UK Sales: 0191 418 1122         International: +44 191 418 1133

Menu

www.canford.co.uk

20 December 2024

RDL FP-PA20A POWER AMPLIFIER Mono, 20W/70V/100V, terminal block I/O

Stock code
57-272
Brand
RDL (Radio Design Labs)
Model number
  • FP-PA20A
RDL FP-PA20A POWER AMPLIFIER Mono, 20W/70V/100V, terminal block I/O
RDL FP-PA20A POWER AMPLIFIER Mono, 20W/70V/100V, terminal block I/O

Order

VAT / Delivery
$413.31
each (ex. VAT)
Ordered on demand, available in 1‑2 weeks. Need it sooner? Call us
RoHS Compliant

RDL AV INTERFACES - FLAT-PAK Series

RDL Flat-Pak products are constructed in compact, low-profile, shielded, heavy-duty metal chassis. They can be directly screwed or bolted to cabinets or shelves. Accessories permit mounting single or multiple modules to front or rear rails, while adjacent mounting of modules is facilitated by 'daisy-chaining multiple modules from a single power supply using included power interconnect cables'. The series provide 'the most common connections in professional installations', including 'gold-plated jacks, detachable and fixed terminal blocks'. Bold, high contrast labelling 'facilitates connection and adjustment in confined or dark locations'. LED metering and indicators shorten setup and adjustment time.

AUTOMATIC LEVEL CONTROLLERS

FP-ALC1 Automatic Level Controller

A single-channel level controller for balanced or unbalanced line-level signals, with detachable terminal block connectors. Output level is nominal 4dBu with>18dB headroom and input levels can range from -16 to +14 dBu, with a single gain control and overload LED for adjustment. Control circuitry has self-adjusting attack and release times and split-band AGC circuitry. Input impedance: 10k ohms; output impedance: 150 ohms; frequency response: 20-20,000 Hz (+ or - 0.75dB); THD <0.15%; noise: <-90dB (below +4dBu). Supply 24V 80mA. Dimensions (l x h x w): 157 x 33 x 83mm.

FP-ALC2 Stereo Automatic Level Controller

A stereo level controller for unbalanced line-level signals, with RCA (phono) connectors. Output level is nominal -10dBV with>18dB headroom and input levels can range from -30 to 0 dBV, with a single gain control and overload LED for adjustment. Control circuitry has self-adjusting attack and release times and split-band AGC circuitry. Input impedance: 10k ohms; output impedance: 200 ohms; frequency response: 20-20,000 Hz (+ or - 0.5dB); THD: <0.15%; noise: <-90dB (below -10dBV). Supply 24V 80mA. Dimensions (l x h x w): 157 x 33 x 83mm

CONVERTERS

FP-BUC2 Balanced to Unbalanced Converter

A stereo balanced to unbalanced converter with gold-plated XLR balanced inputs and gold-plated RCA (phono) outputs. Separate level trim controls are provided. Input level -2 to +10dBu for nominal output -10dBV; output impedance: 75 ohm; frequency response: 10-40,000 Hz (+ or - 0.1dB); THD: 0.005%; Noise: <-90dB (below -10dBV). Supply 24V 50mA. Dimensions (l x h x w): 99 x 29 x 83mm

FP-UBC2, FP-UBC6 Unbalanced to Balanced Converters

Two and six channel unbalanced to balanced converter/ pro interface for replay only machines such as CD players. Input connectors are gold plated RCA (phono) and output connectors are gold-plated XLR connectors. A gain adjustment (-5dB to +10dB) control is provided for each channel. Input: 10k ohms unbalanced -20dBV to -5dBV; output: 150 ohms balanced or unbalanced (drives 600 or 10k ohms loads); frequency response: 20-40,000 Hz (+ or - 0.25 dB); headroom:>18dB at +4dBu output; THD: <0.05%; noise: <-85dB ref. +4dB; crosstalk:>70dB. Supply 24V 50mA. (UBC2) 75mA (UBC6); Dimensions (l x h x w): 99 (UBC2) 213 (UBC6) x 30 x 83mm.

