In this review, we will be comparing two different types of speakers by Triangle. Triangle Signature Theta is a Bookshelf speaker whereas the Gamma is a Center Channel speaker.
Let's have a brief look at the main features
of Triangle Signature Theta and Triangle Signature Gamma first before getting into our more
detailed comparison.
| Key Specs | Triangle Signature Theta | Triangle Signature Gamma |
|---|
| Brand | Triangle
France · founded 1980 | Triangle
France · founded 1980 |
|---|
| Design | 2-way | 2-way |
|---|
| Tweeter | 1" Horn-Loaded | 1" Horn-Loaded |
|---|
| Woofer | 6.5" Fibreglass | 2 x 6.5" Paper |
|---|
| Frequency response | 45-20k Hz | 45-22k Hz |
|---|
| Sensitivity | 90 dB | 90 dB |
|---|
| Impedance | 8 ohms | 8 ohms |
|---|
| Power range | 25-130 watts | up to 90 watts |
|---|
| Weight | 11.50kg / 25.3lbs | — |
|---|
| Dimensions (H x W x D) | 18-5/16" x 9-3/16" x 14-5/8"
465.0 x 233.0 x 372.0mm | 10-1/4" x 22-15/16" x 15"
260.0 x 582.0 x 381.0mm |
|---|
Theta and Gamma are members of Triangle's Signature series of speakers. Below you can find the loudspeakers from this series.
Triangle Signature Series
History
What size room are the Triangle Signature Theta and Triangle Signature Gamma speakers good for?
The size of the room in which you are planning to use these loudspeakers is an important decision
factor. Here we have compared their suitability to various sizes of environments considering their size
and max power parameters:
| Listening Environment* |
Triangle Signature Theta |
Triangle Signature Gamma |
| Near-field |
Average |
Poor |
| Small Room |
Good |
Average |
| Mid-size Room |
Average |
Good |
| Large Room |
Poor |
Average |
| Very Large Room |
Bad |
Poor |
(* Approximate Room sizes: Small < 100sq. ft / 9 m2,
Mid-size: 100-220 sq. ft / 9-20 m2, Large 220-400 sq. ft / 20-36 m2, Very Large: >
400 sq. ft / 36 m2.
Average Floor Height: 9" / 2.7m. Typical room sizes differ from country to country, and the actual
listening experience changes depending on floor height, room shape, surface materials, listening
position, speaker locations, etc.)
The sections below take each area in turn: drivers, frequency response, physical size and what you get in the box.
Drivers
Both Theta and Gamma are 2-way speakers.
Triangle Signature ThetaTriangle Signature Gamma
TweeterWoofer
Front view, drawn to scale - cabinets and drivers share one scale, so sizes are directly comparable. Hover a driver for its size.
| Driver |
Triangle Signature Theta |
Triangle Signature Gamma |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 6.5-inch
|
2 x 6.5-inch
|
Theta features a 1" Titanium dome Horn-Loaded Tweeter and 1 x 6.5" Fibreglass Woofer with a Crossover frequency at 2700Hz. On the other hand, the Gamma features a 1" Titanium dome Horn-Loaded Tweeter and 2 x 6.5" Paper Woofer with a Crossover frequency at 2500Hz.
Frequency Response
Theta has a frequency range of 45-20k Hz whereas Gamma has a frequency range of 45-22k Hz.
The graph below depicts how these two speakers compare with the max, min and average Low Frequency values of other speakers in the Bookshelf class in our database.
Low Frequency
Bookshelf Speakers
Neither pair reaches down to 20Hz, the usual definition of full-range, which is normal for speakers of this size. If you want the bottom octave for movies or bass-heavy music, add a subwoofer to whichever you choose. Visit our Powered Subwoofers section to find out more about the available options.
Impedance and Sensitivity
Theta and Gamma have the same Impedance of 8 ohms and their sensitivity is also same at 90 dB.
Sensitivity
Bookshelf Speakers
Power Range
Power
range is the range of input power in watts RMS that a loudspeaker is designed to handle. Staying
within that range gives nominal performance; driving the speaker beyond its maximum wattage can damage it.
Both handle the same maximum of 90 watts RMS, though Theta is rated 25-130 watts and Gamma up to 90 watts.
Note that higher power handling does not make a speaker louder: that depends mainly on
sensitivity and impedance. The calculator below shows how loud each of these actually plays
on a real amplifier.
Which plays louder on your amplifier?
Starting with a popular amplifier - change it to the one you own, or any you are
considering, and watch both numbers move.
Input Type and Bi-Amping / Bi-Wiring
Theta features Binding post posts which make bi-amping or bi-wiring possible. Gamma has a Binding post which doesn't feature bi-amping/bi-wiring.
Cabinet Type and Port Position
Both Theta and Gamma have front firing ports. front ported speakers offers more flexibility in placement in regards to proximity to walls&surfaces compared to rear ported speakers.
Physical Specs
The size of a speaker can sometimes be an important decision factor due to space constraints or in some cases purely for esthetic reasons. In this section, we are going to compare Triangle Signature Theta's and Triangle Signature Gamma's external dimensions. Triangle Signature Theta has external dimensions of 465.0 x 233.0 x 372.0mm (18-5/16 x 9-3/16 x 14-5/8inch) whereas Triangle Signature Gamma has external dimensions of 260.0 x 582.0 x 381.0mm (10-1/4 x 22-15/16 x 15inch).
Triangle Signature Theta is 349mm narrower and 9mm less deeper than Triangle Signature Gamma but it is also 205mm taller.
Size, drawn to scale
Both speakers and both views share one scale, so everything here is directly comparable. Hover a box for its dimensions.
One scale for both, standing on the same surface and pushed back to the same wall, so the deeper one visibly sticks out further.
Triangle Signature Gamma needs about 156% more floor or shelf area. Triangle Signature Theta is 205mm taller.
Base Surface Area Comparison
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited.
The base surface area of the Triangle Signature Theta is approximately 866.8cm2 / 134.4inch2 and base area of the Triangle Signature Gamma is approximately 2217.4cm2 / 343.7inch2. The Theta requires 61% less surface area than the Gamma which gives it a small advantage on placement in tight spaces.