Input signal
 User Name Stay logged in? Password
 Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read Search

 Pass Labs This forum is dedicated to Pass Labs discussion.

 Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
 12th June 2004, 04:35 PM #1 Odysei   diyAudio Member   Join Date: Jun 2004 Location: Vilnius Input signal How strong an input signal should be to make any of the Zen amps to do it's maximum amplification? And another question. What's the most common voltage of the input? How does it effect the sound?
 12th June 2004, 06:38 PM #2 jan.didden   diyAudio Member     Join Date: May 2002 Location: The great city of Turnhout, BE The amplification would not change with the input voltage (although there may be some compression). If you calculate backwards, from the max output power and the load impedance you find the max output voltage. Alternatively, you can take the max output voltage to be the total supply voltage minus some 4-6V. This is the p-p output voltage. For instance, with 40V total supply, the p-p output will be around 34 V, which is 17V peak, which is about 12V rms. Divide that by the amp gain. Suppose the gain is 10, then you need 1.2V rms at the input to get max output power. Jan Didden __________________ Music is dither to the brain; lets me think below the usual chaos - me Get more Linear Audio for less! Check out my Autoranger and SilentSwitcher
 13th June 2004, 03:33 AM #3 Nelson Pass   The one and only     Join Date: Mar 2001 Typical Zen amp gain is 10 to 16 dB, so you'll need more than that. In the 16 dB case, it takes about 1.5 Volts to get up to 10 watts, but about 3 volts in the 10 dB case. In all these amps, you can set the gain and input impedance arbitrarily, but there are always tradeoffs in performance.
 13th June 2004, 11:08 AM #4 Odysei   diyAudio Member   Join Date: Jun 2004 Location: Vilnius So in order to get 30W at the output for example at the Penultimate Zen (ZV4) we need 3 Volts and 1 Amp at the input? So the amplifiers gain would be 10db?
 13th June 2004, 02:21 PM #5 jh6you Account Disabled   Join Date: Aug 2002 Location: Near to the Pacific Ocean My opinion: If your source output impedence is equal to or lower than about 10% of ZV4 input impedence, you do not need 1 Amp at the input because your source could be reasonably assumed as a stiff voltage source. By the way: Jan Didden, Are you a man looking like a lady or a lady talking like a man? JH
 13th June 2004, 02:23 PM #6 jan.didden   diyAudio Member     Join Date: May 2002 Location: The great city of Turnhout, BE I'm a man who likes a lady. Does that help? Jan Didden __________________ Music is dither to the brain; lets me think below the usual chaos - me Get more Linear Audio for less! Check out my Autoranger and SilentSwitcher
 13th June 2004, 02:32 PM #7 jh6you Account Disabled   Join Date: Aug 2002 Location: Near to the Pacific Ocean Off-topic: Ehem... You know? I'm a man who likes girls. JH
 13th June 2004, 02:37 PM #8 jan.didden   diyAudio Member     Join Date: May 2002 Location: The great city of Turnhout, BE Well, you know, you can't win them all. Keep trying! BTW, You probably don't recognise the picture, but without this lady your internet connection would be much slower and primitive than it is. (Yes SY, this is a pointer to you!). If you talk about shakers and movers in internet land, she is one of the more influential. Looking deceptively ladylike, I know. Looks can be deceiving, both ways. Jan Didden __________________ Music is dither to the brain; lets me think below the usual chaos - me Get more Linear Audio for less! Check out my Autoranger and SilentSwitcher
Nelson Pass
The one and only

Join Date: Mar 2001
Quote:
 Originally posted by Odysei So in order to get 30W at the output for example at the Penultimate Zen (ZV4) we need 3 Volts and 1 Amp at the input? So the amplifiers gain would be 10db?
More Like 3 volts and 3 mA.

 14th June 2004, 08:54 AM #10 Odysei   diyAudio Member   Join Date: Jun 2004 Location: Vilnius But this can't be 3 Volts and 3mA, if we amplify 3mA 10db we'll get 30mA and if 16db that would be just 0.12 A . If we use stronger source let's say 3 Volts and 30 mA then we'll get at 10db 0.3A and at 16db 1.2A. Am I right?

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off Forum Rules
 Forum Jump User Control Panel Private Messages Subscriptions Who's Online Search Forums Forums Home Site     Site Announcements     Forum Problems Amplifiers     Solid State     Pass Labs     Tubes / Valves     Chip Amps     Class D     Power Supplies     Headphone Systems Source & Line     Analogue Source     Analog Line Level     Digital Source     Digital Line Level     PC Based Loudspeakers     Multi-Way     Full Range     Subwoofers     Planars & Exotics Live Sound     PA Systems     Instruments and Amps Design & Build     Parts     Equipment & Tools     Construction Tips     Software Tools General Interest     Car Audio     diyAudio.com Articles     Music     Everything Else Member Areas     Introductions     The Lounge     Clubs & Events     In Memoriam The Moving Image Commercial Sector     Swap Meet     Group Buys     The diyAudio Store     Vendor Forums         Vendor's Bazaar         Sonic Craft         Apex Jr         Audio Sector         Acoustic Fun         Chipamp         DIY HiFi Supply         Elekit         Elektor         Mains Cables R Us         Parts Connexion         Planet 10 hifi         Quanghao Audio Design         Siliconray Online Electronics Store         Tubelab     Manufacturers         AKSA         Audio Poutine         Musicaltech         Aussie Amplifiers         CSS         exaDevices         Feastrex         GedLee         Head 'n' HiFi - Walter         Heatsink USA         miniDSP         SITO Audio         Twin Audio         Twisted Pear         Wild Burro Audio

 Similar Threads Thread Thread Starter Forum Replies Last Post rs1026 Chip Amps 4 18th April 2007 05:12 AM Progg70 Analog Line Level 2 27th August 2005 05:51 PM Florian Digital Source 12 4th August 2005 12:41 AM falcott Parts 2 5th September 2004 03:45 AM Dj BASS AMP Solid State 9 13th August 2003 02:16 PM

 New To Site? Need Help?

All times are GMT. The time now is 02:59 AM.