Audio Research Reference 330M

45000 €

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Make music come alive in a way you will never forget

The Reference 330M puts you right there, and does not let you forget that you are listening to a living performance captured in time, just waiting to be unearthed with no potential left unrealized. The beauty, the emotion, the dynamics, the life are all there to conjure total immersion, whenever you want it.

A hand built masterpiece

The Reference 330M is the finest amplifier ever created by Audio Research, with the ability to control any loudspeaker with a vice-like grip and startling dynamic life. It is the culmination of everything we have learned over 50+ years.

It is a statement that music is king, always ready to sweep you away. Infusing new technology and circuits with the finest vacuum-tube architecture, the 330M elevates music reproduction to the highest plateau with an all-tube signal path.

From its ECC83 input to its KT170 output, with tube regulation in the power supply, the 330M proves that you can enjoy the ease of high power along with a delicacy and purity usually associated with low-power amplifiers. Tonal saturation and density accompany a specificity of recording space beyond anything we have built.

Liquidity and artistry abound, yet with blade-like edge precision when called for. Extension at both frequency extremes is state of the art even for solid state amplification. Statement-level loudspeakers capable of meaningful infrasonic bass output will be fully commanded down through their lowest octave without a hint of retreat. Stones unturned: None.

This is our heritage, the legacy created by our founder, William Zane Johnson.

FEATURES

The 330M was designed to provide ultimate performance without worry.
Auto bias assures rock-steady consistency, minute-by-minute, day in and day out.
Output tube life is 3,000 hours, providing many years of listening pleasure.
A fully-balanced design, the addition of single-ended inputs allows its compatibility with virtually any source.
12 volt triggers allow the 330M to be turned on remotely, just by powering up your Reference preamp or a master control.
RS232 control.
Auto-off control will turn 330M off if no signal is sensed in two hours (defeatable).
Fan speed control.
Tube hour meter.
4-8 ohm speaker outputs.
Tube monitor.
Meter light control allows dimming or off.
Meter action switch allows meter needle to be turned off.

SPECIFICATIONS

Power output	330 W (into 4 Ω / 8 Ω)
Topology	Hybrid design (tube signal path with JFET driver stage)
Tube complement	6 × KT170 (output) · 1 × ECC83 · 2 × 6H30 · 1 × 6550
Tube biasing	Auto-bias system
Inputs	1 × XLR (balanced) · 1 × RCA (single-ended)
Output taps	4 Ω · 8 Ω
Frequency response (-3 dB)	5 Hz – ~100 kHz
Power bandwidth	5 Hz – 70 kHz
Input sensitivity	2.4 V RMS (balanced)
Input impedance	200 kΩ (balanced) · 100 kΩ (single-ended)
Gain	~26 dB (balanced)
THD	~0.92% at full power · ~0.013% at 1 W
Negative feedback	~14 dB
Damping factor	~14
Controls / Features	12 V trigger · RS-232 · tube hour meter · fan speed control · auto-off standby
Display	GhostMeter® analog VU meter
Power consumption	~400 W at rated output · ~260 W idle · ~1 W standby
Dimensions (W × H × D)	438 × 254 × 457 mm
Net weight	~45–46 kg