In this review, we will be comparing two different type of speakers by Triangle. Triangle Signature Theta is a Bookshelf speaker whereas the Alpha is a Floor-standing speaker.
Let's have a brief look at the main features
of Triangle Signature Theta and Triangle Signature Alpha first before getting into our more
detailed comparison.
Triangle Signature Theta Key Specs
- 2-way Design
- 1" Horn-Loaded Tweeter
- 6.5" Fibreglass Woofer
- 45-20k Hz Frequency Response
- 90 dB Sensitivity
- Impedance: 8ohms
- Power Range:25-130watts
- Weight:11.50kg
- 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 )
Triangle Signature Alpha Key Specs
- 3-way Design
- 1" Horn-Loaded Tweeter
- 6.5" Midrange
- 3 x 6.5" Double ferrite fibreglass Woofer
- 6.5" Midrange
- 32-22k Hz Frequency Response
- 92 dB Sensitivity
- Impedance: 8ohms
- Power Range:60-500watts
- Weight:34.50kg
- Dimensions (H x W x D): 50" x 9-3/16" x 14-5/8" ( 1270.0 x 233.0 x 372.0mm )
Theta and Alpha 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 Alpha 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 Alpha |
| Near-field |
Average |
Are you nuts? |
| Small Room |
Good |
Poor |
| Mid-size Room |
Average |
Average |
| Large Room |
Poor |
Good |
| Very Large Room |
Bad |
Good |
(* 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.)
In the following sections, we will get into more detail in order to better understand how the Triangle Signature Theta and Triangle Signature Alpha compare and hopefully end up with enough arguments to decide which one of these loudspeakers is the better choice for you.
**This post contains affiliate links, and I will be compensated if you make a purchase after clicking
through my links. As an Amazon Associate I earn from qualifying purchases.
Drivers
One of the fundamental differences between these two speakers is that Theta is a 2-way design whereas the Alpha is a 3-way speaker. 3-way designs utilize a midrange driver in addition to the tweeter and woofer on 2-way designs. Designing a crossover for a 3-way speaker is a complicated process and generally increases the overall cost of the speaker.
| Driver |
Triangle Signature Theta |
Triangle Signature Alpha |
|
Driver Setup
|
2-way
|
3-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
1 x 6.5-inch |
|
Woofer
|
1 x 6.5-inch
|
3 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 Alpha features a 1" Titanium dome Horn-Loaded Tweeter , a 6.5" Midrange and 3 x 6.5" Double ferrite fibreglass Woofer with a Crossover frequency at 290Hz and 2600Hz.
Frequency Response
Theta has a frequency range of 45-20k Hz whereas Alpha has a frequency range of 32-22k Hz. With a minimum frequency of 32Hz, the Alpha can go significantly deeper on the low side and provide stronger bass compared to the Theta's min frequency of 45Hz.
Below graphs depict how these two speakers compare with the max, min and average values of the Min and Max Frequencies of other speakers in the Bookshelf class in our database.
Low Frequency
Bookshelf Speakers
High Frequency
Bookshelf Speakers
None of these speakers achieves full range experience which is commonly agreed as 20Hz-20kHz. In order to achieve lower lows / deeper bass, we recommend you pair these with a subwoofer. Visit our Powered Subwoofers section to find out more about the available options.
Impedance and Sensitivity
Theta and Alpha have the same Impedance of 8 ohms but where they differ is the sensitivity levels. Theta sensitivity is rated at 90 dB and the Alpha's is at 92 dB. This 2 dB difference makes the Triangle Signature Alpha a more sensitive speaker compared to Triangle Signature Theta, hence will play louder with the same amount of watts.
Sensitivity
Bookshelf Speakers
Power Range
Power
range is the range of input power in watts RMS that a loudspeaker is designed to handle. While using
an amplifier within this range ensures the nominal performance , inputting a power that is higher than the
max wattage can result in a damaged speaker.
Theta can handle a max power of 140 watts RMS from the amp the whereas Theta has a max power handling value of 90 watts RMS , 50 watts less than the Alpha.
Keep in mind that a higher max power handling value doesn't necessarily make that a louder speaker
compared to a lower max handling speaker. Loudness or the sound level is also impacted by parameters
such as Impedance, sensitivity and system efficiencies.
Input Type and Bi-Amping / Bi-Wiring
Theta features Binding post type posts and Alpha has a Binding post type posts. None of these speakers feature bi-amping/bi-wiring.
Cabinet Type and Port Position
Both Theta and Alpha 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
Size of a speaker can sometimes become 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 Alpha'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 Alpha has external dimensions of 1270.0 x 233.0 x 372.0mm ( 50 x 9-3/16 x 14-5/8inch) .
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 Alpha is approximately 866.8cm2 / 134.4inch2.