EXPIRED: FS: A Rare PAIR of SGR Mono-block power amplifier

[beetle-audio]

Item: A Rare PAIR of SGR Mono-block power amplifiers
Location: Melbourne
Price: $1250
Item Condition: Used, small chips from the paint which can be seen in the pics. The rest of the amp is in pretty good condition, it does need a good polish and touch up.
Reason for selling: Not using.
Payment Method: Pickup - Cash, Direct Deposit, COD Only
Extra Info:

 

These mono block power amplifiers were bought from a closing down studio/R&D company. They have quite an easy life as they were only used as spare. They are rated conservatively at around 200 watts/Class AB. Tested them with quite a few speakers with DAC as pre and they sounded really controlled and clean.

 

Suits anyone who wants to try out mono-block power amplifiers, those who needs/love more power or even for home theater driving the front main speakers. Due to their design, WAF is very high and they can easily go behind the speakers as well! It can also be used to drive passive sub with external crossover but it will be a waste. It takes both balance and unbalance connection.

 

Extra Info:

 

 

Size: 26W X 30H X 20D  (cm)

Weight: 8.1kg each

 
Pictures:

 

 

Edited June 28, 2017 by beetle-audio

[Janjuggler]

Hi

 

Just for clarification, is this for a pair or a single unit ?

Interested if a pair, where is possible pickup ?

 

Cheers

 

Edited June 27, 2017 by Janjuc

[Telecine]

@djb

[SGR Audio]

WOW, these are rare! Were always a great sounding amp though, same plate-amp that we used in some of our very early active speakers.

[beetle-audio]

Just to clarify, it is a pair of mono-blocks.

 

Thanks @SGR Audio for your kind words!

 

Pick up in Melbourne area.

Edited June 28, 2017 by beetle-audio

[hotJ]

Is the mute a LED light or button?

[beetle-audio]

LED disco light! I wish, just a normal LED.

[sir sanders zingmore]

16 minutes ago, beetle-audio said:

Just to clarify, it is a pair of mono-bloc

 

A pair of mono-blocs

[beetle-audio]

Yes Sir! 

Corrected Dear Sir Sanders!

 

[sir sanders zingmore]

14 minutes ago, beetle-audio said:

Yes Sir! 

Corrected Dear Sir Sanders!

 

 

Just trying to help as your lack of pluralisation has baffled everyone 

[beetle-audio]

I do appreciate it @Sir Sanders Zingmore. All corrected now.

[Marshall_SLX]

Why cant nice stuff like this come up for sale in Brisbane!!!!!!!!!!!!!!!!!!!

[Festooned]

So, is this related to any of their in-house designs or were they branded plate amps to use in active speakers? Does anyone have any images of naked ones? 

[djb]

Stuart I'm looking for amps to run true ribbons on Magnepan T 1 D panels .

Sooo will these drive a 2 ohm load?

[djb]

@andyr good idea if 2 ohm or is my aversion to class D an impediment?

[Festooned]

Why are your timpanies 2 ohm? I was under the impression that aside from having relatively poor efficiency they were a pretty benign, resistive 4 ohm load? You shouldn't need an esoteric amp to drive them.. just a run of the mill hefty one. 8)

Edited June 28, 2017 by treuben

[Festooned]

Not too many things are spec'd to run 2 ohm.. generally because then their 8-ohm efficiency will look *&(*^@#'d. Class D and the tricky switching rails according to load impedance amps are exceptions to the rules governing good old fashioned class AB amps of course.  

[andyr]

21 minutes ago, treuben said:

Why are your tympanies 2 ohm? I was under the impression that aside from having relatively poor efficiency they were a pretty benign, resistive 4 ohm load? You shouldn't need an esoteric amp to drive them.. just a run of the mill hefty one. 8)

 

As you can see from @djb's signature block - he has Tymp 1Ds.  These are 2-way ... 2x 10ohm bass panels in parallel plus 2x 8ohm tweeter panels in parallel.  So, yes ... a fairly benign load.

 

David is currently actively bi-amping his T-1Ds and wishes to add ribbons - to turn them into (active) 3-ways.  To do this, a 3rd stereo amp is required - which can drive 2ohm ribbons.

 

David - you do have another way of adding ribbons ... this is to use a passive mid LP / ribbon HP XO ... so you remain with your 2x stereo Amber amps.

 

Andy

 

[SGR Audio]

19 hours ago, treuben said:

So, is this related to any of their in-house designs or were they branded plate amps to use in active speakers? Does anyone have any images of naked ones? 

 

Not re-branded plate amps, I designed and built them from scratch to run our active speakers. The original design was a 3 channel plate-amp with integrated active crossovers, I adapted a few at the time to single channel and made them into monoblock pairs. 

[DMax]

 
Not re-branded plate amps, I designed and built them from scratch to run our active speakers. The original design was a 3 channel plate-amp with integrated active crossovers, I adapted a few at the time to single channel and made them into monoblock pairs. 

Can they drive down to 2 ohmns?

Sent from my SM-N915G using Tapatalk

[SGR Audio]

6 minutes ago, DMax said:

 

Can they drive down to 2 ohmns?

Sent from my SM-N915G using Tapatalk
 

 

 

no, 4 ohm minimum.

[gz76]

On 6/28/2017 at 11:06 AM, Sir Sanders Zingmore said:

 

A pair of mono-blocs

 

 

 

 

The pedant in me disagrees:

 

Mono-block = 1 amp

Mono-blocks = 2 amps (minimum)

A pair of mono-block amps = 2 amps

A pair of mono-blocks = 4 amps (minimum)

[sir sanders zingmore]

36 minutes ago, gz76 said:

 

The pedant in me disagrees:

 

Mono-block = 1 amp

Mono-blocks = 2 amps (minimum)

A pair of mono-block amps = 2 amps

A pair of mono-blocks = 4 amps (minimum)

 

Only if you think that it's correct to say:

a mono-blocks

 

also, mono-block = mono-block amp

and mono-blocks = mono-block amps 

Edited June 29, 2017 by Sir Sanders Zingmore

[ThirdDrawerDown]

I'm guessing there are two of these for sale, then?

[Keys1234]

Are they analogue or digital moon blocks?@beetle-audio