Ashly 4400 User Manual

PowerflexTM 4400 Four Channel Power Amplifier

Architects Specifi cations

Powerflex-4400 Four Chanel Amplifier

The power amplifier shall be a multichannel unit consisting of
four independent channels. Each amplifier shall be able to deliver
275 watts into 8 ohms, or 400 watts into 4 ohms. In addition,
bridged pairs shall be able to output 800 watts each into 8 ohms.

The amplifier shall have a gain of 30.1dB and an input sensitivity
of 1.25 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
the input module to select chassis or floating ground operation.

Technical Notes & Specifications

The inputs shall be active balanced design, with an impedance of
10K ohm accessible with combination XLR - 1/4” jacks and euro­block 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 4400 manufactured by Ashly
Audio, Inc.

• Four Channel Amplifier - 275W/Ch @
8 Ohms, 400W/Ch @ 4 Ohms

• 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”, Euroblock 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 PowerflexTM 4400
*Power Output
(Maximum Average Power, 0.1% THD, 1KHz)

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

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

Rated Per Channel, Two Channels Driven
4 ohm: 400 Watts RMS
8 ohm: 275 Watts RMS
Mono Bridged (1 Channel)
8 ohm: 800 Watts RMS

Rated Per Channel, All Channels Driven
4 ohm: 400 Watts RMS†
8 ohm: 275 Watts RMS
Mono Bridged (2 channels)
8 ohm: 800 Watts RMS

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:
(IHF) @ 8 ohms: <0.1% (throughout power range)

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

Full Power Input Sensitivity: 1.47V RMS (5.6dBu)

Frequency Response:

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

* 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

<0.2% (throughout power range)

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

Typical Idle Current
120V: 0.9A
240V: 0.5A

Current with Typical Audio Program Material (4 ohm load x 4 Channels)
120V: 7A
240V: 3.5A

Connections
Input: XLR - 1/4” (Pin 2: Hot, Tip: Hot), Euroblock
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: 46 lbs. net, 53 lbs. shipping

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

Powerflex 4400 Rear Panel

Applications:

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

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]