[robb]

Hello

I recently purchased the Bryston 4b sst2 amplifier and want to purchase a Torus for use solely with it. 

Can anyone tell me the minimum (cheapest) Torus to use with it to ensure maximum, unrestricted dynamics from the amp . I am thinking the model 10 Torus would be ok?

Thanks for any advice.

Rob

[James Tanner]

Hi  Rob

Yes the 10 or the 15 will be fine,

james

[werd]

You can get 240v with the rm15.

[95Dyna]

Hi Robb,

The Torus website advises that you deploy the unit that just exceeds the amp draw of your system (see link below).  As its name suggests the 4B SST2 has a maximum amp draw of around 4 amps.  Considering you will want to connect your pre and source components the RM/CS 5 will be very tight and the RM/CS 10 will do just fine perhaps with room to spare.  Don't be thrown off by the "hi end, mid-range" system analysis which to me is imprecise.  Use the advice to count amp draws then size accordingly.  Remember, the 4 amps on the 4B is at maximum power usage and the real world composite draw will be less.  If you want to spend more money go for the 15 but any sonic advantage may not be worth the extra expenditure.

http://www.toruspower.com/customer.htm

BTW, I have a pair of 7B SST2's and will be using the CS 15.  The only way I would tax the 15 would be to run the 7's at full power (1800 W into 4 ohms) which would blow the windows out of my house and send me packing to the ear, nose and throat specialist!

Regards,


Bill

[Robert D]

Robb

I posted this not to long ago when my B-Day gift Arrived
I have 2 x 4B SST2

My new Torus Rm 20 has made a Statement.
The sound stage has opened up even more so.
The sound imaging has changed. Even more present.
The presence of the sound has made a Statement
A big step forward once again.

Robert

[srb]

As its name suggests the 4B SST2 has a maximum amp draw of around 4 amps.

Per the 4B SST2 manual, maximum power consumption is
 
2 channels @ 300W @ 8 ohms - 1280 Watt
2 channels @ 500W @ 4 ohms - 2100 Watts
 
which would be 10.7A / 17.5A if line voltage is 120V, or 5.35A / 8.75A at 240V.
 
 
Steve
 [/]

[alexone]

As its name suggests the 4B SST2 has a maximum amp draw of around 4 amps.

Per the 4B SST2 manual, maximum power consumption is
 
2 channels @ 300W @ 8 ohms - 1280 Watt
2 channels @ 500W @ 4 ohms - 2100 Watts
 
which would be 10.7A / 17.5A if line voltage is 120V, or 5.35A / 8.75A at 240V.
 
 
Steve
 [/]

then a Torus RM8 (Int'l German) would be ok for a 4B SST?


al.

[srb]

then a Torus RM8 (Int'l German) would be ok for a 4B SST?

I was just pointing out that based on the Bryston specs, maximum power consumption would seem to be more than 4A.
 
Based on the RM8 Int'l Ger specs of 240V/8A input, it looks to me like it should just do it.  The power consumption specifications of the 4B SST2 are at maximum power with both channels driven.
 
But I'm not a Torus expert, so I would defer to recommendations from Torus or Bryston.
 
Steve

[werd]

Hi Robb,

The Torus website advises that you deploy the unit that just exceeds the amp draw of your system (see link below).  As its name suggests the 4B SST2 has a maximum amp draw of around 4 amps.  Considering you will want to connect your pre and source componenets the RM/CS 5 will be very tight and the RM/CS 10 will do just fine perhaps with room to spare.  Don't be thrown off by the "hi end, mid-range" system analysis which to me is imprecise.  Use the advice to count amp draws then size accordingly.  Remember, the 4 amps on the 4B is at maximum power usage and the real world composite draw will be less.  If you want to spend more money go for the 15 but any sonic advantage may not be worth the extra expenditure.

http://www.toruspower.com/customer.htm

BTW, I have a pair of 7B SST2's and will be using the CS 15.  The only way I would tax the 15 would be to run the 7's at full power (1800 W into 4 ohms) which would blow the windows out of my house and send me packing to the ear, nose and throat specialist!

