Forte Model 1A inputs max voltage - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

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
Thread Tools Search this Thread
Old 6th December 2005, 07:37 AM   #1
diyAudio Member
Join Date: Nov 2003
Location: Atlanta
Default Forte Model 1A inputs max voltage


Anybody here knows what the max input voltage for the Forte model 1A is? I'm trying to match it with a dac, and want to make sure I can get as much volume as possible out of the setup...

The dac I'm looking at is a bel canto dac 1 (I think it is a 2 volt output)

  Reply With Quote
Old 7th December 2005, 07:19 PM   #2
The one and only
Nelson Pass's Avatar
Join Date: Mar 2001
I seem to remember a 26 dB gain figure, so you would get
50 watts from a 20 volt output. As 26 dB is a factor of 20,
the input voltage becomes 1 volts rms, 1.4 volts peak.
  Reply With Quote
Old 17th December 2005, 09:20 PM   #3
diyAudio Member
Join Date: Nov 2003
Location: Atlanta
I did not understand anything from the math involved ( can't make sense of it even though there are only a couple of numbers) but I got the answer

1 to 1.4 max. Thaks,
  Reply With Quote
Old 17th December 2005, 09:33 PM   #4
diyAudio Member
jacco vermeulen's Avatar
Join Date: Oct 2004
Location: At the sea front, Rotterdam or Curaçao
Send a message via Yahoo to jacco vermeulen
Double power is 3 dB more, 2 watts in your loudspeaker gives you 3 dB more sound pressure than 1 watt.

Double voltage is 6 dB more, from 1 to 2 volts is 6 dBV, from 2 to 4 is again 6 dbV.
From 1 volt to 20 volt is around 26 dB.

Input voltage of the Forte 1 (40 watts) was "about" the same.
Good thing Mr Pass built your 1A, not you.
Run Devil Run
  Reply With Quote
Old 23rd December 2005, 04:02 PM   #5
diyAudio Member
Join Date: Nov 2003
Location: Atlanta

I got another question regarding this amplifier, Would it be driven by a DAC that requires a minimum 10k ohms input impedance (CAL dac)?
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Forte Audio Model ONE WolfgangL Pass Labs 1 23rd February 2011 02:04 PM
Forte Model 4a Heiney9 Pass Labs 3 16th July 2007 09:44 PM
Forte Model 1A inputs impedance cuencano Pass Labs 2 26th December 2005 10:58 PM
FS Forte' FT1 5ch amp and model 3 power amp bender460 Swap Meet 5 13th October 2005 10:17 PM
Forte Audio Model 3 Power Amp. celonaf Pass Labs 3 25th November 2004 07:35 AM

New To Site? Need Help?

All times are GMT. The time now is 12:08 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.
Copyright ©1999-2015 diyAudio

Content Relevant URLs by vBSEO 3.3.2