SonicImageryLabs 995FET High Performance Discrete OpAmp

[anerdman]

995FET-Ticha Discrete Operational Amplifier

The 995FET-Ticha is a high performance discrete operational amplifier designed for professional audio applications and areas where ultra-low noise and extremely low distortion is required. A true FET input stage is incorporated to provide superior sound quality and speed for exceptional audio performance. This in combination with high output drive capability and excellent dc performance allows use in a wide variety of demanding applications. In addition, the 995FET’s wide output swing, allows increased headroom making it ideal for use in any audio circuit.

The 995FET-Ticha opamp can be operated from ±10V to ±24V power supplies. Input cascode circuitry provides excellent common-mode rejection and maintains low input bias current over its wide input voltage range, minimizing distortion. The 995FET discrete op amp is unity-gain stable and provides excellent dynamic behavior over a wide range of load conditions.

The all-discrete design uses an ultra-precision differential matched FET pair specifically designed to meet the requirements of ultra-low noise and ultra-low THD audio systems. In addition to the enhanced input stage, the 995FET uses high performance temperature stable current sources, dual matched pair temperature stable current mirrors and an enhanced low distortion high performance Class-A output driver stage.

The 995FET-Ticha discrete opamp was designed as an enhanced upgrade replacement for the Millennia Media MM-99, MM990, Forssell Technologies JFET-993, JFET-992, or similar FET based op-amp gain blocks. The pinouts conform to the 990/2520 package type, allowing direct replacement.

Features:

• Ultra Low Total Harmonic Distortion, 0.0006 THD+N @ 1kHz
• Ultra Low Noise 1.1nV/rtHz
• High Current Output Drive (250mA into 75 ohms)
• +26.5dBu Output Levels (into 600 ohms)
• Class A Output Drive
• Standard Gain Block Footprint
• Operates over ±10V to ±24V supply rails
• Lower output offset voltage than existing counterparts
• Lower input leakage current than existing counterparts
• Particular emphasis on audio performance
• Designed, assembled and produced in the USA
• 3 Year Warranty

Applications:

• High Input Impedance Line Amplifiers and Drivers
• High Input Impedance Buffer
• Active Filters and Equalizers
• Summing/Mixer Amplifiers
• High Performance High Input Impedance
Microphone Preamplifiers
• High Performance A/D front end preamplifier
• High Performance D/A back-end driver

Specifications:

http://www.sonicimagerylabs.com/products/product_images_docs/995FET_Ticha_Docs/995FET_Ticha_Datasheet_Rev0.pdf
http://www.sonicimagerylabs.com/ordering.htm

Visit www.sonicimagerylabs.com for datasheet, specifications and application information.
Datasheet and specs are to large to post here. -- Be excellent

 

[okgb]

What is the price ?

 

[Ptownkid]

$69 USD...it's on their site

 

[okgb]

Yeah I was just giving them a bump and curious to see if they check the grp

 

[anerdman]

We do check the site. $69USD retail for onesy quantity

 

[dandeurloo]

So who has these and how do they sound compared to 990's?

 

[anerdman]

Hi dandeurloo
The 995FET-Ticha discrete opamp is FET based. Its circuit topology is different from the 990Enh-Ticha, which is also different from the original Jensen 990 circuit topology from the 70's. The 995FET-Ticha is an extremely linear device and was designed to be sonicly transparent. With that being said, depending on how it is applied, IE txmr input, capacitively coupled input, etc, most users report a crystalline high end and warm tight low end. In our lab and in our studio, we find it to be transparent, fast, resolute and dynamic on guitars and basses when used in a DI application. The DI application is what it was primarily designed for but not necessarily limited to. Because of its low noise and huge dynamic range (when on +/- 24v rails) users have been using them as mic pres and adding a resistor parallel to the zobel network after the xfmr to set the desired input impedence for there application.