Friday, April 4, 2014

April meeting place and time set

Ok, the next meeting will be on Saturday, April 19th, 2014 from 2pm-5pm

The meeting will be at LVAC member Tony's place. If you recall, we had our fourth meeting there back in November of 2013. Since then, there have been newer members that have not heard Tony's
exceptional high end 2-channel system! Hence the reason for doing at his place again.

Refer to the following link to check out Tony's system: http://lasvegasaudioclub.blogspot.com/2013/11/our-fourth-meeting.html 

Both analog and digital recordings will be played, evaluated, and enjoyed. Pizza and drinks will be served to satiate the appetite.

So, you don't wanna miss this!

For details, feel free to email us @ dave_a_2005@hotmail.com or motorcitydeadman@gmail.com

Accuphase A-70 amplifier

Exciting news coming from the headquarters of Accuphase Laboratory, Inc. in Yokohama, Japan! They are pleased to announce the new release of the incredible Class A A-70 amplifier (which replaces the A-65.) One of the higher-ups @ Accuphase was so kind to send us an exclusive pdf file on the A-70. Needless to say, that on paper, this looks to be Accuphase's best stereo amplifier to date! And a strong contender for the world's best!

For your copy of the pdf file, email us at: dave_a_2005@hotmail.com or motorcitydeadman@gmail.com

Edit: There is also a different standard pdf file now on the Accuphase website!

 http://www.accuphase.com/pdf/a-70_e.pdf

The A-70 will launch in the middle of this month in Japan. Other territories soon to follow.


For your convenience, here is the written part of the pdf without photos:

A-70 is a succession model of A-65 and the flag ship
class-A stereo power amplifier of Accuphase.
We already developed the flag ship class-A monophonic
power amplifier A-200 as 40 years anniversary model.
Technologies of A-200 were diverted to A-70.
In short, A-70 is stereo version of A-200.

The size of A-70 is as same as the former model A-65.
However A-70 is 1.3kg heavier than A-65 as chassis
structure is reinforced.

A-70 has digital power meters and 32-point LED bar
graph indications.
Digital power meter shows true output power without any
effect of speaker impedance.

2 pairs per channel of large speaker terminals are
equipped.
They are useful for bi-wired connection with loud
speakers.

Strong power supply by large Troidal transformer with
aluminum heat-radiation fins and 2 pieces of 82,000μF
capacitor are installed.

The chassis structure of A-70 was reinforced by 20mm x
15mm aluminum square bar on the front and back.
The continuous average output power is 60W into 8 ohm
load.

However A-70 has bigger headroom for maximum output
power. It is 131W into 8 ohm and 547W into 1 ohm.
A-70 is the super high power amplifier.

A-70 has the lowest noise performance in the 41 years’
history of Accuphase stereo power amplifier.
Our first stereo power amplifier P-300 launched in 1973
has 40μV of noise voltage.
41 years later, A-70 achieves 13μV at last.
This is the half of the former model A-65.

The output noise is reduced by some technologies.
Optimizing gain allocation of 2 amplifier blocks
constructed with instrumentation amplifier.
Enhancing gain of balanced input amplifier block from 4
times to 12.6 times.
Output noise voltage is ideally decreased to 33%.

The output noise is also reduced by the discrete
configuration amplifier which IC is not installed on signal
path.

A-70 has the highest Damping-Factor specification in the
41 years’ history of Accuphase stereo power amplifier.
DF of P-300 in 1973 was 60.

After 41 years, A-70 achieves 800 of DF.
This is 2 times higher than the former model A-65.
This is guaranteed specification. In actuality A-70 has
1,000 of DF.

*Damping-Factor, DF:
A index of speaker driving ability. Higher Damping-Factor
amplifier has higher speaker driving ability.
DF = 8 ohm / Output-impedance

The Output impedance is decreased by 10 parallel pushpull
output stage arrangement of MOS-FET.
Remote-sensing is the technique to lower output
impedance of amplifier by the negative feedback with
signal sensing from close up the speaker terminals.
Balanced Remote-sensing is the technique to make
impedance even lower by GND sensing and the negative
feedback of GND level with adding the signal sensing.
Not only Damping-factor is improved but also Total
Harmonic Distortion and Intermodulation Distortion get
better by Balanced Remote-sensing.

