#301
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Hi James,
NEW REVIEW on BP-17 and 4B Cubed ! “One of the actually best amplifiers on the market” On German Online Magazine Fairaufio.de: https://www.fairaudio.de/test/brysto...r-kombination/ Best regards Edvard Potisk AViTech, Dkfm. Email: edvard.potisk@avitech.at Web: www.avitech.at |
#302
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#303
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Hi Folks,
I have a PDF of a very, very, very in depth review of the Bryston BP17 Cubed Preamplifier and 4B Cubed Power Amplifier combo from FAIRAUDIO Magazine in Germany. Some great pics as well! My sincere thanks to Peter Ullman a dedicated audiophile and true gentleman for his translation of the German to English. Please email me if you want a copy - it's 11 pages and 1M - jamestanner@bryston.com james |
#304
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__________________
Ivan FLORIDA MX136, MC1.2KW(10) MC2KW(2), MCD1100, MS750(2) MVP881, C1000C/P/T, MPC1500, HT-2 SUBS(2) HT3F(2) WS350(2) XRT2K, XCS2K, XR27(2) XCS350(2) JL GOTHAM v2 SUBS(2) SILENZIO MUSIC SERVER, LUMAGEN RADIANCE SCALER, SONY VPH-G90U 4K PROJECTOR, STEWART 120" MOTORIZED SCREEN, CINEMA-TECH SEATING, WW PLATINUM CABLES Reference System: ACCUPHASE A300 AMPS, C3900 PRE-AMP, DP1000 CD/SACD TRANSPORT, DC1000 DIGITAL PROCESSOR, DG-68 DIGITAL EQUALIZER, T1200 FM STEREO TUNER, PS1230 POWER SUPPLY, HRS-SXR CUSTOM RACK w/ M3X SHELVES, TAD REFERENCE ONE MK2 LOUDSPEAKERS, WW PLATINUM CABLES CAPE COD MX150, MC501(2) MC1.2KW(10) MC2301(2) MR88, MVP881, MCD1100, MDA1000, C1000C/P/T, MPC1500, ESOTERIC K-01X 30th ANNIVERSARY (BLACK) SACD/CD PLAYER, G02-X CLOCK, HT3F(2) XRT2K, XCS2K, XR27(2) JL GOTHAM v2 SUBS(2) JL FATHOM F113v2 SUBS(4) SOUND ANCHOR STANDS(2) KALEIDESCAPE STRATO & TERRA SERVERS 80-TB, LUMAGEN RADIANCE SCALER, SONY VPH-G90U 4K PROJECTOR, STEWART 120" SCREEN, SONUS FABER STRADIVARI, SILENZIO MUSIC SERVER, FORTRESS SEATING, WW PLATINUM CABLES Analog Rig: CLEARAUDIO INNOVATION WOOD, UNIVERSAL ARM w/ Da VINCI' CART, 2nd UNIVERSAL ARM w/ GOLDFINGER STATEMENT CART, HRS-MXR REFERENCE RACK-GLOSS BLACK w/ M3X SHELVES, AESTHETIX RHEA SIG PHONO-PRE, BRYSTON BHA-1 HEADPHONE AMP, WW PLATINUM CABLES Reference System: BURMESTER 911MK3 AMP(3), 088 PRE-AMP, 089 CD PLAYER, 100 PHONO PRE-AMP, 948 POWER CONDITIONER, ACCUPHASE DG-68 VOICING EQUALIZER, AVID ACUTUS REFERENCE SP TT, GRAHAM PHANTOM II SUPREME ARM, BENZ MICRO LP-S CART, GRANDIOSO P1X/D1X STACK, G1X RUBIDIUM MASTER CLOCK, N05 NETWORK PLAYER, SILENZIO MUSIC SERVER, HRS-SXR CUSTOM RACK w/ M3X SHELVES, SONUS FABER AIDA SPEAKERS, JL FATHOM F113v2 SUBS(2) SOUND ANCHOR STANDS(2) WW PLATINUM CABLES Library System: GRANDIOSO M1 MONOBLOCK AMPS, C1 LINESTAGE PRE-AMP, K1X CD/SACD PLAYER, G1 MASTER RUBIDIUM CLOCK, E02 PHONO-PRE, SILENZIO MUSIC SERVER, AERIAL ACOUSTICS 20T V2, AERIAL SW12 SUBS(2), CANTON REF K1’s, VPI HRX TT w/ SDS POWER SUPPLY, ORTOFON CADENZA BLACK CART, KLAUDIO RCM, SHUNYATA DENALI 6000/S v2, SHUNYATA OMEGA QR’s, WW PLATINUM CABLES Esoteric/Bryston System: ESOTERIC C02-X PRE-AMP, P-02X TRANSPORT, D02-X DAC, G02-X CLOCK, BRYSTON 28B3 CUBED MONOBLOCK AMPS(4), BRYSTON BHA-1 HEADPHONE AMP, SHUNYATA DENALI 6000/S v2(2) EVEREST 8000 POWER CONDITIONER(2) ALTAIRA CG & SG HUBS, AMR-DP777-SE DAC, SILENZIO MUSIC SERVER, TAD REFERENCE ONE MK2 LOUDSPEAKERS, QUADRASPIRE RACK, WW PLATINUM CABLES Accuphase/Canton System: ACCUPHASE E800 INTEGRATED, DP570 CD/SACD PLAYER, T1200 FM STEREO TUNER, DG-68 VOICING EQUALIZER, PS530 POWER SUPPLY, CANTON REF K3’s, CANTON REF K5’s, SILENZIO MUSIC SERVER, HRS MXR REFERENCE MAHOGHANY RACK w/ M3X2 SHELVES, WW GOLD CABLES |
#305
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#306
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Are there any major differences in specs between a 14B3 and a pair of 7B3s? Transformers, etc?
