Atma-Sphere Atma Sphere UV-1Ultraviolet
Basic Tube Preamplifier / Headphone Tube Amplifier
The UV-1 (UltraViolet) preamplifier is based on a circuit that we have used for many years, but not marketed before. About 40 years ago, Ralph Karsten began developing his own circuit for use for friends on a budget but with high end audio aspirations. It was originally used as a modification to the venerable Dynaco PAS-3. Over a period of decades, the circuit has seen a lot of refinement. It is a simple circuit (and obviously a complete departure from our other products), based on a very capable and refined 6SN7-based line section with a simple phono section based on 12AT7s. We have seen this preamp best preamps costing up to five times more; when we say 'refined', we mean it!
We never really considered marketing the preamp as it is so different from the rest of our product line. But friends and associates convinced us that we had something special, especially for its price so here it is.
The preamp is available in four forms: a basic line stage, a headphone power amp that also works as a line stage, a full function preamp with high output MM capability, or with the addition of a set of Jensen stepup transformers works with any low output moving coil cartridge as well.
The headphone version of the UV-1 uses the full tube complement of the UV-1. It has four inputs and can be used as a line stage as well. This version does not have a phono section.
Features
- Simple zero feedback line section
- Cardas RCA connectors used thoughout- Standard dual output connections, optionally reconfigurable
- Shunt-style balance control
- Heavy-duty seamless aluminum chassis
- Precision components used throughout- Low-noise "star" grounding topology- Three-year general coverage warranty - One year warranty on tubes
WATT RECOMMENDS
Save your favorites. Compare them anytime.
Create a free HiFi Hub account to save products to your Wishlist and compare your favorites side by side.
Watt'n Potatoes
Not yet rated
This product doesn't have a Watt'n Potatoes score or editorial summary yet.
WATT RECOMMENDS
Save your favorites. Compare them anytime.
Create a free HiFi Hub account to save products to your Wishlist and compare your favorites side by side.
Reviews & Sources
Online Reviews & Mentions
YouTube Reviews
No reviews found yet
Forum Mentions
No forum mentions found yet
Specifications
- Line stage frequency response
- 2 Hz-200 KHz, +0 dB, -2dB
- Line stage gain
- 15 dB
- Line stage input impedance
- 100 Kohm Ω single-ended
- Line stage output
- 12V; 17VRMS at clipping
- Output impedance
- 400 Ohms from 2Hz to 100KHz
- Phono stage input impedance
- 47 K Ω
- Phono stage input overload
- 500 mV
- Phono stage gain
- 70 dB (Low Output Moving Coil version)
- Phono bandwidth
- 5 Hz-90 KHz within ¾ dB
- RIAA accuracy
- Within .1 dB
- RIAA Phono sensitivity
- ( for 0.5 V @ 1 KHz ) 0.15 mV
- Tube complement
- 2 x 12AT7 phono 2 x 6SN7GT line section
- Dimensions
- 15 3/8" wide x 7.5" deep x 5." high
- Weight
- 7 lbs.
- Warranty
- Three years, transferable One year for tubes
Manufacturer's Description — Atma-Sphere
Basic Tube Preamplifier / Headphone Tube Amplifier
The UV-1 (UltraViolet) preamplifier is based on a circuit that we have used for many years, but not marketed before. About 40 years ago, Ralph Karsten began developing his own circuit for use for friends on a budget but with high end audio aspirations. It was originally used as a modification to the venerable Dynaco PAS-3. Over a period of decades, the circuit has seen a lot of refinement. It is a simple circuit (and obviously a complete departure from our other products), based on a very capable and refined 6SN7-based line section with a simple phono section based on 12AT7s. We have seen this preamp best preamps costing up to five times more; when we say 'refined', we mean it!
We never really considered marketing the preamp as it is so different from the rest of our product line. But friends and associates convinced us that we had something special, especially for its price so here it is.
The preamp is available in four forms: a basic line stage, a headphone power amp that also works as a line stage, a full function preamp with high output MM capability, or with the addition of a set of Jensen stepup transformers works with any low output moving coil cartridge as well.
The headphone version of the UV-1 uses the full tube complement of the UV-1. It has four inputs and can be used as a line stage as well. This version does not have a phono section.
Features
- Simple zero feedback line section
- Cardas RCA connectors used thoughout- Standard dual output connections, optionally reconfigurable
- Shunt-style balance control
- Heavy-duty seamless aluminum chassis
- Precision components used throughout- Low-noise "star" grounding topology- Three-year general coverage warranty - One year warranty on tubes
Verified Dealers
Online Dealers
All Dealers
Zoom out the map to see more dealers
Authorized dealers for Atma-Sphere Atma Sphere UV-1Ultraviolet
- Afton Mountain Audio — in-store — Afton, Virginia, United States (website)
- Audio Perfection — online and in-store — Minneapolis, Minnesota, United States (website)
- Audio Revolutions — in-store — Khwaeng Thung Phaya Thai, Krung Thep Maha Nakhon (website)
- Phantom Audio — in-store — Jakarta, Jakarta, Indonesia (website)
- Salon One Audio — in-store — Ormond Beach, Florida, United States (website)
- Signature Sound — in-store — Liverpool, New York, United States (website)
- Sounds Of Silence — in-store — Nashua, New Hampshire, United States (website)
- Sun Mountain AV — in-store — Colorado Springs, Colorado, United States (website)
- Triode Picture + Sound — in-store — New York, New York, United States (website)
- USA Tube Audio — online and in-store — Phoenix, Arizona, United States (website)
and 1 more verified dealer