FP-DCC1 DC/DC Converter

A handy module to provide 24V DC output from a 12V source. Two outputs are provided, one providing 400mA, for general use, and a second low-noise output provides 50mA for microphone and high gain amplifier modules. Inputs and outputs are protected against excessive currents and reverse voltages. Not suitable for supply floating input modules. Supply 24V 1A (terminal block). Dimensions (l x h x w): 107 x 43 x 83mm

FP-DFC2 SPDIF to AES/EBU Converter

A transformer-isolated format converter with TOSlink optical, RCA (phono) and BNC coaxial inputs. Only one input should be used and the output appears on an XLR connector. An LED indicates valid (locked) signal 16 to 24-bit, 32 kHz to 192kHz. Auto-recovery circuitry reduces signal latch-up and improves stability. Supply 24V 30mA. Dimensions (l x h x w): 118 x 33 x 83mm

DANTE INTERFACES

These modules interface standard microphone and line-level audio signals with a DANTE audio network, providing 'flexibility, economy and simplicity' to DANTE networked audio systems. Built in RDL's 'Flat-Pak' packaging, they will mount directly to surfaces or using a range of mounting options. Each provides line-level or microphone level outputs from two DANTE network audio channels. They are offered with or without DC-controlled VCA volume controls, each with or without a POE (power over Ethernet) facility

DANTE is a software and hardware solution, offering high-performance audio distribution over standard IP networks, supporting hundreds of simultaneous channels of uncompressed audio with low latency and accurate synchronization. For further information, DANTE networking basics.

Each output is equipped with a recessed microphone/line switch that provides 50dB of attenuation to feed the microphone input of a mixer-amplifier or other equipment with microphone inputs. Outputs mute when the digital audio inputs are inactive.

Network connector: RJ45 with Link and Speed indicators
Transmission rate: 100Mb/s
Sample rates: 44.1kHz, 48kHz (default)
Bit depth: 24 bits
Audio operating levels: -18dBFS = +4dBu
Output connectors: Detachable terminal block
Outputs: 2x +4dBu, balanced; 150ohms
Response: 20Hz - 20kHz +/- 0.5dB
Distortion: Less than 0.1% THD+N
Noise: Less than -80dB with output active, -95dB with output muted, below +4dBu
Crosstalk: Less than -90dB, 1kHz; 80dB, 20Hz - 20kHz
Headroom: More than 18dB above +4dBu
Indicators: Ethernet, Link and Speed, Sync LEDs
Power input: Coaxial power socket
Temperature: 0 to 40 degrees C
Power source: 24V DC, 100mA or POE where fitted
POE: Class 0, IEEE 802.3af, where fitted
Dimensions: 123 x 44.5 x 82.6mm (w x h x d)mm

Optional accessories: A variety of mounting brackets and adapters. 57-402, an 'RDL PS-24AX POWER SUPPLY Universal, 24 volt, 500mA, UK plug' is a suitable power supply.

The models differ principally in the powering arrangements and whether a facility for remote volume control using a VCA is fitted.

FP-NML2

The FP-NML2 is powered from an external 24V DC power supply, available separately. It has a DC output socket and extension cable that allows it to be operated from a common power supply with RDL Flat-Pak amplifiers. One audio output connects to the Flat-Pak amplifier input, and the second output may be connected to an additional amplifier.

FP-NML2P

This is equipped to operate from a POE enabled network switch. The FP-NML2P will reserve power from the switch even while being powered from an external 24V DC supply. If POE power and an external 24V DC supply are both feeding an FP-NML2P, the unit will run from the external supply but will switch over to POE power upon loss of the external supply.

FP-NML2V

Each output of the FP-NML2V is equipped with a VCA for remotely adjusting the output level. Separate remote controls may be used for each output, or a single remote control may be connected to adjust both outputs simultaneously. A second detachable terminal block provides for two 10V and ground feeds out to a level control, with two return inputs, one for each channel.

It is powered from an external 24V DC power supply, available separately. It has a DC output socket and extension cable that allows it to be operated from a common power supply with RDL Flat-Pak amplifiers. One audio output connects to the Flat-Pak amplifier input, and the second output may be connected to an additional amplifier.

FP-NML2VP

Each output of the FP-NML2VP is equipped with a VCA for remotely adjusting the output level. Separate remote controls may be used for each output, or a single remote control may be connected to adjust both outputs simultaneously. A second detachable terminal block provides for two 10V and ground feeds out to a level control, with two return inputs, one for each channel.

It is equipped to operate from a POE enabled network switch. The FP-NML2VP will reserve power from the switch even while being powered from an external 24V DC supply. If POE power and an external 24V DC supply are both feeding an FP-NML2VP, the unit will run from the external supply but will switch over to POE power upon loss of the external supply.

