28B SST

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PavelL

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28B SST
« Reply #20 on: 25 Apr 2006, 05:01 pm »
O.K. nicolasb, now please explain me, how a particular speaker's explosive impedance affects an amplifier performance. I'm not talking Bryston and B&W now. Please.

James Tanner

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28B SST
« Reply #21 on: 25 Apr 2006, 05:35 pm »
Also if you bi-wire a single amp it will prevent any non-linear impedance reaction on the woofer from getting to the mid/tweeter because of the low output impedance of the amplifier.

james

guest2521

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28B SST
« Reply #22 on: 25 Apr 2006, 08:14 pm »
Surely the tl effectively stiffens the bass unit and makes it more highly damped... which is why the mb2 bass sounds so controlled and precise comapred with the B&W 800 - the current is required exactly due to the stiffness as the load becomes more difficult...

I found the treble and mid benefitted most from triamping - prob due to lower  IM.

nicolasb

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28B SST
« Reply #23 on: 26 Apr 2006, 01:13 pm »
Quote from: PavelL
O.K. nicolasb, now please explain me, how a particular speaker's explosive impedance affects an amplifier performance. I'm not talking Bryston and B&W now. Please.

As I've no idea what you mean by "explosive impedance" I'm steering well clear of that one.   :sad:


Quote from: James Tanner
Also if you bi-wire a single amp it will prevent any emf from getting to the tweeter because of the low output impedance of the amplifier.

Er... what?  :scratch:  

If we assume that the impedance of the speaker cable and of any shunt used when not bi-wiring are both negligible compared to the impedance of the speaker then single-wiring and bi-wiring are absolutely identical. The only way bi-wiring can make any difference is if the shunt is incredibly poor quality or if the resistance of the speaker wire is too high - doubling up the wire halves the resistance of the cable.

PavelL

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28B SST
« Reply #24 on: 26 Apr 2006, 02:22 pm »

caleb

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Confused
« Reply #25 on: 2 May 2006, 03:14 am »
As I started this thread, I would like to make the following comments: -

1) Amazing how my really simple question can lead to all sorts of side issues.

2) The following comment from nicholaslb"Clearly, if you have money to burn, then bi-amping with 28B-SST amps will sound better than single-amping with 28B-SST but the difference (on B&W speakers) will be small. And, in the majority of cases, it's better to use a single large amp than two smaller ones. As James T says, you can sometimes get good results using a large amp for the bass drivers and a smaller one for the treble and mid, but that's not something I'd advise you to mess with unless you really know what you're doing!"

If you read my initial thread - then this is just what I was asking.

I am going from B&W 802 to B&W800D and I wanted to get some extra power to drive these difficult speakers - THAT'S ALL ! !

BTW James - as soon as the 28B SST are released - I would appreciate a PM from you so I can arrange to get two.

Thanks

James Tanner

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28B SST
« Reply #26 on: 2 May 2006, 11:27 am »
Hi Caleb,

Hopefully the 28B will be available in about a month. The first production run is pre-sold though.

james

Sebastiaan de Vries

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28B SST
« Reply #27 on: 4 May 2006, 08:29 am »
Dear Caleb,

You gonna have a wonderfull system..! I don't know the 28BSST yet, but knowing the sound of the 7BSST and keeping in mind the 28BSST will be the flagship of Bryston it have to be great.. :D

About the above discussion. I can only conclude one thing. The ultimate dream gonna be. 4x 28BSST in a active biamp system :D

Best regards,
Bas

nicolasb

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28B SST
« Reply #28 on: 4 May 2006, 08:56 am »
Quote from: Sebastiaan de Vries
About the above discussion. I can only conclude one thing. The ultimate dream gonna be. 4x 28BSST in a active biamp system :D

Four? A mere four? You call that a dream system?

How about a 7.1 speaker surround system using B&W Nautilus speakers and twin passive subwoofers? That would require a total of thirty 28B-SST amps to power it. And a specially customised house with industrial-grade power distribution. :mrgreen:

Sebastiaan de Vries

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28B SST
« Reply #29 on: 4 May 2006, 09:16 am »
Quote from: nicolasb
Quote from: Sebastiaan de Vries
About the above discussion. I can only conclude one thing. The ultimate dream gonna be. 4x 28BSST in a active biamp system :D

Four? A mere four? You call that a dream system?

