1. Sets
  2. Trains
  3. 9V
4548 LEGO Trains Transformer and Speed Regulator thumbnail image

4548 LEGO Trains Transformer and Speed Regulator
Images 5Description 
4548 LEGO Trains Transformer and Speed Regulator
  • Transformer and Speed Regulator thumbnail
  • Transformer and Speed Regulator thumbnail
  • Transformer and Speed Regulator thumbnail
  • Transformer and Speed Regulator thumbnail
  • Transformer and Speed Regulator thumbnail

LEGO 4548 Transformer and Speed Regulator is a vintage Trains set from 1991 valued at $112 for new and sealed sets, up 166% from an original retail price of $41.99. Annual appreciation has averaged 3.46% since release. On the used market, values range from $53 to $76 based on condition. Secondary market prices for new and sealed sets typically fall between $107 and $139.

Set Value (New/Sealed)

This chart represents the current new/sealed value of the set Transformer and Speed Regulator since June 2016. Very high accuracy
LEGO 4548 Transformer and Speed Regulator is a Trains 9V accessory set released in 1991, containing 3 pieces. It includes a 9V transformer, a dial-type speed regulator, and a connecting cable used to power and control LEGO 9V train motors. The regulator provides twelve positions with forward and reverse operation, offering six speed settings in each direction. Designed for the 9V track system, it supplies variable power for trains and compatible 9V accessories.

A new and sealed Transformer and Speed Regulator is currently valued at around $112, with annual growth of approximately 2%, which is lower than other 9V sets. The average used price is $64 for those in good overall condition. New and sealed listings currently range from $111 to $138. Based on current trends, this set could be valued near $116 within the next year.
All regions

For Sale (New/Sealed)

 (US) *** Best US listing for Transformer and Speed Regulator ***
BrickEconomy Choice
$140.00
(DK) BrickLink store BrickNestDK $104.81
-6.2%
(BE) BrickLink store The Collectible Brick $107.54
-3.8%
(DE) - Box has small dents on one corner and a price tag on the cover $115.67
+3.5%
(DK) Box in perfect condintion. No wear, seals are perfect. Grey / blue edition box. $116.07
+3.8%
(NL) NEW box open $124.16
+11.1%
(US) Includes box, but it's not in good condition. Do not buy if you are a box collector. $135.00
+20.8%
(US) 9V Electric Train Speed Regulator 4548 $140.00
+25.2%
(NL) MISB. Excellent box. $152.95
+36.8%

Sales Distribution (Last 90 Days)

This chart shows the distribution of sales for the past three months of new/sealed 4548 Transformer and Speed Regulator.

Contained In Sets

65537 Classic Freight Train

Theme / Subtheme Trains / Value Packs
Year 2004
Pieces 608
Availability Retired
65537 LEGO Classic Freight Train
Retail $79.99
Value $2,371.04
Growth  +2864.2%
Annual growth 13.4%

Sets in Trains / 9V

4558 Metroliner

Theme / Subtheme Trains / 9V
Year 1991
Pieces / Minifigs 784 / 11
Availability Retired
4558 LEGO Trains Metroliner
Retail $139.99
Value $1,381.32
Growth  +886.7%
Annual growth 5.7%

4554 Metro Station

Theme / Subtheme Trains / 9V
Year 1991
Pieces / Minifigs 600 / 8
Availability Retired
4554 LEGO Trains Metro Station
Retail $72.00
Value $524.46
Growth  +628.4%
Annual growth 5.1%

4563 Load and Haul Railroad

Theme / Subtheme Trains / 9V
Year 1991
Pieces / Minifigs 476 / 3
Availability Retired
4563 LEGO Trains Load and Haul Railroad
Retail $119.99
Value $702.43
Growth  +485.4%
Annual growth 3.8%

4551 Crocodile Locomotive

Theme / Subtheme Trains / 9V
Year 1991
Pieces / Minifigs 314 / 1
Availability Retired
4551 LEGO Trains Crocodile Locomotive
Retail $49.99
Value $983.55
Growth  +1867.5%
Annual growth 6.7%

