AV25-2 NET AV25-2 NET+ AV25-2 NET Series Owner’s Manual June 2012 www.stewartaudio.
Important Safety Instructions Before using your Stewart Audio Inc. Power Amplifier, please read this Owner’s Manual carefully to ensure optimum trouble-free performance. WARNING: TO REDUCE THE RISK OF ELECTRICAL SHOCK, DO NOT EXPOSE THIS AMPLIFIER TO RAIN OR MOISTURE. DANGEROUS HIGH VOLTAGES ARE PRESENT INSIDE THE ENCLOSURE. DO NOT OPEN THE CABINET. REFER SERVICING TO QUALIFIED PERSONNEL ONLY. CAUTION 3.
Table of Contents Important Safety Instructions······························································ 2 Table of Contents ················································································ 4 1 Welcome ························································································· 5 1.1 Features ··············································································· 5 1.
2.2.1 Universal-Mount Installation 2 Setup 2.1 Setup Precautions CAUTION: Before installing your amplifier, make sure that you have read the Important Safety Precautions at the beginning of this manual. The AV25-2 NET+ also has a universal bracket available which allows the unit to be mounted against a wall or under a table. Two screws are included in the kit which will affix the bracket to the top or the side of the unit. Once this is done, two holes are available for mounting the unit where desired. 2.
2.2.3 Product Dimensions 2.4 Input Connections (NET+ Model Only) 6.00in 15.3cm 1.25in Your AV25-2 NET+ amplifier is provided with a 3-pin Phoenix connector for each input. This connector will accept both balanced or unbalanced connections, however some modifications must be made for an unbalanced connection. See the next two sections for instructions on connecting your amplifier to its input source. 3.2cm AV25-2 NET+ 2.4.
2.4.2 Unbalanced Input Connections When using an unbalanced input source and connector, a jumper must be added between the negative (-) terminals and the ground terminals. Once this has been done, the unbalanced source can be connected to the positive (+) and ground terminals. Please refer to the manual of your input source in case it does not follow the standard pin-out. For your convenience, pre-wired connectors are available for purchase, see the next page for details.
2.5 Output Connections Stewart Audio recommends using high-quality, heavy-gauge speaker wire and connectors to send the output signal of your amplifier to the speakers. Use the following table as a guideline when selecting your wire gauge. Distance Wire Gauge Up to 25 ft. 16 AWG 26-40 ft. 14 AWG 41-60 ft. 12 AWG Terminal Block Connector (Rear of AV25-2 NET) + - + - + - Channel 1 + 3.1 Operating Precautions 1.
3.
3.2.1 Indicators 3.3 CobraNet The AV25-2 NET series has up to 4 rear panel LED indicators. The first is the power indicator which will illuminate when power is supplied to the amplifier. The second light is the signal present LED which will illuminate when signal is detected on either one of the input connection channels. The final 2 LED indicators (only on the NET+ models) are the “Clip” indicators, one for each channel.
Q: What submap channels do the AV25-2 NET+ use? A: Since the AV25-2 NET+ is a 2-channel device, only the first two submap channels are valid (channels 1 and 2). Data sent on channels 3-8 will be ignored. 3.3.2 Using CobraNet Discovery Utility The CobraNet Discovery utility can be downloaded from the Cirrus Logic website at: http://www.cobranet.info/downloads/disco Once installed, it should be launched from a computer on the same network as the AV25-2 NET+.
3.4 Remote Volume Control (NET+ Models Only) AV25-2 NET+ amplifiers can have their volume remotely controlled (or muted) via the Euro Block input on the rear of the amplifier. The remote volume control allows the units volume to be controlled through the use of an external potentiometer which can be located wherever convenient for the user. Remote muting is also useful for fire-alarm situations in which all unnecessary sound must be silenced. 4 Troubleshooting Problem: Power indicator does not turn on.
5 Technical Specifications 6 Warranty Information Maximum Output 30Hz - 20kHz Stereo 25W @ 8Ω per channel 6.1 Warranty Summary 35W @ 4Ω per channel Frequency Response (+0, -3 dB) 30Hz-20kHz Bandwidth +/- 3.0dB 30Hz-30kHz THD+N <0.1% Signal to noise ratio >100dB Remote Volume Control 0-10V DC, 4 Pin Euro Block External Mute 5-12VDC Slew Rate 30V/ms Input Sensitivity 0.5V (-3 dBV) Standard Voltage Gain 28X (26.
6.2.1 Return Authorization Number All returns to the factory for service must be accompanied by a Return Authorization (RA) number. One can be obtained by contacting Stewart Audio at (209) 588-8111 or via e-mail at support@stewartaudio.com. NOTE: Any defective products received without an RA number will be returned to sender at their expense. If Stewart Audio is unable to contact the sender in 14 days, the merchandise will be considered scrap and may be disposed of. 6.2.
7 Accessories 8 Notes The following accessories are available from Stewart Audio for your amplifier. All part numbers shown are Stewart Audio Part Numbers. Mounting Brackets AV-POLE Pole-mount bracket for AV Series amplifiers AV-BRACKET Universal mounting bracket for AV Series amplifiers Connection Adapters ADPT-RCA Mono Female RCA to male Euroblock. ADPT-SUMRCA Stereo Female RCA to male Euroblock. ADPT-SUM35 Stereo Female 3.