AUDIO SENDERS – Format-A

FP-TPS4A

Designed for use in hospitality systems and to interface between hotel room televisions and multiple Format-A receivers. The Format-A audio sender accepts a stereo line-level input via dual RCA (phono) connections, or a fixed-level 1 to 3watt amplified signal via a balanced 3.5mm jack socket. The unbalanced line input signal is sent over balanced twisted-pair cables on pairs B and C, whilst a mono amplifier input signal is also conveyed on pairs B and C.

Powered via optional 24Vdc power supply which will also provide power to the connected sending/receiving modules. An LED positioned on the front of the unit indicates the FP-TPS4A is receiving and distributing 24Vdc to all three RJ45 connections. The distributed DC output voltage is short-circuit protected by way of automatically resetting fuse.

MIXERS

FP-MX3R Line Mixer

Three-channel mono mixer with unbalanced/balanced line level inputs and outputs. Input and output connections are via separate and removable terminal blocks. Two unbalanced RCA (phono) output connections are also provided for connection with a stereo amplifier. There are three VCA level controllers for the input channels. A two-LED level indicator is provided. Line input level: -20dBV to +8 dBu. Output level: RCA -10dBV unbalanced; terminal +4dBu, balanced. Frequency response: 20-20,000Hz + or - 0.25dB. THD+N: <0.05%, 20Hz-20kHz; <0.02%, 1kHz.
Supply 24V 120mA. Dimensions (l x h x w): 20.7 x 36.1 x 82.6 mm

FP-MX4 Mic/Line Mixer

Four-channel mono mixer with mic and line level inputs and output. Connections are on separate removable terminal blocks, and each input has mic/line/phantom (24V) switching, as well as three levels of mic gain (40/50/60dB). There are four mixing potentiometers (intended as preset adjusters rather than for continuous use). A two-LED level indicator is provided. Mic input level: -30 to -40/-40 to -50/<-50 dB; line input level: +4dBu. Output level: mic -45dBu, line +4dBu, 150 ohm balanced; frequency response: 10-30,000Hz (mic) 10-45,000Hz (line) + or - 0.25dB; THD: <0.012% (mic), ˂0.004% (line). Supply 24V 160mA. Dimensions (l x h x w): 20.7 x 36.1 x 82.6mm

FP-TPX3A Remote, 3-channel Format-A input Mixer

This remotely controlled, 3-channel mixer features dual twisted pair Format-A inputs with VCA level control for each pair. The mixer is designed for use whereby a user-accessible mixer must control the volume of multiple sources within a zone. FP-TPX3A can mix three Format-A audio signals from pairs A, B and C. A detachable terminal block allows a LOCAL INPUT to be connected directly to pair C. Either A or B connection can be used as input or loop output, whilst a 3-pin terminal block input offers local input. Outputs are by way of single balanced terminal block connections, or two mono RCA phono. Dimensions (HxWxL): 36.1 x 82.6 x 206.8mm. Weight: 408g

PARAMETRIC EQ

FP-PEQ3 3-band Parametric Equaliser

A single-channel 3-band parametric equaliser with balanced input and output on removable terminal block and unbalanced input and output on RCA (phono) connectors. Each band has controls for frequency in three overlapping ranges (15-200Hz, 150-2,000Hz, 1,500-20,000Hz), bandwidth (0.04 to 1.5 octave) and boost/cut (+ or - 15 dB), and an overall gain control. Input and output: +4dBu balanced, -10dBV unbalanced, 10k ohms bridging; frequency response (filters flat): 10-20,000Hz + or - 0.25dB; THD: <0.005%, noise: <-90dB below +4dBu. Supply 24V 120mA. Dimensions (l x h x w): 107 x 33 x 83mm

MICROPHONE PREAMPLIFIERS

FP-MP1 Microphone Preamplifier

A single-channel high quality microphone pre-amplifier with XLR and detachable terminal-block input and output connectors. A three-position switch selects phantom power 24V, 12V or OFF, another switch selects normal (45-55dB) or high (55-65dB) gain with a 10dB gain trim. A switchable low-cut filter (80Hz 6dB/octave) is also provided. Two LED indicators indicate signal level. Input impedance: 2 kohms; input clipping level: -21dBu; frequency response: 20-30,000 Hz (+ or - 0.25 Hz) THD<0.1%; Equivalent input noise: <-130dB. Supply 24V 100mA. Dimensions (l x h x w): 107 x 34 x 83mm

