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  HOME > TECH BULLETIN > DCC SOUND > DREAM SPEAKERS >

 

Speakers

Summary
0.50 Dia
0.63 Dia
0.75 Dia
1.00 Dia
1.10 Dia
1.20 Dia
1.25 Dia
Micro Oval
Mini Oval
Small Oval
Medium Oval
Large Oval

Testing

Introduction
Testing Procedure
Test Results
Testing Board
Products and Specifications

 

 

Test Results

  1. Use DSX Shay Decoders with 220µf capacitors
  2. Compare speakers to one another one at a time
  3. Set the CV 50 (Volume) for each speaker to the value listed in Column 3
  4. Score 1 point below for better speaker in each comparison, 0 points for the other speaker (in bordered white area)
  5. To minimize the number of speaker connection and disconnections, compare each speaker in turn with the speaker in the second column on the left.

Group 1 - Oval
Spkr #
Speaker
Designation
Volume
CV Setting
for 55 dB
Speaker
Total
2
3
4
5
6
7
1
A2 40x28-8
6
1:0
1:0
1:0
1:1
1:0
0:1
5
2
C 40x30-12-8
5

1:0
0:1
0:1
1:0
0:1
2
3
K 40x28-8
4


1:0
0:1
1:0
0:1
2
4
R 30x40-8
4



1:0
1:0
0:1
3
5
TTE 30x40mm
5




1:0
0:1
4
6
U 40x28-8
4





0:1
0
7
Y 40x28-8
5






6

Group 2 - Oval
Spkr #
Speaker
Designation
Volume
CV Setting
for 55 dB
Speaker
Total
Note
2
3
4
5
6
7
8
9
10
1
A1 35x20-8
5
0:1
0:1
0:1
0:1
0:1
0:1
0:1

0:1
0

2
A2 35x20-8
6

1:0
1:1
0:1
1:0
1:0
0:1

1:0
7

3
C 35x20-8.0-8
4


1:1
0:1
0:1
0:1
0:1

0:1
3
Whistle has distortion
4
C 35x20-8.2-8
5



0:1
1:0
1:1
1:1

0:1
6

5
C 40x20-12-8
4




1:1
0:1
0:1

0:1
5

6
C 40x20-12A-8
5





0:1
0:1

0:1
3

7
K 35x20x8.2-8
4






0:1

0:1
5

8
R 20x35x5.5-8
6








1:0
8
Whistle has distortion
9
TTE 20x40mm
4









0

10
U 40x20-8
7









6
Whistle has distortion

Group 3 - Oval
Spkr #
Speaker
Designation
Volume
CV Setting
for 55 dB
Speaker
Total
2
3
4
5
6
7
8
9
10
1
A1 35x16-8
5
1:0
0:1
0:1
1:0
1:0
0:1
0:1
1:0
1:0
5
2
A2 25x14-8
6

0:1
1:1
1:0
1:0
0:1
0:1
0:1
1:0
4
3
A2 30x16-8
7


1:0
1:0
1:0
1:1
0:1
1:0
1:0
8
4
A2 35x16-8
6



1:0
1:0
1:1
0:1
1:0
1:0
7
5
C 35x16x4.6-8
4




1:0
0:1
0:1
0:1
1:1
2
6
C 35x16X5.5-8
4





0:1
0:1
0:1
1:0
1
7
TTE 16x35mm
6






0:1
1:0
1:0
8
8
U 24x14-8
7







1:0
1:0
9
9
Y 25x15-8
6








0:1
3
10
Y 35x16
6









2

Group 4 - 1.6"
Spkr #
Speaker
Designation
Volume
CV Setting
for 55 dB
Speaker
Total
2
3
4
1
A1 40x5.5-8
3
0:1
1:0
0:1
1
2
A2 40x9.5-8
5

1:0
1:0
0
3
A2 40x9.6-8
8


0:1
0
4
R 36x5.0-8
4



2

Group 5 - 1"
Spkr #
Speaker
Designation
Volume
CV Setting
for 55 dB
Speaker
Total
2
3
4
5
6
1
A2 30x5.8-8
8
1:0
0:1
1:0
0:1
0:1
2
2
C 26x5.0-8
5

1:0
1:0
1:0
0:1
4
3
C 28x4.0-8
6


1:0
1:0
0:1
4
4
K 27x 5.6-8
5



1:0
0:1
1
5
K 28x4.0-8
4




0:1
1
6
Y 30x5.6-8
6





5

Group 6 - 3/4"
Spkr #
Speaker
Designation
Volume
CV Setting
for 55 dB
Speaker
Total
2
3
4
5
1
C 20x3.0-8
6
0:1
0:1
1:0
1:0
2
2
C 22x3.5-8
5

0:1
0:1
0:1
1
3
K 20x3.0-8
5


1:0
0:1
3
4
K 20x3.8-8
5



0:1
1
5
U 20x3.4-8
6




3

Group 7 - 1/2"
Spkr #
Speaker
Designation
Volume
CV Setting
for 55 dB
Speaker
Total
2
3
4
1
A1 15x5.6-8
5
0:1
1:0
1:0
2
2
R 16x3.5-8
12

1:0
1:0
3
3
U 17x4.0-8
4


1:0
1
4
Y 15x5.2-8
6



0

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