Trenner&Friedl PHI Standmount Fullrange Loudspeakers 

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. 

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

LESS IS MORE

So many HiFi products are designed with an eye towards – good question, really… We so often are confronted with technical-looking monsters that fit into a living room about as well as a production-line assembly robot. 
Most listening rooms in this world are living spaces – spaces in which, “among other things,” we listen to music. We pay attention to this: with their peaceful, modest, yet modern forms, our loudspeakers integrate easily into almost any living room environment. 
Design cannot just be its own sole purpose. It requires a focus. And perhaps our view of HiFi is best compared with a bookcase: stylish, unassuming, yet meaningful, a pleasant part of the room – just that, instead of reaching for something to read, if desired, one can select a piece of music…and, oh, such music!

LISTENING ROOM, LIVING ROOM

Many HiFi manufacturers have a problem – they live in a world of listening rooms. Most of us, however, live in living rooms and wish to also hear music there – a conflict that naturally leads to problems. 
We design our products to be “living room friendly,” they are designed such that they may be placed as close as 10 cm (4”) away from the wall. 
And while, because of their radiation characteristics, small or narrow loudspeakers are difficult to integrate into a living space, ours deliver more direct radiation to the listening space via their wide front baffle – therefore, you can enjoy superb music, yet continue “living” in the room as before… actually, in fact, better.

Not Only Silence is Golden

There are some things that cannot be improved. However, one can use them to improve something else: the Golden Ratio, for example. This construction principle has been known since Antiquity and we humans intuitively sense its proportions as harmonic. The system of musical intervals is constructed on the basis of the proportional relationships of the golden ratio…even the plant world follows these rules in its growth patterns. 

Consequently, we construct the cabinets of our loudspeakers using golden ratio proportions, thereby naturally pleasing both the eyes and the ears simultaneously. And since we are already talking about naturalness:

We use resonance-optimised Birch plywood of differing thickness in our cabinets and build the cabinets by hand. We damp the cabinet interiors with Austrian sheep’s wool. On the one hand, this reflects our commitment to sustainability in the production of our products, on the other hand, our tests have shown that natural materials, properly executed, are sonically superior to synthetic materials. It is often the simple things that achieve the best results.

What goes in comes back out…

That it is the inner values that count in the end is an often heard and well-proven adage. Loudspeakers from Trenner & Friedl distinguish themselves not only in their perfectly finished exterior – the exceptional musicality of our products is built from an equally sophisticated and ingenious inner life: 
The musical signal is received by generously proportioned, rhodium-plated pure copper Cardas terminals, then passed along through Cardas inner-cabling. Our crossovers are carefully hand-constructed from the finest elements: 

• Premium Mundorf capacitors, for long life, faster response and balanced tone,
• baked-lacquer coils, flat copper coils with extremely low skin-effect, 
• metal-film resistors for purest reproduction of high-frequencies.

We treat the paper cones of our low-frequency drivers with seven layers of Italian oil varnish, in order to optimize elasticity, damping and stiffness, and reduce cone resonances and distortion. 
Simply stated: only that which you put in comes back out – our loudspeakers.

Specifications 

Features:
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 amplifiers
 

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)
 

Sensitivity:
92 dB (2.83V/1m)
 

Impedance:
8 Ohm (minimum 7.3 Ohm at 230 Hz)
 

Dimensions:
Height (without stand): 650 mm
Height (with stand): 1050 mm
Width: 400 mm
Depth: 250 mm
Weight: 21 kg