Audio SpaceRef 3.1 300BAudio Space Ref 3.1 300B Superb 300B Int amp w/phono stageAsk us about 6 months NO INTEREST & NO PAYMENTS thru PayPal Call us at 770-667-5633 with questions. Call to discuss this superb amp as well as our low current pricing.The Audio Space Ref...3999.00

Audio Space Ref 3.1 300B Superb 300B Int amp w/phono stage

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Audio Space Ref 3.1 (300B)
Time Left: 2 Days


Asking Price: $3,999.00

New Retail Price: $4,590.00

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Ships fromAtascadero, CA, 93422
Ships toUnited States
Package dimensions24.0" × 20.0" × 14.0" (75.0 lbs.)
Shipping carrierUPS
Shipping cost
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Original accessoriesBox, Manual
Agon-miniAverage Research Pricing

Ask us about 6 months NO INTEREST & NO PAYMENTS thru PayPal

Call us at 770-667-5633 with questions.

Call to discuss this superb amp as well as our low current pricing.

The Audio Space Reference 3.1 300B is a beautiful world Class 300B based integrated amplifier. It also offers an internal tube based phono stage.

The amp uses four 300B's, two 6SN7's and four 12AX7's. Transformers are all custom made for Audio Space. The Ref 3.1 produces 21 Class A watts and sounds a good bit louder than that is the real world. Wiring is point to point by hand and the amp runs Class-A Triode Push-Pull. It allows switching between different negative feedback levels to optimally match different systems. It can even be run as a separate power amp.

The amp received a full review in the Absolute Sound by Dick Olsher in August 2009. Dick summed up with:

"It should be obvious by now that I'm wildly enthusiastic about this integrated amp. The Audio Space Reference 3.1 (300B) offers a path toward enlightenment of being one with the music. Outfitted with a vintage pair of 6SN7 or even inexpensive 7N7 triodes, its musical pleasures would be captivating at any price point. Considering its asking price, it earns my nomination for a Product of the Year award."

Read the entire review at:

The Ref 3.1 is a wonderful amp that is the class of its price range and this type of amplifier.

Rugged stainless steel chassis
High quality EI transformers and components
Switching between direct and line input
Switching between high and low negative feedback
Tube moving magnet phono stage
Innovative tube circuitry with choke coil
Point to point soldering

Read our over 12,500 points of AudiogoN #1 rated feedback and call to discuss this superb amplifier.

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Input Impedance: >56K ohm (RCA/Direct In)
Output Impedance: 4, 8, 16 ohm
Output Power: 21W/ch (Class-A push-pull)
T.H.D.: 200mV, 3-5mV (mm phono in)
S/N Ratio: greater than 80dB (hum noise under 3mV)
Tubes: 4 x 300B, , 2 x 6SN7, 4 x 12AX7 (ECC83)
Dimension: 18.5"d x 16"w x 8"h
Weight: 65 lbs

Brands carried:
Acoustic Zen, April Music, Audio Space tube electronics, Audeze headphones, Auralic music streamers & DAC's, Bob Carver tube amps and loudspeakers, Burson Audio, Cambridge, Creek, DSPeaker room correction, Emerald Physics speakers, amplifiers & DSP crossovers, Epos, Exogal DAC's & amplifiers, Focal headphones, Gallo speakers, Graham Slee, Jolida tube electronics, LSA speakers, Lehmann phono stages, Marantz Reference, Micromega, Music Hall, Mu-So by Naim, Ortofon cartridges, Peachtree Audio, Project turntables, PS Audio, Quad, Scansonic speakers, Silverline Audio speakers, Sumiko subwoofers & cartridges, TriangleART turntables, Wireworld & Wywires cables

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Underwood Hifi, Inc.  Verified Dealer

Last 12 months

Member since November 2009