The EmeraldTrue transmission technology * Hybrid design * Halogeen free

Balanced Preamplifier

The Emerald balanced preamplifier is the next logic step after the introduction of The Grail SB. 

Stereo line-level preamplifier, fully balanced amplifier design with special “accumulator simulation” power supply (ASPS) design. The transformer resides in an external housing.
The amplifier design allows so-called mixed mode operation (balanced-to-unbalanced and vice versa). So a combination like  “unbalanced in / balanced out” is also possible like balanced in / unbalanced out” or “unbalanced in / unbalanced out” resp. “balanced in / balanced out”.
Amplifier circuit design with no overall negative feedback and cascaded input stages plus MOSFET output stages. All functions are controlled by an infrared remote control milled from a solid aluminium block. Status indication (choosen input, level attenuation, balance control etc.)  by liquid crystal display (LCD) at the amplifier front.

We have used the same design ideas from our Grail SB, like the complete balanced DC coupled circuitry, HF PCB with 24 carat gold connections and 0.1% precise selected components. The very innovative electronic circuitry is able to handle a mix of balanced and unbalanced signals both on the input and output.

To adjust all essential replay values, a remote control is part of the design. The channel to be used, the replay levels and possible channel unbalance can be fine-tuned.

To avoid any spurious signals and magnetic induction, the amplifier housing is made of 6 & 10 mm thick steel.

Specifically, the very natural and specific spacious replay is a benchmark of The Emerald. The very high resolution in combination with the natural dynamics in replay is another remarkable property.
Mains voltage: optional 230V or 115V
Weight: 19kg (w/o ext. transformer housing)

Input connectors and input resistance:

– Remote controlled inputs: 2 balanced stereo inputs + 2 unbalanced stereo inputs

– Input resistance: 10KOhms resp. to ground

Output connectors  and output resistance

– output: 1 balanced stereo output + 1 unbalanced stereo output. both outputs (bal. + unbal.) are simultaneously available if input resistance of the following power     amplifiers are above 10KOhms in parallel circuit.
– output impedance (on all outputs): appr. 350 Ohms
– output voltage: >= 6Vss on balanced output.

Bandwidth and distortion

– appr. 5Hz … 20KHz +- 0.2dB
– distortion: less 0,01% (1KHz) at 1Vrms at balanced output.

Level adjustment

remote controlled 128-step level attenuator with special low-level signal relais (switched resistor array with constant input resistance)  with 0,75dB/step

max. attenuation: -95,25dB. The step level attenuator circuit also makes possible a channel balance adjustment and a signal muting function, also operated by the infrared remote control.

