Wednesday, September 13, 2017

Boulder 3010 Preamplifier inside

Kerr Acoustic True Ribbon Tweeter

We feel that ribbon tweeters are an area often shrouded by misconception. While the term ‘ribbon’ is used to cover a broad range of tweeter technologies, a ‘True Ribbon’ tweeter is one in which the whole diaphragm itself acts as the conductor. This means there is absolutely zero excess (non-conducting) mass, and that the diaphragm can be immensely thin and light.

The aluminium ribbon diaphragms used in our K300 monitor are just 15 microns thick, and have a total moving mass of 0.027g.

For context, air-motion-transformer tweeters typically have a moving mass of 0.17g, and conventional dome tweeters around 0.5g. From this, you can gather that our ribbons are approximately eighteen times lighter than most domes!

The result? Flawless reproduction of high-frequency content, and unmatched transient response. The speed, extension, and non-fatiguing detail that our tweeters provide is quite remarkable, and make it very hard to switch back to conventional tweeter designs.

We use True Ribbons throughout our range of products.

Sunday, September 10, 2017

Kerr Acoustic K100

Our main reference monitor is a large format three-way design, featuring a twelve-inch Radial™ driver partnered with a three-inch dome and True Ribbon tweeter.

Offering a full, uncompromised frequency response from 16Hz to 45kHz, the K100 is a true reference loudspeaker, designed to set the new standard in professional monitoring and critical listening.

Whether you require a truly compromise-free accurate monitoring solution in your mix/mastering studio, or the ultimate reproduction of finite detail in your personal system, the K100 guarantees a truly vivid and engaging sonic performance.


LF Driver 12” High-Performance unit with Radial™ intercooler technology
MF Driver 3” Low-distortion dome with 8 kg magnet assembly
HF Driver 3” True Ribbon tweeter with 0.36g diaphragm mass
Response 16Hz – 45kHz
Sensitivity 92dB (2.83V/1m)
Impedance 4 Ohms (nominal)
Crossover 370Hz | 3.6kHz - 2nd order (12dB/ Octave)
Dimensions H:1268 | W:348 | D:550 mm
Construction 24mm Baltic Birch plywood transmission-line
Weight 78 kg

Recommended Amplifier Power 150 - 800 Watts

Kerr Acoustic K300

Our primary stand-mount loudspeaker is a two-way design, featuring a 6.5” wood-fibre cone and True Ribbon tweeter.

Designed to be the last near-field monitor you will ever need, the K300 is equally at home in domestic environments as it is in the studio. The K300 pushes the boundaries of what is sonically achievable from a stand-mount design, delivering a performance that is anything but compact.

Featuring the Kerr Acoustic transmission line, the K300 produces a stunningly accurate frequency response from 33Hz – 45kHz, which remains linear and uncoloured at all playback levels.


LF Driver 6.5” Wood-fibre cone with low-loss linear suspension system
HF Driver 3” True Ribbon tweeter with 0.27g diaphragm mass
Response 33Hz – 45kHz
Sensitivity 89dB (2.83V/1m)
Impedence 4 Ohms (nominal)
Crossover 1.95kHz - 2nd order (12dB/ Octave)
Dimensions H:420 | W:195 | D:395 mm
Construction 18 / 24mm Baltic Birch plywood transmission-line
Weight 12 kg

Recommended Amplifier Power 10 – 200 Watts

Analog Domain Argus

Thursday, September 7, 2017

LM Audio 845IA Premium

Product Features:

LM-845 Premium Integrated Amplifier is combined with two units. One is the amplifier unit and the other is Outputs unit. In the amplifier unit the main amplifier and power supply parts are included while in the outputs unit output transformer and speaker outputs parts are included. Amplifier unit and outputs unit are connected with two separate well built connectors and cables for which you can put up and down or left and right.

Thirty watts per channel, Single Ended design, Pure Class A Integrated Stereo Amplifier with 845 output power tubes.

All tube Integrated with 12AX7 input tubes, 310A signal amplification stage, 300B driver tubes and 845 output tubes.

Well selected and matched tubes. Tubes we chose are Shuguang 12AX7, Line Magnetic 310A, Shuguang 300B and Shuguang 845. No matter it is the Pre-stage or power stage of tubes we select and choose the best matching ones to use on the same unit of amplifier to get the best sound quality out of it.

Three pairs of Line inputs, One pair of Balance Input and One Pre-In are located on the back panel of the amplifier unit. Left and Right inputs take a way of balance design. All are separately arranged to lower the cross-talk between Left and Right.

Different from other inputs Pre-In offers you a possibility to connect to some other Preamplifier so that you can the LM-845 Premium as a power amplifier.

Speaker terminals for 4, 8, 16 ohm speakers are located on the back panel of the Outputs unit. Same as inputs speaker outputs are arranged in a way of balance and separate design too.

Two user bias controls for 300B and 845 have been used for bias adjustment and two meters has been added to the front plate to allow you to monitor bias with ease.

One Power Meter with two pointers is located in the middle of front plate to allow you to monitor the power output of each channel.

