Parasound A 23 - Manuals

YOU SHOULD KNOW Balanced XLR Jacks and Their Pin Configuration The balanced inputs of the A 23 use XLR jacks that conform to the industry standard of: Pin1: Ground, Pin 2: Positive (+), Pin 3: Negative (--). The balanced outputs on some componentsuse terminals with 3 screws instead of XLR jacks. The...

Left and Right Unbalanced Inputs Use these inputs if your preamplifier or surround controller doesn’t have balanced output connectors or if you simply prefer to use unbalanced connections. What You’ll Need: • One standard pair of shielded interconnect cables with RCA plugs • A source component with ...

Loop Out Connector The Right and Left Loop Out jacks provide connections to route the same input signals fromyour preamplifier or surround controller to an additional power amplifier. In most instances,you won't use the loop out feature so you can skip this section. What You’ll Need: • One standard ...

YOU SHOULD KNOW Correct Speaker Polarity is Important Polarity refers to + and – connections. Speaker wires are coded with printing or a ridge on theinsulation on one of the leads so you know which lead was connected to the + and – terminalsat the other end. This coding will help you keep the + and ...

3 1 C A U T I O N 5 4 8 2 Right Left Components S u r ro u n d S o u n d C o n t ro l l e r P re a m p OUTPUTS Dual Banana Plug Single Banana Plug Spade Lug Stripped AWG wire Common speaker connectors Red ususally designates right The GND notch signifies ground or speaker left S p e a k e r 7 6 In c...

You can manually turn the A 23 on and off with its front panel On-Off button. It can also be triggered to turn on and off automatically when your preamplifier, surround controller, or system controller is turned on and off. Manual On-Off from the Front Panel If you want to manually turn on and off t...

CONNECTING AN EXTERNAL DC SOURCE FOR AUTOMATIC ON-OFF If you want to automatically turn on and off the A 23 with an external DC voltage, choose the DC Triggering option by moving the Auto Turn On switch on the rear panel to its lower 12V position. What You’ll Need: • A cable with a 2.5 mm sub-mini p...

Whenever the A 23 is turned on either manually or automatically, there is 12 Vdc present at itsown DC Trigger Out jack so it can trigger additional amplifiers or other components on and off. What You’ll Need: • A cable with a 2.5 mm sub-mini plug on each end (in addition to the one provided with the...

A B G C D E F UNDERSTANDING THE INDICATORS ON THE A 23 AC Present Indication When the A 23 is plugged into a live AC outlet, a soft blue halo glows behind its On-Off button and its red “P” Badge glows faintly. These indicate that the unit is plugged into a live AC outlet,even when it is turned off. ...

AC Power Connections We recommend that you plug your A 23 into the same AC wall outlet or power strip that powers your other audio components, especially the preamplifier or system controller. Having all the audio components on the same power circuit helps prevent hum caused by possible ground loops...

MAINTAINING YOUR A 23 Your Parasound A 23 power amplifier requires no periodic maintenance and has nouser-serviceable parts inside. To avoid the risk of electric shock, do not remove its top cover.The amplifier’s exterior can easily be cleaned with a soft cloth pre-moistened only with a fewdrops of ...

TROUBLESHOOTING GUIDE 13 A 23 will not turn off when audio signal is removed PROBABLE CAUSE Power cord is disconnected REMEDY Hum and / or buzz through speakers Ground loop between preamplifier and A 23 or at the equipment rack Move the Ground Lift switch to its Lift position Install nylon shoulder ...

SERVICING YOUR A 23 14 If All Else Fails –Call Us for Help Call your Parasound dealer or Parasound’s Technical Service Department toll free at 1-866-770-TECH (8324). We can often solve the problem with simple diagnostic tests you canperform yourself. If we determine that your A 23 will need further ...

Audio Trigger Sensitivity Adjustment The Audio Sensitivity Control sets the thresholdof the audio trigger signal. You can adjust thislevel from a maximum sensitivity of 50 mV (fullycounterclockwise) to a minimum sensitivity of 200 mV(fully clockwise). If you set this control to 50 mV, the A 23might ...

TECHNICALLY SPEAKING continued 16 Choosing Brands of Interconnect Cables andSpeaker Wire We are often asked to recommend specificinterconnect cables and speaker wire. It’s true thatwith some amplifiers, sound quality will vary greatlyaccording to interconnect cables and speaker wires.However, Paraso...

PARASOUND A 23 DESIGN OVERVIEW 17 To create the +/- 55 Vdc B+ and B- supply rails for eachchannel, we use high-speed rectifier diodes and fourenormous 12,000 uF Elna electrolytic filter capacitors,chosen for their low Equivalent Series Resistance(ESR) and dielectric absorption. In addition, thesefil...

PARASOUND A 23 DESIGN OVERVIEW continued 18 Parasound power amplifiers incorporate ingeniousand fast-acting DC servo circuits, completelyeliminating the need for coupling and blockingcapacitors. The A 23 is direct-coupled from its inputjacks to its speaker terminals. This advanced circuitrynever nee...

Continuous Power Output - Stereo 125 watts RMS x 2, 20 Hz-20 kHz, 8 Ω , both channels driven 200 watts RMS x 2, 20 Hz-20 kHz, 4 Ω , both channels driven Continuous Power Output - Mono 400 watts RMS, 20 Hz-20 kHz, 8 Ω Current Capacity 45 amperes peak per channel Slew Rate > 130 volts per microseco...