Decora-Style Active Loudspeaker-Black-User Level Adjust

Ideal Use Cases

The RDL DB-PSP1 is designed for wall-mounted audio installations that require a compact Decora-style active loudspeaker with user-accessible level adjustment. Its black finish, ultra-compact enclosure, and front-panel volume knob make it appropriate for systems where the loudspeaker and gain control need to occupy minimal wall space. The input specifications support both professional balanced signals at +4 dBu nominal and unbalanced signals at -10 dBV nominal, allowing the model to integrate with either signal format.

Why Choose This Model

The DB-PSP1 combines the loudspeaker, a 2 W amplifier, a limiter, and a volume knob in one wall-mounted design. This integrated configuration reduces the number of separate audio components required at the speaker location while retaining direct user control over the output level. The single-turn, audio-taper gain adjustment is located on the front panel for convenient access. RDL specifies a maximum sound pressure level of 81 dB and a nominal frequency range of 150 Hz to 20 kHz.

Its compact dimensions are another defining characteristic. The unit measures 4.12 inches high by 1.72 inches wide by 2.64 inches deep, or 10.46 by 4.37 by 6.7 centimeters. These dimensions support the ultra-compact design described for the product without sacrificing the integrated amplifier, limiter, and level control.

Installation and Integration

The loudspeaker uses a Decora-style, wall-mounted format. Two inputs are specified, with an impedance of 30 kΩ when balanced or 10 kΩ when unbalanced. Nominal input levels are +4 dBu for balanced operation and -10 dBV for unbalanced operation. The listed minimum input level is 18 dBu for a balanced connection at maximum gain and -19 dBV for an unbalanced connection at maximum gain. Maximum input level is +22 dBu.

Power requirements are 24 Vdc at 55 mA while idle and 100 mA maximum, with a ground-referenced supply. The recommended power supplies are the PS-24AS for the USA and the PS-24AX for international use. The source data identifies these as recommended supplies but does not specify that either supply is included. The permitted ambient operating environment is 0° C to 40° C maximum, with 20° C recommended.

Performance Highlights

The DB-PSP1 provides a nominal frequency range of 150 Hz to 20 kHz and a maximum SPL of 81 dB. Its common-mode rejection ratio is specified at greater than 50 dB from 50 Hz to 120 Hz. Together with the balanced and unbalanced input specifications, these figures clearly define the unit’s signal and output operating parameters.

The integrated 2 W amplifier supplies the active speaker section, while the built-in limiter is part of the product’s compact audio design. Level is adjusted using the single-turn audio-taper control on the front panel. The provided specifications do not state a limiter threshold or additional processing modes, so operation is centered on the documented amplifier, limiter, input, and gain-control functions.

What Makes It Different

The distinguishing feature of this model is the concentration of several audio functions into a narrow Decora-style wall-mounted assembly. Rather than serving only as a passive loudspeaker, the DB-PSP1 incorporates amplification, limiting, and direct user level adjustment. Its compatibility with balanced and unbalanced nominal signal levels further supports integration across different audio source types. The supplied product title identifies this DB version as black.

RDL also provides a PDF specification sheet for the product, along with engineering functional-block, front-panel, and rear-panel CAD files in American DXF format. High-resolution product images are identified as TIF files.

Final Assessment

The RDL DB-PSP1 is a focused solution for installations requiring a black, wall-mounted Decora-style active loudspeaker with local user level control. Its documented strengths are its ultra-compact dimensions, integrated 2 W amplifier and limiter, balanced or unbalanced input support, and clearly specified 24 Vdc power requirements. With an 81 dB maximum SPL and nominal 150 Hz to 20 kHz response, the model provides a defined performance envelope for compact installed-audio integration.