SoundTube amplifiers provide cost-effective amplification for a variety of applications. Our compact SA and SB Series amps are perfect for digital signage, education, POP displays, museum displays and trade show booths, while the new MA3501t has the power you need for distributed sound in a facility. + View Series Accessories


SA202-RDT     |     SA202 w/o PS     |     SA502     |     MA501t     |     MA3501t     |     SB335     |     P350

SA202-RDT

20-WATT PER CHANNEL CLASS AB MINI AMPLIFIER

35 dB maximum gain with 2 x 20 watt output at 4 Ohms. Dual RCA, stereo mini jack and high-level inputs. High pass filter at 120 Hz to reduce bass distortion in smaller speakers. Aluminum housing with integrated heat sink. Power inputs include either three-pin Euroblock or barrel connector. 12-volt trigger for automatic on/off functions when source power is detected. Included SA202-RDT accessories: universal pole- and surface-mount adaptor, 15-volt power supply. Designed for the FP series speakers.

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Frequency Response (-3 dB) 20 Hz–20 kHz (+/- .1 dB)
Power Per Channel 20 watts (4 ohm stereo), 10 watts (8 ohm stereo)
Signal to Noise 92 dB (100 Hz, 12 dB per octave, 4 ohm, A-weighted)
Input Impedance 6k ohms
Max Gain 35 dB
Filters 120 Hz, 12 dB per octave
Height 31.2 mm (1.23 in.)
Width 101.1 mm (3.98 in.)
Length 123.6 mm (4.86 in.) including connectors
Packaging 1 per box – includes mounting hardware. P/S shipped separately
Optional Accessory Rack mount adaptor (AC-SA202-RMA)
Weight 0.25 Kg (0.55 lbs.) amp only
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SA202 w/o PS

20-WATT PER CHANNEL CLASS AB MINI AMPLIFIER

35 dB maximum gain with 2 x 20 watt output at 4 Ohms. Dual RCA, stereo mini jack and high-level inputs. High pass filter at 120 Hz to reduce bass distortion in smaller speakers. Aluminum housing with integrated heat sink. Power inputs include either three-pin Euroblock or barrel connector. 12-volt trigger for automatic on/off functions when source power is detected. Included accessory: universal pole- and surface-mount adaptor. Designed for the FP series speakers.

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Frequency Response (-3 dB) 20 Hz–20 kHz (+/- .1 dB)
Power Per Channel 20 watts (4 ohm stereo), 10 watts (8 ohm stereo)
Signal to Noise 92 dB (100 Hz, 12 dB per octave, 4 ohm, A-weighted)
Input Impedance 6k ohms
Max Gain 35 dB
Filters 120 Hz, 12 dB per octave
Height 31.2 mm (1.23 in.)
Width 101.1 mm (3.98 in.)
Length 123.6 mm (4.86 in.) including connectors
Packaging 1 per box – includes mounting hardware
Optional Accessory Rack mount adaptor (AC-SA202-RMA) PS-1530-RDT Power Supply
Weight 0.25 Kg (0.55 lbs.) amp only
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SA502

50-WATT PER CHANNEL CLASS D AMPLIFIER

34 dB maximum gain with 2 x 50 watt output. Three operating modes: stereo, mono or bridged mono. Three user selectable inputs: balanced stereo (euroblock), stereo unbalanced mini jack, or high level euroblock. External 12-32 V trigger. Signal detecting auto standby to con- serve energy. Dual concentric gain controls for inde- pendent channel control. 20 Hz- 20 kHz frequency response. 120 Hz high pass switch. Small size- 1.2″ x 3.9″ x 4″. Rugged aluminum housing.

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Frequency Response (-3 dB) 20 Hz – 20 kHz
Power per channel @ < 10 % THD 55 watts (8 ohm) 2 x 70 watts (4 ohms)
Power per channel @ < 1 % THD 50 watts (8 ohm) 65 watt (4 ohm)
Bridged mono power @ < 1 % THD 90 watts (4 ohm)
Signal to Noise > 83 dB (50 watts)
Input Impedance 47 kohm line level, 600 ohm balanced
Input Sensitivity 0.5 v line input
Max Gain 34 dB (8 ohm)
High-pass filter (F3) 120 Hz (12 dB per octave) selectable
Height 30.5 mm (1.2 in.)
Width 99.1 mm (3.9 in.)
Length 101.6 mm (4.0 in.)
Optional Accessory Rack mount adapter kit (AC-SA502-RMA)
Weight 0.26 kg (0.56 lbs)
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MA501t – NEW*

COMPACT MULTI-CHANNEL 50-WATT AMPLIFIER MA-Angled

The MA501t is a low-voltage mono power amplifier engineered for use in distributed sound applications. Designed for use with SoundTube and other high-fidelity speakers, the MA501t provides 50 watts of output power at 25V, 70V or 100V. A 12V trigger is provided for auto-on/off functions. Recessed gain control is available via the front panel; this deters unauthorized tampering with levels or other settings. UL 60065 Listed; CCC, CE, RoHS Approved.

