QSI HB (High Bass) Speakers

Model
Size
Imp (Ohm)
Pwr (W)
Notes
HB78S QSI HB Speaker 0.78" Square
0.36" Height
8
1.0 - 2.0
 Special speaker for HO scale sound applications that provide significantly more base.
HB90S QSI HB Speaker 0.90" Square
0.39" Height
8
1.0 - 2.0
 Special speaker for HO scale sound applications that provide significantly more base.
HB106R QSI HB Speaker 1.06" Diameter
0.56" Height
8
2.0
 HO size, significantly better bass response
HB110S QSI HB Speaker 1.10" Square
0.44" Height
8
2.0
 HO size, significantly better bass response
HB110SB QSI HB Speaker with Box 1.10" Square
0.52" Height
8
2.0
 Speaker and box combined, One of our most popular speakers
HB122R QSI HB Speaker 1.22" Round
0.63" Height
8
2.0
 HO size, significantly better bass response
HB157S QSI HB Speaker 1.57" Square
0.57" Height
8
2.0
 HO size, significantly better bass response
HB177R QSI HB Speaker 1.77" Round
0.81" Height
8
2.0
 HO size, significantly better bass response
HB207S QSI HB Speaker 2.07" Square
0.94" Height
8
2.0
 HO size, significantly better bass response

QSI HP (High Performance) Speakers

Model
Size
Imp (Ohm)
Pwr (W)
Notes
HP225R QSI HP Speaker 2.25 " Round
1.1" Height
8
3.0
HP250S QSI HP Speaker 2.50 " Square
0.8" Height
8
1.0
HP300S QSI HP Speaker 3.00 " Round
1.7" Height
8
5.0
HP300SLP QSI HP Speaker 3.00 " Round
1.7" Height
8
5.0
HP350S QSI HP Speaker 3.50 " Square
1.7" Height
8
6.0
HP400S QSI HP Speaker 4.00 " Square
1.9" Height
8
15.0

Tony's Dream Speakers - Round

Model
Size
Imp (Ohm)
Pwr (W)
Notes
TDS 0.50 Dia Speaker 13 mm (0.5") dia
3 mm (0.125") H
8
0.1
 Use 5 Ohm 1/2 W resistor in series with either Soundtraxx speaker lead to protect from overload! N & HO scales.
TDS 0.63 Dia Speaker 16 mm (0.63") dia
17.9 mm (0.7") with enclosure
3.5 mm (0.14") H
7.4 mm (0.29") with 1/2 enclosure
12.5 mm (0.49") with full enclosure
8
0.1
 This speaker produces good volumes when properly enclosed in TDS Enclosure and fits in HO, narrow body diesels and N tenders.
TDS 0.75 Dia Speaker 20.00 mm (0.79") dia
22.2 mm (0.87") with enclosure
3.4 mm (0.13") H
6.9 mm (0.27") with 1/2 enclosure
12.1 mm (0.47") with full enclosure
8
0.2
 Produces good volumes when properly enclosed in TDS Enclosure. We also use two speakers, back to back. Suitable for N scale steam tenders and almost all HO narrow body diesels. Use 5 ohm resistor as stated above. N & HO scales.
TDS 1.00 Dia Speaker 25.9 mm (1.02") dia
28.5 mm (1.12") with enclosure
4.7 mm (0.185") H
8.1 mm (0.32") with 1/2 enclosure
13.2 mm (0.52") with full enclosure
8
0.4
 This is a good choice for HO modelers. Produces good sound in many HO Diesels when used with TDS Enclosure and most HO steam using the tender for enclosure. This may fit where the 1.10” below may not! HO & larger scales.
TDS 1.10 Dia Speaker 28 mm (1.1") dia
30.7 mm (1.2") with enclosure
5.1 mm (0.2") H
8 mm (0.32") with 1/2 enclosure
13.1 mm (0.52") with full enclosure
8
0.8
 This is one of the 1st choices for HO modelers. Produces very good sound in many HO Diesels when used with TDS Enclosure and most HO steam using the tender for enclosure. Use 5 Ohm resistor as above. HO & larger scales.
TDS 1.20 Dia Speaker 30 mm (1.17") dia
31.9 mm (1.25") with enclosure
5.7 mm (0.22") H
12.5 mm (0.49") with 1/2 enclosure
20.4 mm (0.8") with full enclosure
8
0.05
 This is good choice for large HO Steam tenders Produces great sound. Use 5 Ohm resistor as above. HO & larger scales.
TDS 1.25 Dia Speaker 32 mm (1.26") dia
33.9 mm (1.33") with enclosure
4.8 mm (0.18") H
9.9 mm (0.39") with 1/2 enclosure
15.5 mm (0.61") with full enclosure
8
0.5
 Best sounding of the Round Series speakers. Can fit in very large HO Scale Tenders and Atlas HO Scale diesel locomotives with A-Frame

