 dB (“A” weighted)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003e60dB Gain\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eMic: -80 dB; all 4 mic level sources: \u0026lt; -65 dB (wideband); \u0026lt; -67 dB (“A” weighted)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eOutputs (2)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eLine: +4 dBu 150 Ω balanced; mic: -45 dBu 150 Ω balanced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eIndicators (2)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eDual-LED VU meter (line-level output)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003ePower Requirement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e24 Vdc @ 160 mA, Ground-referenced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eOverall Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eHeight: 1.42 in. 3.61 cm, Width: 3.25 in. 8.26 cm, Length: 8.14 in. 20.68 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eCan the FP-MX4 mix mics and line sources at the same time?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eYes. Each input has its own source and gain switches, so any combination of four mic and line sources can be used simultaneously.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eDoes it provide phantom power?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eYes. Each input can be set to MICPH for 24 V phantom power (IEC 61938: 2013).\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eAre the levels user-adjustable?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eThe four mixing potentiometers are intended to be set at installation or adjusted occasionally, by screwdriver or by hand.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eWhat power does it need?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003e24 Vdc at 160 mA, ground-referenced. RDL recommends the PS-24AS power supply for the USA or the \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-ps-24ax\"\u003ePS-24AX\u003c\/a\u003e for international installations; the supply is not included.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eHow is it mounted?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eRDL lists the \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-fp-hra\"\u003eFP-HRA 10.4\" rack mount\u003c\/a\u003e, \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-fp-rra\"\u003eFP-RRA 19\" rack adapter\u003c\/a\u003e, FP-RRAH hinged adapter, \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-fp-rrb1\"\u003eFP-RRB1 rear rail kit\u003c\/a\u003e and \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-dra-35f\"\u003eDRA-35F DIN rail adapter\u003c\/a\u003e as mounting accessories.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eWhat warranty does the FP-MX4 carry?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eThis product is covered by a 7-year RDL warranty. For warranty claims, RMAs or support, contact Creation Networks at (888) 230-3661 or sales@creationnetworks.net.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eCan Creation Networks help integrate the FP-MX4?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eYes. Creation Networks supports system design, equipment selection and installation planning for RDL products nationwide. Call (888) 230-3661 for a quote or technical help.\u003c\/p\u003e\u003c\/details\u003e","brand":"RDL","offers":[{"title":"Default Title","offer_id":68025746882796,"sku":"FP-MX4","price":514.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0603\/7982\/4364\/files\/fp-mx4.jpg?v=1793583138","url":"https:\/\/creationnetworks.net\/products\/rdl-fp-mx4","provider":"Creation Networks","version":"1.0","type":"link"}