Radio Design Labs STP-1
Dual-Channel Universal Attenuator


Our Price: $60.88
List Price: $81.43
You save 25%! (Low Price Guarantee)
In Stock

Radio Design Labs' STP-1 is part of a group of products in the STICK-ON series, designed by Radio Design Labs. The durable bottom adhesive permits quick, permanent or removable mounting nearly anywhere or it may be used with RDL’s racking accessories. The STP-1 is a convenient attenuator pad that can be located at the precise location that attenuation is needed without the normal unsightly twisted-resistor pads that are all so common.

Whether you need to reduce the input level to a machine to improve headroom, feed a line level signal into a mic level input, or simply lower the level of an audio line to match your systems standard levels, the STP-1 is the simple and economic answer. Use the STP-1 combined with other RDL RACK-UP®, STICK-ON, TX™, or FLAT-PAK™ series products as part of a complete audio/video system.


  • To reduce audio feed
  • To feed audio into equipment
  • To preset audio levels
  • To precisely match audio levels
  • To prevent input overload
  • To increase audio input headroom
  • Two adjustable attenuators in one package


  • Permits precise calibration of all levels in your audio system
  • 2 attenuators provided in each STP-1
  • Multi-turn trimmers for precise adjustment
  • Very wide range of attenuation; from speaker level inputs to mic outputs
  • Operates with balanced or unbalanced inputs/outputs
  • No lugs required for reliable connections
  • Full operation in either high or low impedance circuits
  • Attenuator pads totally self-contained; no jumpers to select or resistors to attach
  • Quickly & efficiently attenuate any signal; cleanly, neatly, and with proper impedance match
  • Recessed adjustment discourages tampering


  • Circuit Type: Passive
  • Attenuation:
    • High Impedance Balanced Line:  Adjustable -1 dB to -85 dB
    • Low Impedance Balanced Line:  Adjustable -5 dB to -35 dB
    • High Impedance Unbalanced Line:  Adjustable -1 dB to -85 dB
  • Nominal Impedance: High Impedance 10 kohm; Low Impedance 600 ohm
  • Adjustment: Screwdriver trimming adjustment, 15 turns continuous
  • Circuit type: Passive modified (H) & (T) pads
  • Connections:
    • Terminal block accepts 14-30 gauge wire
    • No lugs required
    • Input/output connection legend located on STP-1
  • Maximum Signal Inputs:
    • High Impedance Balanced Line: +33 dB, 35 V RMS
    • Low Impedance Balanced Line: +27 dB; 18 V RMS
    • High Impedance Unbalanced Line:+35 dB, 45 V RMS
  • Reference Levels:
    • Line level is +10 dB to -10dB
    • Mic level is -45 dB to -65dB
    • 0 dB = 0.775 V RMS into specified load
Add to Cart

We're sorry, only of this item available

Call a Sales Pro at 800-356-5844 for more information

© 2016 Full Compass Systems, LTD  9770 Silicon Prairie Parkway, Madison, WI 53593  All rights reserved.

We are not responsible for typographical errors in pricing or product specification
inaccuracies in our catalog or web site. Prices are subject to change without notice.