High efficiency full range speakers--with no crossover--give the best possible sound.

Now buy the best amplifier to go with high efficiency speakers:

Audio Formosa EL84 Ultralinear, 10 watts per channel, Class A/B vacuum tube stereo amplifier

 

 

Audio Formosa EL84 Ultralinear Vacuum Tube Stereo Amplifier

We sell only the highest quality 'neutral sounding' amplifiers.  We don't sell 'boutique' amplifiers, designed with a particular sound.  Most amplifier companies sell these, so they can sell you a different amplifier every few months.  

We only want to sell you one amplifier, which you can keep for life.  

We have not heard better sounding amplifiers, anywhere, at any price.  Our tube amplifiers are the only ones ever designed with, and optimized for, high efficiency full range speakers and other high efficiency speakers.

 

This is an incredible sounding vacuum tube stereo amplifier--professionally assembled and tested--for about the same price as many kit amplifiers.  Full, deep, rich bass.  Extended highs.  Ultralinear circuit uses an extra set of windings in the output transformers.  This gives the smoothness of SET amps with the power and dynamics of a push/pull design.  And lower distortion than both.  The Audio Formosa EL84 uses the two most popular vacuum tubes of all time. 

The EL84 X 4 power tube. 

The

12AX7 / ECC83 X 1

12AU7 / ECC82 X 1  

small signal tube.

10 watts per channel--all you need with the highest quality high efficiency speakers.  

4 ohm and 8 ohm terminals. 

Two inputs with selector.   Dual voltage:  115 volts or 230 volts. 

Parts are chosen for the best possible sound quality. 

Each amplifier is beautifully hand assembled and tested.  To maintain the superb sound, there are no adjustments to be made--ever. 

And made with the fewest parts possible and best sounding tubes. 

Stereo amplifiers are MUCH better than monoblocs because the left and right channels are always in perfect balance.

 

 

 

Features

EL84 Ultralinear vacuum tube stereo amplifier.

Four EL84 and two 12AX7 / ECC83 X 1

12AU7 / ECC82 X 1 vacuum tubes.

Conservatively rated at 10 watts per channel.

Hand wired. No integrated circuits.

Transformers wound in our own factory.

Polished stainless steel chassis.

Brushed, machined, aluminum face and back plates.

4 and 8 ohm gold plated metal speaker terminals.

3 sets of RCA inputs to connect to any audio device.

Headphone output

Built in Bluetooth

By pressing the AUX1 / AUX2 / AUX3 / Bluetooth / Volume - / Volume + button on the remote, it is simple, convenient and easy to use.

With LED Large display screen VU meter can dynamically decorate audio environment and provide incomparably visual effects when switching audio signals.

Voltage selector for 115 or 230 volts.

Excellent build quality will ensure years of reliable service.

 

 

 

Specifications

INPUT IMPEDANCE: 100K ohm (RCA)

OUTPUT IMPEDANCE: 4 ohm - 8 ohm

OUTPUT POWER: 10W into 8 ohms, CLASS AB

DAMPING FACTOR: >3

FREQUENCY RESPONSE: 20Hz-20KHz -1dB

T.H.D.: <1% 20Hz-20KHz (REF. OUTPUT)

TOTAL GAIN: 32dB

INPUT SENSITIVITY: 300mV - 600mV

S/N: >90dB (HUM NOISE <1.5mV)

CHANNEL BALANCE: <1dB 20Hz-20KHz (MAX. VOLUME)

CHANNEL SEPARATION: >65dB 20Hz-20KHz

TUBE COMPLEMENT:

Preamp tubes

12AX7 / ECC83 X 1

12AU7 / ECC82 X 1

Power tubes EL84 x 4

POWER REQUIREMENT: AC 230V or 115V ±5%. 50/60Hz

DIMENSIONS: L x W x H  295 mm × 220 mm × 250 mm – 11.5 x 8.5 x 9.5"

WEIGHT: N.W.:  11.5 KGS - 25 lbs.

G.W.:  13.5 KGS - 30 lbs.

 

Warranty

All Audio Formosa amplifiers are covered by a one year warranty.   Tubes are covered by a 90 day warranty.