Regards,


Bill

get the 20 amp dyna, its only a couple hundred more. Maybe less now

[James Tanner]

The new CS-15 or RM-15 is the best value right now.



james

[95Dyna]

Hi Robb,

The Torus website advises that you deploy the unit that just exceeds the amp draw of your system (see link below).  As its name suggests the 4B SST2 has a maximum amp draw of around 4 amps.  Considering you will want to connect your pre and source componenets the RM/CS 5 will be very tight and the RM/CS 10 will do just fine perhaps with room to spare.  Don't be thrown off by the "hi end, mid-range" system analysis which to me is imprecise.  Use the advice to count amp draws then size accordingly.  Remember, the 4 amps on the 4B is at maximum power usage and the real world composite draw will be less.  If you want to spend more money go for the 15 but any sonic advantage may not be worth the extra expenditure.

http://www.toruspower.com/customer.htm

BTW, I have a pair of 7B SST2's and will be using the CS 15.  The only way I would tax the 15 would be to run the 7's at full power (1800 W into 4 ohms) which would blow the windows out of my house and send me packing to the ear, nose and throat specialist!

Regards,


Billhttp://www.toruspower.com/shopping/shopdisplayproducts.asp?id=2&cat=Torus+Power+Isolation+Units+%96+120V+Series

get the 20 amp dyna, its only a couple hundred more. Maybe less now

That is not accurate, werd.  The price difference between the RM/CS 15 and 20 is $1K.  Check it out:

http://www.toruspower.com/shopping/shopdisplayproducts.asp?id=2&cat=Torus+Power+Isolation+Units+%96+120V+Series

I just noticed that the price difference between the 10 and 15 is only $200.00 so James is right that the 15 is the best value right now.

[werd]

Hi Robb,

The Torus website advises that you deploy the unit that just exceeds the amp draw of your system (see link below).  As its name suggests the 4B SST2 has a maximum amp draw of around 4 amps.  Considering you will want to connect your pre and source componenets the RM/CS 5 will be very tight and the RM/CS 10 will do just fine perhaps with room to spare.  Don't be thrown off by the "hi end, mid-range" system analysis which to me is imprecise.  Use the advice to count amp draws then size accordingly.  Remember, the 4 amps on the 4B is at maximum power usage and the real world composite draw will be less.  If you want to spend more money go for the 15 but any sonic advantage may not be worth the extra expenditure.

http://www.toruspower.com/customer.htm

BTW, I have a pair of 7B SST2's and will be using the CS 15.  The only way I would tax the 15 would be to run the 7's at full power (1800 W into 4 ohms) which would blow the windows out of my house and send me packing to the ear, nose and throat specialist!

Regards,


Billhttp://www.toruspower.com/shopping/shopdisplayproducts.asp?id=2&cat=Torus+Power+Isolation+Units+%96+120V+Series

get the 20 amp dyna, its only a couple hundred more. Maybe less now

That is not accurate, werd.  The price difference between the RM/CS 15 and 20 is $1K.  Check it out:

http://www.toruspower.com/shopping/shopdisplayproducts.asp?id=2&cat=Torus+Power+Isolation+Units+%96+120V+Series

I just noticed that the price difference between the 10 and 15 is only $200.00 so James is right that the 15 is the best value right now.

Holy smokes thats changed quite a bit in price. Used to be only a couple hundred bucks diff. they have lowered the price of the 15 by  a few hundred.

[SF]

Hi Robb

I recently bought the CS15 to support my 14B and I am very happy with it. 95Dyna has a very good point that you only approach max draw at deafeningly high volume. Also, I think that if you plug into a regular 15A line, a bigger Torus cannot make a difference. I chose a CS15 for my 14B for these reasons. As James pointed out, both the 10A and 15A models well be sufficient. He also pointed out that the CS15 is very good value for the money. If you don't have a dedicated 20A line then I would recommend the CS15 to leave room for later upgrades.

