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Silver rack-mount amplifier, 19 inches wide, 5.25 inches tall, 11 inches deep

Bogen Communications

Bogen Communications HTA125A 125W car amplifier

SKU CH-K5RZ-RBCKM MPN HTA125A

Rack-mountable 125 W RMS amplifier with 20–20,000 Hz response and <.5 % THD

  • Other specificationsSensitivity: Hi-Z, 500mV; Lo-Z balanced, with optional trans
  • Output power125 W RMS
  • Frequency range20-20,000 Hz
  • Headphone style<0.5% from 20-20,000 Hz
  • Additional connectorsTerminal Strip (output) RCA (input) Terminal Strip Balanced
  • Product typeAmplifier
  • 125W RMS continuous power for demanding audio systems
  • Less than 0.5% total harmonic distortion across 20–20,000 Hz for clean output
  • MOSFET design runs cooler and weighs 36.00 lbs for reliable rack mounting
  • Multiple output loads including 4Ω, 8Ω, 25V and 70V lines for flexible wiring
  • 90dB signal-to-noise ratio keeps background hiss inaudible

125 W RMS rack amplifier

The Bogen Communications HTA125A is a 125 W RMS power amplifier built for rack mounting. It uses power MOSFET circuitry to deliver high efficiency and low heat in a 19.00" x 5.25" x 11.00" chassis weighing 36.00 lbs. The unit accepts hi‑Z unbalanced, lo‑Z balanced and RCA inputs, then drives 4 Ω, 8 Ω, 25 V or 70 V constant‑voltage lines through a terminal strip.

Installers needing multi‑voltage line driving

This amplifier suits commercial audio installers who require a single rack unit to feed both low‑impedance speakers and 25 V or 70 V distributed lines. It is not suited for users who need front‑panel level controls, built‑in signal processing or consumer‑style binding‑post outputs.

125 W RMS into 4 Ω, 8 Ω, 25 V or 70 V loads

The specified 125 W RMS rating applies across all supported output loads: 4 ohms, 8 ohms, 25 V centre‑tap (5 ohms) and 70 V (40 ohms). If the installation demands more than 125 W continuous power, this model will not meet that requirement.

How it compares

Measured against everything we stock in Car Audio Amplifiers, at today’s prices. Recalculated every night.

Price $577.99
Pricier than about 82% of the 158 comparable items (median $225.49).

Specifications

Product
Brand nameBogen
Model nameHTA125A
Product typeAmplifier
Audio & video
Frequency range20-20,000 Hz
Headphone style<0.5% from 20-20,000 Hz
Power
Output power125 W RMS
Size & build
Product dimensions19 in × 5.25 in × 11 in
Product weight36 lb (16.3 kg)
Shipping weight18.39 kg
Package size556 × 391 × 259 mm
More details
Other specificationsSensitivity: Hi-Z, 500mV; Lo-Z balanced, with optional transformer, 100mV
Hum & Noise: 90 dB below rated output
Output Load: 4 ohms, 8 ohms, 25VCT (5 ohms), 70 V (40 ohms)
Input Impedance: Hi-Z, 50,000 ohms unbalanced; Lo-Z, 600 ohms, balanced or unbalanced, and 1:1 bridging with optional plug-in transformers
Filters: Lo-Cut: -10 dB at 100 Hz (selectable)
Controls: Input level control, circuit breaker reset, lo-cut filter switch, on/off

Questions about this item

Will the 125W RMS output drive my existing 4-ohm speakers cleanly?

Yes, the amplifier delivers 125W RMS into 4 ohms with THD below .5% across 20-20,000Hz.

How do I verify the amplifier is performing correctly once installed?

Measure output at the terminal strip; expect 125W RMS into 4 or 8 ohms with hum and noise 90dB below rated output.

Does the box include the Lo-Z transformer and RCA cables, or must I buy them separately?

The unit provides terminal-strip outputs, RCA input and balanced Lo-Z input terminals; the optional Lo-Z transformer and interconnect cables are not included.

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