Dear Mark,
Actually the 2200 was finished after I left SAE and I have susequently upgraded
a few of them. To my knowledge there is no reason why this unit was rated that
way. It easily puts out significantly more power into 4 ohms. Anyway, almost
all of the SAE amps can have the limiters either modified or removed but, as I
stated previously, do this at your own risk. The only drawback would be the
inadvertant and/or unintentional short at the output which probably would wipe
out the output devices. This is why, on my first big SUMO amps, the "Power" and
the "Half-Power", I put a true input output realtime frequency
comparator-discriminator which had no limiters of any kind in the signal path.
It was impossible to blow up the amp. Yet, it would drive any load conceivable
to mankind.
James Bongiorno
Mark Gurries wrote:
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From: Mark Gurries <gurriesm@...>
Wardsweb wrote:
From: "Wardsweb" <wardsweb@...>
JB - thanks for the insight. As far as type, will this work with the later
Computer Direct-Line? The only other amp I have is a 3100, but mainly I
use A501 and A502's. I would definitly look into this, if it would work
for an A1001.
Luther
----- Original Message -----
From: sstinc: First sstinc:Last
To: SAE_Talk@...
Sent: Sunday, January 30, 2000 1:26 AM
Subject: Re: [SAE_Talk] SAE Owner's Showcase
Dear Luther,
Depending on what SAE amps you have, they certainly can be adjusted to
drive electrostatics. When I worked there, Morris was OVERLY concerned
about protection circuits mainly because he didn't at that time understand
the true nature of VA loadlines. Most engineers STILL don't understand the
situation. A properly designed amplifier should be perfectly capable of
driving any rated VA into a load in ALL FOUR QUADRANTS. However, this ends
up being a true enigma because in order to protect against a true short
circuit, volt-amp limiting must be used. You can modify or remove the
limiters with no adverse effects AS LONG as you don't short the outputs. 2
ohm reactive loads should not be a problem assuming that the music you
listen to has a reasonable dynamic range.
If anyone wants to delve into this situation I'll be happy to discuss
this situation further.
James Bongiorno
Hi James,
Which SAE amps you would consider fall into this category of capability
or stated another way, which amps would you NOT recommend.
Also, the SAE 2200 was rated for 100W into 8 and 4 ohms. Why is the
power rating for 4 ohms the same as the 8 ohms? I would think the 4 ohm
rating would be around 150Watts.
Best Regards,
Mark Gurries (replying from home)
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Battery Charging and Power Systems Application Engineer
Linear Technology,1630 McCarthy Blvd, Milpitas, CA, 95035
WRK(408) 954-8400 x3864 Email: gurriesm@...
FAX(408) 428-9413 WebSite:
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