Zaterdag 11 november 2006, bron: East West Audio

Ingezonden mededeling

East West Audio heeft deze maand weer diverse nieuwtjes:

Audio Chamber amplifiers

Specifications:
Dimensions:390mm*350mm*200mm
N. W:23kg g. W:28kg
Maximum output:2*40w (ultralinear)
Frequency responses:20hz - 30khz (2db)
Input sensitivity:500-650mv
T h d: Max 1% (440hz)
Output impedance:4,8ohms
Input impedance:50kohms
Tube: El34*4 ; 6sn7*4
Supply votage:110v/220v
Power consumption:200w
S/n ratio:88-92db

Hotline cables

Solaja Audio, SA-1 tube pre-amp

Solaja Audio stereo tube preamplifier SA-1 was introduced to high quality reproduction enthusiasts.
This is a model intended to be an introduction to the world of high quality reproduction of your favourite music. It was designed with simplicity of topology in mind, to minimize preamplifier’s influence on signal going through it. This is a redesigned and mechanically enhanced device packing after a successful sound testing by 6moons.

Circuit topology

With a belief that simple circuits are the best sounding, only one, class A, single ended amplification stage was chosen, with the shortest signal path possible.
As amplification device, 6N1P double triode was chosen after years of experience and listening tests of custom made preamplifiers. Also, because of listening tests, for grid bias, a 1.2 V nickel-cadmium accumulator was used from cathode to ground. With it, the sound is much more transparent, frequency response is better and amplification is maximized. Anode load resistor is noninductive wire resistor manufactured by RCD. Signal path capacitors are MUNDORF MCap Zn. Volume potentiometer is renowned ALPS (blue).
To obtain the shortest signal path possible and avoid the influence of internal wiring, printed circuit board is soldered directly to the input and output RCA connectors and all the components are on the same, two layers printed circuit board. Signal output is from anode. Anode supply is non-regulated +250V (C-L-C-R-C), and for 6N1P cathode heater supply is shunt regulated 6.3V. Anode supply filtration uses high quality high frequency (105*C) electrolytic capacitors made by CORNELL DUBILIER and non-inductive metal oxide resistors.

Sound Quality

The sound quality of SA-1 preamplifier is characterised with:
Transparency
Dynamics
"Air" around instruments
Timbre
Resolution
Details

Design considerations:

* Class A
* Star Grounding
* Zero feedback
* Regulated shunt DC filament supply
* Torodial power transformer
* Battery bias

Specifications:

* Tube complement: 1 x 6N1P
* Input impedance: >100K
* Output impedance: >1K
* Frequency response: -3dB 3Hz to 83KHz (volume control at 10 o'clock)
* Absolute polarity: inverting
* Gain: 26dB
* S/N: >85dB
* Channel separation: 65dB
* Distorsion: 0.07%
* Dimension: 430mm X 100mm X 305mm (W x H x D )
* Weights: 7Kg

Parts:

* Anode Resistors:Non Inductive Wire Ground RCD
* Grid Resistors: Metal Film 1%
* Coupling capacitors: Mundorf MCap Zn Audiophiler
* Electrolitic capacitors: Corne;; dubilier high frequency switching (105*C)
* Potentiometers: ALPS (Blue)
* Signa wire: solid core, 99,99% pure silver
* Powers Supply wire:VAN DEN HUL SCS18 (Silver plated, teflon insulated)
* Gold Plated teflon isolated RCA connectors

Importeur:
East West Audioshop
tel.nr.: 024-3503220

Website importeur: www.eastwestaudioshop.nl
Email importeur: info@eastwestaudioshop.nl