Thanks!!
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_______ Dave |
#307
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Quote:
The 7B's have a few advantages. The power supply capacitance is double what it is in the 14B and the ability to place each amplifier close to the speaker and use very short speaker leads is always a good idea. james |
#308
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Thanks James--Probably wouldn't be swapping out my speaker cables. Is shorter better or just less expensive? (I paid quite a bit for some big fat Kimber cables).
What effect does greater capacitance have on the sound? I've always wondered. I'm looking to upgrade my front two channels from my SP3--(Then perhaps go from 5.1 to 7.1 with the left over channels). Thanks again.
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_______ Dave |
#309
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Quote:
The extra capacitance helps with low impedance loads and transient delivery. Here's a white paper I did on speaker cables: Loudspeaker Speaker Wiring The length and resistance of the loudspeaker cable in your audio/video system is very important. In fact, any speaker cable is a compromise and the shorter you make your speaker cable the more accurate the sonic result. Keeping speaker cables as short as possible is essential for maintaining good (damping) control over the loudspeaker drivers. Music is a dynamic 'transient' (stopping and starting) condition and the better the amplifier can control the motion of the drivers in your loudspeakers the better the performance. The normally extremely low output impedance of the power amplifier will be compromised by any addition of 'series resistance' associated with speaker cables. Therefore, no cables (as in powered speakers) are best followed by keeping the speaker cables as short as possible. Most loudspeakers have impedance curves which will vary all over the map with frequency but this does not mean that adding a small series resistance due to loudspeaker cable is unimportant. In fact, if you add some small resistance between the amplifier and the speaker, you will create an interesting result. The loudspeaker's frequency response will start to vary directly as its own impedance! The magnitude of this effect increases directly with the magnitude of the series resistance added. So what you can end up with is a frequency response from your speaker which is a direct mirror of the impedance curve of your loudspeaker. This undesirable effect can be minimised with short, low resistance cables and low output impedance amplifiers (no tubes please). The output impedance of any decent modern power amp will be practically zero ohms (Bryston amplifiers are typically .01 ohms). To optimise the damping factor (ratio of speaker impedance over amplifier output impedance plus speaker cable impedance), any resistance between the speaker and the amp is undesirable.If we had a perfect amp with an output impedance of zero ohms and a perfect speaker cable with a series resistance of zero ohms then the damping factor would be infinite. Note: In this case the damping factor would be infinite regardless of speaker impedance (something, even if it changes, divided by nothing is always infinity). At the other extreme, power loss in your speaker cable contributes to audible dynamic compression because: Cable Power loss = Current SQUARED X Resistance of speaker cables. On dynamic peaks, output current can be in the 'tens of amperes'. That squared, times what might seem an insignificant amount of cable resistance can cause significant power loss. This may explain to some degree why some people hear substantial quality increases in their systems when they bi-wire or tri-wire while others claim little or no improvement. In some cases the extra set of speaker wires would significantly reduce the resistance (and improve the damping factor) between the amplifier and the loudspeakers, especially in long runs. With the advent of multi-channel audio systems utilising rear/back channels usually positioned 20 to 30 or more feet away from the amplifiers this lack of control becomes a serious issue. The Bryston PowerPAC Series of amplifiers are an attempt to minimise this problem by allowing the amplifier to be placed adjacent to each loudspeaker or attached directly to it using long interconnects (preferably balanced). By the way, the reason that cable length is relatively unimportant for component (Preamp to Amp) interconnects is that the magnitude of signal current in the conductors of interconnect cables is so small the power loss is insignificant. You must always try to preserve the dynamic integrity of the recording so reducing the resistance of your loudspeaker cables is one giant step it the right direction! James |
#310
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Wow! Thank you, James. Very interesting!
__________________
_______ Dave |
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