On 5/05/2016 4:44 PM, Eiron wrote:
On 05/05/2016 07:17, Don Pearce wrote:
On Thu, 5 May 2016 15:12:49 +1000, Trevor Wilson
wrote:
http://me-au.com/me850data2.jpg
It will even survive the crowbar protection system (until that
protection system is destroyed).
Why would anyone design that amplifier and say it is for music? One of
the most pointless specs I've ever read. You're just ****ing your
money away if you buy that.
Because of the Australian fashion for designing speakers with impedances
that drop to zero at the crossover frequencies.
**I have scanned and uploaded three crossover diagrams from several
Infinity models:
Quantum Line Source (QLS):
The QLS used a VERY heavy, mica coated, clay loaded, 30cm paper cone
'Watkins' bass driver in a large, sealed enclosure. The driver employed
two voice coils. VC1 is a 4 Ohm rated coil and VC2 is a 2 Ohm rated
coil. Very tough to drive, but fabulous sounding system, with, arguably
the best bass of any Infinity speaker.
RS2.5:
The RS2.5 used a single polypropylene, 30cm 'Watkins' bass driver in a
large, sealed enclosure. A ******* of a speaker to driver, with a flabby
bottom end, likely due to the poor piston properties of the bass driver.
RS4.5:
The RS4.5 used two 'Watkins' bass drivers in a very large, sealed
enclosure. Possibly the worst speaker load I've ever encountered. Just
horrible. Destroyer of amplifiers and requiring HUGE gobs of current in
the bottom end. Prodigious, if quite flabby and ill-defined bass. The
mids and highs were easier, being substantially resistive in nature, but
still hovered around 3 Ohms for most of the range.
Crossover schematics:
http://postimg.org/gallery/29r95sbwy/
--
Trevor Wilson
www.rageaudio.com.au
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MOSFET amp thump.
Hybrid Mode
