Ashly PowerFlex 6250 User Manual

PowerflexTM 6250 Six Channel Power Amplifier

Architects Specifi cations

Powerflex-6250 Six Channel Amplifier

The power amplifier shall be a multichannel unit consisting of six
independent channels. Each amplifier shall be able to deliver 150
watts into 8 ohms, or 250 watts into 4 ohms. In addition, bridged
pairs shall be able to output 500 watts each into 8 ohms. Also,
when pairs are bridged, the unit shall provide 500 watts capable
of driving a 70 volt system without the use of external trans­formers.

The amplifier shall have a gain of 30.1dB and an input sensitivity
of 1.05 Volts RMS for full rated output. Frequency response shall
be 20Hz to 20kHz +/- 0.5dB at 8 ohms. The unit shall be stable
into any load, including pure capacitors and inductors. Hum and
noise shall be at least 100dB below full output (A-weighted) and
SMPTE intermodulation distortion shall be less than 0.2%. Total
Harmonic Distortion (20Hz - 20KHz at 8 ohms) shall be less than

0.2%.

Each amplifier channel shall be supplied with an input attenuator
located on the rear panel input module. Each pair of inputs shall
have a bypassable high pass filter of 12dB/octave at 50Hz, a
switch to select stereo or mono mode and a switch to select dual
or bridge mode. There shall be an input ground switch located on

Technical Notes & Specifications

the input module to select chassis or floating ground operation.

The inputs shall be active balanced design, with an impedance of
10K ohm accessible with combination XLR - 1/4” jacks and euro­bloc connectors. The outputs shall be terminated with a 5-way
binding post connector.

Individual channel indicators for protect, thermal overload, clip
and signal present shall be LEDs located on the front panel.

Cooling shall be supplied by a temperature sensitive three-speed
fan drawing air from the front of the unit and exiting through the
rear.

The unit shall be capable of operation by means of its own built­in power supply connected to 110 - 125V AC, 220 - 250V AC, 50/
60Hz. Dimensions of the unit shall be 19”L X 5.25”H X 16.5”D.
The chassis shall be constructed from steel with an aluminum
face panel and weigh 45lbs.

The unit shall be the Powerflex™ 6250 manufactured by Ashly
Audio, Inc.

• Six Channel Amplifier - 150W/Ch @
8 Ohms, 250W/Ch @ 4 Ohms

• 25V and 70V System Applications

• Revolutionary High-Speed Switched

MosFet Output Design with Spread
Spectrum Switching Technology

• Superior Efficiency Over

Conventional Linear Amplifiers

• Input Module with Level Controls
Located on Rear Panel

• Switchable HPF on Inputs

• XLR - 1/4”, Eurobloc Input
Connections

• 5-Way Binding Post Output
Connections

• Individual Channel Front Panel Level

and Protection Indicators

• Multiple Protection Circuits

• Exceptional Audio Fidelity

• Bridgeable Channel Pairs

• Internal Modular Design

• Quiet, Three-Speed Fan

• Front In/Rear Out Channeled Air-

Flow

• Five Year Warranty

General Specifications Powerflex-6250

*Power Output
(Maximum Average Power, 0.1% THD, 1KHz)

Rated Per Channel, Two Channels Driven
4 ohm: 250 Watts RMS
8 ohm: 150 Watts RMS
25V: 150 Watts RMS
Mono Bridged (1 Channel)
8 ohm: 500 Watts RMS
70V: 500 Watts RMS

Rated Per Channel, Six Channels Driven
4 ohm: 250 Watts RMS†
8 ohm: 150 Watts RMS
25V: 150 Watts RMS
Mono Bridged (3 channels)
8 ohm: 500 Watts RMS
70V: 500 Watts RMS

Frequency Response:
8 ohm: ±0.5dB 20Hz-20kHz
4 ohm: ±1.5dB 20Hz-20kHz
Voltage Gain: 32X (30.1dB)

Crosstalk: < -80dB (20Hz - 1KHz)

Signal Present Signal Sensitivity: 13mV RMS (-35.5dBu)

Power Requirement: 110-125VAC, 220 - 250VAC, 50/60Hz

Typical Idle Current
120V: 0.81A
240V: 0.42A

Current with Typical Audio Program Material (4 ohm load x 6
Channels)
120V: 6.5A
240V: 3.3A

Input Impedance: 10K ohm balanced, 37K ohm unbalanced

High Pass Filter: 50Hz, 12dB/octave

**Total Harmonic Distortion (20Hz - 20KHz @ 8 ohms): <0.2%

**IMD
(SMPTE 60Hz/7KHz 4:1) @ 8 ohms: <0.2% (throughout power
range)
(IHF) @ 8 ohms: <0.1% (throughout power range)

**Hum and Noise: -100dB from full output (A-weighted)

Full Power Input Sensitivity: 1.08V RMS (2.9dBu)

* Continuous power limited by power line capacity
**Non-conventional amplifiers require bandwidth limiting for all distortion and noise measurements
† Signal peaks in audio programming may trigger protection circuitry at low line voltages
Specifications are subject to change or improvement without notice

Connections
Input: XLR - 1/4” (Pin 2: Hot, Tip: Hot), Eurobloc
Output: 5-Way Binding Post

Cooling: Forced Air, Thermal Sensitive 3-Speed Fan, Front Inlet/
Rear Outlet

Dimensions: 19”L x 5.25”H x 16.5”D

Construction: All-Steel Chassis, Extruded Aluminum Front Panel

Weight: 49 lbs. net, 56 lbs. shipping

Specification conditions are: 120VAC mains at 60Hz, 25° C

Powerflex-6250 Rear Panel

Applications: Any multichannel power amplification application, 25 and 70V systems, paging systems, sound masking systems,
cinema systems, boardroom audio applications, multiple zone restaurant, bar, theme park or auditorium systems, surround sound
applications, recording studios, PA and DJ applications.

Ashly manufactures a complete and comprehensive line of Graphic and Parametric Equalizers,

Electronic Crossovers, Power Amplifiers, Compressor-Limiters, Mixers, and

Amplifier Input Options. Please call, write or visit our web site for information on any of these Ashly Products.

Ashly Audio Inc., 847 Holt Road, Webster, NY 14580-9103, Toll Free [phone], Telephone [phone], FAX [phone]

Internet: http://www.ashly.com, email: [e-mail]