Balanced Inputs, Unbalanced Inputs, Modes

Introduction

Your new Yorkville AP2020 power amplifier is designed and built to provide years of trouble free performance. The AP2020 combines the field proven reliability of our Audiopro amplifiers with customer requested features such as switchable limiters, a Mono/Stereo/Bridge switch, and SPEAKON™ output connectors as well as binding posts.

The AP2020 weighs a comfortable but solid 35 pounds, fits into two rack spaces, and reproduces music with over 2000 Watts of headroom. It will drive reactive phase shifted loads with no difficulty - even though it is fully protected from acciden- tal short circuits. Our design goal was to create an amplifier, which would do exactly what an amplifier should do: reproduce music with great power, complete reliability, and uncompromising signal fidelity. We think you will agree that the Yorkville AP2020 does exactly that.

Inputs

Balanced Inputs

Either XLR or two–circuit ‘Ring, Tip, Sleeve’ Stereo ¼-inch PHONE cords may be used. Each channel’s XLR input is inter- nally paralleled with its phone input (The TIP of the channel ‘A’ PHONE input is connected to pin 2 of its XLR input, the RING is connected to pin 3, and the Sleeve is connected to PIN 1). PIN 2 is in phase, PIN 3 is 180 degrees out of phase, and PIN 1 is ground. We recommend using balanced lines for the best hum- free performance, particularly when chaining multiple amplifiers.

Unbalanced Inputs

Ordinary single circuit Standard ¼-inch PHONE plugs may be used to connect unbalanced signals.IMPORTANT NOTE: Such plugs effectively connect the ring terminal to sleeve ground, so they work correctly. However, if you use a Stereo ¼-inch PHONE plug on an unbalanced line, you MUST short the Ring terminal to the sleeve terminal, otherwise the sensitivity will be

6 dB lower than is specified! (The same applies to the XLR input: To connect an unbalanced source via the XLR input, you must connect the signal to Pin 2 and ground BOTH Pin 1 and Pin 3).

Remote Referencing

You can approach balanced performance with unbalanced sources by utilizing the remote reference feature of the AP2020. Connect a balanced cable to the AP2020 just as you would if you were running a balanced line. At the other end, connect Pin 3 and Pin 1 together, (or connect ring to sleeve if you are using a PHONE plug cable), and plug this modi- fied end into your unbalanced piece of equipment. This con- nection enables the AP2020’s input to look down the cable directly at the output jack of the unbalanced equipment. Any hum voltage generated across the cable’s impedance will be attenuated by the common mode rejection of the AP2020.

Driving Multiple AP2020’s

In large installations it is often desirable to operate many amplifiers in tandem. Since each channel’s XLR input is inter- nally paralleled with its phone input, you may use the remain- ing input jack as an output to the next amplifier. Obviously you will need both XLR to XLR and PHONE to PHONE patch

cords if you are going to tandem more than two amplifiers.

NOTE: These patch cords MUST be balanced whether the input signal is balanced or unbalanced!

Ground Switch

Switching the ground switch on the rear panel will disconnect chassis ground from circuit ground. Safety (earth) ground is still connected to the chassis. We do not recommend lifting the ground strap unless you are experiencing problems with ground loop hum in multiple amplifier setups where lifting the ground straps of all but one amplifier cures the hum problem

CAUTION: Sometimes hum problems are an indication of improper AC wiring somewhere else in your system. Don’t just doctor the symptom by lifting grounds. Fix the cause by making sure that the proper electrical wiring safety regula- tions have been adhered to.

Modes

The AP2020 can be configured for dual-MONO, STEREO, or BRIDGED MONO operation via this rear panel MODE switch. The following is a description of each mode:

Mono Mode

•Channel A & B inputs are paralleled.

•Each gain control adjusts the signal level for its respective channel

•Output signals are of equal phase.

•Two loads are driven.

•Loads are connected between the BLACK and RED post on each channel.

AP2020 specifications

Yorkville Sound AP2020 is a well-regarded audio power amplifier that showcases the brand’s commitment to delivering high-quality sound reinforcement in a reliable package. Designed for both professional audio environments and personal use, the AP2020 stands out due to its remarkable features and innovative technologies.

One of the key characteristics of the AP2020 is its robust power output. It delivers up to 2000 watts of peak power, making it suitable for a variety of applications including live performances, installations, and studio work. Its lightweight, durable design ensures that it can withstand the rigors of transportation while remaining portable for easy setup and operation.

The amplifier utilizes advanced Class D technology, which not only provides excellent audio fidelity but also enhances energy efficiency. This means less power consumption and reduced heat generation, making the AP2020 an environmentally friendly choice while maintaining high performance.

The AP2020 is engineered to deliver crystal-clear sound across a broad frequency response range. Its built-in high-pass and low-pass filters allow for seamless integration with different speaker systems, maximizing audio clarity and minimizing distortion. Additionally, the amplifier features adjustable input sensitivity, providing users with the flexibility to connect various sources and optimize the signal level to suit their specific needs.

For enhanced protection, the AP2020 incorporates several safety features, including short-circuit protection, thermal overload protection, and DC output protection. These safeguards ensure the reliability and longevity of the amplifier, preventing damage under extreme operation conditions.

Connectivity options are also plentiful, with balanced XLR and TRS input jacks that accept a wide array of input sources. The amplifier also includes binding posts and Speakon outputs, making it compatible with a range of speaker configurations.

In summary, the Yorkville Sound AP2020 combines powerful performance with innovative technology, making it an ideal choice for professionals seeking reliable and high-quality audio amplification. Its user-friendly features, robust design, and advanced protection systems make it a valuable addition to any sound system setup, catering to the diverse needs of audio engineers, musicians, and technicians alike. Whether for live events or permanent installations, the AP2020 stands as a testament to Yorkville Sound's dedication to excellence in audio engineering.