Tony's Dream Speakers - Oval 

Model
Size
Imp (Ohm)
Pwr (W)
Notes
TDS Micro Oval Speaker 15 x 10 mm (0.59" x 0.39")
3.5 mm (0.14") H
8
0.5 / 1.0
 Discontinued, no longer available. See TDS SuperSonics
TDS Mini Oval Speaker 24 x 14 mm (0.95" x 0.55")
15.9 mm (.55") W with enclosure
26.7 mm (1.05") L with enclosure
3.9 mm (0.15") H
8.8 mm (0.35") H with enclosure
8
0.3
 Discontinued, no longer available. See TDS SuperSonics
TDS Small Oval Speaker 35 x 16.2 mm (1.38" x 0.63")
18.3 mm (0.72") W with enclosure
36.9 mm (1.45") L with enclosure
8.1 mm (0.37") H
9.1 mm (0.36") H with enclosure
8
1.0
 Suitable for narrow hood, HO Diesels.
TDS Medium Oval Speaker 34.7 x 20 mm (1.37" x 0.79")
21.8 mm (0.86") W with enclosure
36.8 mm (1.45") L with enclosure
7.9 mm (0.30") H
9.7 mm (0.38") H with enclosure
8
1.0
 This Dream Speaker is perfect for narrow HO tenders and some HO narrow diesels especially with dynamic brake fairings. HO and larger scales.
TDS Large Oval Speaker 40 x 29 mm (1.58" x 1.12")
30.4 mm (1.19") W with enclosure
42.0 mm (1.65") L with enclosure
11.6 mm (0.46") H
13.1 mm (0.52") H with enclosure
8
1.0
 This Dream Speaker is the #1 choice for HO steam tenders and some wide cab HO diesels. It provides maximum output available for HO and also works well in larger scales.

TDS Enclosures

Model Diameter or Side Height Application
EHB78S 0.885" 0.45" Fits the HB78S speaker.
EHB90S 0.98" Side 0.50" Fits the HB90S speaker.
EHB106R 1.19" Dia 0.65" Fits the HB106R speaker.
EHB110S 1.18" Side 0.54" Fits the HB110S speaker.
EHB122R 1.35" Dia 0.70" Fits the HB122R speaker. Speaker does not protrude.

Tony's Enclosures

For Round Speakers For Oval Speakers
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speakez_ellip300
Model Dia Height Application
0.50 0.63 in
16 mm		 0.3 & 0.5 inch
7.62 & 12.7 mm		 Fits the TDS 0.5" speaker, comes with two height options.
0.63 0.69 in
18 mm		 0.29 & 0.5 inch
7.4 & 12.7 mm		 Fits the TDS 0.63" speaker, comes with two height options.
0.75 0.87 in
22.1 mm		 0.23 & 0.44 inch
5.8 & 11.2 mm		 Fits the TDS 0.75" speaker, comes with two height options.
1.00 1.12 in
28.5 mm		 0.3 & 0.5 inch
7.62 & 12.7 mm		 Fits the TDS 1.0" speaker, comes with two height options.
1.10 1.2 in
30.5 mm		 0.31 & 0.51 inch
7.9 & 13 mm		 Fits the TDS 1.1" speaker, comes with two height options.
1.20 1.25 in
31.75 mm		 0.47 & 0.79 inch
12 & 20 mm		 Fits the TDS 1.2" speaker, comes with two height options.
Model Dimensions Height Application
Micro 0.64" x 0.46"
16.5 x 11.7 mm		 0.28 in
6 mm		 Fits the TDS Micro Oval speaker.
Mini .62 X 1.05 in
15.8 X 26.7 mm		 0.25 in
6.35 mm		 Fits the TDS Mini Oval speaker.
Small .7 X 1.45 in
17.8 X 36.8 mm		 0.34 in
8.64 mm		 Fits the TDS Small Oval speaker.
Medium .86 X 1.65 in
21.9 X 41.9 mm		 0.4 in
10.16 mm		 Fits the TDS Medium Oval speaker.
Large 1.2 X 1.65 in
30.5 X 41.9 mm		 0.5 in
12.7 mm		 Fits the TDS Large Oval speaker.