FP-MPA2 Dual Phantom Adaptor

Two independent channels of phantom power supply, with XLR input and output connectors. Each channel has 12/24/48V voltage selection with two power output options for the 24v supply (1.2 or 2.4 kohm load). Complies with IEC1938:1996-12. Supply 24V 120mA. Dimensions (l x h x w): 181 x 37 x 83mm

DISTRIBUTION AMPLIFIERS

FP-VDA4 Video Distribution Amplifier

A 1:4 distribution amplifier for NTSC or PAL video signals. Input and output connectors are BNC and an additional loop output is provided. Adjustable gain (0 to +6dB). Outputs are source terminated, but unused outputs do not require termination. Supply 24V 60mA. Dimensions (l x h x w): 107 x 34 x 83mm

FP-AVDA4 A/V Distribution Amplifier

A distribution amplifier that provides four outputs for consumer video and stereo audio. Inputs and outputs on RCA (phono) connectors. Video: 1V p-p unity gain 75 ohms, 10 Hz- 10MHz (+ or - 0.2dB). Audio: -10dBV unbalanced unity gain, 10 k ohms input impedance, 150 ohms output impedance; headroom>18dB, frequency response 20-40,000 Hz (+ or - 0.25dB). Supply 24V 60mA. Dimensions (l x h x w): 163 x 34 x 83mm

POWER AMPLIFIERS

Versatile, single-channel, utility building blocks in the popular Radio Design Labs ‘Flat-Pak’ packaging, which will mount directly to surfaces or using a range of mounting options. Inputs are electronically balanced and both eight ohm and 70/100V line models are offered, both powered by external 24 volt supplies, solving many varied requirements in most audio engineering environments. All models feature a compressor, automatically adjusting to avoid clipping and maximise audible level from the power available.

FP-PA18

This mono power amplifier with automatic energy-saving sleep mode, offers 18W RMS into an eight ohm load. This Class-D amplifier offers a sleep delay that is programmable to Off/5/15/25mins by way of sunken rotary control on the side of the FP-PA18. A gain control is located next to the I/O terminal block and can be adjusted using a trimming screwdriver. A red LED indicates when the output is 3dB below the rated output and the compressor is employed. The compressor has automatic attack and release adjustment. A green LED illuminates when audio is detected and when the amplifier provides an ‘active open collector’ output. Finally, a blue LED illuminates when the FP-PA18 is powered from its external 24Vdc power supply. The same LED is ‘dimly illuminated’ when the sleep mode disables the amplifier.

Input: Nominally +4dBu / -10dBV, minimum (to cross compressor threshold) -18dBu / -20dBV, maximum +23dBu / +21dBV balanced / unbalanced. Compressor threshold: 3dB below rated output. CMRR: better than >45dB, 50Hz-3kHz. Response: 20Hz - 20kHz +/- 1dB*. Distortion: less than 0.5% at 20Hz - 20kHz respectively*, THD+N. Output: 18W RMS, 8ohms load. Power source: Dimensions: 82.6 x 76.2 x 29.2 (w x l x h) mm. (*at compressor threshold level equivalent to 12W RMS output power).

FP-PA20

FP-PA20 offers an output of 20W RMS into an eight ohm load. Audio levels that could cause the amplified output to clip are compressed according to two dynamic time constants. Normal audio level signals remain unaffected by the compressor thereby preserving audio dynamics and preventing the compressor from increasing feedback potential when the amplifier is used for paging. The compressor is designed to remain aurally transparent while maintaining clean, un-clipped amplified audio for input overloads of up to 20dB. Average audio levels and audio clarity result that are normally expected of amplifiers delivering much higher output power.

Built in a black extrusion, the amplifiers have gain control and LEDs for power and peak level. Connections are by detachable terminal block. A co-axial connector provides an alternative connection for the DC power input. For full RMS output power, a 24V DC power supply with 2 amp capacity is required. A 1 amp supply is sufficient for normal program audio levels and content. Order power supply separately.

