hifi engine

Manual Library / Infinity

Infinity Quantum 4

Three Way Loudspeaker System (1977)

add a review add a review

Infinity Quantum 4


We thought it was impossible to bring our Quantum Series technology down to this size and price, intact.

We proudly announce we were wrong. The Infinity Watkins Dual Drive Woofer fluently translates every signal between 35 and 600 Hz. With it's combination of power and clarity - with it's preservation of characteristic timbres - the bass output is remarkably close to the original.

As in the larger Quantum Series models, Quantum 4's EMIT upper range remains smooth all the way to 32,000 Hz.

The sound of this speaker testifies eloquently that with Infinity, buyers who must compromise on the cost of elements of their music systems need not make dispiriting, sacrifices on quality.

The Quantum 4 seems certain to set a new industry standard for compact three-way speakers.


Type: 3 way, 3 driver loudspeaker system

Frequency Response: 35Hz to 32kHz

Recommended Amplifier: 50 to 250W

Crossover Frequency: 600, 4000Hz

Bass: 1 x 300mm dual voice coil

Midrange: 1 x 38mm dome

Tweeter: 1 x EMIT

Dimensions: 910 x 380 x 300mm

Weight: 41kg

Year: 1977


instruction/owners manual   English - audiolimit

technical manual   English - tronix

Related Catalogues

Audio Products

If you have any problems opening files please read the download FAQ. All files are provided under strict licence and reproduction without prior permission or for financial gain is strictly prohibited.

If you have additional documentation please consider donating a copy to our free archive.


This website is not affiliated with or sponsored by Infinity. To purchase Quantum 4 spares or accessories, please contact the company via their website or visit an authorised retailer.