Negative Feedback switch is on the front plate that you can choose between two levels of NFB to enjoy the different sound outputs of the LM-845IA Premium tube amplifier. Under the state of MAX it has a better dynamic while as for MIN the sound output has a more density.

On the rear panel of the Transformer Unit there is a Phase Switch you can choose between Phase In and Out.

In LM-845 Premium it includes eight transformers. Two pieces of power transformers, two output transformers, two coupling driver transformers, two chokes. In order to have a stable and better power supply we have designed two pieces of specially designed Toroid power transformers in Balance. EI type of output transformers are installed in the outputs unit separately to lower interfere from the external radio frequency.

Japanese Audio grade ALPS volume potentiometer has been applied. RCA terminals are specially designed by Line Magnetic for the amplifier. It can reduce the signal loss during transition and guarantee the sound quality.

Standard with remote volume control.

Hand made construction with the finest point-to-point wiring.

SoftStart and time-delay circuit. (30 seconds).

Solid Aluminum design of the front with Piano lacquer painting of chassis. An elegant combination of black. Nice looking amplifier you do not want to miss.


Power output: 30W Class A Single Ended

Frequency response: 15Hz~35kHz (-1.5dB)

THD: 1% (1kHz)

S/N Ratio: 80dB

Input Sensitivity: 250mV 1000mV (Pre-IN)

Input Impedance: 100kΩ

Output Impedance: 4Ω,8Ω, 16Ω

Dimension (W×D×H):  (430 x 456 x 460) mm

Tube Complement: 12AX7×2、310A×2、300B×2、845×2

Net Weight: 62kg

Power Consumption: 350W

Friday, September 1, 2017

Wizard Ultimate update

Posts and members visits at Ultimate:

September 1, 677 posts and 43500 hits.

There's always posted something special at Wizard Ultimate, the best ultra highend site on the internet.

The latest:

Zellaton Legacy setup
Zellaton at HK show
ANNA Lab GU-48 SET - one of the absolute best sounding in the world, with phenomenal bass too.
Tocaro 50e
NEM D-DAC 2 with Audio Alternative parallel R2R dac boards, the best dac in the world, beats easily all other serial R2R including MSB Select 2 and Aries Cerat Kassandra 2 LE.

All pics are in highres quality..... and now the security is the best with encrypted connection.

To be a member price is US $125, this includes a lifetime membership access to Ultimate and technical support - for example system matching and buy help.

For security login, you need to have a Gmail email account.

Contact me if you are interested to join - link at left on this page.

Technics SP-10R

SP-10R use a new coreless direct-drive motor with a two-sided rotor drive system and stator coils on both sides of the rotor. The platter, like that of the SL-1200G, is a sandwich of brass, die-cast aluminium and rubber.

The platter weight is 7,85kg and the inertial mass is 970kg-cm2.

The SP-10R also features a new ultra-low-noise switching power supply in a discrete unit, separate from the turntable, to prevent cartridge hum.

As with the original ’70s SP-10 models, the core SP-10R doesn’t come with a plinth or tonearm, although Technics will also be selling a complete package that includes those items.

The Technics SP-10R will be available from early summer 2018.

Wednesday, August 16, 2017

Studio Electric FSX

The top of the FS series. Available in custom finishes, including White, Piano Black, Figured Maple (shown) or Makassar Ebony.

FSX systems receive individually graded and tightly matched drivers to insure unsurpassed performance.

Extensive listening tests and burn-in at our shop, insure a speaker that will sound great right out of the crate!

Based on our highly regarded FS1 but with a few special touches!

FSX is a "3-driver + passive radiator" design. Mid-High components live in a seperate sealed enclousre from the low frequency sections. This robust speaker features a 1.5" baffle board and extensive internal bracing.

LF: SE HighXt™6.5" / 170mm /copolymer + 8" passive radiator
MF: SE HighXs™6.5" / 170mm /copolymer
HF: 1" / 25mm soft dome  
Frequency Response: 34Hz-22kHz
Sensitivity: 91dB @ 1W / 1 meter  
Recommended Amplifier Power: 75 to 450 Watts  
Impedance: 4 Ohms  
Crossover Frequencies: 80Hz / 3kHz
Construction: HDF and MDF with harwood veneers.
Cabinet Dimensions: (HxWxD): 45.5”x8.625"x22.125" (sans grill)  
Weight: 94 lbs. / 42.6kg (shipping weight: 104 lbs. / 47.2kg)

MSRP: $10,5000 -$11,500

Friday, August 11, 2017

Burmester - 40 years of nothing but the best

The new 159 Mono Blocks are Burmester’s most powerful amplifier ever built. The original concept, first shown at the Munich High-End show in 2016, was much more similar to the 909s in design. Like all Burmester products, they go through a concept phase then eventually over years of hard work come to the open market and into the hands of Burmester’s loyal customers and those looking for the best. We expect these new amplifiers to ship in 2018.

The 159’s are not as tall as the 909 but are much more substantial in stature being much deeper and very much heavier, estimated at 300+ lbs.

