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PowerZone™ 252

UBX-888-001

250 W non-networked Class-D amplifier with 2 channels

  • Compact 1U half-rack form factor.
  • Hybrid power distribution in both Lo-Z and Hi-Z.
  • Flexible power sharing across output channels.
  • Powered by Pascal UMAC™ Class-D technology.
  • Eight-position DIP switch for operational configuration, including locking front panel gain control.
  • GPIO interface for remote volume and standby.
  • ErP and Energy Star compliant.
  • UL listed audio equipment.
Output Power @ 4/8Ω 2 x 125 W
Output Power @ 70/100V* 2 x 125 W
Total System Power 250 W
Power Consumption 75 W
Dimensions 44.5 x 220 x 262 mm
1.75 x 8.66 x 10.31 in
Weight 1.9 kg | 4.2 lbs
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Maintenance Port Only used by Blaze Audio

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DIP Switches See user manual for configuration options

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GPIO Connections External control & monitoring

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INPUT All channels

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OUTPUT All channels

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Mains Power IEC 90-268 Vac input

PowerZone™ series

PowerZone™ is a series of non-networked Class-D installation amplifiers engineered for professionals who demand affordable, reliable, high-performance audio power.

Key features include flexible configuration options that allow each output channel to be independently set to drive either Lo-Z or Hi-Z loads, enabling you to tailor your system to drive both types of loudspeakers from a single unit. Additionally, the PowerZone™ series’ power-sharing technology (exclusive to the 252 and 504 models) intelligently distributes the total available power across channels, ensuring optimal performance and reliability.

With full rack support and adaptable desk and wall mount brackets, the PowerZone™ series offers unparalleled installation versatility in a compact form factor that seamlessly fits into spaces where other amplifiers may fall short.

Like all PowerZone products from Blaze Audio, these amplifiers come with a 5- year warranty.

Product Data

Additional information

Total System Power

250 W

Output Power @ 4/8Ω

2 x 125 W

Output Power @ 70/100V*

2 x 125 W

Powershare (up to) Across all channels**

1 x 250 W

Power Consumption

75 W

Dimensions

44.5 x 220 x 262 mm
(1.75 x 8.66 x 10.31 in)

Weight

1.9 kg (4.2 lbs)

Output Circuitry

UMAC™ Class D – full bandwidth PWM modulator with ultra-low distortion

Output Voltage

45Vrms (S.E) – 70/100V (Hi-Z)

Signal To Noise-Ratio

> 100 dB (A-weighted, 20 Hz – 20 kHz, 8 Ω load)

THD+N (typical)

< 0.05 % (20 Hz – 20 kHz, 8 Ω load, 3 dB below rated power)

Frequency Response

20 Hz – 20 kHz (+0/-0.25 dB (8 Ω load, 3 dB below rated power)

Protection Circuits

Short circuit protection, DC protection, under voltage protection, temperature protection, overload protection

Power Supply

UREC™ universal mains switch mode power supply with Power Factor Correction (PFC)
and integral standby converter

Operating Voltage/Frequency.

Universal Mains, 100-240V, 50-60Hz

Standby Consumption

< 0.5 W (Energy Star & ErP 1275/2008/EC compliant)

Power Ratings

1% THD @ 120VAC and 230VAC

Yes, the amplifiers will remember the settings of maximum volume when dipswitch number 8 is placed in the upper position. This is most helpful if 10K ohm potentiometers are used or if the amplifier is used in a larger installation controlled from a DSP.

Is it possible to mute the amp when receiving a dedicated signal (Fire and Evac), especially for security reasons, e.g., in shopping malls or schools with voice alarms?

Yes, the amplifier can be triggered to go into standby using the GPIO contact on the back of the amplifier. A normally open (NO) or normally closed (NC) contact can be used.

Do I have to bridge outputs for 100V mode?

No, each output can be driven in either Low-Z or High-Z. This makes these amplifiers very flexible.

Why is there a maintenance USB port on the back?

The maintenance USB port can be used to update the built-in DSP in the amplifiers. Look at our website to find the latest firmware (It is normally not necessary to update the firmware).

Can I link PowerZone amplifiers together, as I can with the PowerZone Connect amplifiers?

No, only by linking the inputs. The PowerZone amplifiers do not have S/PDIF in and out, as the PowerZone Connect series.

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