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Roland BA-55 Battery Powered Portable Amplifier (Black)

B&H # ROBA55B MFR # BA-55
No Longer Available

Product Highlights

  • Portable Powered Speaker
  • Built-in Wireless Receiver
  • Includes Wireless Handheld Microphone
  • 20 Watts Output Power
  • Accelerometer Sensor for Mono / Stereo
  • AC or Battery Powered
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The Roland BA-55 Battery Powered Portable Amplifier is a versatile and powerful self-contained speaker for singers, presentations, personal monitoring for performers and DJs, and light sound reinforcement. The speaker features 20 watts of output power and an internal wireless microphone receiver. The BA-55 also ships with a handheld wireless microphone for wireless operation right out of the box.

The BA-55 features an internal accelerometer sensor that automatically switches between stereo output (when positioned horizontally) and mono output (when positioned vertically). If you're speaking and need maximum power and projection, use the vertical mono mode. For wide musical spread, turn horizontal. Additional features include echo and reverb effect, anti-feedback control and 3-band built-in mixer with 2-band EQ controls.

Portable design with high-quality sound for audiences up to 80 people
SPL (sound pressure level) rated at a powerful 108dB
One 2.4 GHz wireless microphone included (DR-WM55); a second DR-WM55 can be purchased separately for simultaneous use
Operates on 8 AA batteries or AC power (AC adaptor included)
Onboard accelerometer sensor switches operation to stereo mode when positioned horizontally
Two 6.5" (16cm) high-performance speakers
Three-channel built-in mixer with two-band EQ
Echo/Reverb effect
Built-in Anti-Feedback function
Line Output for recording or expanding the system
Integrated storage compartment for storing wireless microphones and accessories
Auto Power Off function
Compatible with Roland ST-A95 speaker stand
Output Power 20W (10W + 10W)
SPL 108 dB
Input Level MIC (XLR type): -50dBu
AUDIO/INST (RCA phono type): -10dBu
AUDIO/INST (Stereo miniature phone type, 1/4-inch phone type): -20dBu
Output Level LINE OUT: -10dBu
Speakers 6.5" (16cm) x2
Wireless Roland Original (for DR-WM55 only)
Controls POWER Switch, CHIME Button, CHIME VOLUME Knob, ECHO Knob, AUTO POWER OFF Switch
Channel Controls: Wireless 1, Wireless 2: VOLUME KnobAUDIO/INST: VOLUME Knob
Master Controls: HIGH Knob, LOW Knob
Connectors MIC: Input jacks (XLR type, 1/4-inch TRS phone type)
LINE: AUDIO Input jacks (Stereo miniature phone type, RCA phono type), INST Input jack L/MONO (1/4-inch phone type), INST Input jack R (1/4-inch phone type)
Output: LINE OUT jacks (RCA phono type)
Power DC 12V
Alkaline battery (AA, LR6) x8
Rechargeable Ni-MH battery (AA, HR6) x8
AC Adaptor
Current Draw
Expected Battery Life Under Continuous Use
Alkaline battery (AA, LR6): about 6 hours
Rechargeable Ni-MH battery (AA, HR6): about 6 hours
Dimensions (WxDxH) 14 x 10-7/16 x 18-15/16" (355 x 265 x 481mm)
Weight 19 lb, 14 oz (9kg)
Roland BA-55 Battery Powered Portable Amplifier (Black)
  • Wireless MIC (DR-WM55)
  • Power Cord
  • AC Adaptor
  • Owner's Manual
  • 1 Year Warranty
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    Batteries & Power

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    Required item: Batteries (not included) are required to power this device.

    Varta - High-Energy 1.5V AA LR6 Alkaline Battery (4-Pack)
    • You Pay: $2.99
    Watson - 4-Hour Rapid Charger with 4 AA NiMH Rechargeable Batteries (2300mAh)
    • You Pay: $17.95


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    Kopul - Studio Elite 4000 Series XLR M to XLR F Microphone Cable - 6' (1.8 m), Black
    • You Pay: $16.99

    Stands & Support

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    Auray - TT-6110 Desktop Microphone Stand (Black)
    • You Pay: $8.95

    Wind Protection

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    Auray - WHF-158 Foam Windscreen for 1-5/8" Diameter Microphones
    • You Pay: $2.95
    Transcend - 2GB SD Memory Card
    • You Pay: $4.95
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