Markertek - The Future of Broadcast Supply

Call 800-522-2025
M-F 8:30am - 7pm EST

Free Shipping Promo Box

FREE SHIPPING No Minimum Order!

SHOP MARKERTEK EVERYDAY for all of your needs. Free shipping on almost every order placed on our website.
Special order & oversized freight intensive items ship at an additional cost. Continental US orders only.
Ask about our new Economy International Shipping Options.

Secure LoginClose X

Returning Markertek Customers

New Markertek Customers

Why Create an Account?

Creating a Markertek account now will save you time on future orders. You'll have full access to your order history and a personalized shopping experience.

RDL FP-MX4 4 Channel Audio Mixer - Microphone or Line Input and Output
    Questions? Ask a Markertek Expert:
    800-522-2025 Email

    RDL FP-MX4 4 Channel Audio Mixer - Microphone or Line Input and Output

    Manufacturer: Radio Design Labs

    Item #: FP-MX4   •   MFG #: FP-MX4


    List Price:$472.00
    Our Price:$339.95

    free ship
    Availability: Usually ships in 3-10 business days
    This item is currently out of stock and will ship the minute we receive it – normally 3-10 business days. Need it sooner? Call 800-522-2025 and we'll make it happen,or email Customer Service for expedited delivery options. Certain Non-Stock Items Valued over $50.00 may Ship FREE UPS GROUND in the Continental US. Multiple quantities of the same non-Stock Item Valued below $50.00 may be ordered to meet the $50 minimum order requirement to qualify for Free UPS Ground Freight. This offer does not apply to certain freight-intensive or hazardous items. Certain restrictions may apply.



      Required Accessories

      The RDL FP‑MX4 is a single‑channel audio mixing module featuring four identical inputs. Each input accepts either a mic or line level source. The output section provides four mixing potentiometers corresponding to the four inputs. The output section provides both a balanced line (+4 dBu) and balanced microphone level (‑45 dBu) output. Both outputs may be used at the same time. The four mixing potentiometers are intended to be set at installation or to be adjusted occasionally. Levels may be adjusted at the mixer using the RDL dual‑LED VU meter which displays the mixer output level.

      Required Power Supply RDL PS24V Sold Separately

      • Features

        • Four Channel Audio Mixer
        • Balanced Microphone and Line Inputs
        • Balanced Microphone and Line Outputs
        • Switch‑Selectable 24 V Mic Phantom
        • Three Switch‑Selectable Mic Gain Ranges
        • Studio‑Quality, Low‑Noise Performance
        • Convenience of RDL® FLAT‑PAKs™
      • Specifications

        • Microphone Inputs (4): 2 kΩ balanced, switchable 24 V phantom (IEC 1938: 1996‑12)
        • Microphone Input Level: Switch selectable ranges: ‑30 to ‑40 dBu, ‑40 to ‑50 dBu, < ‑50 dBu
        • Line Inputs (4): +4 dBu, 10 kΩ balanced (or unbalanced)

        • Mic: Off to 65 dB gain (adjustable each input)
        • Line: Off to 6 dB gain (adjustable each input)

          Frequency Response:
        • Mic: 10 Hz to 30 kHz (+/‑ 0.25 dB)
        • Line: 10 Hz to 45 kHz (+/‑ 0.25 dB)

        • Mic: < 0.012%
        • Line: < 0.004%

        • Residual Noise (below +4dBu output): Note, (A) = A‑Weighted

          Unity Gain:
        • 4 Line level sources
        • < ‑84 dB (wideband)

          40dB Gain:
        • Mic: ‑90 dB; All 4 mic level sources:
        • < ‑82 dB (wideband); < ‑84 dB (A)

          50dB Gain:
        • Mic: ‑86 dB; All 4 mic level sources:
        • < ‑72 dB (wideband); < ‑76 dB (A)

          60dB Gain:
        • Mic: ‑80 dB; All 4 mic level sources:
        • < ‑65 dB (wideband); < ‑67 dB (A)

          Outputs (2):
        • Line: +4 dBu 150 Ω balanced
        • Mic: ‑45 dBu 150 Ω balanced

        • Indicators (2): Dual‑LED VU meter (line‑level output)

        • Power Requirement: GROUND‑REFERENCED, 24 Vdc @ 160 mA

          Overall Dimensions:
        • Height: 1.42 in. 3.61 cm
        • Width: 3.25 in. 1.42 in.
        • Length: 8.14 in. 1.42 in.

        • Ambient Operating Environment: 0° C to 50° C

      Add Accessories for your FP-MX4:



      Continue Shopping View Cart