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AHD Speakers Comparison

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AHD Speakers - Round
Model
Size
Imp (Ohm)
Pwr (W)
Notes
AHD 0.50 Dia Speaker 13 mm (0.5") dia
3 mm (0.125") H
8
0.1
This is the smallest speaker we have for DCC. The sound output is acceptable. Use when there are no other choices. Use 5 Ohm 1/2 W resistor in series with either Soundtraxx speaker lead to protect from overload! N & HO scales.
AHD 0.63 Dia Speaker 16 mm (0.63") dia
3 mm (0.125") H
8
0.1
This speaker produces good volumes when properly enclosed in AHD Enclosure and fits in HO, narrow body diesels and N tenders.
AHD 0.75 Dia Speaker 19 mm (0.75") dia
3 mm (0.125") H
8
0.1
Produces good volumes when properly enclosed in AHD 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.
AHD 1.00 Dia Speaker 25 mm (1.0") dia
5.1 mm (0.2") H
8
0.1
This is good choice for HO modelers. Produces great sound in many HO Diesels when used with AHD Enclosure and most HO steam using the tender for enclosure. This may fit where the 1.10” below may not! HO & larger scales.
AHD 1.10 Dia Speaker 28 mm (1.1") dia
5.1 mm (0.2") H
8
0.1
This is the # 1 choice for HO modelers. Produces great sound in many HO Diesels when used with AHD Enclosure and most HO steam using the tender for enclosure. Use 5 Ohm resistor as above. HO & larger scales.
AHD 1.20 Dia Speaker 30 mm (1.2") dia
5.1 mm (0.2") H
8
0.1
This is good choice for large HO Steam tenders Produces great sound. Use 5 Ohm resistor as above. HO & larger scales.

0.50
0.63
0.75
1.00
1.10
1.20

AHD Speakers - Oval

Model
Size
Imp (Ohm)
Pwr (W)
Notes
AHD Mini Oval Speaker
24 x 14 mm
(0.95" x 0.55")
4 mm (0.16") H
8
1.0
Suitable for narrow hood, HO Diesels and some N Steam tenders!
AHD Small Oval Speaker
35 x 16 mm
(1.38" x 0.63")
8 mm (0.32") H
8
1.0
Suitable for narrow hood, HO Diesels.
AHD Medium Oval Speaker
35 x 20 mm
(1.38" x 0.79")
8 mm (0.32") H
8
1.0
This speaker is perfect for narrow HO tenders and some HO narrow diesels especially with dynamic brake fairings. HO and larger scales.
AHD Large Oval Speaker
40 x 28 mm
(1.57" x 1.10")
11 mm (0.43") H
8
1.0
This 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.

Large Oval
Medium Oval
Mini Oval
Small Oval

AHD Speaker Enclosures

For Round Speakers
Model Dia Height Application
0.50 0.63 in
16 mm
0.3 & 0.5 inch
7.62 & 12.7 mm
Fits the AHD 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 AHD 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 AHD 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 AHD 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 AHD 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 AHD 1.2" speaker, comes with two height options.
For Oval Speakers
Model Dimensions Height Application
Mini .62 X 1.05 in
15.8 X 26.7 mm
0.25 in
6.35 mm
Fits the AHD Mini Oval speaker.
Small .7 X 1.45 in
17.8 X 36.8 mm
0.34 in
8.64 mm
Fits the AHD Small Oval speaker.
Medium .86 X 1.65 in
21.9 X 41.9 mm
0.4 in
10.16 mm
Fits the AHD Medium Oval speaker.
Large 1.2 X 1.65 in
30.5 X 41.9 mm
0.5 in
12.7 mm
Fits the AHD Large Oval speaker.
Tech Info
AHD
Athearn
Broadway Ltd
Circuitron
CMX Products
DCC Specialties
Digitrax
Generic / Other
Lenz
Miniatronics
MRC
NCE Corporation
Pricom Design
Soundtraxx
TDP Associates