Lee, Here is some more info: I/O Ports Sound Input Jack 3 The Power Macintosh 7500 and 8500 computers have a stereo sound input jack for connecting an external microphone or a line-level source. The computers provide sound digitization and recording with 16-bit samples at sample rates of up to 44.1 KHz and support Apple Computer�s speech synthesis and recognition software. The sound input jack is a 1/8-inch stereo phone jack with an additional contact to supply power to an Apple microphone. The sound input jack accepts either the Apple PlainTalk line-level microphone or a pair of line-level signals by way of a separate adapter. The sound input jack has the following electrical characteristics:
input impedance: 8000 maximum level: 2 V rms maximum gain: 22.5 dB signal-to-noise ratio: 82 dB Note The Apple PlainTalk microphone requires power from the main computer, which it obtains by way of an extra-long, 4-conductor plug that makes contact with a 5-volt pin inside the sound input jack. Sound Output Jack 3 The Power Macintosh 7500 and 8500 computers have a stereo sound output jack for connecting external powered speakers or other line-level devices. Inserting a plug into the jack disconnects the internal speaker. The sound output jack is a 1/8-inch stereo phone jack; it has the following electrical characteristics: output impedance: 37 maximum level: 0.9 V rms maximum attenuation: 22.5 dB frequency response: 20 Hz to 20 kHz, plus or minus 2 dB harmonic distortion plus noise: less than 0.05 percent at 1 V rms input signal to noise ratio: 85 dB; no audible discrete tones channel separation: 80 dB; 32 dB when 32W headphones are connected > From: Leon Sargent <[EMAIL PROTECTED]> > So. Does anyone know anything about the sound capabilities and sound > Hardware of a Mac 7300. -- PCI-PowerMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- Sonnet & PowerLogix Upgrades - start at $169 | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> PCI-PowerMacs list info: <http://lowendmac.com/lists/pci-powermacs.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive:<http://www.mail-archive.com/pci-powermacs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