Mechanical relay is the most common for speaker
protection. It does not have good reliability and so lower
contact resistance either.

A-70 employed MOS-FET switch instead of mechanical
relay for speaker protection.
Damping-Factor, reliability and sound quality are
improved thanks to MOS-FET switch.

Some other very low impedance/resistance components
which are chosen for A-70 are large speaker terminal,
rectangular wire coil and so on.
Making signal path thick and short attains having low
impedance.

Monday, March 24, 2014

Our Eighth Meeting

Ok, fellow audiophiles in the Las Vegas area and everywhere really (this is the world wide web after all,) the first audio club ever in Sin City, has now completed its eighth meeting!

We had our eighth meeting 1 Saturday ago, (which was 3-22-14)

This time new LVAC member Steve hosted the affair, with his superb 2 channel system that is breathtaking in every way.

As usual, we had a great time listening to a variety of tunes (CD and LP) on Steve's system. We could have listened for hours as the sound was very relaxed and fluid. Great pizza and drinks were served. And once again, it was good times!

Right now, we have over 10 members, and we're looking for a few more good audiophiles in the Vegas area and beyond.

Again, meetings will be once a month. Usually the 3rd or 4th weekend.

So, don't be shy, we'd love to have you for the next meeting, and as of now it's still FREE to join!

Any questions? email us at: dave_a_2005@hotmail.com or motorcitydeadman@gmail.com

Photos of the system are below. Photos were taken by club member Steve.

Here is the system rundown:

Vacuum State Electronics Level 7 modified Sony 5400 SACD player

Rega P25 turntable with Benz Micro cartridge

custom monoblock passive preamps from Promitheus Audio

the latest version of the Herron monoblock power amps

PS Audio Powerplant AC regenerator

LessLoss cables all around (except for Shunyata Aries for the phono preamp) and various tweaker footers and platforms under the gear (including Polycrystal equipment rack and speaker stands), and a bunch of Argent room lenses.

Steve says: "And my one-of-a-kind custom-made speakers. I can only say they were designed by my Maryland friend Murray Zeligman who designs speakers for various Scandinavian speaker driver makers, and who designed the speaker I had before this, the Nova Rendition, which retailed for $20K 15 years ago. I asked him to make the speaker he'd make for himself if cost was no object."

Photos:






Thursday, March 20, 2014

March meeting place and time set!

Ok, the next meeting will be on Saturday Mar. 22nd, 2014 from 2pm-5pm

The meeting will be at new LVAC member Steve's place. This is Steve's first time hosting as well.

Steve's system features tube equipment and some fascinating custom made speakers. The sound should be excellent. CDs and LPs will be played, evaluated, and enjoyed. Pizza and soft drinks will be served.

So, you don't wanna miss this!

For details, feel free to email us @ dave_a_2005@hotmail.com or motorcitydeadman@gmail.com

Saturday, March 15, 2014

Membership in the LVAC

We're currently looking for a few good audiophiles in the Las Vegas area. Whether you live in the area, or are just visiting, we implore you to join our club. It truly is a lot of fun, and is educational to boot. Membership is currently free. That's right, it's free to join at this time. There are no rankings at this time other than LVAC member Dave being the Founder and President. So, what are you waiting for, join the LVAC now!

Contact us at: dave_a_2005@hotmail.com or motorcitydeadman@gmail.com

Thanks for looking, and we would love to have any and all of you as new members!

Monday, March 3, 2014

Our Seventh Meeting

Ok, fellow audiophiles in the Las Vegas area and everywhere really (this is the world wide web after all,) the first audio club ever in Sin City, has now completed its seventh meeting!

We had our sixth meeting 2 Sundays ago, (which was 2-23-14)

This time LVAC member Barry hosted the affair, with his dynamite 2 channel system featuring high end JBL speakers!

