Operating Manual - Powerflex Multi-Channel Power Amplifier

* Powerflex 6250 shown - Powerflex 4400 only has channels 1-4.

7.REAR PANEL FEATURES

7.1Input Connectors

The Powerflex inputs use 1/4" tip-ring-sleeve (TRS) phone jacks, balanced XLR jacks, and balanced two piece "Euroblock" style connectors. The three types of connectors are wired in parallel and may be used balanced or unbal- anced. Use the euro-block connectors to daisy-chain multiple amps together . Input XLR jacks are pin 2 hot (+), meaning that a positive voltage applied to pin 2 will result in a positive output voltage across the speaker terminals. Pin 2 of the XLR jack is equivalent to the tip of the 1/4" TRS jack.

Balanced Inputs

It is recommended that balanced input connections be used whenever possible to take full advantage of the amplifier's common mode rejection properties, and to reduce ground-loop problems. The (+) signal is on pin 2 of the XLR, and the tip of the phone jack. The (-) signal is on pin 3 of the XLR, and the ring of the phone jack. If a hum problem per- sists, try connecting a balanced signal to the Euroblock input with the input cable's shield lifted at the amplifier end of the cable (ie. no ground connection), but connected to ground at the signal source. This eliminates potential ground currents through the input cable yet preserves the benefits of shield- ing.

Unbalanced Inputs

If an unbalanced XLR input connection is used, pin 3 should be connected to input ground (pin 1). If the 1/4" input jack is used unbalanced, the use of a mono (tip-sleeve) plug

 

 

 

 

 

 

Tip (+)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ring (-)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sleeve (Ground)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Stereo Phone Plug

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balanced Connection

2=(+)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

XLR Male

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3=(-)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balanced

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1=(gnd)

 

 

 

 

 

 

 

 

 

 

 

Connection

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

- +

 

 

+ -

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Euroblock

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Input Connector

Ground

Balanced Audio Connections

Tip (+)

Sleeve (Ground)

Mono Phone Plug

Unbalanced Connection

will automatically tie the (-) connection to input ground. Note: Never float the (+) or (-) input connection when using an un- balanced source. If connecting an unbalanced signal to the Euroblock input, connect the signal to (+) and the cable shield to both (-) and ground.

2=(+)

3=(gnd)

1=(gnd)

Signal (+) - +

+ -

(-) Input

 

 

Tied To

 

 

 

 

Ground

Ground

XLR Male

Unbalanced

Connection

Euroblock

Input Connector

Unbalanced Audio Connections

7

Page 6 Page 8
Page 7
Image 7
Ashly TRA-4150 manual Rear Panel Features, Input Connectors
Page 6 Page 8

TRA-4150 specifications

The Ashly TRA-4150 is a robust, high-performance amplifier designed to meet the demanding requirements of modern audio installations. Known for its reliability and exceptional sound quality, the TRA-4150 is ideal for both commercial and residential applications, including venues such as auditoriums, houses of worship, and entertainment spaces.

One of the defining features of the TRA-4150 is its power output. With a maximum output of 150 watts per channel at 4 ohms and 75 watts per channel at 8 ohms, this amplifier delivers enough power to drive a variety of speakers efficiently. It is equipped with a class AB topology, which ensures low distortion and high sound fidelity, making it suitable for critical listening environments.

The TRA-4150 boasts numerous advanced technologies designed to enhance performance and user experience. It incorporates a comprehensive protection system that includes thermal protection, short circuit protection, and DC fault protection, ensuring safe operation under various conditions. This reliability is crucial in professional settings where equipment failure is not an option.

Furthermore, the Ashly TRA-4150 features integrated signal processing capabilities, allowing users to optimize sound performance with ease. Its variable high-pass and low-pass filters enable tailored control over the audio signal, ensuring that sound output is clear and well-defined across frequencies.

Connectivity is another strong point of the TRA-4150. The amplifier supports both balanced and unbalanced input options, ensuring compatibility with a variety of audio sources and equipment. Additionally, the unit has a convenient input gain control for each channel, allowing for precise adjustment of signal levels.

The design of the TRA-4150 is both sleek and functional. The unit has a compact form factor, making it easy to integrate into existing audio setups. Furthermore, the built-in fan cooling system ensures efficient heat dissipation, which is vital for maintaining performance during extended use.

Overall, the Ashly TRA-4150 amplifier stands out in the market due to its powerful output, advanced protection technologies, and user-friendly features. Whether in a live performance setting or a fixed installation, the TRA-4150 delivers reliability and exceptional audio quality, making it a preferred choice for audio professionals and enthusiasts alike.
Top Page Image Contents