A fascinating design element is a sliding top on the 159’s. In order to power on the unit, you slide the massively heavy top towards the back, exposing the power lever and all the multiple damping factor settings of this world first design. Grab a hold of the power handle, something you would expect to see on a space ship, and you pull the lever forward to turn on the power that is the Burmester 159.

These Mono-blocks were design of Dieters that he had been working on for years, I recall getting a phone call from Dieter back in the winter of 2011 while I was enjoying the snow in Whistler, he was so excited to tell me about the epiphany he had and how amazing this great new design was going to be. The amazing team of engineers at Burmester were able to complete on this project.

Read more here

Monday, July 31, 2017

Conrad-Johnson ET7 line-stage preamplifier

Announcing the new ET7 line-stage preamplifier, replacing the ET5 in our product line. The ET7 incorporates the power supply advances from the GAT Series 2.

Jeff Rowland 535 Stereo Power Amplifier



MACHINED ALUMINUM CHASSIS - Precision-machined chassis milled from a solid block of aircraft grade 6061–T6 aluminum, provides exceptional thermal heat transfer/dissipation, RFI/EMI shielding, and resonance control.

CERAMIC INPUT CIRCUIT BOARD -Input circuitry, comprised of a precision instrumentation amplifier, is implemented on mil–spec, low dielectric constant, Rogers™ ultra-rigid ceramic circuit board substrate for extremely low energy retention and absorption.

BALANCED TOPOLOGY - Inherent cancellation effects of balance topology ensures greatly reduced distortion and noise under dynamic signal conditions.

HIGH-PRECISION SURFACE MOUNT COMPONENTS - Extensive use of Lead (pb)-free, low temperature coefficient, active and passive surface-mount components results and significantly smaller loop areas, reduced circuit capacitance and inductance and introduces less noise than conventional leaded components.

THIN FILM RESISTORS - All resistors are low noise, 0.1% thin–film type for extremely low thermal noise which complement the lownoise characteristics of the active circuitry.

TEFLON COATED WIRES - All signal carrying input and output wires are silver with teflon insulation for low dielectric energy storage, further ensuring that each audio note reproduced naturally decays into the deeper silence of the music.

TRANSFORMER-COUPLING AND ISOLATION - Custom designed Input Transformers, wound with Cardas “six nines” copper wire, provide universal component compatibility and virtually eliminate ground loop noise and RFI/EMI. Transformer coupling ensures identical amplifier overall gain when using unbalanced input adapters.

ACTIVE POWER FACTOR CORRECTION - Power Factor Correction (PFC) in the power supply reduces AC line harmonic noise pollution and increases AC line power utilization to 99%

HIGH EFFICIENCY SWITCH-MODE POWER SUPPLY - Highly efficient, compact, light weight switch-mode power supply provides optimum voltage regulation for all circuits and operating conditions and allows for a quiet operation over a wide range of AC mains power sources. Power supply capacitance has been increased 100% to improve overall performance under demanding operating conditions.

OUTPUT BINDING POSTS - Three CE approved speaker output terminals require no tools for secure, low resistance connections.

FLEXIBLE 15 AMP AC POWER - 15 amp AC power inlet accepts of wide variety of after market high-performance power cables.

FRONT PANEL STANDBY SWITCH - Illuminated front panel push-button switches the amplifier into standby mode.

REAR PANEL REMOTE JACK - 12V 3.5 mm jack on rear panel permits amplifier power on/standby switching in remote and home theater applications.

BRIDGING CAPABILITY - Rear panel “bridging” switch for easy conversion to a mono bridge amplifier. Separate mono input and output connectors allow for an easy and “fool proof” mono bridging configuration. Bridged amplifier gain is automatically maintained at the same level as stereo amplifier gain for easy implementation into multiamplifier systems.


Maximum Output Power: 250 watts @ 8 ohms / 500 watts @ 4 ohms 900 watts @ 8 ohms BTL (bridge-tied load)
Frequency Response: 5 Hz – 70 kHz, -3 dB
Output Noise: 40 Microvolts A weighted
Input Impedance: 40k ohms
THD + Noise: < 0.05%, 20 Hz -20 kHz
Damping Factor: > 1000 @ 1 kHz
Overall Gain / Bal. or Unbal.: 26 dB Stereo/Bridged
Peak Output Current: 30 Amps
Dynamic Range: 120 dB (A) /124 dB (A) Bridged
Inputs: 1 pair Balanced Stereo/ 1 input Balanced Mono
Outputs: 1 pair binding posts Stereo/ 1 output Mono
Mains Input Voltage: 85-265 VAC
Amplifier Weight: 22 lbs/ 9.79 kgs
Amplifier Dimensions: (h/w/d) 3.4” X 15.5” X 11.0” / 86 X 394 X 279 (H x W x D)
Intermodulation Distortion: (CCIF) 0.0015%
Intermodulation Distortion: (TIM) 0.0035%

Thursday, July 20, 2017

Analog Domain Argus

Price around €30,000

Sensitivity - 90 dB
Size - W x H x D - 46 x 120 x 46 cm

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