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Amplifier Power 50 Watts RMS >.5% THD
Overall Response 30 Hz – 20 kHz Hz +/- 3 dB @ 1 Watt < 0.2% THD
Power Band Width Response 50 Hz – 20 kHz +0, -3 dB
Inputs RCA Unbalanced/Single Euro Block Balanced
Maximum Input Sensitivity 500 mV for full output
THD+ Noise <.1% below rated output power
Input Impedance 20K unbalanced, 15K balanced
Current consumption 120V 0.6 A/AC
Height 32.0 mm (1.25 in.)
Width 100.0 mm (3.9 in.)
Depth 200.0 mm (7.9 in.)
Weight – amp only 0.73 kg (1.6 lbs)
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MA3501t – NEW*

EFFICIENT CLASS G HIGH CURRENT MONO-BLOCK 350 W AMPLIFIER MA-stacked2

The MA3501t is a high-output, low-voltage mono power amplifier engineered for use in distributed sound applications. Designed for use with SoundTube and other high-fidelity speakers, the MA3501t provides 350 watts of output power into 4 ohms, 25V, 70V and 100V and 225 watts into 8 ohms. A 12V trigger is provided along with automatic music sensing for remote on/off functions. No controls are available via the front panel; this deters unauthorized tampering with levels or other settings. 2 standard RU size- 3.5″ or 3.75″ With Feet H X 19″ W X 13.75″ D. Rugged aluminum housing. UL 60065 Listed

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Amplifier Power 350 Watts RMS < .1% THD @ 4 Ohms, 700 Watts peak, Direct Output 225 Watts RMS < .1% THD @ 8 Ohms, 400 Watts peak, Direct Output 350W – 25V/70V/100V < .1% THD Transformer Output
HP Filter – Switchable 40Hz – 60 Hz
Overall Response 20 – 100 kHz Hz +/- 3 dB Direct, 30 Hz – 35kHz +/- .5 dB
Power Band Width Response 30 Hz – 65 kHz +0, -3 dB Direct 30 Hz – 50 kHz +0, -3 dB Transformer
Inputs Dual RCA Unbalanced/Single Euro Block Balanced
Maximum Input Sensitivity 175 mV for full output unbalanced/balanced/Variable
THD+ Noise <.05% 20-20kHz below rated output power
Input Impedance 20K unbalanced, 10K balanced
Current consumption 120V 3A @ 8 ohms, 5.5A @ 4 Ohms Continuous Program
Height 88.9 mm (3.5 in.) With Feet – 95.25 mm (3.75 in.)
Width 482.6 mm (19 in.)
Depth 349.25 mm (13.75 in.) 2 Standard RU
Weight – amp only 13.38 kg (29.5 lbs)
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SB335

3-CHANNEL MINI AMPLIFIERSB335-front

This small 3-channel amplifier offers discreet, versatile amplification for digital signage, museum, education or corporate applications. Use it to power a soundbar or up to 3 speakers. The SB335 provides 35 watts per channel output at 8 ohms (3 channels) or 50 watts per channel in 2 channel mode. It includes IR learning for volume control via a TV remote, Bluetooth® connectivity, Dolby Digital® decoding and RS232 volume control.

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Amplifier Power 2 Channel – 50 watts @ 8 ohms, 55 watts @ 4 ohms
3 Channel – 35 watts @ 8 ohms, 40 watts @ 4 ohms
Frequency EQ +3 dB Switchable @ 120 Hz @ 12 dB/octave
Signal to Noise Better than 84 dB unweighted
Inputs 10K unbalanced line input stereo analog, optical digital 2 or 3 channel, RS232 control, Bluetooth, External IR
Max Gain 34 dB
Height 32.0 mm (1.25 in.)
Width 100.0 mm (3.9 in.)
Depth 184.0 mm (7.25 in.) including connectors
Packaging 1 per box – includes mounting hardware
Weight 0.422 Kg (0.93 lbs.)
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P350

Class-G High-Current Mono Block Amplifier

P350 is a Class-G high current subwoofer/full range mono block amplifier. The P350 is the companion amplifier to custom in-wall subwoofer systems but its use is not limited to only subwoofer applications. It also has the flexibility of operation as a full range high current, high performance, mono-block audio power amplifier.

Protection: Soft clipping (subwoofer mode) Short circuit / overload, thermostatic variable speed fan cooling. Thermal overload protection, over current protection.

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Frequency Response (-3 dB) 10 Hz – 20 kHz (+/- .1 dB)
Power Output 225 watts (8 ohm stereo), 350 watts (4 ohm stereo)
LFE Frequency Response 20 – 500 Hz
Full-Range Response 10 Hz – 20 kHz +/- .25 dB
Low Frequency EQ -3 dB to +6 dB @ 30 Hz
Inputs Gold-Plated Balanced RCA; Balanced XLR
Max Current Consumption 3 Amps @ 8 ohms; 5.5 Amps @ 4 ohms
Height 50.8 mm (2.0 in.)
Width 438.1 mm (17.25 in.)
Depth 336.5 mm (13.25 in.) including connectors
Optional Accessory N/A
Weight 7.71 Kg (17 lbs.) amp only