Audio SpaceRef 3.1 300BCall me at 770-667-5633 or email 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 worl...4590.00

Audio Space Ref 3.1 300B Superb Integrated amp [Expired]

no longer for sale

Call me at 770-667-5633 or email 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 superb 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

We accept Visa, MasterCard & money orders. Read our over 11,600 points of AudiogoN #1 rated feedback and buy with confidence.

Call 770-667-5633 with questions or to order this superb integrated amplifier.
GA residents add 6% sales tax.

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: > 80dB (hum noise < 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, Ampzilla amps & preamps, Audio Space tube electronics, Bob Carver tube amps, Creek, Denon, Emerald Physics, Epos, ERA, Furutech ADL, Gallo, Gini Systems, Graham Slee, Jolida, LSA amps and speakers, Marantz Reference, Modwright, Mordaunt Short Loudspeakers, Music Hall, Peachtree Audio, Project, PS Audio, PurePower AVPS, Quad, Raysonic, Rolls Bellari, Silverline Audio, SONOS, Spatial Computer, Spread Spectrum Technologies, VMPS Loudspeakers, WADIA, Wireworld, Wyred 4 Sound, Wywires

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Seller Information

Underwood Hifi, Inc.  Verified Dealer

Last 12 months

Member since November 2009