bp 17cubed.

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redbook

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bp 17cubed.
« on: 31 Jan 2018, 08:27 pm »
 James  why  was a phase reverse switch left out of the design...thanks... REDBOOK. :thumb: :scratch:

James Tanner

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Re: bp 17cubed.
« Reply #1 on: 31 Jan 2018, 09:10 pm »
Hi

Its really not something that makes a lot of sense these days with multi-miked recordings because any one signal chain could be in or out of absolute phase.

So you get the horns in absolute phase but the drums are out.  Its a 50/50.

james
« Last Edit: 1 Feb 2018, 10:52 am by James Tanner »

Elizabeth

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Re: bp 17cubed.
« Reply #2 on: 31 Jan 2018, 10:26 pm »
I find the phase reversal switch on my BP-26 very useful at times.
Sometimes the vocals are a little less difficult to understand when I check by flipping the switch.
With my Maggies, I notice phase normal the image is slightly in between and front of the speakers. With phase reversed the image is larger and behind the speakers.
(I have my Maggies turned in a lot)

redbook

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Re: bp 17cubed.
« Reply #3 on: 1 Feb 2018, 12:54 am »
Hi

Its really not something that makes a lot of sense these days with multi-miked recordings because any one signal chain could be in or out of absolute phase.

So you get the horns in absolute pause but the drums are out.  Its a 50/50.

james
...thanks James  I guess it's not worth the trouble in most situations... :thumb:

James Tanner

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Re: bp 17cubed.
« Reply #4 on: 2 Feb 2018, 03:54 pm »
Hi Folks,

French review on the BP17 preamp and 4B Cubed combo.

http://www.bryston.com/PDF/reviews/2018_02_02_Review_French_Bryston.pdf

Tympani

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Re: bp 17cubed.
« Reply #5 on: 2 Feb 2018, 10:41 pm »
Hi

Its really not something that makes a lot of sense these days with multi-miked recordings because any one signal chain could be in or out of absolute phase.

So you get the horns in absolute phase but the drums are out.  Its a 50/50.

james

The beauty of recorded music is that, unlike with food, you're not limited to fare just made "these days" :wink:
(Just some friendly ribbing, James) :nono:

Even if you believe that current multi-mike recordings don't reveal the benefits of correct polarity (and I don't), 95% of my music collection is stuff either recorded a rather long time ago, or if produced recently, recorded with attention to phase coherency. Absolute polarity switching for me is a crucial feature to have, somewhere in the equipment chain. The preamp makes the most sense from a practical standpoint, especially if you have analog sources. In a purely digital system, I think it's best accomplished in the DAC. Like Elizabeth, I listen to Maggie's, where the effects are likely more noticeable. But many "box" speakers, including Bryston's offerings, are touted to be phase coherent, and should easily show the salutary effects of correct absolute polarity.

REDBOOK, trust your ears!

« Last Edit: 3 Feb 2018, 05:28 pm by Tympani »

gberger

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Re: bp 17cubed.
« Reply #6 on: 2 Mar 2018, 08:16 pm »
I need two outputs: One to the amplifier and one to the  Stax Lambda  electrostatic amplifier
I'm currently using a BP 6 C (two output connectors)

Can I use audio frequency Y splitters with the 17 cubed without degrading the sound?

Elizabeth

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Re: bp 17cubed.
« Reply #7 on: 3 Mar 2018, 12:47 am »
I need two outputs: One to the amplifier and one to the  Stax Lambda  electrostatic amplifier
I'm currently using a BP 6 C (two output connectors)

Looking at a BP-17cubed picture via Bryston website I see on the back FOUR sets out output .
Two pair RCA. (one RCA fixed level, other by volume, and two pair XLR.)
I think you are covered.

gberger

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Re: bp 17cubed.
« Reply #8 on: 3 Mar 2018, 01:19 am »
My trouble is with the fixed output - - zero amplification

gberger

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Re: bp 17cubed.
« Reply #9 on: 3 Mar 2018, 01:33 am »
Sorry, Elizabeth. I should have mentioned the BR6 is driving a 4Bsst2 into a pair if Thiel 2.7 speakers.  The amplifier for the Stax Lambda Pro headphones needs a decent input to drive the amplifier output to the electrostatics. Zero input doesn't work.

My beloved neighbors insist on "quiet" after9:00 pm, so I'm relegated to the Stax for the evening.

James Tanner

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Re: bp 17cubed.
« Reply #10 on: 3 Mar 2018, 11:18 am »
Hi Folks,

The 2 sets of outputs (RCA and BAL) on the BP-17 Cubed can have the one set fixed or both sets variable.

james

gberger

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Re: bp 17cubed.
« Reply #11 on: 8 Mar 2018, 04:04 pm »
James,
How do I change the fixed RCA output to a variable one?   I need both RCA outputs to be variable: one to an amplifier, and one to a Star Headphone amplifier.

TIA   George

James Tanner

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Re: bp 17cubed.
« Reply #12 on: 8 Mar 2018, 04:19 pm »
James,
How do I change the fixed RCA output to a variable one?   I need both RCA outputs to be variable: one to an amplifier, and one to a Star Headphone amplifier.

TIA   George

i believe the factory setting is variable on both but I will check

james

James Tanner

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Re: bp 17cubed.
« Reply #13 on: 10 Mar 2018, 08:42 am »
James,
How do I change the fixed RCA output to a variable one?   I need both RCA outputs to be variable: one to an amplifier, and one to a Star Headphone amplifier.

TIA   George


Hi George, From engineering.

Hi James,

Only one pair of XLR outputs is configurable as either LINE or PREAMP out.

The SE (RCA) outputs are not configurable.

Perhaps a "Y: connector could be used on the RCA PRE-OUT for the customers purposes?

Thanks,
David

gberger

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Re: bp 17cubed.
« Reply #14 on: 11 Mar 2018, 02:28 am »
 David

I figured that might be the case, but thank you for checking.

George

James Tanner

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Re: bp 17cubed.
« Reply #15 on: 21 Mar 2018, 08:45 am »


Hi Folks,

Just got the copy of the review on the Bryston BP-17 Cubed preamplifier coming in June 2018 issue.

As the Brits would say "Its a corker"

james