Designer Derek Hughes
VOTU
Friday, March 31, 2017
Wednesday, March 29, 2017
Avid Sigsum integrated amplifier
With built-in phonostage and four line level inputs, Sigsum like Celsus uses the ALPS RK50 volume control
Avid Celsus Pre & Power amps
The Celsus pre-amplifier incorporates a phono amplifier within a fully balanced design and offers the same flexibility found in the company’s Reference Pre-Amplifier.
For example, there’s the ability to simultaneously connect two phono cartridges and an additional four line level inputs.
The ALPS RK50 volume control used in the Reference Pre-Amplifier is retained and a separate PSU is included.
The matching Celsus stereo power amplifier has a direct lineage to the Reference Stereo amplifier design.
Saturday, March 25, 2017
Plinus RA-300
POWER
310 watts RMS per channel into 8 Ohms
475 watts RMS per channel into 4 Ohms
MONO OUTPUT
1000 watts RMS into 8 Ohms
1800 watts RMS into 4 Ohms
FREQUENCY RESPONSE
20Hz to 20kHz ±0.2dB
0dB at 1Hz and -3dB at 70kHz
DISTORTION
< 0.03 % THD at rated power
CURRENT OUTPUT
100A short duration peak per channel
INPUT IMPEDANCE
47k ohms
GAIN
RCA Inputs: 32dB
Balanced Inputs: 38dB
POWER/CURRENT CONSUMPTION
1400W
4.8A (1100W) Class A Idle
0.8A (184W) Class AB Idle/Standby
DIMENSIONS
Height: 285mm
Width: 510mm
Depth: 525mm
Weight: 60kg
Plinius RM-10
RM-10 marks the flagship electronic designs and the highest level build quality of stereo preamplifier housed in a new aesthetic design.
The RM-10 will be closely followed by Class A Power Amplifiers RA-300 and RA-125.
Key features of the new RM-10 Stereo Preamplifier:
New Discrete Circuit Design using only discrete components for lowest possible noise and distortion figures.
Analogue Balance Control for accurate adjustment of the audio level.
High Performance HT Bypass eliminates additional balanced/single ended signal processing and passes the signal through the high quality line amplifier stage.
Adjustable Line Stage Gain allows the adjustment of either the standard 12dB gain or a lower noise 0dB gain setting.
Dual Mono Configuration ie. a dedicated transformer and power supply for each of the left and right channels allows complete isolation of the signals and importantly the ground reference paths.
Specifications:
Line Inputs: 3 x XLR/RCA selectable, 3 x dedicated RCA
HT Bypass: 1 x XLR/RCA selectable
Line Outputs: 2 x XLR/RCA
Connectivity: 1 x Trigger In, 2 x Trigger Out, 1 x RC5 In
Gain: High: 12dB (4x), Low: 0dB (1x)
Input Impedance: 10K Ohms
Height: 170mm (6-3/4”)
Width: 510mm (20”)
Depth: 520mm (20-1/2”)
Weight: 20kg (44lbs)
MSB Reference DAC
With the recent success of the Hybrid DAC technology debuted in the MSB Select DAC, we are proud to release a new DAC carrying much of the same technology. More updates will be released soon.
Base Configuration starting at $39,900.00:
4 Hybrid DAC modules
1x SPDIF input module included(4 input slots available)
Femto 140 clock
Digital Volume Control
Dual Supply Power Base
Silver and black stock finishes
Notable Features:
Compatible with Select input modules and standard femto 140, femto 77, and femto 33 clock modules
Analog preamp upgrade available for analog inputs, volume control, and additional analog outputs
2X Mono Power bases to replace dual supply
Custom finishes available with extra charge
Friday, March 24, 2017
Thursday, March 16, 2017
Linnenberg Allegro mono amps
€5000
ALLEGRO delivers the superiority and authority of a linear class AB amplifier - even in demanding applications. It features high current capability and operating speed not to be found in IC-amplifiers aka “gain-clone” or any class D design. Clever construction techniques enabled us to build an amplifier with high packing density, consequently making the signal and power paths extremely short. So, don’t be fooled by the tender look – it is part of the concept to get big sound. In fact, creating circuits with unrivalled speed and response time is amongst other things a matter of physical closeness of electronic parts. The higher the frequency, the more it is important to reduce every millimeter of board trace.
Lateral MOSFET output stage
The transistor originally developed by Hitachi in 1977 is probably the only semiconductor power device solely made for audio use. Famous for its tube like characteristic and perfect bias stability under any load conditions, the ALLEGRO uses just a single pair of tandem devices in the output stage in the so called “common source” arrangement.
Balanced signal path
Almost any LINNENBERG (past / future) product features true balanced circuits and connectivity. Historically, this may have a reason in our roots lying in professional audio. ALLEGRO is no exception: here, the circuit composes of a very low noise instrumentation amplifier such as used in high-precision measuring equipment. This approach ensures perfectly matched input conditions for the positive and negative signals and thereby allows the realization of high-performance balanced signal transmission.
Ultra wide band design
The high quiescent current design of all preamp and driver stages enables a core speed close to 1MHz, slowed down only by input and output filtering to match real word requirements. With filters in place, the small signal as well as full power bandwidth (!) measures an impressive 350 kHz. The lower frequency limit is around 0.3 Hz. No coupling capacitors are used throughout.
Inherently low noise
High resolution audio is intrinsically tied to low noise and distortion. System noise is the lower resolution limit of any analog systems, because it determines the smallest signal not masked by a noise floor. Hence, low noise levels are desirable. A-weighted output noise measures 25μV for the ALLEGRO giving a SNR of 120dB or an equivalent to 20 bit. 20 to 21 bits analog resolution is the realistic limit, restricted by the laws of physics (e.g., thermal white resistor noise).
Miscellaneous
The power supply consists of a 230VA toroidal mains transformer and a total of 60.000μF energy storage capacitors, enabling a stable output of 55W/90W at 8Ω/4Ω. Precision regulated supply voltages for preamp and driver stages. Microprocessor controlled – non intrusive protection circuits against over current, DC-offset or over temperature.