How about a 7.1 speaker surround system using B&W Nautilus speakers and twin passive subwoofers? That would require a total of thirty 28B-SST amps to power it. And a specially customised house with industrial-grade power distribution. :mrgreen:


Dear Nicolasb,

Hahahah ok you got me there!! :D I'm insane enough for that. only money is the limiting factor :D

@ James. Can you give me any info about the Idle power consumption of one single 28BSST?. If four 28SST's consume 2Kwatt of continu power al together it gonna be a problem. I'm affraid then I simply can not pay my energie bills anymore :D... :D

Best regards,
Bas

PavelL

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28B SST
« Reply #30 on: 4 May 2006, 09:36 am »
Quote from: James Tanner
much more to do with marketing than scienc ...

What I find in my setups is that whatever lower powered amp I am using on the speaker I move to the tweeter and use an amplifier of twice that power on the woofer. (important point - amplifiers must have the same GAIN). I find for instance that the new 2B SST on the tweeter and the 3B SST on the woofer in a 2-way passive bi-amp situation sounds great.



Conclusions that some of the forum members come to simply defy logic. IMHO. The facts of B&W life are that woofers need power - tweeters do not. So 4 28B SSTs to drive a pair of 800Ds is NONSENSE.

Sebastiaan de Vries

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28B SST
« Reply #31 on: 4 May 2006, 10:07 am »
Quote from: PavelL
Quote from: James Tanner
much more to do with marketing than scienc ...

What I find in my setups is that whatever lower powered amp I am using on the speaker I move to the tweeter and use an amplifier of twice that power on the woofer. (important point - amplifiers must have the same GAIN). I find for instance that the new 2B SST on the tweeter and the 3B SST on the woofer in a 2-way passive bi-amp situation sounds great.



Conclusions that some of the forum members come to simply defy logic.  ...


Dear PavelL,

In term of power in watts it is noncense I'm agree. But what if (despite the numbers in watt) the 28BSST just have the best mid-highs from al the Bryston amps? Then you also want that on the mid-highs. And it is also nice to have the same amp with the same sonic character on the low's mid and highs.

It also suprise me why people are al so focussed on the numbers in watt. I'm not excited about the 28BSST because of it's enormous power. I'm excited because I expected it to be a non compromise flagship of Bryston with the best sound they can build today.

Best regards,
Bas

Sebastiaan de Vries

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28B SST
« Reply #32 on: 4 May 2006, 10:19 am »
Dear,

I want to follow up with saying that bi-amping with N800D's would be insane and might be a waste of money. I talk about "active" bi-amping. I heard my B&W Matrix-800 active bi-amped and the fact you went active and remove the (dampingfactor reducing) passive filters in the woofer section you really open a new world in bass extension, impact natrualness and control. For an active setup you need two or more amps. And in that case I prefer the same amps for low and mid-high.


Best regards,
Bas

caleb

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28B SST launch
« Reply #33 on: 27 May 2006, 08:33 am »
Hello James.

Has the launch gone smoothly?

When do you expect to get these to the "rest of the world"?

caleb

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Re: 28B SST launch
« Reply #34 on: 31 May 2006, 03:10 pm »
Quote from: caleb
Hello James.

Has the launch gone smoothly?

When do you expect to get these to the "rest of the world"?



Any comments James??

James Tanner

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« Reply #35 on: 4 Jun 2006, 02:07 pm »
Hi Guys,

Sorry I am late getting back to you - was in CUBA for 10 days at my son's wedding.

The 28B's were in my home on a pair of MB2's- I have to say I like them.
Loaned them to a friend of mine will I was away - has Maggie MG20's- and he will not give them back.

We are building 40 units of which 32 are presold.

james

Dokter_doug

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28B SST
« Reply #36 on: 4 Jun 2006, 07:44 pm »
Quote from: James Tanner


We are building 40 units of which 32 are presold.

james


For what price?

Doug

jethro

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28B SST
« Reply #37 on: 4 Jun 2006, 08:41 pm »
Quote from: James Tanner
Hi Guys,

Sorry I am late getting back to you - was in CUBA for 10 days at my son's wedding.

james


Hi James:

I figured you must have been on vacation. Congratulations on your son's wedding.

caleb

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Two for Me??
« Reply #38 on: 8 Jun 2006, 03:02 pm »
Quote from: James Tanner
Hi Guys,

Sorry I am late getting back to you - was in CUBA for 10 days at my son's wedding.

The 28B's were in my home on a pair of MB2's- I have to say I like them.
Loaned them to a friend of mine will I was away - has Maggie MG20's- and he will not give them back.

We are building 40 units of which 32 are presold.

james


Thanks James - congratulations - you must be very proud after your son's wedding.

What price can I get two of these 28s for?

As long as you can give me 240 volts, I would fly to Canada to pick them up.

James Tanner

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28B SST
« Reply #39 on: 12 Jun 2006, 04:09 pm »
Hi Caleb,

We do not sell direct so you would have to speak with one of our dealers about purchasing the 28B

james