Input: Nominally +4dBu / -10dBV, minimum (to cross compressor threshold) -26dBu / -28dBV, maximum +23dBu/+15dBV, 20kohms/10kohms, balanced/unbalanced. Compressor threshold: 6dB below rated output. CMRR: better than 55dB, 50Hz-120Hz. Response: 35Hz - 50kHz +/- 1.5dB*. Distortion: less than 0.1%, 0.5% at 1kHz and 50Hz - 20kHz respectively*, THD+N. Output: 20W RMS, 8ohms load. Power source: 24V DC, 2A, ground referenced, for continuous 20W RMS power output; 24-33V DC, 1A for normal programme material with minimal compression. Ambient: 0-30°C, (20°C recommended). Dimensions: 82.6 x 153 x 58.5 (w x l x h)mm. ( *at compressor threshold level equivalent to 4W RMS output power).

FP-PA20A

FP-PA20A offers an output of 20W RMS into 70V or 100V lines, highly applicable to local zones in multi-zone PA installations. It is essentially similar to the FP-PA20, but has three output terminals for common, 70V 100V.

Specification is the same as the FP-PA20, except for the following. Response: 50Hz-20kHz +/- 3dB*. Output: 20W RMS, 70V or 100V line load.

FP-PA35A

FP-PA35A has a output of 35W RMS into 25/70/100V line. The Class D amplification has a frequency response of 50Hz to 20kHz, a user-adjustable sleep mode with steps of 5, 15, or 25minutes delay, and compressor/limiter with digital limiting.

Input: Nominally +4dBu / -10dBV, 20kohms / 10kohms, balanced/unbalanced. Compressor threshold: 2dB below rated output. CMRR: better than 60dB, 50Hz-120Hz. Response: 50Hz - 20kHz +/- 3dB. Distortion: less than 0.5%, 0.5% at 1kHz and 50Hz - 20kHz respectively, THD+N. Output: 35W RMS. Power source: 100-240V AC, 50-60Hz. Dimensions: 82.6 x 153 x 71 (w x l x h)mm.

POWER INSERTERS

FP-TP4PW

FP-TP4PW is a four output power inserter compatible with RDL twisted pair products. It is powered from an external 24Vdc power supply using either one of the power jacks or the terminal block. Power jacks are provided at each end of the module to facilitate chaining multiple FP-TP4PWs from a single power supply. 4x dual-RJ45 jack sets are provided to connect remote twisted pair senders and receivers. Power is provided to all modules connected to the RJ45 jacks. Signal pairs feed through the associated RJ45s. The voltage feeding each dual-RJ45 jack set is separately protected by an automatically resetting fuse. A power LED is associated with each dual-RJ45 jack set, facilitating identification of wiring faults. Module power is indicated by a front-panel LED.

Dimensions (WxHxD): 135.6 x 82.6 x 26.7mm.

REPEATER/AMPLIFIERS

FP-SPR1 SPDIF Repeater/Amplifier

This module can be used to convert between optical and coaxial formats and to recover low-level signals. BNC and RCA (phono) coaxial inputs are provided and these have priority over the optical input. Either BNC or RCA (phono) coaxial output can be used with the optical output. An LED indicates when a valid signal is present. Input level 100mV to 2.5V p-p (coaxial); output level: 500mV p-p. Sample-rate: 28-48 kHz; Jitter: <200pS (input signal>200mV p-p), <1nS (input signal 100-200mV p-p). Supply 24V 80mA. Dimensions (l x h x w): 94 x 34 x 83mm

MESSAGE REPEATERS

FP-MR2

RDL FP-MR2 module allows the user to electronically store a single recording of up to 1min40sec and play it back manually via an external contact closure or by depressing the 'start' button on the front panel of the hardware. An interval timer of 30secs, 1min, 2mins, 4mins, or 8mins can be employed via dip switching. Dip switches also allow the activation of ducking and voice-over modes. A balanced line-level input on terminal block allows any background music connected to be played at a set level. When the message is played the background music is automatically faded. Dimensions (LxHxW): 127 x 34.6 x 82.6mm. Weight: 0.29kg

Mounting Accessories

The Flat-Pak range all have the same width, with mounting flanges that offer a variety of fixing options. The flanges have notches for simple fixing to a surface using screws and, using special mounting brackets, can be slotted onto RDL 2U rack-mounting panels.

Powering

Powering: All units require a 24V DC power supply; each has both screw terminals and coaxial socket for power input and an additional coaxial socket to feed supply to other modules. A 'universal' supply is available, 57-401, with 24V 2A output, which requires an IEC cordset. See RDL POWER SUPPLIES for further information and a variety of mounting options. Note that all RDL modules with co-axial power input/output sockets use connectors with 2.5mm pins.

Ordering note: All modules are supplied with a datasheet and a power interconnection cable, to cascade power to another module.