The Emerald

Specifications

Following

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Cinema Focus (India) Pvt.Ltd.
New Decor Towers, Dr Radha Krishnan Salai, Sullivan Garden, Mylapore, Chennai, Tamil Nadu 600004, India
Alef Hi-Fi
1-Y Nagatinskiy Proyezd, 10, стр. 1, Moskva, Rusland, 115230
Ultimate Audio
R. Casquilha 2A, 1500-151 Lisboa, Portugal
Zesen Hi-Fi Company
Shantou, Guangdong, China
Roksan Trading Co. (phono only)
Hongkong, Kwun Tong, Flat B2, 12/F, Good Luck Industrial Building, 105 How Ming StreetKowloon, Hong Kong
Point International General Trading LLC. Dubai
Baniyas Street, Opp.Etisilat Tower, Dubai Creek - Dubai - Verenigde Arabische Emiraten
JWON Korea Co. (Audio cables)
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ODO Intonation
Minsk, Wit-Rusland
HI END SOUND RAMALA
AVTEC Limitada
Sta. Verónica 741, Las Condes, Región Metropolitana, Chili
Kraske Electronics A.G.
Leonhardsgraben 52, 4051 Basel, Switzerland
B & T HiFi Vertrieb GmbH
Hauptstraße 27, 40699 Erkrath, Germany
Finest Fidelity Inc.
3 Sagebrook Dr, Bluffton, SC 29910, USA
Casa Tentaciones
Adrian Jara esquina Regimiento Piribebuy, Shopping Hijazi, Cd. del Este 7000, Paraguay
Sky-C Solutions B.V.
Azorenweg, Willemstad, Curaçao
Star Audio
Martínez, Buenos Aires Province, Argentina
HBD Audio Revelations
22 Retief Pl, Carrington Heights, Berea, 4001, South Africa
Sarl Equip Auto
Pape'ete, French Polynesia
Audio Active
90 Bridport St, South Melbourne VIC 3205, Australia
The Experts Private Group Limited – Malaysia Boutique Showroom
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Jl. Tanjung Duren Raya No.1, RT.11/RW.1, Tanjung Duren Utara, Grogol Petamburan, RT.11/RW.1, Tj. Duren Utara, Grogol petamburan, Kota Jakarta Barat, Daerah Khusus Ibukota Jakarta 11470, Indonesia
Woori Audio (Phono and electronics only)
610-9 Junggok-dong, Gwangjin-gu, Seoul, Zuid-Korea
Sounds Inc.
Cairo street, in front of Babel theater, Hamra, Salamoun Bldg, 1st floor, Beirut, Lebanon
Arama Audio
Moshe Sharett St 29, Rishon LeTsiyon, Israel
Royal Asia Corp.
No. 60, Minzu East Road, Zhongshan District, Taipei City, Taiwan 10491
Extreme Audio
Yol Mevkii Sheraton B2 Kat 34398, Maslak Mahallesi, Eski Büyükdere Cd. No:3, 34752 Şişli/İstanbul, Turkey
Esoteric
206-8530, Japan
Kang Yong Company Ltd.
55/17-18, Phyathai Road, Thanon Phayathai, Khet Rajthavee, Bangkok, 10400, Thailand
SAIGON HI-END CO., LTD
8A Lý Thường Kiệt, phường 12, Quận 5, Hồ Chí Minh, Vietnam
Hi-Fi Magic
Kathmandu 44600, Nepal
Karma Digital Ltd.
Boryslavska St, 53, Kyiv, Ukraine
Digitalbild Sverige AB
Tellusvägen 9, 191 47 Sollentuna, Sweden
Big Bang
Šmartinska cesta 152, 1000 Ljubljana, Slovenia
Platan
M. R. Štefánika 261/12, 920 01 Hlohovec, Slovakia
Korato
Mileševska 66, Beograd 11000, Serbia
Stereomag.ro
Strada Vasile Alecsandri 14, București, Romania
Audio Marketing
Via del Meridiano, 38, 47895 Domagnano, San Marino
Mono AS
Østerdalsgata 1, 0658 Oslo, Norway
Alfa Audio
Skopje 1000, Macedonia (FYROM)
UAB “A CAPPELLA”
Aušros Vartų g., Pasažo skg. 5, Vilnius 01304, Lithuania
Balt Audio
Brīvības iela 169, Vidzemes priekšpilsēta, Rīga, LV-1012, Latvia
Samat Electronic Ltd.
Karasai Batyr St 88, Almaty, Kazakhstan
MPI Electronic Srl.
Via Edmondo de Amicis, 10, 20010 Cornaredo MI, Italy
Cloney Audio
55 Main St, Blackrock, Co. Dublin, A94 W4F3, Ireland
Zebraudio
Budapest, Trombitás út 26, 1026 Hungary
Exclusive Audio
Ioannou Apostolopoulou 59, Chalandri 152 31, Greece
Technology Science & Art
6 Allée Pier Jakez Helias, 77600 Bussy-Saint-Georges, France
AH-Hifisystems OV
Helletorpankatu 39, 05840 Hyvinkää, Finland
Mobicom Systems AS
Toompuiestee 18, 10137 Tallinn, Estonia
High-End Audio Studio
Belgická 278/4, Vinohrady, 120 00 Praha-Praha 2, Czechia
P.K. Digital Hi-Fi Ltd.
Ifigenias, Nicosia, Cyprus
Nove Boje Zvuka D.O.O.
Ul. grada Vukovara 52, 10000, Zagreb, Kroatië
TS Multimedia
ul. "Solunska" 39, 1000 Sofia, Bulgaria
Audio Tuning
Margaretenstraße 98, 1050 Wien, Austria
Decent Audio
Castlegate Mill, Riverside, Stockton-on-Tees TS18 1BZ, UK
Electronica Sarte Audio Elite
Carrer del Pare Jofré, 22, 46007 València, Valencia, Spain
Radioactiv
Kirkegade 150, 6700 Esbjerg, Denmark
Music2 Audio Import (Phono and electronics only)
Geestweg 40B, 2671 ED Naaldwijk, Netherlands
Audio System
Księcia Henryka Brodatego 3, Świdnica, Polen
HNNY
Venkelbaan 29, 2908 KE Capelle aan den IJssel, Nederland

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