Beauty in the world follows in it's proportions the golden section!

We at Trenner & Friedl deal with these natural phenomena for more than 25 years.

Not only to create beautiful speakers, but above all to achieve a harmonious and natural sound.

But no speaker was as close to this goal as PHI:
The inner division, the special bracing, the milled segments of the front to prevent bending waves, the driver unit, the cables, the derivative of the Structure-borne noise with different speeds of sound:

All this submits to the golden ratio.

Phi is a point source that is clearly designed to work in harmony with high-end amplifiers. With the special eye and attention to fine tube amplifier.

The poetry of the golden section, the sound of nature.

Large stand mounted speaker
Golden ratio proportions
Multiplex birch wood of different densities
Milled segments on the baffle to prevent bending waves
Multi layered lacquer finish
Fullrange loudspeaker for ideal impulse and phase response
Paper cone impregnated with Italian oil varnish
Cardas internal wire, also constructed in golden ratio proportions
Cardas terminals
Finest crossover components by Mundorf
Designed for tube amplifires
Drive Units
1 x 8" paper cone with papyrus fiber coated with violin varnish
Frequency response
46 Hz (f-3 DB) to 20 kHz (f-3 DB)
92 dB (2.83V/1m)
8 Ohm (minimum 7.3 Ohm at 230 Hz)
Height (without stand):
650 mm
Height (with stand):
1050 mm
400 mm
250 mm
21 kg
Finishes Body
Iced Oak
Others on request