As usual, we had a great time listening to a variety of tunes (CD and DVD) on Barry's system. We could have listened for quite a while as the system danced like a ballerina. But it could charge like a rhino when asked to do so. And of course, good food and drink were served. And once again, it was good times!

Right now we have 10 members, and we're looking for a few more good audiophiles in the Vegas area and beyond.

Again, meetings will be once a month.

So, don't be shy, we'd love to have you for the next meeting, and as of now it's still FREE to join!

Any questions? email us at: dave_a_2005@hotmail.com or motorcitydeadman@gmail.com

Photos of the system are below. Photos were taken by club member Barry.

Here is the system rundown:

  JBL 1400 Array loudspeakers w/2 1500 Array subwoofers

  Sony  TA-E1000ESD AV Pre Amp

  Two Tascam CD-500 1RU Compact Disc Players

  Panasonic BTD500 Blu-Ray Player

  Panasonic ZT60 65" Plasma TV

  Middle Atlantic UPS-2200R AVR for the Rack and TV

  Jensen DM2-2XX ISO-MAX transformer

  2 AE Techron (Crown Industrial) 7570 2KW Mono Block Power Supply/Amplifiers.

  Furman Sound ASD120 Power Sequencer

  Cables by Canare, the terminations are Neutrik. All the AC cords are Signal Safe low EMI by        Middle Atlantic

Some notes on the system by Barry:

  "The Sony is 22 years old but it has beaten every AAV Pre I have put it up against for sound quality so if one must have an AV Pre."

  "I got sick and tired of finicky CD players. These sound as good as anything I have owned and have every output imaginable including balanced. They are only 1U to boot."

  "The Blu-Ray player is Panasonic's Flagship player and sounds pretty darn good to boot plus I wanted one remote for video play."

  "The ZT60 is also Panasonic's Flagship plasma TV."

  "The UPS-2200R Is a server computer grade UPS-AVR. After a high voltage power line fault at my home destroyed two Crown amps, two JBL 2426 1" compression drivers, two JBL 2123 10" midrange drivers, and the control panel in my air compressor I decided that I was going to take some precautions against idle hopes of that never happens again."

   "The Jensen Transformers serve two purposes, first they allow me to drive the amps in true differential drive or balanced from an unbalanced source like the consumer grade AV-Pre and keep the noise floor at an absolute minimum, as you heard with your ear to the horn. Second, the amps being industrial power supplies are DC coupled and have bandwidth to 100 KHz, yup DC to light."

  "The amps, the 7560-7570 chassis has been used by Crown a couple of times for audio such as the Crown MA600, and the Crown Delta Omega which buy the way powered  Pink Floyd's  The Wall Concert Tour, and by AE Techron for things like MRI machines, shaker tables, high frequency electroplating, relay testing, I mean you name it, I saw a demonstration where they ran a skill saw with one and I used one on our fuel injector tester to drive a set of Ferrari DI nozzles that require up to 90 Volts to open under several thousand pounds of fuel pressure, our testers drivers would not open them at all."

  "The Furman sequencer is a six circuit 120 amp sequencer. I ran a 40 Amp 240 Volt dedicated run for the stereo that the Furman connects to. This allows the wife and kids to access any part of the system with only the push of the AV Pre power button, and, if I fell the need, I can turn it off and take the key leaving the system totally inaccessible."
Photos:



Wednesday, February 12, 2014

February meeting place and time set!

Ok, the next meeting will be on Saturday Feb. 22nd, 2014 from 2pm-5pm

The meeting will be at LVAC member Barry's place. This is Barry's first time hosting.

Barry's system features JBL Synthesis Array loudspeakers and subwoofers. The sound should be very, very good indeed. Digital recordings only this time around will be played, evaluated, and enjoyed. Refreshments will be provided once again.

So, you don't wanna miss this!

For details, feel free to email us @ dave_a_2005@hotmail.com or motorcitydeadman@gmail.com

Links: http://www.jblsynthesis.com/Products/Details/94

http://www.jblsynthesis.com/Products/Details/95