Home Speaker Asylum

General speaker questions for audio and home theater.

Congrats On Your NAF 845 Purchase!




As the owner of another Italian 845-based SET, a Mastersound Reference 845 for these past eight years. I know you'll throughly enjoy your new NAF 845-SE! I never used my amp with ESLs so I cannot comment on whether it will drive the Quads or not.

However the Mastersound I drove both my 8 ohm 88dB Alinate Pinafarina Ones, and my wife's 4 ohm 88dB Monsoon FPF-1000 ---{which JA of Stereophile described as being quite current-hungry. The magnitude hovers around 4 ohms through the upper midrange and low treble, dropping to below 3 ohms in the top two octaves. Perhaps more important is a difficult-to-drive combination of 4.5 ohms and 46 degrees capacitive phase angle at 94Hz, a frequency}--- without the slightest hint of a problem! That was before I switched to using Fostex wide-range FE208ES-R drivers in Sachiko double-back-loaded horns.

As you can see from the photo above I pulled all the stock tubes and replaced the stock 12AU7 with Mazda "chrome-plate" 6189 tubes. The stock 5687 with Bendix 6900 ---{which was like a component upgrade}--- and the stock 845s with all 845B tubes. I highly recommend playing with different tubes until you find the combo that works FOR YOU, this combo works for me.

Again my congrats on buying a fine Italian 845-based SET, integrated, amp. May you have many enjoyable years ahard of you...

Thetubeguy1954 (Tom Scata)

SETriodes Forum -- Central Florida Audio Society -- Fullrange Drivers
==============================================================
"The man that hath no music in himself nor is not moved with concord of
sweet sounds is fit for treasons, stratagems and spoils."
- William Shakespeare
Thetubeguy1954 (Tom)

Central Florida Audio Society -- SETriodes Group -- Space Coast Audio Society
Full-range/Wide-range Drivers --- Front & Back-Loaded Horns --- High Sensitivity Speakers



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  • Congrats On Your NAF 845 Purchase! - thetubeguy1954 10:56:14 11/28/10 (0)

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