Shafie

[vegasdave]

Hi Robb,

The Torus website advises that you deploy the unit that just exceeds the amp draw of your system (see link below).  As its name suggests the 4B SST2 has a maximum amp draw of around 4 amps.  Considering you will want to connect your pre and source componenets the RM/CS 5 will be very tight and the RM/CS 10 will do just fine perhaps with room to spare.  Don't be thrown off by the "hi end, mid-range" system analysis which to me is imprecise.  Use the advice to count amp draws then size accordingly.  Remember, the 4 amps on the 4B is at maximum power usage and the real world composite draw will be less.  If you want to spend more money go for the 15 but any sonic advantage may not be worth the extra expenditure.

http://www.toruspower.com/customer.htm

BTW, I have a pair of 7B SST2's and will be using the CS 15.  The only way I would tax the 15 would be to run the 7's at full power (1800 W into 4 ohms) which would blow the windows out of my house and send me packing to the ear, nose and throat specialist!

Regards,


Billhttp://www.toruspower.com/shopping/shopdisplayproducts.asp?id=2&cat=Torus+Power+Isolation+Units+%96+120V+Series

get the 20 amp dyna, its only a couple hundred more. Maybe less now

That is not accurate, werd.  The price difference between the RM/CS 15 and 20 is $1K.  Check it out:

http://www.toruspower.com/shopping/shopdisplayproducts.asp?id=2&cat=Torus+Power+Isolation+Units+%96+120V+Series

I just noticed that the price difference between the 10 and 15 is only $200.00 so James is right that the 15 is the best value right now.

Only $200? You might as well go for the 15...

[vegasdave]

The only way I would tax the 15 would be to run the 7's at full power (1800 W into 4 ohms) which would blow the windows out of my house and send me packing to the ear, nose and throat specialist!

Regards,


Bill

What's wrong with that? 

[robb]

Thanks James and all the others for the advice.

I believe at this point in time the rm 10 will be sufficient for my purposes.  I just wanted to make sure it wouldn't compromise the dynamics and peak current draw of the amplifier.

Rob

[bmckenney]

Thanks James and all the others for the advice.

I believe at this point in time the rm 10 will be sufficient for my purposes.  I just wanted to make sure it wouldn't compromise the dynamics and peak current draw of the amplifier.

Rob

I'm trying out a 10 with a 150W times 2 integrated amp.  300W/120V is only 2.5 amps.  The 10 seems to be more than enough.

[srb]

I'm trying out a 10 with a 150W times 2 integrated amp.  300W/120V is only 2.5 amps.  The 10 seems to be more than enough.

In your case, I'm sure the CS10/RM10 is more than enough.  But remember when you are computing maximum power consumption for an amplifier, it's the input power conspumption, not the output power delivered.
 
Since amplifiers are not 100% efficient, a lot of power is lost as heat.  For example, the Bryston 4B SST2 when outputting 300W X 2 or 600W, uses 1200W of power to do so.
 
Your 150W X 2 integrated may consume up to 600W to do so, or up to 5 Amps. Efficiency, of course, varies depending on the amplifier design and class (Class D amplifiers are a lot more efficient), but most Class A/AB amplifiers will have efficiencies similar to the Bryston example.  Use the Maximum Power Consumption spec on the rear panel or from the manual.
 
As mentioned earlier, no one uses the full power output of their amplifier in a continuous fashion, but you do want to be able to accomodate the largest peaks and transients.
 
Steve

[James Tanner]

I'm trying out a 10 with a 150W times 2 integrated amp.  300W/120V is only 2.5 amps.  The 10 seems to be more than enough.

In your case, I'm sure the CS10/RM10 is more than enough.  But remember when you are computing maximum power consumption for an amplifier, it's the input power conspumption, not the output power delivered.
 
Since amplifiers are not 100% efficient, a lot of power is lost as heat.  For example, the Bryston 4B SST2 when outputting 300W X 2 or 600W, uses 1200W of power to do so.
 
Your 150W X 2 integrated may consume up to 600W to do so, or up to 5 Amps. Efficiency, of course, varies depending on the amplifier design and class (Class D amplifiers are a lot more efficient), but most Class A/AB amplifiers will have efficiencies similar to the Bryston example.  Use the Maximum Power Consumption spec on the rear panel or from the manual.
 
As mentioned earlier, no one uses the full power output of their amplifier in a continuous fashion, but you do want to be able to accomodate the largest peaks and transients.
 
Steve

Totally agree Steve and in my opinion given the great price on the new CS15 I would go for it.

james