In this review, we will be comparing two different types of speakers by Triangle. Triangle Signature Delta is a Floor-standing speaker whereas the Theta is a Bookshelf speaker.
Let's have a brief look at the main features
of Triangle Signature Delta and Triangle Signature Theta first before getting into our more
detailed comparison.
| Key Specs | Triangle Signature Delta | Triangle Signature Theta |
|---|
| Brand | Triangle
France · founded 1980 | Triangle
France · founded 1980 |
|---|
| Design | 3-way | 2-way |
|---|
| Tweeter | 1" Horn-Loaded | 1" Horn-Loaded |
|---|
| Midrange | 6.5" | — |
|---|
| Woofer | 2 x 6.5" Fibreglass | 6.5" Fibreglass |
|---|
| Frequency response | 35-22k Hz | 45-20k Hz |
|---|
| Sensitivity | 92 dB | 90 dB |
|---|
| Impedance | 8 ohms | 8 ohms |
|---|
| Power range | 60-300 watts | 25-130 watts |
|---|
| Weight | 33.00kg / 72.6lbs | 11.50kg / 25.3lbs |
|---|
| Dimensions (H x W x D) | 46-1/16" x 9-3/16" x 14-5/8"
1170.0 x 233.0 x 372.0mm | 18-5/16" x 9-3/16" x 14-5/8"
465.0 x 233.0 x 372.0mm |
|---|
Delta and Theta 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 Delta and Triangle Signature Theta 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 Delta |
Triangle Signature Theta |
| Near-field |
Bad |
Average |
| Small Room |
Poor |
Good |
| Mid-size Room |
Average |
Average |
| Large Room |
Good |
Poor |
| Very Large Room |
Average |
Bad |
(* 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
One of the fundamental differences between these two speakers is that Delta is a 3-way design whereas the Theta is a 2-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.
Triangle Signature DeltaTriangle Signature Theta
TweeterMidrangeWoofer
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 Delta |
Triangle Signature Theta |
|
Driver Setup
|
3-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
1 x 6.5-inch |
- |
|
Woofer
|
2 x 6.5-inch
|
1 x 6.5-inch
|
Delta features a 1" Titanium dome Horn-Loaded Tweeter, a 6.5" Midrange and 2 x 6.5" Fibreglass Woofer with a Crossover frequency at 280Hz and 2750Hz. On the other hand, the Theta features a 1" Titanium dome Horn-Loaded Tweeter and 1 x 6.5" Fibreglass Woofer with a Crossover frequency at 2700Hz.
Frequency Response
Delta has a frequency range of 35-22k Hz whereas Theta has a frequency range of 45-20k Hz. With a minimum frequency of 35Hz, the Delta can go significantly deeper on the low side and provide stronger bass compared to the Theta's min frequency of 45Hz.
The graph below depicts how these two speakers compare with the max, min and average Low Frequency values of other speakers in the Floor-standing class in our database.
Low Frequency
Floor-standing 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
Delta and Theta have the same Impedance of 8 ohms but where they differ is the sensitivity levels. Delta sensitivity is rated at 92 dB and the Theta's is at 90 dB. This 2 dB difference makes the Triangle Signature Delta a more sensitive speaker compared to Triangle Signature Theta, hence will play louder with the same amount of watts.
Sensitivity
Floor-standing 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.
Delta can handle a max power of 120 watts RMS, whereas Theta has a max power handling value of 90 watts RMS, 30 watts less than the Delta.
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
Both Delta and Theta features dual binding post speaker terminals for bi-amping or bi-wiring.
Cabinet Type and Port Position
Both Delta and Theta 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 Delta's and Triangle Signature Theta's external dimensions. Triangle Signature Delta has external dimensions of 1170.0 x 233.0 x 372.0mm (46-1/16 x 9-3/16 x 14-5/8inch) whereas 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).
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.
Near-identical footprints. Triangle Signature Delta is 705mm 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 Delta is approximately 866.8cm2 / 134.4inch2 and base area of the Triangle Signature Theta is approximately 866.8cm2 / 134.4inch2.