4543 Railroad Tractor Flatbed

Theme / Subtheme Trains / 9V
Year 1991
Pieces / Minifigs 178 / 1
Availability Retired
4543 LEGO Trains Railroad Tractor Flatbed
Retail $21.99
Value $586.98
Growth  +2569.3%
Annual growth 6.6%

4536 Blue Hopper Car

Theme / Subtheme Trains / 9V
Year 1991
Pieces 166
Availability Retired
4536 LEGO Trains Blue Hopper Car
Retail $14.99
Value $195.60
Growth  +1204.9%
Annual growth 4.5%

4539 Manual Level Crossing

Theme / Subtheme Trains / 9V
Year 1991
Pieces / Minifigs 110 / 1
Availability Retired
4539 LEGO Trains Manual Level Crossing
Retail $24.99
Value $290.59
Growth  +1062.8%
Annual growth 5.6%

4546 Road and Rail Maintenance

Theme / Subtheme Trains / 9V
Year 1991
Pieces / Minifigs 77 / 1
Availability Retired
4546 LEGO Trains Road and Rail Maintenance
Retail $9.99
Value $102.58
Growth  +926.8%
Annual growth 11.9%

4515 Straight Rails

Theme / Subtheme Trains / 9V
Year 1991
Pieces 8
Availability Retired
4515 LEGO Trains Straight Rails
Retail $12.99
Value $63.22
Growth  +386.7%
Annual growth 4.7%

4520 Curved Rails

Theme / Subtheme Trains / 9V
Year 1991
Pieces 8
Availability Retired
4520 LEGO Trains Curved Rails
Retail $12.99
Value $21.89
Growth  +68.5%
Annual growth 2.8%

4531 Manual Points with Track

Theme / Subtheme Trains / 9V
Year 1991
Pieces 6
Availability Retired
4531 LEGO Trains Manual Points with Track
Retail $27.99
Value $59.99
Growth  +114.3%
Annual growth 2.0%

My Collection

Transformer and Speed Regulator Reviews

19 reviews
4.7
Collectors
Investors
BrickTrains-Sets
“The set includes three pieces, one being the speed regulator, the Transformer, and the rail connecter. The train connector was a set of wires that would connect to the rails, and the other side would connect the speed regulator itself. It is most similar to the 12 volt line,... More seeing both use a speed regulator, and use electric charged rail but the 9 volt line perfected it. This set itself was a back-up or an extra for any Lego train Track and was bought if the original one broke. This would make a great addition to any Lego train track.”
Full review at bricktrains-sets.com
BrickEconomy Member Review
“The 9V Transformer and Speed Regulator is a robust and reliable piece, perfect for powering older LEGO train systems. Its simplicity and durability make it easy to use, and it’s a great solution for powering models without relying on batteries, especially when paired with an extension wire for newer Power Functions.”
 

About Trains 9V

LEGO Trains is one of the longer running themes that dates back from 1966 and ran up until 2006. During its run there were multiple sets released running on various power platforms from 4.5volt, to 9 and 12 volt sets. Later in 2011 LEGO released additional train sets using RC and Power Functions controllers under different themes like City.

9V consists of 67 sets that ran from 1991 to 2006. As of today, 4558 Metroliner is the most valuable 9V set with an estimated new/factory sealed value of $1,381.
Summary
Trains 9V Transformer and Speed Regulator set 4548 was released in September 1991, retailing for $42, but has since been retired. New, unopened Transformer and Speed Regulator sets are valued at $112, while used sets can be found for $64.
Read more
No city is complete without a railway. LEGO® SYSTEM Trains can be built in a new way every day. With the new Freight Express- train you can take ET EFORE THE almost anything by rail. With no batteries but a transformer instead, the fun can go on and on. The conducting rails connect firmly and easily. The electric current conducts to the motor through the metal wheels. It's as simple as it is reliable. Electric 9V SYSTEM The electric System with conducting rails, flashing lights, electric motors, etc. makes several sets even more realistic and exciting. -
Description provided by LEGO©