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  • Fast and simple payment process
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Cost of purchase 

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Financing - the advantages at a glance
Financing - the advantages at a glance
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  5. Rolls SX 21

Rolls SX 21

Item: REC0006987-000
Rolls SX 21 Product Image
Rolls SX 21 Product Image
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Precise 2-way crossover with adjustable crossover frequency, separate output levels and 24 dB/octave slope.  All product info
Rolls

€ 169.00
incl. VAT
available soon, estimated to be in stock: Aug 15, 2026

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Rolls SX21

Precise frequency separation

  • 2-way mono crossover
  • 24 dB/octave slope
  • Continuously adjustable crossover frequency from 50 Hz to 2.5 kHz
  • 1/4" TS jack input (unbalanced)
  • 1/4" TS high and low outputs (unbalanced)
  • Separate level controls for high and low outputs
  • Adjustable input level
  • Clip LED for early overdrive indication
  • External power supply (12–15 VDC, 150–500 mA) included
  • Low ‘ Eigenrauschen ’ thanks to external power supply
Rolls SX21 2-way crossover

Compact crossover for demanding applications

The Rolls SX21 is a high-performance, two-channel mono crossover designed specifically for smaller PA systems, combo bands or bassists. With its precise crossover in the range from 50 Hz to 2.5 kHz and a steep filter slope of 24 dB/octave, the SX21 enables clear and clean signal separation for individual amplifier and loudspeaker combinations.

Rear view

Precise control over the audio signal

The SX21 features a variable crossover that allows the crossover frequency to be adjusted continuously. In addition, separate output level controls are available for the high and low paths, enabling precise fine-tuning of the signal ratios. A clip LED indicator helps to detect and prevent level clipping at an early stage.

Practical inputs and outputs

Equipped with 6.35 mm jack sockets (TS, unbalanced) for the input as well as for the high and low outputs, the SX21 integrates seamlessly into existing setups. The input has an impedance of 10 kOhm, whilst the outputs are rated at 1 kOhm.

Low-noise power supply and robust construction

A 15-volt plug-in power supply (Rolls PS27s), included in the package, ensures a reliable power supply whilst maintaining low inherent noise. Thanks to its external power supply, the SX21 remains particularly quiet in operation. With its compact dimensions of just 10.8 x 9.2 x 3.8 cm and a weight of around 450 g, the crossover is also ideal for mobile use.

Technical specifications:

  • Input impedance: 10 kOhm
  • Output impedance: 1 kOhm
  • Headroom: +10 dBV
  • Crossover frequency range: 50 Hz – 2.5 kHz
  • Filter slope: 24 dB/octave (Linkwitz-Riley)
  • Input: 6.35 mm TS jack (unbalanced)
  • Outputs: 6.35 mm TS jack for high and low signals (unbalanced)
  • Adjustable input gain
  • Separately adjustable output levels for high and low
  • Clip LED (lights up 3 dB before clipping)
  • Power supply: 12–15 VDC, 150–500 mA (external PS27s power supply unit included)
  • Dimensions (W x D x H): 10.8 x 9.2 x 3.8 cm
  • Weight: approx. 450 g


Manufacturer information
Rolls Corporation
S 350 W 5968
Utah 84107 Murray
USA
[email protected]
www.rolls.com EU economic operator
PAT GmbH
Zum Wartturm 15
63572 Gelnhausen
Germany
[email protected]
www.proaudio-technik.de
+49 (0)6051 - 9140-0

Features:

  • Manufacturer: Rolls
  • Signal type: Line
  • Number of channels: 1
  • Inputs analog: 6.35mm jack TRS
  • Outputs analog: 2 x 6.3 mm jack
  • Format: Desktop
  • Rack Installation Possible: No
  • Level control: Yes
  • User: Pro
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